tcodereview: import from Go - plan9port - [fork] Plan 9 from user space
 (HTM) git clone git://src.adamsgaard.dk/plan9port
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       ---
 (DIR) commit 26b4bea821f9e23d1519c46c4d01b601430f13b0
 (DIR) parent de1755b58dd9a4a7523d5303799e43db44c25cec
 (HTM) Author: Russ Cox <rsc@swtch.com>
       Date:   Tue,  2 Aug 2011 14:20:20 -0400
       
       codereview: import from Go
       
       R=rsc
       http://codereview.appspot.com/4819053
       
       Diffstat:
         M lib/codereview/codereview.py        |    3403 ++++++++++++++++---------------
       
       1 file changed, 1718 insertions(+), 1685 deletions(-)
       ---
 (DIR) diff --git a/lib/codereview/codereview.py b/lib/codereview/codereview.py
       t@@ -1,12 +1,14 @@
       -#!/usr/bin/env python
       -#
       +# coding=utf-8
       +# (The line above is necessary so that I can use 世界 in the
       +# *comment* below without Python getting all bent out of shape.)
       +
        # Copyright 2007-2009 Google Inc.
        #
        # Licensed under the Apache License, Version 2.0 (the "License");
        # you may not use this file except in compliance with the License.
        # You may obtain a copy of the License at
        #
       -#     http://www.apache.org/licenses/LICENSE-2.0
       +#        http://www.apache.org/licenses/LICENSE-2.0
        #
        # Unless required by applicable law or agreed to in writing, software
        # distributed under the License is distributed on an "AS IS" BASIS,
       t@@ -43,10 +45,23 @@ import stat
        import subprocess
        import threading
        from HTMLParser import HTMLParser
       +
       +# The standard 'json' package is new in Python 2.6.
       +# Before that it was an external package named simplejson.
        try:
       -        from xml.etree import ElementTree as ET
       -except:
       -        from elementtree import ElementTree as ET
       +        # Standard location in 2.6 and beyond.
       +        import json
       +except Exception, e:
       +        try:
       +                # Conventional name for earlier package.
       +                import simplejson as json
       +        except:
       +                try:
       +                        # Was also bundled with django, which is commonly installed.
       +                        from django.utils import simplejson as json
       +                except:
       +                        # We give up.
       +                        raise e
        
        try:
                hgversion = util.version()
       t@@ -108,6 +123,63 @@ server = "codereview.appspot.com"
        server_url_base = None
        defaultcc = None
        contributors = {}
       +missing_codereview = None
       +real_rollback = None
       +releaseBranch = None
       +
       +#######################################################################
       +# RE: UNICODE STRING HANDLING
       +#
       +# Python distinguishes between the str (string of bytes)
       +# and unicode (string of code points) types.  Most operations
       +# work on either one just fine, but some (like regexp matching)
       +# require unicode, and others (like write) require str.
       +#
       +# As befits the language, Python hides the distinction between
       +# unicode and str by converting between them silently, but
       +# *only* if all the bytes/code points involved are 7-bit ASCII.
       +# This means that if you're not careful, your program works
       +# fine on "hello, world" and fails on "hello, 世界".  And of course,
       +# the obvious way to be careful - use static types - is unavailable.
       +# So the only way is trial and error to find where to put explicit
       +# conversions.
       +#
       +# Because more functions do implicit conversion to str (string of bytes)
       +# than do implicit conversion to unicode (string of code points),
       +# the convention in this module is to represent all text as str,
       +# converting to unicode only when calling a unicode-only function
       +# and then converting back to str as soon as possible.
       +
       +def typecheck(s, t):
       +        if type(s) != t:
       +                raise util.Abort("type check failed: %s has type %s != %s" % (repr(s), type(s), t))
       +
       +# If we have to pass unicode instead of str, ustr does that conversion clearly.
       +def ustr(s):
       +        typecheck(s, str)
       +        return s.decode("utf-8")
       +
       +# Even with those, Mercurial still sometimes turns unicode into str
       +# and then tries to use it as ascii.  Change Mercurial's default.
       +def set_mercurial_encoding_to_utf8():
       +        from mercurial import encoding
       +        encoding.encoding = 'utf-8'
       +
       +set_mercurial_encoding_to_utf8()
       +
       +# Even with those we still run into problems.
       +# I tried to do things by the book but could not convince
       +# Mercurial to let me check in a change with UTF-8 in the
       +# CL description or author field, no matter how many conversions
       +# between str and unicode I inserted and despite changing the
       +# default encoding.  I'm tired of this game, so set the default
       +# encoding for all of Python to 'utf-8', not 'ascii'.
       +def default_to_utf8():
       +        import sys
       +        reload(sys)  # site.py deleted setdefaultencoding; get it back
       +        sys.setdefaultencoding('utf-8')
       +
       +default_to_utf8()
        
        #######################################################################
        # Change list parsing.
       t@@ -126,9 +198,9 @@ diff --git a/~rietveld~placeholder~ b/~rietveld~placeholder~
        new file mode 100644
        """
        
       -
        class CL(object):
                def __init__(self, name):
       +                typecheck(name, str)
                        self.name = name
                        self.desc = ''
                        self.files = []
       t@@ -139,18 +211,22 @@ class CL(object):
                        self.web = False
                        self.copied_from = None        # None means current user
                        self.mailed = False
       +                self.private = False
        
                def DiskText(self):
                        cl = self
                        s = ""
                        if cl.copied_from:
                                s += "Author: " + cl.copied_from + "\n\n"
       +                if cl.private:
       +                        s += "Private: " + str(self.private) + "\n"
                        s += "Mailed: " + str(self.mailed) + "\n"
                        s += "Description:\n"
                        s += Indent(cl.desc, "\t")
                        s += "Files:\n"
                        for f in cl.files:
                                s += "\t" + f + "\n"
       +                typecheck(s, str)
                        return s
        
                def EditorText(self):
       t@@ -161,6 +237,8 @@ class CL(object):
                                s += "Author: " + cl.copied_from + "\n"
                        if cl.url != '':
                                s += 'URL: ' + cl.url + '        # cannot edit\n\n'
       +                if cl.private:
       +                        s += "Private: True\n"
                        s += "Reviewer: " + JoinComma(cl.reviewer) + "\n"
                        s += "CC: " + JoinComma(cl.cc) + "\n"
                        s += "\n"
       t@@ -175,6 +253,7 @@ class CL(object):
                                for f in cl.files:
                                        s += "\t" + f + "\n"
                                s += "\n"
       +                typecheck(s, str)
                        return s
        
                def PendingText(self):
       t@@ -189,11 +268,12 @@ class CL(object):
                        s += "\tFiles:\n"
                        for f in cl.files:
                                s += "\t\t" + f + "\n"
       +                typecheck(s, str)
                        return s
        
                def Flush(self, ui, repo):
                        if self.name == "new":
       -                        self.Upload(ui, repo, gofmt_just_warn=True)
       +                        self.Upload(ui, repo, gofmt_just_warn=True, creating=True)
                        dir = CodeReviewDir(ui, repo)
                        path = dir + '/cl.' + self.name
                        f = open(path+'!', "w")
       t@@ -204,7 +284,8 @@ class CL(object):
                        os.rename(path+'!', path)
                        if self.web and not self.copied_from:
                                EditDesc(self.name, desc=self.desc,
       -                                reviewers=JoinComma(self.reviewer), cc=JoinComma(self.cc))
       +                                reviewers=JoinComma(self.reviewer), cc=JoinComma(self.cc),
       +                                private=self.private)
        
                def Delete(self, ui, repo):
                        dir = CodeReviewDir(ui, repo)
       t@@ -216,13 +297,15 @@ class CL(object):
                                s = s[0:55] + "..."
                        if self.name != "new":
                                s = "code review %s: %s" % (self.name, s)
       +                typecheck(s, str)
                        return s
        
       -        def Upload(self, ui, repo, send_mail=False, gofmt=True, gofmt_just_warn=False):
       -                if not self.files:
       +        def Upload(self, ui, repo, send_mail=False, gofmt=True, gofmt_just_warn=False, creating=False, quiet=False):
       +                if not self.files and not creating:
                                ui.warn("no files in change list\n")
                        if ui.configbool("codereview", "force_gofmt", True) and gofmt:
       -                        CheckGofmt(ui, repo, self.files, just_warn=gofmt_just_warn)
       +                        CheckFormat(ui, repo, self.files, just_warn=gofmt_just_warn)
       +                set_status("uploading CL metadata + diffs")
                        os.chdir(repo.root)
                        form_fields = [
                                ("content_upload", "1"),
       t@@ -230,18 +313,21 @@ class CL(object):
                                ("cc", JoinComma(self.cc)),
                                ("description", self.desc),
                                ("base_hashes", ""),
       -                        # Would prefer not to change the subject
       -                        # on reupload, but /upload requires it.
       -                        ("subject", self.Subject()),
                        ]
        
       -                # NOTE(rsc): This duplicates too much of RealMain,
       -                # but RealMain doesn't have the most reusable interface.
                        if self.name != "new":
                                form_fields.append(("issue", self.name))
                        vcs = None
       -                if self.files:
       -                        vcs = GuessVCS(upload_options)
       +                # We do not include files when creating the issue,
       +                # because we want the patch sets to record the repository
       +                # and base revision they are diffs against.  We use the patch
       +                # set message for that purpose, but there is no message with
       +                # the first patch set.  Instead the message gets used as the
       +                # new CL's overall subject.  So omit the diffs when creating
       +                # and then we'll run an immediate upload.
       +                # This has the effect that every CL begins with an empty "Patch set 1".
       +                if self.files and not creating:
       +                        vcs = MercurialVCS(upload_options, ui, repo)
                                data = vcs.GenerateDiff(self.files)
                                files = vcs.GetBaseFiles(data)
                                if len(data) > MAX_UPLOAD_SIZE:
       t@@ -251,6 +337,12 @@ class CL(object):
                                        uploaded_diff_file = [("data", "data.diff", data)]
                        else:
                                uploaded_diff_file = [("data", "data.diff", emptydiff)]
       +                
       +                if vcs and self.name != "new":
       +                        form_fields.append(("subject", "diff -r " + vcs.base_rev + " " + getremote(ui, repo, {}).path))
       +                else:
       +                        # First upload sets the subject for the CL itself.
       +                        form_fields.append(("subject", self.Subject()))
                        ctype, body = EncodeMultipartFormData(form_fields, uploaded_diff_file)
                        response_body = MySend("/upload", body, content_type=ctype)
                        patchset = None
       t@@ -260,7 +352,11 @@ class CL(object):
                                msg = lines[0]
                                patchset = lines[1].strip()
                                patches = [x.split(" ", 1) for x in lines[2:]]
       -                ui.status(msg + "\n")
       +                if response_body.startswith("Issue updated.") and quiet:
       +                        pass
       +                else:
       +                        ui.status(msg + "\n")
       +                set_status("uploaded CL metadata + diffs")
                        if not response_body.startswith("Issue created.") and not response_body.startswith("Issue updated."):
                                raise util.Abort("failed to update issue: " + response_body)
                        issue = msg[msg.rfind("/")+1:]
       t@@ -268,33 +364,42 @@ class CL(object):
                        if not self.url:
                                self.url = server_url_base + self.name
                        if not uploaded_diff_file:
       +                        set_status("uploading patches")
                                patches = UploadSeparatePatches(issue, rpc, patchset, data, upload_options)
                        if vcs:
       +                        set_status("uploading base files")
                                vcs.UploadBaseFiles(issue, rpc, patches, patchset, upload_options, files)
                        if send_mail:
       +                        set_status("sending mail")
                                MySend("/" + issue + "/mail", payload="")
                        self.web = True
       +                set_status("flushing changes to disk")
                        self.Flush(ui, repo)
                        return
        
       -        def Mail(self, ui,repo):
       +        def Mail(self, ui, repo):
                        pmsg = "Hello " + JoinComma(self.reviewer)
                        if self.cc:
                                pmsg += " (cc: %s)" % (', '.join(self.cc),)
                        pmsg += ",\n"
                        pmsg += "\n"
       +                repourl = getremote(ui, repo, {}).path
                        if not self.mailed:
       -                        pmsg += "I'd like you to review this change.\n"
       +                        pmsg += "I'd like you to review this change to\n" + repourl + "\n"
                        else:
                                pmsg += "Please take another look.\n"
       +                typecheck(pmsg, str)
                        PostMessage(ui, self.name, pmsg, subject=self.Subject())
                        self.mailed = True
                        self.Flush(ui, repo)
        
        def GoodCLName(name):
       +        typecheck(name, str)
                return re.match("^[0-9]+$", name)
        
        def ParseCL(text, name):
       +        typecheck(text, str)
       +        typecheck(name, str)
                sname = None
                lineno = 0
                sections = {
       t@@ -305,6 +410,7 @@ def ParseCL(text, name):
                        'Reviewer': '',
                        'CC': '',
                        'Mailed': '',
       +                'Private': '',
                }
                for line in text.split('\n'):
                        lineno += 1
       t@@ -338,6 +444,7 @@ def ParseCL(text, name):
                        i = line.find('#')
                        if i >= 0:
                                line = line[0:i].rstrip()
       +                line = line.strip()
                        if line == '':
                                continue
                        cl.files.append(line)
       t@@ -347,26 +454,32 @@ def ParseCL(text, name):
                if sections['Mailed'] != 'False':
                        # Odd default, but avoids spurious mailings when
                        # reading old CLs that do not have a Mailed: line.
       -                # CLs created with this update will always have
       +                # CLs created with this update will always have 
                        # Mailed: False on disk.
                        cl.mailed = True
       +        if sections['Private'] in ('True', 'true', 'Yes', 'yes'):
       +                cl.private = True
                if cl.desc == '<enter description here>':
                        cl.desc = ''
                return cl, 0, ''
        
        def SplitCommaSpace(s):
       +        typecheck(s, str)
                s = s.strip()
                if s == "":
                        return []
                return re.split(", *", s)
        
        def CutDomain(s):
       +        typecheck(s, str)
                i = s.find('@')
                if i >= 0:
                        s = s[0:i]
                return s
        
        def JoinComma(l):
       +        for s in l:
       +                typecheck(s, str)
                return ", ".join(l)
        
        def ExceptionDetail():
       t@@ -385,6 +498,8 @@ def IsLocalCL(ui, repo, name):
        
        # Load CL from disk and/or the web.
        def LoadCL(ui, repo, name, web=True):
       +        typecheck(name, str)
       +        set_status("loading CL " + name)
                if not GoodCLName(name):
                        return None, "invalid CL name"
                dir = CodeReviewDir(ui, repo)
       t@@ -400,14 +515,16 @@ def LoadCL(ui, repo, name, web=True):
                else:
                        cl = CL(name)
                if web:
       -                try:
       -                        f = GetSettings(name)
       -                except:
       -                        return None, "cannot load CL %s from code review server: %s" % (name, ExceptionDetail())
       -                if 'reviewers' not in f:
       +                set_status("getting issue metadata from web")
       +                d = JSONGet(ui, "/api/" + name + "?messages=true")
       +                set_status(None)
       +                if d is None:
       +                        return None, "cannot load CL %s from server" % (name,)
       +                if 'owner_email' not in d or 'issue' not in d or str(d['issue']) != name:
                                return None, "malformed response loading CL data from code review server"
       -                cl.reviewer = SplitCommaSpace(f['reviewers'])
       -                cl.cc = SplitCommaSpace(f['cc'])
       +                cl.dict = d
       +                cl.reviewer = d.get('reviewers', [])
       +                cl.cc = d.get('cc', [])
                        if cl.local and cl.copied_from and cl.desc:
                                # local copy of CL written by someone else
                                # and we saved a description.  use that one,
       t@@ -415,11 +532,44 @@ def LoadCL(ui, repo, name, web=True):
                                # before doing hg submit.
                                pass
                        else:
       -                        cl.desc = f['description']
       +                        cl.desc = d.get('description', "")
                        cl.url = server_url_base + name
                        cl.web = True
       +                cl.private = d.get('private', False) != False
       +        set_status("loaded CL " + name)
                return cl, ''
        
       +global_status = None
       +
       +def set_status(s):
       +        # print >>sys.stderr, "\t", time.asctime(), s
       +        global global_status
       +        global_status = s
       +
       +class StatusThread(threading.Thread):
       +        def __init__(self):
       +                threading.Thread.__init__(self)
       +        def run(self):
       +                # pause a reasonable amount of time before
       +                # starting to display status messages, so that
       +                # most hg commands won't ever see them.
       +                time.sleep(30)
       +
       +                # now show status every 15 seconds
       +                while True:
       +                        time.sleep(15 - time.time() % 15)
       +                        s = global_status
       +                        if s is None:
       +                                continue
       +                        if s == "":
       +                                s = "(unknown status)"
       +                        print >>sys.stderr, time.asctime(), s
       +
       +def start_status_thread():
       +        t = StatusThread()
       +        t.setDaemon(True)  # allowed to exit if t is still running
       +        t.start()
       +
        class LoadCLThread(threading.Thread):
                def __init__(self, ui, repo, dir, f, web):
                        threading.Thread.__init__(self)
       t@@ -473,6 +623,7 @@ def RepoDir(ui, repo):
                url = url[5:]
                if url.endswith('/'):
                        url = url[:-1]
       +        typecheck(url, str)
                return url
        
        # Find (or make) code review directory.  On error, ui.warn and return None
       t@@ -487,15 +638,28 @@ def CodeReviewDir(ui, repo):
                        except:
                                ui.warn('cannot mkdir %s: %s\n' % (dir, ExceptionDetail()))
                                return None
       +        typecheck(dir, str)
                return dir
        
       +# Turn leading tabs into spaces, so that the common white space
       +# prefix doesn't get confused when people's editors write out 
       +# some lines with spaces, some with tabs.  Only a heuristic
       +# (some editors don't use 8 spaces either) but a useful one.
       +def TabsToSpaces(line):
       +        i = 0
       +        while i < len(line) and line[i] == '\t':
       +                i += 1
       +        return ' '*(8*i) + line[i:]
       +
        # Strip maximal common leading white space prefix from text
        def StripCommon(text):
       +        typecheck(text, str)
                ws = None
                for line in text.split('\n'):
                        line = line.rstrip()
                        if line == '':
                                continue
       +                line = TabsToSpaces(line)
                        white = line[:len(line)-len(line.lstrip())]
                        if ws == None:
                                ws = white
       t@@ -512,6 +676,7 @@ def StripCommon(text):
                t = ''
                for line in text.split('\n'):
                        line = line.rstrip()
       +                line = TabsToSpaces(line)
                        if line.startswith(ws):
                                line = line[len(ws):]
                        if line == '' and t == '':
       t@@ -519,17 +684,22 @@ def StripCommon(text):
                        t += line + '\n'
                while len(t) >= 2 and t[-2:] == '\n\n':
                        t = t[:-1]
       +        typecheck(t, str)
                return t
        
        # Indent text with indent.
        def Indent(text, indent):
       +        typecheck(text, str)
       +        typecheck(indent, str)
                t = ''
                for line in text.split('\n'):
                        t += indent + line + '\n'
       +        typecheck(t, str)
                return t
        
        # Return the first line of l
        def line1(text):
       +        typecheck(text, str)
                return text.split('\n')[0]
        
        _change_prolog = """# Change list.
       t@@ -548,28 +718,53 @@ def effective_revpair(repo):
                return cmdutil.revpair(repo, None)
        
        # Return list of changed files in repository that match pats.
       -def ChangedFiles(ui, repo, pats, opts):
       -        # Find list of files being operated on.
       +# Warn about patterns that did not match.
       +def matchpats(ui, repo, pats, opts):
                matcher = cmdutil.match(repo, pats, opts)
                node1, node2 = effective_revpair(repo)
       -        modified, added, removed = repo.status(node1, node2, matcher)[:3]
       +        modified, added, removed, deleted, unknown, ignored, clean = repo.status(node1, node2, matcher, ignored=True, clean=True, unknown=True)
       +        return (modified, added, removed, deleted, unknown, ignored, clean)
       +
       +# Return list of changed files in repository that match pats.
       +# The patterns came from the command line, so we warn
       +# if they have no effect or cannot be understood.
       +def ChangedFiles(ui, repo, pats, opts, taken=None):
       +        taken = taken or {}
       +        # Run each pattern separately so that we can warn about
       +        # patterns that didn't do anything useful.
       +        for p in pats:
       +                modified, added, removed, deleted, unknown, ignored, clean = matchpats(ui, repo, [p], opts)
       +                redo = False
       +                for f in unknown:
       +                        promptadd(ui, repo, f)
       +                        redo = True
       +                for f in deleted:
       +                        promptremove(ui, repo, f)
       +                        redo = True
       +                if redo:
       +                        modified, added, removed, deleted, unknown, ignored, clean = matchpats(ui, repo, [p], opts)
       +                for f in modified + added + removed:
       +                        if f in taken:
       +                                ui.warn("warning: %s already in CL %s\n" % (f, taken[f].name))
       +                if not modified and not added and not removed:
       +                        ui.warn("warning: %s did not match any modified files\n" % (p,))
       +
       +        # Again, all at once (eliminates duplicates)
       +        modified, added, removed = matchpats(ui, repo, pats, opts)[:3]
                l = modified + added + removed
                l.sort()
       +        if taken:
       +                l = Sub(l, taken.keys())
                return l
        
        # Return list of changed files in repository that match pats and still exist.
        def ChangedExistingFiles(ui, repo, pats, opts):
       -        matcher = cmdutil.match(repo, pats, opts)
       -        node1, node2 = effective_revpair(repo)
       -        modified, added, _ = repo.status(node1, node2, matcher)[:3]
       +        modified, added = matchpats(ui, repo, pats, opts)[:2]
                l = modified + added
                l.sort()
                return l
        
        # Return list of files claimed by existing CLs
       -def TakenFiles(ui, repo):
       -        return Taken(ui, repo).keys()
       -
        def Taken(ui, repo):
                all = LoadAllCL(ui, repo, web=False)
                taken = {}
       t@@ -580,7 +775,7 @@ def Taken(ui, repo):
        
        # Return list of changed files that are not claimed by other CLs
        def DefaultFiles(ui, repo, pats, opts):
       -        return Sub(ChangedFiles(ui, repo, pats, opts), TakenFiles(ui, repo))
       +        return ChangedFiles(ui, repo, pats, opts, taken=Taken(ui, repo))
        
        def Sub(l1, l2):
                return [l for l in l1 if l not in l2]
       t@@ -600,7 +795,7 @@ def getremote(ui, repo, opts):
                source = hg.parseurl(ui.expandpath("default"), None)[0]
                try:
                        remoteui = hg.remoteui # hg 1.6
       -        except:
       +        except:
                        remoteui = cmdutil.remoteui
                other = hg.repository(remoteui(repo, opts), source)
                if proxy is not None:
       t@@ -611,7 +806,41 @@ def Incoming(ui, repo, opts):
                _, incoming, _ = findcommonincoming(repo, getremote(ui, repo, opts))
                return incoming
        
       +desc_re = '^(.+: |(tag )?(release|weekly)\.|fix build|undo CL)'
       +
       +desc_msg = '''Your CL description appears not to use the standard form.
       +
       +The first line of your change description is conventionally a
       +one-line summary of the change, prefixed by the primary affected package,
       +and is used as the subject for code review mail; the rest of the description
       +elaborates.
       +
       +Examples:
       +
       +        encoding/rot13: new package
       +
       +        math: add IsInf, IsNaN
       +        
       +        net: fix cname in LookupHost
       +
       +        unicode: update to Unicode 5.0.2
       +
       +'''
       +
       +        
       +
       +def promptremove(ui, repo, f):
       +        if promptyesno(ui, "hg remove %s (y/n)?" % (f,)):
       +                if commands.remove(ui, repo, 'path:'+f) != 0:
       +                        ui.warn("error removing %s" % (f,))
       +
       +def promptadd(ui, repo, f):
       +        if promptyesno(ui, "hg add %s (y/n)?" % (f,)):
       +                if commands.add(ui, repo, 'path:'+f) != 0:
       +                        ui.warn("error adding %s" % (f,))
       +
        def EditCL(ui, repo, cl):
       +        set_status(None)        # do not show status
                s = cl.EditorText()
                while True:
                        s = ui.edit(s, ui.username())
       t@@ -620,13 +849,58 @@ def EditCL(ui, repo, cl):
                                if not promptyesno(ui, "error parsing change list: line %d: %s\nre-edit (y/n)?" % (line, err)):
                                        return "change list not modified"
                                continue
       -                cl.desc = clx.desc;
       +                
       +                # Check description.
       +                if clx.desc == '':
       +                        if promptyesno(ui, "change list should have a description\nre-edit (y/n)?"):
       +                                continue
       +                elif re.search('<enter reason for undo>', clx.desc):
       +                        if promptyesno(ui, "change list description omits reason for undo\nre-edit (y/n)?"):
       +                                continue
       +                elif not re.match(desc_re, clx.desc.split('\n')[0]):
       +                        if promptyesno(ui, desc_msg + "re-edit (y/n)?"):
       +                                continue
       +
       +                # Check file list for files that need to be hg added or hg removed
       +                # or simply aren't understood.
       +                pats = ['path:'+f for f in clx.files]
       +                modified, added, removed, deleted, unknown, ignored, clean = matchpats(ui, repo, pats, {})
       +                files = []
       +                for f in clx.files:
       +                        if f in modified or f in added or f in removed:
       +                                files.append(f)
       +                                continue
       +                        if f in deleted:
       +                                promptremove(ui, repo, f)
       +                                files.append(f)
       +                                continue
       +                        if f in unknown:
       +                                promptadd(ui, repo, f)
       +                                files.append(f)
       +                                continue
       +                        if f in ignored:
       +                                ui.warn("error: %s is excluded by .hgignore; omitting\n" % (f,))
       +                                continue
       +                        if f in clean:
       +                                ui.warn("warning: %s is listed in the CL but unchanged\n" % (f,))
       +                                files.append(f)
       +                                continue
       +                        p = repo.root + '/' + f
       +                        if os.path.isfile(p):
       +                                ui.warn("warning: %s is a file but not known to hg\n" % (f,))
       +                                files.append(f)
       +                                continue
       +                        if os.path.isdir(p):
       +                                ui.warn("error: %s is a directory, not a file; omitting\n" % (f,))
       +                                continue
       +                        ui.warn("error: %s does not exist; omitting\n" % (f,))
       +                clx.files = files
       +
       +                cl.desc = clx.desc
                        cl.reviewer = clx.reviewer
                        cl.cc = clx.cc
                        cl.files = clx.files
       -                if cl.desc == '':
       -                        if promptyesno(ui, "change list should have description\nre-edit (y/n)?"):
       -                                continue
       +                cl.private = clx.private
                        break
                return ""
        
       t@@ -645,7 +919,7 @@ def CommandLineCL(ui, repo, pats, opts, defaultcc=None):
                else:
                        cl = CL("new")
                        cl.local = True
       -                cl.files = Sub(ChangedFiles(ui, repo, pats, opts), TakenFiles(ui, repo))
       +                cl.files = ChangedFiles(ui, repo, pats, opts, taken=Taken(ui, repo))
                        if not cl.files:
                                return None, "no files changed"
                if opts.get('reviewer'):
       t@@ -667,10 +941,11 @@ def CommandLineCL(ui, repo, pats, opts, defaultcc=None):
        # which expands the syntax @clnumber to mean the files
        # in that CL.
        original_match = None
       -def ReplacementForCmdutilMatch(repo, pats=[], opts={}, globbed=False, default='relpath'):
       +def ReplacementForCmdutilMatch(repo, pats=None, opts=None, globbed=False, default='relpath'):
                taken = []
                files = []
       -        pats = pats or []
       +        pats = pats or []
       +        opts = opts or {}
                for p in pats:
                        if p.startswith('@'):
                                taken.append(p)
       t@@ -680,7 +955,7 @@ def ReplacementForCmdutilMatch(repo, pats=[], opts={}, globbed=False, default='r
                                cl, err = LoadCL(repo.ui, repo, clname, web=False)
                                if err != '':
                                        raise util.Abort("loading CL " + clname + ": " + err)
       -                        if cl.files == None:
       +                        if not cl.files:
                                        raise util.Abort("no files in CL " + clname)
                                files = Add(files, cl.files)
                pats = Sub(pats, taken) + ['path:'+f for f in files]
       t@@ -692,8 +967,13 @@ def RelativePath(path, cwd):
                        return path[n+1:]
                return path
        
       +def CheckFormat(ui, repo, files, just_warn=False):
       +        set_status("running gofmt")
       +        CheckGofmt(ui, repo, files, just_warn)
       +        CheckTabfmt(ui, repo, files, just_warn)
       +
        # Check that gofmt run on the list of files does not change them
       -def CheckGofmt(ui, repo, files, just_warn=False):
       +def CheckGofmt(ui, repo, files, just_warn):
                files = [f for f in files if (f.startswith('src/') or f.startswith('test/bench/')) and f.endswith('.go')]
                if not files:
                        return
       t@@ -703,13 +983,14 @@ def CheckGofmt(ui, repo, files, just_warn=False):
                if not files:
                        return
                try:
       -                cmd = subprocess.Popen(["gofmt", "-l"] + files, shell=False, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True)
       +                cmd = subprocess.Popen(["gofmt", "-l"] + files, shell=False, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=sys.platform != "win32")
                        cmd.stdin.close()
                except:
                        raise util.Abort("gofmt: " + ExceptionDetail())
                data = cmd.stdout.read()
                errors = cmd.stderr.read()
                cmd.wait()
       +        set_status("done with gofmt")
                if len(errors) > 0:
                        ui.warn("gofmt errors:\n" + errors.rstrip() + "\n")
                        return
       t@@ -721,6 +1002,35 @@ def CheckGofmt(ui, repo, files, just_warn=False):
                                raise util.Abort(msg)
                return
        
       +# Check that *.[chys] files indent using tabs.
       +def CheckTabfmt(ui, repo, files, just_warn):
       +        files = [f for f in files if f.startswith('src/') and re.search(r"\.[chys]$", f)]
       +        if not files:
       +                return
       +        cwd = os.getcwd()
       +        files = [RelativePath(repo.root + '/' + f, cwd) for f in files]
       +        files = [f for f in files if os.access(f, 0)]
       +        badfiles = []
       +        for f in files:
       +                try:
       +                        for line in open(f, 'r'):
       +                                # Four leading spaces is enough to complain about,
       +                                # except that some Plan 9 code uses four spaces as the label indent,
       +                                # so allow that.
       +                                if line.startswith('    ') and not re.match('    [A-Za-z0-9_]+:', line):
       +                                        badfiles.append(f)
       +                                        break
       +                except:
       +                        # ignore cannot open file, etc.
       +                        pass
       +        if len(badfiles) > 0:
       +                msg = "these files use spaces for indentation (use tabs instead):\n\t" + "\n\t".join(badfiles)
       +                if just_warn:
       +                        ui.warn("warning: " + msg + "\n")
       +                else:
       +                        raise util.Abort(msg)
       +        return
       +
        #######################################################################
        # Mercurial commands
        
       t@@ -754,6 +1064,9 @@ def change(ui, repo, *pats, **opts):
                before running hg change -d 123456.
                """
        
       +        if missing_codereview:
       +                return missing_codereview
       +        
                dirty = {}
                if len(pats) > 0 and GoodCLName(pats[0]):
                        name = pats[0]
       t@@ -766,12 +1079,12 @@ def change(ui, repo, *pats, **opts):
                        if not cl.local and (opts["stdin"] or not opts["stdout"]):
                                return "cannot change non-local CL " + name
                else:
       +                if repo[None].branch() != "default":
       +                        return "cannot run hg change outside default branch"
                        name = "new"
                        cl = CL("new")
                        dirty[cl] = True
       -                files = ChangedFiles(ui, repo, pats, opts)
       -                taken = TakenFiles(ui, repo)
       -                files = Sub(files, taken)
       +                files = ChangedFiles(ui, repo, pats, opts, taken=Taken(ui, repo))
        
                if opts["delete"] or opts["deletelocal"]:
                        if opts["delete"] and opts["deletelocal"]:
       t@@ -788,8 +1101,8 @@ def change(ui, repo, *pats, **opts):
                        if opts["delete"]:
                                if cl.copied_from:
                                        return "original author must delete CL; hg change -D will remove locally"
       -                        PostMessage(ui, cl.name, "*** Abandoned ***")
       -                        EditDesc(cl.name, closed="checked")
       +                        PostMessage(ui, cl.name, "*** Abandoned ***", send_mail=cl.mailed)
       +                        EditDesc(cl.name, closed=True, private=cl.private)
                        cl.Delete(ui, repo)
                        return
        
       t@@ -810,6 +1123,9 @@ def change(ui, repo, *pats, **opts):
                        if clx.files is not None:
                                cl.files = clx.files
                                dirty[cl] = True
       +                if clx.private != cl.private:
       +                        cl.private = clx.private
       +                        dirty[cl] = True
        
                if not opts["stdin"] and not opts["stdout"]:
                        if name == "new":
       t@@ -820,10 +1136,15 @@ def change(ui, repo, *pats, **opts):
                        dirty[cl] = True
        
                for d, _ in dirty.items():
       +                name = d.name
                        d.Flush(ui, repo)
       +                if name == "new":
       +                        d.Upload(ui, repo, quiet=True)
        
                if opts["stdout"]:
                        ui.write(cl.EditorText())
       +        elif opts["pending"]:
       +                ui.write(cl.PendingText())
                elif name == "new":
                        if ui.quiet:
                                ui.write(cl.name)
       t@@ -837,6 +1158,9 @@ def code_login(ui, repo, **opts):
                Logs in to the code review server, saving a cookie in
                a file in your home directory.
                """
       +        if missing_codereview:
       +                return missing_codereview
       +
                MySend(None)
        
        def clpatch(ui, repo, clname, **opts):
       t@@ -849,33 +1173,279 @@ def clpatch(ui, repo, clname, **opts):
                Submitting an imported patch will keep the original author's
                name as the Author: line but add your own name to a Committer: line.
                """
       -        cl, patch, err = DownloadCL(ui, repo, clname)
       +        if repo[None].branch() != "default":
       +                return "cannot run hg clpatch outside default branch"
       +        return clpatch_or_undo(ui, repo, clname, opts, mode="clpatch")
       +
       +def undo(ui, repo, clname, **opts):
       +        """undo the effect of a CL
       +        
       +        Creates a new CL that undoes an earlier CL.
       +        After creating the CL, opens the CL text for editing so that
       +        you can add the reason for the undo to the description.
       +        """
       +        if repo[None].branch() != "default":
       +                return "cannot run hg undo outside default branch"
       +        return clpatch_or_undo(ui, repo, clname, opts, mode="undo")
       +
       +def release_apply(ui, repo, clname, **opts):
       +        """apply a CL to the release branch
       +
       +        Creates a new CL copying a previously committed change
       +        from the main branch to the release branch.
       +        The current client must either be clean or already be in
       +        the release branch.
       +        
       +        The release branch must be created by starting with a
       +        clean client, disabling the code review plugin, and running:
       +        
       +                hg update weekly.YYYY-MM-DD
       +                hg branch release-branch.rNN
       +                hg commit -m 'create release-branch.rNN'
       +                hg push --new-branch
       +        
       +        Then re-enable the code review plugin.
       +        
       +        People can test the release branch by running
       +        
       +                hg update release-branch.rNN
       +        
       +        in a clean client.  To return to the normal tree,
       +        
       +                hg update default
       +        
       +        Move changes since the weekly into the release branch 
       +        using hg release-apply followed by the usual code review
       +        process and hg submit.
       +
       +        When it comes time to tag the release, record the
       +        final long-form tag of the release-branch.rNN
       +        in the *default* branch's .hgtags file.  That is, run
       +        
       +                hg update default
       +        
       +        and then edit .hgtags as you would for a weekly.
       +                
       +        """
       +        c = repo[None]
       +        if not releaseBranch:
       +                return "no active release branches"
       +        if c.branch() != releaseBranch:
       +                if c.modified() or c.added() or c.removed():
       +                        raise util.Abort("uncommitted local changes - cannot switch branches")
       +                err = hg.clean(repo, releaseBranch)
       +                if err:
       +                        return err
       +        try:
       +                err = clpatch_or_undo(ui, repo, clname, opts, mode="backport")
       +                if err:
       +                        raise util.Abort(err)
       +        except Exception, e:
       +                hg.clean(repo, "default")
       +                raise e
       +        return None
       +
       +def rev2clname(rev):
       +        # Extract CL name from revision description.
       +        # The last line in the description that is a codereview URL is the real one.
       +        # Earlier lines might be part of the user-written description.
       +        all = re.findall('(?m)^http://codereview.appspot.com/([0-9]+)$', rev.description())
       +        if len(all) > 0:
       +                return all[-1]
       +        return ""
       +
       +undoHeader = """undo CL %s / %s
       +
       +<enter reason for undo>
       +
       +««« original CL description
       +"""
       +
       +undoFooter = """
       +»»»
       +"""
       +
       +backportHeader = """[%s] %s
       +
       +««« CL %s / %s
       +"""
       +
       +backportFooter = """
       +»»»
       +"""
       +
       +# Implementation of clpatch/undo.
       +def clpatch_or_undo(ui, repo, clname, opts, mode):
       +        if missing_codereview:
       +                return missing_codereview
       +
       +        if mode == "undo" or mode == "backport":
       +                if hgversion < '1.4':
       +                        # Don't have cmdutil.match (see implementation of sync command).
       +                        return "hg is too old to run hg %s - update to 1.4 or newer" % mode
       +
       +                # Find revision in Mercurial repository.
       +                # Assume CL number is 7+ decimal digits.
       +                # Otherwise is either change log sequence number (fewer decimal digits),
       +                # hexadecimal hash, or tag name.
       +                # Mercurial will fall over long before the change log
       +                # sequence numbers get to be 7 digits long.
       +                if re.match('^[0-9]{7,}$', clname):
       +                        found = False
       +                        matchfn = cmdutil.match(repo, [], {'rev': None})
       +                        def prep(ctx, fns):
       +                                pass
       +                        for ctx in cmdutil.walkchangerevs(repo, matchfn, {'rev': None}, prep):
       +                                rev = repo[ctx.rev()]
       +                                # Last line with a code review URL is the actual review URL.
       +                                # Earlier ones might be part of the CL description.
       +                                n = rev2clname(rev)
       +                                if n == clname:
       +                                        found = True
       +                                        break
       +                        if not found:
       +                                return "cannot find CL %s in local repository" % clname
       +                else:
       +                        rev = repo[clname]
       +                        if not rev:
       +                                return "unknown revision %s" % clname
       +                        clname = rev2clname(rev)
       +                        if clname == "":
       +                                return "cannot find CL name in revision description"
       +                
       +                # Create fresh CL and start with patch that would reverse the change.
       +                vers = short(rev.node())
       +                cl = CL("new")
       +                desc = str(rev.description())
       +                if mode == "undo":
       +                        cl.desc = (undoHeader % (clname, vers)) + desc + undoFooter
       +                else:
       +                        cl.desc = (backportHeader % (releaseBranch, line1(desc), clname, vers)) + desc + undoFooter
       +                v1 = vers
       +                v0 = short(rev.parents()[0].node())
       +                if mode == "undo":
       +                        arg = v1 + ":" + v0
       +                else:
       +                        vers = v0
       +                        arg = v0 + ":" + v1
       +                patch = RunShell(["hg", "diff", "--git", "-r", arg])
       +
       +        else:  # clpatch
       +                cl, vers, patch, err = DownloadCL(ui, repo, clname)
       +                if err != "":
       +                        return err
       +                if patch == emptydiff:
       +                        return "codereview issue %s has no diff" % clname
       +
       +        # find current hg version (hg identify)
       +        ctx = repo[None]
       +        parents = ctx.parents()
       +        id = '+'.join([short(p.node()) for p in parents])
       +
       +        # if version does not match the patch version,
       +        # try to update the patch line numbers.
       +        if vers != "" and id != vers:
       +                # "vers in repo" gives the wrong answer
       +                # on some versions of Mercurial.  Instead, do the actual
       +                # lookup and catch the exception.
       +                try:
       +                        repo[vers].description()
       +                except:
       +                        return "local repository is out of date; sync to get %s" % (vers)
       +                patch1, err = portPatch(repo, patch, vers, id)
       +                if err != "":
       +                        if not opts["ignore_hgpatch_failure"]:
       +                                return "codereview issue %s is out of date: %s (%s->%s)" % (clname, err, vers, id)
       +                else:
       +                        patch = patch1
                argv = ["hgpatch"]
       -        if opts["fuzzy"]:
       -                argv += ["--fuzzy"]
       -        if opts["no_incoming"]:
       +        if opts["no_incoming"] or mode == "backport":
                        argv += ["--checksync=false"]
       -        if err != "":
       -                return err
                try:
       -                cmd = subprocess.Popen(argv, shell=False, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=None, close_fds=True)
       +                cmd = subprocess.Popen(argv, shell=False, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=None, close_fds=sys.platform != "win32")
                except:
                        return "hgpatch: " + ExceptionDetail()
       -        if os.fork() == 0:
       -                cmd.stdin.write(patch)
       -                os._exit(0)
       -        cmd.stdin.close()
       -        out = cmd.stdout.read()
       -        if cmd.wait() != 0 and not opts["ignore_hgpatch_failure"]:
       +
       +        out, err = cmd.communicate(patch)
       +        if cmd.returncode != 0 and not opts["ignore_hgpatch_failure"]:
                        return "hgpatch failed"
                cl.local = True
                cl.files = out.strip().split()
       +        if not cl.files and not opts["ignore_hgpatch_failure"]:
       +                return "codereview issue %s has no changed files" % clname
                files = ChangedFiles(ui, repo, [], opts)
                extra = Sub(cl.files, files)
                if extra:
                        ui.warn("warning: these files were listed in the patch but not changed:\n\t" + "\n\t".join(extra) + "\n")
                cl.Flush(ui, repo)
       -        ui.write(cl.PendingText() + "\n")
       +        if mode == "undo":
       +                err = EditCL(ui, repo, cl)
       +                if err != "":
       +                        return "CL created, but error editing: " + err
       +                cl.Flush(ui, repo)
       +        else:
       +                ui.write(cl.PendingText() + "\n")
       +
       +# portPatch rewrites patch from being a patch against
       +# oldver to being a patch against newver.
       +def portPatch(repo, patch, oldver, newver):
       +        lines = patch.splitlines(True) # True = keep \n
       +        delta = None
       +        for i in range(len(lines)):
       +                line = lines[i]
       +                if line.startswith('--- a/'):
       +                        file = line[6:-1]
       +                        delta = fileDeltas(repo, file, oldver, newver)
       +                if not delta or not line.startswith('@@ '):
       +                        continue
       +                # @@ -x,y +z,w @@ means the patch chunk replaces
       +                # the original file's line numbers x up to x+y with the
       +                # line numbers z up to z+w in the new file.
       +                # Find the delta from x in the original to the same
       +                # line in the current version and add that delta to both
       +                # x and z.
       +                m = re.match('@@ -([0-9]+),([0-9]+) \+([0-9]+),([0-9]+) @@', line)
       +                if not m:
       +                        return None, "error parsing patch line numbers"
       +                n1, len1, n2, len2 = int(m.group(1)), int(m.group(2)), int(m.group(3)), int(m.group(4))
       +                d, err = lineDelta(delta, n1, len1)
       +                if err != "":
       +                        return "", err
       +                n1 += d
       +                n2 += d
       +                lines[i] = "@@ -%d,%d +%d,%d @@\n" % (n1, len1, n2, len2)
       +                
       +        newpatch = ''.join(lines)
       +        return newpatch, ""
       +
       +# fileDelta returns the line number deltas for the given file's
       +# changes from oldver to newver.
       +# The deltas are a list of (n, len, newdelta) triples that say
       +# lines [n, n+len) were modified, and after that range the
       +# line numbers are +newdelta from what they were before.
       +def fileDeltas(repo, file, oldver, newver):
       +        cmd = ["hg", "diff", "--git", "-r", oldver + ":" + newver, "path:" + file]
       +        data = RunShell(cmd, silent_ok=True)
       +        deltas = []
       +        for line in data.splitlines():
       +                m = re.match('@@ -([0-9]+),([0-9]+) \+([0-9]+),([0-9]+) @@', line)
       +                if not m:
       +                        continue
       +                n1, len1, n2, len2 = int(m.group(1)), int(m.group(2)), int(m.group(3)), int(m.group(4))
       +                deltas.append((n1, len1, n2+len2-(n1+len1)))
       +        return deltas
       +
       +# lineDelta finds the appropriate line number delta to apply to the lines [n, n+len).
       +# It returns an error if those lines were rewritten by the patch.
       +def lineDelta(deltas, n, len):
       +        d = 0
       +        for (old, oldlen, newdelta) in deltas:
       +                if old >= n+len:
       +                        break
       +                if old+len > n:
       +                        return 0, "patch and recent changes conflict"
       +                d = newdelta
       +        return d, ""
        
        def download(ui, repo, clname, **opts):
                """download a change from the code review server
       t@@ -883,7 +1453,10 @@ def download(ui, repo, clname, **opts):
                Download prints a description of the given change list
                followed by its diff, downloaded from the code review server.
                """
       -        cl, patch, err = DownloadCL(ui, repo, clname)
       +        if missing_codereview:
       +                return missing_codereview
       +
       +        cl, vers, patch, err = DownloadCL(ui, repo, clname)
                if err != "":
                        return err
                ui.write(cl.EditorText() + "\n")
       t@@ -898,6 +1471,9 @@ def file(ui, repo, clname, pat, *pats, **opts):
                The -d option only removes files from the change list.
                It does not edit them or remove them from the repository.
                """
       +        if missing_codereview:
       +                return missing_codereview
       +
                pats = tuple([pat] + list(pats))
                if not GoodCLName(clname):
                        return "invalid CL name " + clname
       t@@ -955,6 +1531,9 @@ def gofmt(ui, repo, *pats, **opts):
                Applies gofmt to the modified files in the repository that match
                the given patterns.
                """
       +        if missing_codereview:
       +                return missing_codereview
       +
                files = ChangedExistingFiles(ui, repo, pats, opts)
                files = [f for f in files if f.endswith(".go")]
                if not files:
       t@@ -979,13 +1558,16 @@ def mail(ui, repo, *pats, **opts):
                Uploads a patch to the code review server and then sends mail
                to the reviewer and CC list asking for a review.
                """
       +        if missing_codereview:
       +                return missing_codereview
       +
                cl, err = CommandLineCL(ui, repo, pats, opts, defaultcc=defaultcc)
                if err != "":
                        return err
                cl.Upload(ui, repo, gofmt_just_warn=True)
                if not cl.reviewer:
                        # If no reviewer is listed, assign the review to defaultcc.
       -                # This makes sure that it appears in the
       +                # This makes sure that it appears in the 
                        # codereview.appspot.com/user/defaultcc
                        # page, so that it doesn't get dropped on the floor.
                        if not defaultcc:
       t@@ -993,17 +1575,20 @@ def mail(ui, repo, *pats, **opts):
                        cl.cc = Sub(cl.cc, defaultcc)
                        cl.reviewer = defaultcc
                        cl.Flush(ui, repo)
       -        cl.Mail(ui, repo)
        
       -def nocommit(ui, repo, *pats, **opts):
       -        """(disabled when using this extension)"""
       -        return "The codereview extension is enabled; do not use commit."
       +        if cl.files == []:
       +                return "no changed files, not sending mail"
       +
       +        cl.Mail(ui, repo)                
        
        def pending(ui, repo, *pats, **opts):
                """show pending changes
        
                Lists pending changes followed by a list of unassigned but modified files.
                """
       +        if missing_codereview:
       +                return missing_codereview
       +
                m = LoadAllCL(ui, repo, web=True)
                names = m.keys()
                names.sort()
       t@@ -1021,29 +1606,32 @@ def pending(ui, repo, *pats, **opts):
        def reposetup(ui, repo):
                global original_match
                if original_match is None:
       +                start_status_thread()
                        original_match = cmdutil.match
                        cmdutil.match = ReplacementForCmdutilMatch
                        RietveldSetup(ui, repo)
        
        def CheckContributor(ui, repo, user=None):
       -        if not user:
       -                user = ui.config("ui", "username")
       -                if not user:
       -                        raise util.Abort("[ui] username is not configured in .hgrc")
       -        _, userline = FindContributor(ui, repo, user, warn=False)
       +        set_status("checking CONTRIBUTORS file")
       +        user, userline = FindContributor(ui, repo, user, warn=False)
                if not userline:
                        raise util.Abort("cannot find %s in CONTRIBUTORS" % (user,))
                return userline
        
       -def FindContributor(ui, repo, user, warn=True):
       +def FindContributor(ui, repo, user=None, warn=True):
       +        if not user:
       +                user = ui.config("ui", "username")
       +                if not user:
       +                        raise util.Abort("[ui] username is not configured in .hgrc")
       +        user = user.lower()
                m = re.match(r".*<(.*)>", user)
                if m:
       -                user = m.group(1).lower()
       +                user = m.group(1)
        
                if user not in contributors:
                        if warn:
                                ui.warn("warning: cannot find %s in CONTRIBUTORS\n" % (user,))
       -                return None, None
       +                return user, None
                
                user, email = contributors[user]
                return email, "%s <%s>" % (user, email)
       t@@ -1054,6 +1642,12 @@ def submit(ui, repo, *pats, **opts):
                Submits change to remote repository.
                Bails out if the local repository is not in sync with the remote one.
                """
       +        if missing_codereview:
       +                return missing_codereview
       +
       +        # We already called this on startup but sometimes Mercurial forgets.
       +        set_mercurial_encoding_to_utf8()
       +
                repo.ui.quiet = True
                if not opts["no_incoming"] and Incoming(ui, repo, opts):
                        return "local repository out of date; must sync before submit"
       t@@ -1066,6 +1660,7 @@ def submit(ui, repo, *pats, **opts):
                if cl.copied_from:
                        user = cl.copied_from
                userline = CheckContributor(ui, repo, user)
       +        typecheck(userline, str)
        
                about = ""
                if cl.reviewer:
       t@@ -1089,12 +1684,13 @@ def submit(ui, repo, *pats, **opts):
        
                # check gofmt for real; allowed upload to warn in order to save CL.
                cl.Flush(ui, repo)
       -        CheckGofmt(ui, repo, cl.files)
       +        CheckFormat(ui, repo, cl.files)
        
                about += "%s%s\n" % (server_url_base, cl.name)
        
                if cl.copied_from:
                        about += "\nCommitter: " + CheckContributor(ui, repo, None) + "\n"
       +        typecheck(about, str)
        
                if not cl.mailed and not cl.copied_from:                # in case this is TBR
                        cl.Mail(ui, repo)
       t@@ -1103,7 +1699,9 @@ def submit(ui, repo, *pats, **opts):
                date = opts.get('date')
                if date:
                        opts['date'] = util.parsedate(date)
       +                typecheck(opts['date'], str)
                opts['message'] = cl.desc.rstrip() + "\n\n" + about
       +        typecheck(opts['message'], str)
        
                if opts['dryrun']:
                        print "NOT SUBMITTING:"
       t@@ -1115,7 +1713,7 @@ def submit(ui, repo, *pats, **opts):
                        return "dry run; not submitted"
        
                m = match.exact(repo.root, repo.getcwd(), cl.files)
       -        node = repo.commit(opts['message'], userline, opts.get('date'), m)
       +        node = repo.commit(ustr(opts['message']), ustr(userline), opts.get('date'), m)
                if not node:
                        return "nothing changed"
        
       t@@ -1139,13 +1737,13 @@ def submit(ui, repo, *pats, **opts):
                        if r == 0:
                                raise util.Abort("local repository out of date; must sync before submit")
                except:
       -                repo.rollback()
       +                real_rollback()
                        raise
        
                # we're committed. upload final patch, close review, add commit message
                changeURL = short(node)
                url = other.url()
       -        m = re.match("^https?://([^@/]+@)?([^.]+)\.googlecode\.com/hg/", url)
       +        m = re.match("^https?://([^@/]+@)?([^.]+)\.googlecode\.com/hg/?", url)
                if m:
                        changeURL = "http://code.google.com/p/%s/source/detail?r=%s" % (m.group(2), changeURL)
                else:
       t@@ -1157,8 +1755,16 @@ def submit(ui, repo, *pats, **opts):
                PostMessage(ui, cl.name, pmsg, reviewers="", cc=JoinComma(cl.reviewer+cl.cc))
        
                if not cl.copied_from:
       -                EditDesc(cl.name, closed="checked")
       +                EditDesc(cl.name, closed=True, private=cl.private)
                cl.Delete(ui, repo)
       +        
       +        c = repo[None]
       +        if c.branch() == releaseBranch and not c.modified() and not c.added() and not c.removed():
       +                ui.write("switching from %s to default branch.\n" % releaseBranch)
       +                err = hg.clean(repo, "default")
       +                if err:
       +                        return err
       +        return None
        
        def sync(ui, repo, **opts):
                """synchronize with remote repository
       t@@ -1166,6 +1772,9 @@ def sync(ui, repo, **opts):
                Incorporates recent changes from the remote repository
                into the local repository.
                """
       +        if missing_codereview:
       +                return missing_codereview
       +
                if not opts["local"]:
                        ui.status = sync_note
                        ui.note = sync_note
       t@@ -1174,7 +1783,7 @@ def sync(ui, repo, **opts):
                        err = commands.postincoming(ui, repo, modheads, True, "tip")
                        if err:
                                return err
       -        commands.update(ui, repo)
       +        commands.update(ui, repo, rev="default")
                sync_changes(ui, repo)
        
        def sync_note(msg):
       t@@ -1204,7 +1813,7 @@ def sync_changes(ui, repo):
                                                ui.warn("loading CL %s: %s\n" % (clname, err))
                                                continue
                                        if not cl.copied_from:
       -                                        EditDesc(cl.name, closed="checked")
       +                                        EditDesc(cl.name, closed=True, private=cl.private)
                                        cl.Delete(ui, repo)
        
                if hgversion < '1.4':
       t@@ -1237,18 +1846,20 @@ def sync_changes(ui, repo):
                                cl.files = Sub(cl.files, extra)
                                cl.Flush(ui, repo)
                        if not cl.files:
       -                        ui.warn("CL %s has no files; suggest hg change -d %s\n" % (cl.name, cl.name))
       +                        if not cl.copied_from:
       +                                ui.warn("CL %s has no files; delete (abandon) with hg change -d %s\n" % (cl.name, cl.name))
       +                        else:
       +                                ui.warn("CL %s has no files; delete locally with hg change -D %s\n" % (cl.name, cl.name))
                return
        
       -def uisetup(ui):
       -        if "^commit|ci" in commands.table:
       -                commands.table["^commit|ci"] = (nocommit, [], "")
       -
        def upload(ui, repo, name, **opts):
                """upload diffs to the code review server
        
                Uploads the current modifications for a given change to the server.
                """
       +        if missing_codereview:
       +                return missing_codereview
       +
                repo.ui.quiet = True
                cl, err = LoadCL(ui, repo, name, web=True)
                if err != "":
       t@@ -1276,6 +1887,7 @@ cmdtable = {
                                ('D', 'deletelocal', None, 'delete locally, but do not change CL on server'),
                                ('i', 'stdin', None, 'read change list from standard input'),
                                ('o', 'stdout', None, 'print change list to standard output'),
       +                        ('p', 'pending', None, 'print pending summary to standard output'),
                        ],
                        "[-d | -D] [-i] [-o] change# or FILE ..."
                ),
       t@@ -1284,7 +1896,6 @@ cmdtable = {
                        [
                                ('', 'ignore_hgpatch_failure', None, 'create CL metadata even if hgpatch fails'),
                                ('', 'no_incoming', None, 'disable check for incoming changes'),
       -                        ('', 'fuzzy', None, 'attempt to adjust patch line numbers'),
                        ],
                        "change#"
                ),
       t@@ -1296,11 +1907,6 @@ cmdtable = {
                        [],
                        "",
                ),
       -        "commit|ci": (
       -                nocommit,
       -                [],
       -                "",
       -        ),
                "^download": (
                        download,
                        [],
       t@@ -1331,6 +1937,15 @@ cmdtable = {
                        ] + commands.walkopts,
                        "[-r reviewer] [--cc cc] [change# | file ...]"
                ),
       +        "^release-apply": (
       +                release_apply,
       +                [
       +                        ('', 'ignore_hgpatch_failure', None, 'create CL metadata even if hgpatch fails'),
       +                        ('', 'no_incoming', None, 'disable check for incoming changes'),
       +                ],
       +                "change#"
       +        ),
       +        # TODO: release-start, release-tag, weekly-tag
                "^submit": (
                        submit,
                        review_opts + [
       t@@ -1346,6 +1961,14 @@ cmdtable = {
                        ],
                        "[--local]",
                ),
       +        "^undo": (
       +                undo,
       +                [
       +                        ('', 'ignore_hgpatch_failure', None, 'create CL metadata even if hgpatch fails'),
       +                        ('', 'no_incoming', None, 'disable check for incoming changes'),
       +                ],
       +                "change#"
       +        ),
                "^upload": (
                        upload,
                        [],
       t@@ -1398,189 +2021,196 @@ class FormParser(HTMLParser):
                                self.handle_data("&" + name + ";")
                def handle_data(self, data):
                        if self.curdata is not None:
       -                        self.curdata += data.decode("utf-8").encode("utf-8")
       +                        self.curdata += data
        
       -# XML parser
       -def XMLGet(ui, path):
       +def JSONGet(ui, path):
                try:
       -                data = MySend(path, force_auth=False);
       +                data = MySend(path, force_auth=False)
       +                typecheck(data, str)
       +                d = fix_json(json.loads(data))
                except:
       -                ui.warn("XMLGet %s: %s\n" % (path, ExceptionDetail()))
       +                ui.warn("JSONGet %s: %s\n" % (path, ExceptionDetail()))
                        return None
       -        return ET.XML(data)
       +        return d
       +
       +# Clean up json parser output to match our expectations:
       +#   * all strings are UTF-8-encoded str, not unicode.
       +#   * missing fields are missing, not None,
       +#     so that d.get("foo", defaultvalue) works.
       +def fix_json(x):
       +        if type(x) in [str, int, float, bool, type(None)]:
       +                pass
       +        elif type(x) is unicode:
       +                x = x.encode("utf-8")
       +        elif type(x) is list:
       +                for i in range(len(x)):
       +                        x[i] = fix_json(x[i])
       +        elif type(x) is dict:
       +                todel = []
       +                for k in x:
       +                        if x[k] is None:
       +                                todel.append(k)
       +                        else:
       +                                x[k] = fix_json(x[k])
       +                for k in todel:
       +                        del x[k]
       +        else:
       +                raise util.Abort("unknown type " + str(type(x)) + " in fix_json")
       +        if type(x) is str:
       +                x = x.replace('\r\n', '\n')
       +        return x
        
        def IsRietveldSubmitted(ui, clname, hex):
       -        feed = XMLGet(ui, "/rss/issue/" + clname)
       -        if feed is None:
       +        dict = JSONGet(ui, "/api/" + clname + "?messages=true")
       +        if dict is None:
                        return False
       -        for sum in feed.findall("{http://www.w3.org/2005/Atom}entry/{http://www.w3.org/2005/Atom}summary"):
       -                text = sum.findtext("", None).strip()
       +        for msg in dict.get("messages", []):
       +                text = msg.get("text", "")
                        m = re.match('\*\*\* Submitted as [^*]*?([0-9a-f]+) \*\*\*', text)
                        if m is not None and len(m.group(1)) >= 8 and hex.startswith(m.group(1)):
                                return True
                return False
        
       +def IsRietveldMailed(cl):
       +        for msg in cl.dict.get("messages", []):
       +                if msg.get("text", "").find("I'd like you to review this change") >= 0:
       +                        return True
       +        return False
       +
        def DownloadCL(ui, repo, clname):
       -        cl, err = LoadCL(ui, repo, clname)
       +        set_status("downloading CL " + clname)
       +        cl, err = LoadCL(ui, repo, clname, web=True)
                if err != "":
       -                return None, None, "error loading CL %s: %s" % (clname, ExceptionDetail())
       -
       -        # Grab RSS feed to learn about CL
       -        feed = XMLGet(ui, "/rss/issue/" + clname)
       -        if feed is None:
       -                return None, None, "cannot download CL"
       +                return None, None, None, "error loading CL %s: %s" % (clname, err)
        
                # Find most recent diff
       -        diff = None
       -        prefix = 'http://' + server + '/'
       -        for link in feed.findall("{http://www.w3.org/2005/Atom}entry/{http://www.w3.org/2005/Atom}link"):
       -                if link.get('rel') != 'alternate':
       -                        continue
       -                text = link.get('href')
       -                if not text.startswith(prefix) or not text.endswith('.diff'):
       -                        continue
       -                diff = text[len(prefix)-1:]
       -        if diff is None:
       -                return None, None, "CL has no diff"
       -        diffdata = MySend(diff, force_auth=False)
       -
       -        # Find author - first entry will be author who created CL.
       -        nick = None
       -        for author in feed.findall("{http://www.w3.org/2005/Atom}entry/{http://www.w3.org/2005/Atom}author/{http://www.w3.org/2005/Atom}name"):
       -                nick = author.findtext("", None).strip()
       -                break
       -        if not nick:
       -                return None, None, "CL has no author"
       -
       -        # The author is just a nickname: get the real email address.
       -        try:
       -                # want URL-encoded nick, but without a=, and rietveld rejects + for %20.
       -                url = "/user_popup/" + urllib.urlencode({"a": nick})[2:].replace("+", "%20")
       -                data = MySend(url, force_auth=False)
       -        except:
       -                ui.warn("error looking up %s: %s\n" % (nick, ExceptionDetail()))
       -                cl.copied_from = nick+"@needtofix"
       -                return cl, diffdata, ""
       -        match = re.match(r"<b>(.*) \((.*)\)</b>", data)
       -        if not match:
       -                return None, None, "error looking up %s: cannot parse result %s" % (nick, repr(data))
       -        if match.group(1) != nick and match.group(2) != nick:
       -                return None, None, "error looking up %s: got info for %s, %s" % (nick, match.group(1), match.group(2))
       -        email = match.group(1)
       +        diffs = cl.dict.get("patchsets", [])
       +        if not diffs:
       +                return None, None, None, "CL has no patch sets"
       +        patchid = diffs[-1]
       +
       +        patchset = JSONGet(ui, "/api/" + clname + "/" + str(patchid))
       +        if patchset is None:
       +                return None, None, None, "error loading CL patchset %s/%d" % (clname, patchid)
       +        if patchset.get("patchset", 0) != patchid:
       +                return None, None, None, "malformed patchset information"
       +        
       +        vers = ""
       +        msg = patchset.get("message", "").split()
       +        if len(msg) >= 3 and msg[0] == "diff" and msg[1] == "-r":
       +                vers = msg[2]
       +        diff = "/download/issue" + clname + "_" + str(patchid) + ".diff"
        
       +        diffdata = MySend(diff, force_auth=False)
       +        
                # Print warning if email is not in CONTRIBUTORS file.
       -        FindContributor(ui, repo, email)
       -        cl.copied_from = email
       +        email = cl.dict.get("owner_email", "")
       +        if not email:
       +                return None, None, None, "cannot find owner for %s" % (clname)
       +        him = FindContributor(ui, repo, email)
       +        me = FindContributor(ui, repo, None)
       +        if him == me:
       +                cl.mailed = IsRietveldMailed(cl)
       +        else:
       +                cl.copied_from = email
        
       -        return cl, diffdata, ""
       +        return cl, vers, diffdata, ""
        
        def MySend(request_path, payload=None,
       -           content_type="application/octet-stream",
       -           timeout=None, force_auth=True,
       -           **kwargs):
       -     """Run MySend1 maybe twice, because Rietveld is unreliable."""
       -     try:
       -         return MySend1(request_path, payload, content_type, timeout, force_auth, **kwargs)
       -     except Exception, e:
       -         if type(e) == urllib2.HTTPError and e.code == 403:        # forbidden, it happens
       -                 raise
       -         print >>sys.stderr, "Loading "+request_path+": "+ExceptionDetail()+"; trying again in 2 seconds."
       -     time.sleep(2)
       -     return MySend1(request_path, payload, content_type, timeout, force_auth, **kwargs)
       -
       +                content_type="application/octet-stream",
       +                timeout=None, force_auth=True,
       +                **kwargs):
       +        """Run MySend1 maybe twice, because Rietveld is unreliable."""
       +        try:
       +                return MySend1(request_path, payload, content_type, timeout, force_auth, **kwargs)
       +        except Exception, e:
       +                if type(e) != urllib2.HTTPError or e.code != 500:        # only retry on HTTP 500 error
       +                        raise
       +                print >>sys.stderr, "Loading "+request_path+": "+ExceptionDetail()+"; trying again in 2 seconds."
       +                time.sleep(2)
       +                return MySend1(request_path, payload, content_type, timeout, force_auth, **kwargs)
        
        # Like upload.py Send but only authenticates when the
        # redirect is to www.google.com/accounts.  This keeps
        # unnecessary redirects from happening during testing.
        def MySend1(request_path, payload=None,
       -           content_type="application/octet-stream",
       -           timeout=None, force_auth=True,
       -           **kwargs):
       -    """Sends an RPC and returns the response.
       -
       -    Args:
       -      request_path: The path to send the request to, eg /api/appversion/create.
       -      payload: The body of the request, or None to send an empty request.
       -      content_type: The Content-Type header to use.
       -      timeout: timeout in seconds; default None i.e. no timeout.
       -        (Note: for large requests on OS X, the timeout doesn't work right.)
       -      kwargs: Any keyword arguments are converted into query string parameters.
       -
       -    Returns:
       -      The response body, as a string.
       -    """
       -    # TODO: Don't require authentication.  Let the server say
       -    # whether it is necessary.
       -    global rpc
       -    if rpc == None:
       -            rpc = GetRpcServer(upload_options)
       -    self = rpc
       -    if not self.authenticated and force_auth:
       -      self._Authenticate()
       -    if request_path is None:
       -      return
       -
       -    old_timeout = socket.getdefaulttimeout()
       -    socket.setdefaulttimeout(timeout)
       -    try:
       -      tries = 0
       -      while True:
       -        tries += 1
       -        args = dict(kwargs)
       -        url = "http://%s%s" % (self.host, request_path)
       -        if args:
       -          url += "?" + urllib.urlencode(args)
       -        req = self._CreateRequest(url=url, data=payload)
       -        req.add_header("Content-Type", content_type)
       -        try:
       -          f = self.opener.open(req)
       -          response = f.read()
       -          f.close()
       -          # Translate \r\n into \n, because Rietveld doesn't.
       -          response = response.replace('\r\n', '\n')
       -          return response
       -        except urllib2.HTTPError, e:
       -          if tries > 3:
       -            raise
       -          elif e.code == 401:
       -            self._Authenticate()
       -          elif e.code == 302:
       -            loc = e.info()["location"]
       -            if not loc.startswith('https://www.google.com/a') or loc.find('/ServiceLogin') < 0:
       -              return ''
       -            self._Authenticate()
       -          else:
       -            raise
       -    finally:
       -      socket.setdefaulttimeout(old_timeout)
       +                                content_type="application/octet-stream",
       +                                timeout=None, force_auth=True,
       +                                **kwargs):
       +        """Sends an RPC and returns the response.
       +
       +        Args:
       +                request_path: The path to send the request to, eg /api/appversion/create.
       +                payload: The body of the request, or None to send an empty request.
       +                content_type: The Content-Type header to use.
       +                timeout: timeout in seconds; default None i.e. no timeout.
       +                        (Note: for large requests on OS X, the timeout doesn't work right.)
       +                kwargs: Any keyword arguments are converted into query string parameters.
       +
       +        Returns:
       +                The response body, as a string.
       +        """
       +        # TODO: Don't require authentication.  Let the server say
       +        # whether it is necessary.
       +        global rpc
       +        if rpc == None:
       +                rpc = GetRpcServer(upload_options)
       +        self = rpc
       +        if not self.authenticated and force_auth:
       +                self._Authenticate()
       +        if request_path is None:
       +                return
       +
       +        old_timeout = socket.getdefaulttimeout()
       +        socket.setdefaulttimeout(timeout)
       +        try:
       +                tries = 0
       +                while True:
       +                        tries += 1
       +                        args = dict(kwargs)
       +                        url = "http://%s%s" % (self.host, request_path)
       +                        if args:
       +                                url += "?" + urllib.urlencode(args)
       +                        req = self._CreateRequest(url=url, data=payload)
       +                        req.add_header("Content-Type", content_type)
       +                        try:
       +                                f = self.opener.open(req)
       +                                response = f.read()
       +                                f.close()
       +                                # Translate \r\n into \n, because Rietveld doesn't.
       +                                response = response.replace('\r\n', '\n')
       +                                # who knows what urllib will give us
       +                                if type(response) == unicode:
       +                                        response = response.encode("utf-8")
       +                                typecheck(response, str)
       +                                return response
       +                        except urllib2.HTTPError, e:
       +                                if tries > 3:
       +                                        raise
       +                                elif e.code == 401:
       +                                        self._Authenticate()
       +                                elif e.code == 302:
       +                                        loc = e.info()["location"]
       +                                        if not loc.startswith('https://www.google.com/a') or loc.find('/ServiceLogin') < 0:
       +                                                return ''
       +                                        self._Authenticate()
       +                                else:
       +                                        raise
       +        finally:
       +                socket.setdefaulttimeout(old_timeout)
        
        def GetForm(url):
                f = FormParser()
       -        f.feed(MySend(url))
       +        f.feed(ustr(MySend(url)))        # f.feed wants unicode
                f.close()
       +        # convert back to utf-8 to restore sanity
       +        m = {}
                for k,v in f.map.items():
       -                f.map[k] = v.replace("\r\n", "\n");
       -        return f.map
       -
       -# Fetch the settings for the CL, like reviewer and CC list, by
       -# scraping the Rietveld editing forms.
       -def GetSettings(issue):
       -        # The /issue/edit page has everything but only the
       -        # CL owner is allowed to fetch it (and submit it).
       -        f = None
       -        try:
       -                f = GetForm("/" + issue + "/edit")
       -        except:
       -                pass
       -        if not f or 'reviewers' not in f:
       -                # Maybe we're not the CL owner.  Fall back to the
       -                # /publish page, which has the reviewer and CC lists,
       -                # and then fetch the description separately.
       -                f = GetForm("/" + issue + "/publish")
       -                f['description'] = MySend("/"+issue+"/description", force_auth=False)
       -        return f
       -
       -def EditDesc(issue, subject=None, desc=None, reviewers=None, cc=None, closed=None):
       +                m[k.encode("utf-8")] = v.replace("\r\n", "\n").encode("utf-8")
       +        return m
       +
       +def EditDesc(issue, subject=None, desc=None, reviewers=None, cc=None, closed=False, private=False):
       +        set_status("uploading change to description")
                form_fields = GetForm("/" + issue + "/edit")
                if subject is not None:
                        form_fields['subject'] = subject
       t@@ -1590,8 +2220,10 @@ def EditDesc(issue, subject=None, desc=None, reviewers=None, cc=None, closed=Non
                        form_fields['reviewers'] = reviewers
                if cc is not None:
                        form_fields['cc'] = cc
       -        if closed is not None:
       -                form_fields['closed'] = closed
       +        if closed:
       +                form_fields['closed'] = "checked"
       +        if private:
       +                form_fields['private'] = "checked"
                ctype, body = EncodeMultipartFormData(form_fields.items(), [])
                response = MySend("/" + issue + "/edit", body, content_type=ctype)
                if response != "":
       t@@ -1599,6 +2231,7 @@ def EditDesc(issue, subject=None, desc=None, reviewers=None, cc=None, closed=Non
                        sys.exit(2)
        
        def PostMessage(ui, issue, message, reviewers=None, cc=None, send_mail=True, subject=None):
       +        set_status("uploading message")
                form_fields = GetForm("/" + issue + "/publish")
                if reviewers is not None:
                        form_fields['reviewers'] = reviewers
       t@@ -1611,7 +2244,7 @@ def PostMessage(ui, issue, message, reviewers=None, cc=None, send_mail=True, sub
                if subject is not None:
                        form_fields['subject'] = subject
                form_fields['message'] = message
       -
       +        
                form_fields['message_only'] = '1'        # Don't include draft comments
                if reviewers is not None or cc is not None:
                        form_fields['message_only'] = ''        # Must set '' in order to override cc/reviewer
       t@@ -1625,12 +2258,27 @@ def PostMessage(ui, issue, message, reviewers=None, cc=None, send_mail=True, sub
        class opt(object):
                pass
        
       +def nocommit(*pats, **opts):
       +        """(disabled when using this extension)"""
       +        raise util.Abort("codereview extension enabled; use mail, upload, or submit instead of commit")
       +
       +def nobackout(*pats, **opts):
       +        """(disabled when using this extension)"""
       +        raise util.Abort("codereview extension enabled; use undo instead of backout")
       +
       +def norollback(*pats, **opts):
       +        """(disabled when using this extension)"""
       +        raise util.Abort("codereview extension enabled; use undo instead of rollback")
       +
        def RietveldSetup(ui, repo):
                global defaultcc, upload_options, rpc, server, server_url_base, force_google_account, verbosity, contributors
       +        global missing_codereview
        
       +        repo_config_path = ''
                # Read repository-specific options from lib/codereview/codereview.cfg
                try:
       -                f = open(repo.root + '/lib/codereview/codereview.cfg')
       +                repo_config_path = repo.root + '/lib/codereview/codereview.cfg'
       +                f = open(repo_config_path)
                        for line in f:
                                if line.startswith('defaultcc: '):
                                        defaultcc = SplitCommaSpace(line[10:])
       t@@ -1639,8 +2287,21 @@ def RietveldSetup(ui, repo):
                        # a code review repository; stop now before we foul
                        # things up even worse.  Might also be that repo doesn't
                        # even have a root.  See issue 959.
       +                if repo_config_path == '':
       +                        missing_codereview = 'codereview disabled: repository has no root'
       +                else:
       +                        missing_codereview = 'codereview disabled: cannot open ' + repo_config_path
                        return
        
       +        # Should only modify repository with hg submit.
       +        # Disable the built-in Mercurial commands that might
       +        # trip things up.
       +        cmdutil.commit = nocommit
       +        global real_rollback
       +        real_rollback = repo.rollback
       +        repo.rollback = norollback
       +        # would install nobackout if we could; oh well
       +
                try:
                        f = open(repo.root + '/CONTRIBUTORS', 'r')
                except:
       t@@ -1659,15 +2320,6 @@ def RietveldSetup(ui, repo):
                                contributors[email.lower()] = (name, email)
                                for extra in m.group(3).split():
                                        contributors[extra[1:-1].lower()] = (name, email)
       -        
       -
       -        # TODO(rsc): If the repository config has no codereview section,
       -        # do not enable the extension.  This allows users to
       -        # put the extension in their global .hgrc but only
       -        # enable it for some repositories.
       -        # if not ui.has_section("codereview"):
       -        #         cmdtable = {}
       -        #         return
        
                if not ui.verbose:
                        verbosity = 0
       t@@ -1710,13 +2362,22 @@ def RietveldSetup(ui, repo):
                        upload_options.email = "test@example.com"
        
                rpc = None
       +        
       +        global releaseBranch
       +        tags = repo.branchtags().keys()
       +        if 'release-branch.r100' in tags:
       +                # NOTE(rsc): This tags.sort is going to get the wrong
       +                # answer when comparing release-branch.r99 with
       +                # release-branch.r100.  If we do ten releases a year
       +                # that gives us 4 years before we have to worry about this.
       +                raise util.Abort('tags.sort needs to be fixed for release-branch.r100')
       +        tags.sort()
       +        for t in tags:
       +                if t.startswith('release-branch.'):
       +                        releaseBranch = t                        
        
        #######################################################################
       -# We keep a full copy of upload.py here to avoid import path hell.
       -# It would be nice if hg added the hg repository root
       -# to the default PYTHONPATH.
       -
       -# Edit .+2,<hget http://codereview.appspot.com/static/upload.py
       +# http://codereview.appspot.com/static/upload.py, heavily edited.
        
        #!/usr/bin/env python
        #
       t@@ -1726,7 +2387,7 @@ def RietveldSetup(ui, repo):
        # you may not use this file except in compliance with the License.
        # You may obtain a copy of the License at
        #
       -#     http://www.apache.org/licenses/LICENSE-2.0
       +#        http://www.apache.org/licenses/LICENSE-2.0
        #
        # Unless required by applicable law or agreed to in writing, software
        # distributed under the License is distributed on an "AS IS" BASIS,
       t@@ -1741,9 +2402,9 @@ Usage summary: upload.py [options] [-- diff_options]
        Diff options are passed to the diff command of the underlying system.
        
        Supported version control systems:
       -  Git
       -  Mercurial
       -  Subversion
       +        Git
       +        Mercurial
       +        Subversion
        
        It is important for Git/Mercurial users to specify a tree/node/branch to diff
        against by using the '--rev' option.
       t@@ -1767,14 +2428,14 @@ import urlparse
        
        # The md5 module was deprecated in Python 2.5.
        try:
       -  from hashlib import md5
       +        from hashlib import md5
        except ImportError:
       -  from md5 import md5
       +        from md5 import md5
        
        try:
       -  import readline
       +        import readline
        except ImportError:
       -  pass
       +        pass
        
        # The logging verbosity:
        #  0: Errors only.
       t@@ -1786,1463 +2447,835 @@ verbosity = 1
        # Max size of patch or base file.
        MAX_UPLOAD_SIZE = 900 * 1024
        
       -# Constants for version control names.  Used by GuessVCSName.
       -VCS_GIT = "Git"
       -VCS_MERCURIAL = "Mercurial"
       -VCS_SUBVERSION = "Subversion"
       -VCS_UNKNOWN = "Unknown"
       -
        # whitelist for non-binary filetypes which do not start with "text/"
        # .mm (Objective-C) shows up as application/x-freemind on my Linux box.
       -TEXT_MIMETYPES = ['application/javascript', 'application/x-javascript',
       -                  'application/x-freemind']
       -
       -VCS_ABBREVIATIONS = {
       -  VCS_MERCURIAL.lower(): VCS_MERCURIAL,
       -  "hg": VCS_MERCURIAL,
       -  VCS_SUBVERSION.lower(): VCS_SUBVERSION,
       -  "svn": VCS_SUBVERSION,
       -  VCS_GIT.lower(): VCS_GIT,
       -}
       -
       +TEXT_MIMETYPES = [
       +        'application/javascript',
       +        'application/x-javascript',
       +        'application/x-freemind'
       +]
        
        def GetEmail(prompt):
       -  """Prompts the user for their email address and returns it.
       +        """Prompts the user for their email address and returns it.
        
       -  The last used email address is saved to a file and offered up as a suggestion
       -  to the user. If the user presses enter without typing in anything the last
       -  used email address is used. If the user enters a new address, it is saved
       -  for next time we prompt.
       +        The last used email address is saved to a file and offered up as a suggestion
       +        to the user. If the user presses enter without typing in anything the last
       +        used email address is used. If the user enters a new address, it is saved
       +        for next time we prompt.
        
       -  """
       -  last_email_file_name = os.path.expanduser("~/.last_codereview_email_address")
       -  last_email = ""
       -  if os.path.exists(last_email_file_name):
       -    try:
       -      last_email_file = open(last_email_file_name, "r")
       -      last_email = last_email_file.readline().strip("\n")
       -      last_email_file.close()
       -      prompt += " [%s]" % last_email
       -    except IOError, e:
       -      pass
       -  email = raw_input(prompt + ": ").strip()
       -  if email:
       -    try:
       -      last_email_file = open(last_email_file_name, "w")
       -      last_email_file.write(email)
       -      last_email_file.close()
       -    except IOError, e:
       -      pass
       -  else:
       -    email = last_email
       -  return email
       +        """
       +        last_email_file_name = os.path.expanduser("~/.last_codereview_email_address")
       +        last_email = ""
       +        if os.path.exists(last_email_file_name):
       +                try:
       +                        last_email_file = open(last_email_file_name, "r")
       +                        last_email = last_email_file.readline().strip("\n")
       +                        last_email_file.close()
       +                        prompt += " [%s]" % last_email
       +                except IOError, e:
       +                        pass
       +        email = raw_input(prompt + ": ").strip()
       +        if email:
       +                try:
       +                        last_email_file = open(last_email_file_name, "w")
       +                        last_email_file.write(email)
       +                        last_email_file.close()
       +                except IOError, e:
       +                        pass
       +        else:
       +                email = last_email
       +        return email
        
        
        def StatusUpdate(msg):
       -  """Print a status message to stdout.
       +        """Print a status message to stdout.
        
       -  If 'verbosity' is greater than 0, print the message.
       +        If 'verbosity' is greater than 0, print the message.
        
       -  Args:
       -    msg: The string to print.
       -  """
       -  if verbosity > 0:
       -    print msg
       +        Args:
       +                msg: The string to print.
       +        """
       +        if verbosity > 0:
       +                print msg
        
        
        def ErrorExit(msg):
       -  """Print an error message to stderr and exit."""
       -  print >>sys.stderr, msg
       -  sys.exit(1)
       +        """Print an error message to stderr and exit."""
       +        print >>sys.stderr, msg
       +        sys.exit(1)
        
        
        class ClientLoginError(urllib2.HTTPError):
       -  """Raised to indicate there was an error authenticating with ClientLogin."""
       +        """Raised to indicate there was an error authenticating with ClientLogin."""
        
       -  def __init__(self, url, code, msg, headers, args):
       -    urllib2.HTTPError.__init__(self, url, code, msg, headers, None)
       -    self.args = args
       -    self.reason = args["Error"]
       +        def __init__(self, url, code, msg, headers, args):
       +                urllib2.HTTPError.__init__(self, url, code, msg, headers, None)
       +                self.args = args
       +                self.reason = args["Error"]
        
        
        class AbstractRpcServer(object):
       -  """Provides a common interface for a simple RPC server."""
       -
       -  def __init__(self, host, auth_function, host_override=None, extra_headers={},
       -               save_cookies=False):
       -    """Creates a new HttpRpcServer.
       -
       -    Args:
       -      host: The host to send requests to.
       -      auth_function: A function that takes no arguments and returns an
       -        (email, password) tuple when called. Will be called if authentication
       -        is required.
       -      host_override: The host header to send to the server (defaults to host).
       -      extra_headers: A dict of extra headers to append to every request.
       -      save_cookies: If True, save the authentication cookies to local disk.
       -        If False, use an in-memory cookiejar instead.  Subclasses must
       -        implement this functionality.  Defaults to False.
       -    """
       -    self.host = host
       -    self.host_override = host_override
       -    self.auth_function = auth_function
       -    self.authenticated = False
       -    self.extra_headers = extra_headers
       -    self.save_cookies = save_cookies
       -    self.opener = self._GetOpener()
       -    if self.host_override:
       -      logging.info("Server: %s; Host: %s", self.host, self.host_override)
       -    else:
       -      logging.info("Server: %s", self.host)
       -
       -  def _GetOpener(self):
       -    """Returns an OpenerDirector for making HTTP requests.
       -
       -    Returns:
       -      A urllib2.OpenerDirector object.
       -    """
       -    raise NotImplementedError()
       -
       -  def _CreateRequest(self, url, data=None):
       -    """Creates a new urllib request."""
       -    logging.debug("Creating request for: '%s' with payload:\n%s", url, data)
       -    req = urllib2.Request(url, data=data)
       -    if self.host_override:
       -      req.add_header("Host", self.host_override)
       -    for key, value in self.extra_headers.iteritems():
       -      req.add_header(key, value)
       -    return req
       -
       -  def _GetAuthToken(self, email, password):
       -    """Uses ClientLogin to authenticate the user, returning an auth token.
       -
       -    Args:
       -      email:    The user's email address
       -      password: The user's password
       -
       -    Raises:
       -      ClientLoginError: If there was an error authenticating with ClientLogin.
       -      HTTPError: If there was some other form of HTTP error.
       -
       -    Returns:
       -      The authentication token returned by ClientLogin.
       -    """
       -    account_type = "GOOGLE"
       -    if self.host.endswith(".google.com") and not force_google_account:
       -      # Needed for use inside Google.
       -      account_type = "HOSTED"
       -    req = self._CreateRequest(
       -        url="https://www.google.com/accounts/ClientLogin",
       -        data=urllib.urlencode({
       -            "Email": email,
       -            "Passwd": password,
       -            "service": "ah",
       -            "source": "rietveld-codereview-upload",
       -            "accountType": account_type,
       -        }),
       -    )
       -    try:
       -      response = self.opener.open(req)
       -      response_body = response.read()
       -      response_dict = dict(x.split("=")
       -                           for x in response_body.split("\n") if x)
       -      return response_dict["Auth"]
       -    except urllib2.HTTPError, e:
       -      if e.code == 403:
       -        body = e.read()
       -        response_dict = dict(x.split("=", 1) for x in body.split("\n") if x)
       -        raise ClientLoginError(req.get_full_url(), e.code, e.msg,
       -                               e.headers, response_dict)
       -      else:
       -        raise
       -
       -  def _GetAuthCookie(self, auth_token):
       -    """Fetches authentication cookies for an authentication token.
       -
       -    Args:
       -      auth_token: The authentication token returned by ClientLogin.
       -
       -    Raises:
       -      HTTPError: If there was an error fetching the authentication cookies.
       -    """
       -    # This is a dummy value to allow us to identify when we're successful.
       -    continue_location = "http://localhost/"
       -    args = {"continue": continue_location, "auth": auth_token}
       -    req = self._CreateRequest("http://%s/_ah/login?%s" %
       -                              (self.host, urllib.urlencode(args)))
       -    try:
       -      response = self.opener.open(req)
       -    except urllib2.HTTPError, e:
       -      response = e
       -    if (response.code != 302 or
       -        response.info()["location"] != continue_location):
       -      raise urllib2.HTTPError(req.get_full_url(), response.code, response.msg,
       -                              response.headers, response.fp)
       -    self.authenticated = True
       -
       -  def _Authenticate(self):
       -    """Authenticates the user.
       -
       -    The authentication process works as follows:
       -     1) We get a username and password from the user
       -     2) We use ClientLogin to obtain an AUTH token for the user
       -        (see http://code.google.com/apis/accounts/AuthForInstalledApps.html).
       -     3) We pass the auth token to /_ah/login on the server to obtain an
       -        authentication cookie. If login was successful, it tries to redirect
       -        us to the URL we provided.
       -
       -    If we attempt to access the upload API without first obtaining an
       -    authentication cookie, it returns a 401 response (or a 302) and
       -    directs us to authenticate ourselves with ClientLogin.
       -    """
       -    for i in range(3):
       -      credentials = self.auth_function()
       -      try:
       -        auth_token = self._GetAuthToken(credentials[0], credentials[1])
       -      except ClientLoginError, e:
       -        if e.reason == "BadAuthentication":
       -          print >>sys.stderr, "Invalid username or password."
       -          continue
       -        if e.reason == "CaptchaRequired":
       -          print >>sys.stderr, (
       -              "Please go to\n"
       -              "https://www.google.com/accounts/DisplayUnlockCaptcha\n"
       -              "and verify you are a human.  Then try again.")
       -          break
       -        if e.reason == "NotVerified":
       -          print >>sys.stderr, "Account not verified."
       -          break
       -        if e.reason == "TermsNotAgreed":
       -          print >>sys.stderr, "User has not agreed to TOS."
       -          break
       -        if e.reason == "AccountDeleted":
       -          print >>sys.stderr, "The user account has been deleted."
       -          break
       -        if e.reason == "AccountDisabled":
       -          print >>sys.stderr, "The user account has been disabled."
       -          break
       -        if e.reason == "ServiceDisabled":
       -          print >>sys.stderr, ("The user's access to the service has been "
       -                               "disabled.")
       -          break
       -        if e.reason == "ServiceUnavailable":
       -          print >>sys.stderr, "The service is not available; try again later."
       -          break
       -        raise
       -      self._GetAuthCookie(auth_token)
       -      return
       -
       -  def Send(self, request_path, payload=None,
       -           content_type="application/octet-stream",
       -           timeout=None,
       -           **kwargs):
       -    """Sends an RPC and returns the response.
       -
       -    Args:
       -      request_path: The path to send the request to, eg /api/appversion/create.
       -      payload: The body of the request, or None to send an empty request.
       -      content_type: The Content-Type header to use.
       -      timeout: timeout in seconds; default None i.e. no timeout.
       -        (Note: for large requests on OS X, the timeout doesn't work right.)
       -      kwargs: Any keyword arguments are converted into query string parameters.
       -
       -    Returns:
       -      The response body, as a string.
       -    """
       -    # TODO: Don't require authentication.  Let the server say
       -    # whether it is necessary.
       -    if not self.authenticated:
       -      self._Authenticate()
       -
       -    old_timeout = socket.getdefaulttimeout()
       -    socket.setdefaulttimeout(timeout)
       -    try:
       -      tries = 0
       -      while True:
       -        tries += 1
       -        args = dict(kwargs)
       -        url = "http://%s%s" % (self.host, request_path)
       -        if args:
       -          url += "?" + urllib.urlencode(args)
       -        req = self._CreateRequest(url=url, data=payload)
       -        req.add_header("Content-Type", content_type)
       -        try:
       -          f = self.opener.open(req)
       -          response = f.read()
       -          f.close()
       -          return response
       -        except urllib2.HTTPError, e:
       -          if tries > 3:
       -            raise
       -          elif e.code == 401 or e.code == 302:
       -            self._Authenticate()
       -          else:
       -            raise
       -    finally:
       -      socket.setdefaulttimeout(old_timeout)
       +        """Provides a common interface for a simple RPC server."""
       +
       +        def __init__(self, host, auth_function, host_override=None, extra_headers={}, save_cookies=False):
       +                """Creates a new HttpRpcServer.
       +
       +                Args:
       +                        host: The host to send requests to.
       +                        auth_function: A function that takes no arguments and returns an
       +                                (email, password) tuple when called. Will be called if authentication
       +                                is required.
       +                        host_override: The host header to send to the server (defaults to host).
       +                        extra_headers: A dict of extra headers to append to every request.
       +                        save_cookies: If True, save the authentication cookies to local disk.
       +                                If False, use an in-memory cookiejar instead.  Subclasses must
       +                                implement this functionality.  Defaults to False.
       +                """
       +                self.host = host
       +                self.host_override = host_override
       +                self.auth_function = auth_function
       +                self.authenticated = False
       +                self.extra_headers = extra_headers
       +                self.save_cookies = save_cookies
       +                self.opener = self._GetOpener()
       +                if self.host_override:
       +                        logging.info("Server: %s; Host: %s", self.host, self.host_override)
       +                else:
       +                        logging.info("Server: %s", self.host)
       +
       +        def _GetOpener(self):
       +                """Returns an OpenerDirector for making HTTP requests.
       +
       +                Returns:
       +                        A urllib2.OpenerDirector object.
       +                """
       +                raise NotImplementedError()
       +
       +        def _CreateRequest(self, url, data=None):
       +                """Creates a new urllib request."""
       +                logging.debug("Creating request for: '%s' with payload:\n%s", url, data)
       +                req = urllib2.Request(url, data=data)
       +                if self.host_override:
       +                        req.add_header("Host", self.host_override)
       +                for key, value in self.extra_headers.iteritems():
       +                        req.add_header(key, value)
       +                return req
       +
       +        def _GetAuthToken(self, email, password):
       +                """Uses ClientLogin to authenticate the user, returning an auth token.
       +
       +                Args:
       +                        email:    The user's email address
       +                        password: The user's password
       +
       +                Raises:
       +                        ClientLoginError: If there was an error authenticating with ClientLogin.
       +                        HTTPError: If there was some other form of HTTP error.
       +
       +                Returns:
       +                        The authentication token returned by ClientLogin.
       +                """
       +                account_type = "GOOGLE"
       +                if self.host.endswith(".google.com") and not force_google_account:
       +                        # Needed for use inside Google.
       +                        account_type = "HOSTED"
       +                req = self._CreateRequest(
       +                                url="https://www.google.com/accounts/ClientLogin",
       +                                data=urllib.urlencode({
       +                                                "Email": email,
       +                                                "Passwd": password,
       +                                                "service": "ah",
       +                                                "source": "rietveld-codereview-upload",
       +                                                "accountType": account_type,
       +                                }),
       +                )
       +                try:
       +                        response = self.opener.open(req)
       +                        response_body = response.read()
       +                        response_dict = dict(x.split("=") for x in response_body.split("\n") if x)
       +                        return response_dict["Auth"]
       +                except urllib2.HTTPError, e:
       +                        if e.code == 403:
       +                                body = e.read()
       +                                response_dict = dict(x.split("=", 1) for x in body.split("\n") if x)
       +                                raise ClientLoginError(req.get_full_url(), e.code, e.msg, e.headers, response_dict)
       +                        else:
       +                                raise
       +
       +        def _GetAuthCookie(self, auth_token):
       +                """Fetches authentication cookies for an authentication token.
       +
       +                Args:
       +                        auth_token: The authentication token returned by ClientLogin.
       +
       +                Raises:
       +                        HTTPError: If there was an error fetching the authentication cookies.
       +                """
       +                # This is a dummy value to allow us to identify when we're successful.
       +                continue_location = "http://localhost/"
       +                args = {"continue": continue_location, "auth": auth_token}
       +                req = self._CreateRequest("http://%s/_ah/login?%s" % (self.host, urllib.urlencode(args)))
       +                try:
       +                        response = self.opener.open(req)
       +                except urllib2.HTTPError, e:
       +                        response = e
       +                if (response.code != 302 or
       +                                response.info()["location"] != continue_location):
       +                        raise urllib2.HTTPError(req.get_full_url(), response.code, response.msg, response.headers, response.fp)
       +                self.authenticated = True
       +
       +        def _Authenticate(self):
       +                """Authenticates the user.
       +
       +                The authentication process works as follows:
       +                1) We get a username and password from the user
       +                2) We use ClientLogin to obtain an AUTH token for the user
       +                                (see http://code.google.com/apis/accounts/AuthForInstalledApps.html).
       +                3) We pass the auth token to /_ah/login on the server to obtain an
       +                                authentication cookie. If login was successful, it tries to redirect
       +                                us to the URL we provided.
       +
       +                If we attempt to access the upload API without first obtaining an
       +                authentication cookie, it returns a 401 response (or a 302) and
       +                directs us to authenticate ourselves with ClientLogin.
       +                """
       +                for i in range(3):
       +                        credentials = self.auth_function()
       +                        try:
       +                                auth_token = self._GetAuthToken(credentials[0], credentials[1])
       +                        except ClientLoginError, e:
       +                                if e.reason == "BadAuthentication":
       +                                        print >>sys.stderr, "Invalid username or password."
       +                                        continue
       +                                if e.reason == "CaptchaRequired":
       +                                        print >>sys.stderr, (
       +                                                "Please go to\n"
       +                                                "https://www.google.com/accounts/DisplayUnlockCaptcha\n"
       +                                                "and verify you are a human.  Then try again.")
       +                                        break
       +                                if e.reason == "NotVerified":
       +                                        print >>sys.stderr, "Account not verified."
       +                                        break
       +                                if e.reason == "TermsNotAgreed":
       +                                        print >>sys.stderr, "User has not agreed to TOS."
       +                                        break
       +                                if e.reason == "AccountDeleted":
       +                                        print >>sys.stderr, "The user account has been deleted."
       +                                        break
       +                                if e.reason == "AccountDisabled":
       +                                        print >>sys.stderr, "The user account has been disabled."
       +                                        break
       +                                if e.reason == "ServiceDisabled":
       +                                        print >>sys.stderr, "The user's access to the service has been disabled."
       +                                        break
       +                                if e.reason == "ServiceUnavailable":
       +                                        print >>sys.stderr, "The service is not available; try again later."
       +                                        break
       +                                raise
       +                        self._GetAuthCookie(auth_token)
       +                        return
       +
       +        def Send(self, request_path, payload=None,
       +                                        content_type="application/octet-stream",
       +                                        timeout=None,
       +                                        **kwargs):
       +                """Sends an RPC and returns the response.
       +
       +                Args:
       +                        request_path: The path to send the request to, eg /api/appversion/create.
       +                        payload: The body of the request, or None to send an empty request.
       +                        content_type: The Content-Type header to use.
       +                        timeout: timeout in seconds; default None i.e. no timeout.
       +                                (Note: for large requests on OS X, the timeout doesn't work right.)
       +                        kwargs: Any keyword arguments are converted into query string parameters.
       +
       +                Returns:
       +                        The response body, as a string.
       +                """
       +                # TODO: Don't require authentication.  Let the server say
       +                # whether it is necessary.
       +                if not self.authenticated:
       +                        self._Authenticate()
       +
       +                old_timeout = socket.getdefaulttimeout()
       +                socket.setdefaulttimeout(timeout)
       +                try:
       +                        tries = 0
       +                        while True:
       +                                tries += 1
       +                                args = dict(kwargs)
       +                                url = "http://%s%s" % (self.host, request_path)
       +                                if args:
       +                                        url += "?" + urllib.urlencode(args)
       +                                req = self._CreateRequest(url=url, data=payload)
       +                                req.add_header("Content-Type", content_type)
       +                                try:
       +                                        f = self.opener.open(req)
       +                                        response = f.read()
       +                                        f.close()
       +                                        return response
       +                                except urllib2.HTTPError, e:
       +                                        if tries > 3:
       +                                                raise
       +                                        elif e.code == 401 or e.code == 302:
       +                                                self._Authenticate()
       +                                        else:
       +                                                raise
       +                finally:
       +                        socket.setdefaulttimeout(old_timeout)
        
        
        class HttpRpcServer(AbstractRpcServer):
       -  """Provides a simplified RPC-style interface for HTTP requests."""
       -
       -  def _Authenticate(self):
       -    """Save the cookie jar after authentication."""
       -    super(HttpRpcServer, self)._Authenticate()
       -    if self.save_cookies:
       -      StatusUpdate("Saving authentication cookies to %s" % self.cookie_file)
       -      self.cookie_jar.save()
       -
       -  def _GetOpener(self):
       -    """Returns an OpenerDirector that supports cookies and ignores redirects.
       -
       -    Returns:
       -      A urllib2.OpenerDirector object.
       -    """
       -    opener = urllib2.OpenerDirector()
       -    opener.add_handler(urllib2.ProxyHandler())
       -    opener.add_handler(urllib2.UnknownHandler())
       -    opener.add_handler(urllib2.HTTPHandler())
       -    opener.add_handler(urllib2.HTTPDefaultErrorHandler())
       -    opener.add_handler(urllib2.HTTPSHandler())
       -    opener.add_handler(urllib2.HTTPErrorProcessor())
       -    if self.save_cookies:
       -      self.cookie_file = os.path.expanduser("~/.codereview_upload_cookies_" + server)
       -      self.cookie_jar = cookielib.MozillaCookieJar(self.cookie_file)
       -      if os.path.exists(self.cookie_file):
       -        try:
       -          self.cookie_jar.load()
       -          self.authenticated = True
       -          StatusUpdate("Loaded authentication cookies from %s" %
       -                       self.cookie_file)
       -        except (cookielib.LoadError, IOError):
       -          # Failed to load cookies - just ignore them.
       -          pass
       -      else:
       -        # Create an empty cookie file with mode 600
       -        fd = os.open(self.cookie_file, os.O_CREAT, 0600)
       -        os.close(fd)
       -      # Always chmod the cookie file
       -      os.chmod(self.cookie_file, 0600)
       -    else:
       -      # Don't save cookies across runs of update.py.
       -      self.cookie_jar = cookielib.CookieJar()
       -    opener.add_handler(urllib2.HTTPCookieProcessor(self.cookie_jar))
       -    return opener
       -
       -
       -parser = optparse.OptionParser(usage="%prog [options] [-- diff_options]")
       -parser.add_option("-y", "--assume_yes", action="store_true",
       -                  dest="assume_yes", default=False,
       -                  help="Assume that the answer to yes/no questions is 'yes'.")
       -# Logging
       -group = parser.add_option_group("Logging options")
       -group.add_option("-q", "--quiet", action="store_const", const=0,
       -                 dest="verbose", help="Print errors only.")
       -group.add_option("-v", "--verbose", action="store_const", const=2,
       -                 dest="verbose", default=1,
       -                 help="Print info level logs (default).")
       -group.add_option("--noisy", action="store_const", const=3,
       -                 dest="verbose", help="Print all logs.")
       -# Review server
       -group = parser.add_option_group("Review server options")
       -group.add_option("-s", "--server", action="store", dest="server",
       -                 default="codereview.appspot.com",
       -                 metavar="SERVER",
       -                 help=("The server to upload to. The format is host[:port]. "
       -                       "Defaults to '%default'."))
       -group.add_option("-e", "--email", action="store", dest="email",
       -                 metavar="EMAIL", default=None,
       -                 help="The username to use. Will prompt if omitted.")
       -group.add_option("-H", "--host", action="store", dest="host",
       -                 metavar="HOST", default=None,
       -                 help="Overrides the Host header sent with all RPCs.")
       -group.add_option("--no_cookies", action="store_false",
       -                 dest="save_cookies", default=True,
       -                 help="Do not save authentication cookies to local disk.")
       -# Issue
       -group = parser.add_option_group("Issue options")
       -group.add_option("-d", "--description", action="store", dest="description",
       -                 metavar="DESCRIPTION", default=None,
       -                 help="Optional description when creating an issue.")
       -group.add_option("-f", "--description_file", action="store",
       -                 dest="description_file", metavar="DESCRIPTION_FILE",
       -                 default=None,
       -                 help="Optional path of a file that contains "
       -                      "the description when creating an issue.")
       -group.add_option("-r", "--reviewers", action="store", dest="reviewers",
       -                 metavar="REVIEWERS", default=None,
       -                 help="Add reviewers (comma separated email addresses).")
       -group.add_option("--cc", action="store", dest="cc",
       -                 metavar="CC", default=None,
       -                 help="Add CC (comma separated email addresses).")
       -group.add_option("--private", action="store_true", dest="private",
       -                 default=False,
       -                 help="Make the issue restricted to reviewers and those CCed")
       -# Upload options
       -group = parser.add_option_group("Patch options")
       -group.add_option("-m", "--message", action="store", dest="message",
       -                 metavar="MESSAGE", default=None,
       -                 help="A message to identify the patch. "
       -                      "Will prompt if omitted.")
       -group.add_option("-i", "--issue", type="int", action="store",
       -                 metavar="ISSUE", default=None,
       -                 help="Issue number to which to add. Defaults to new issue.")
       -group.add_option("--download_base", action="store_true",
       -                 dest="download_base", default=False,
       -                 help="Base files will be downloaded by the server "
       -                 "(side-by-side diffs may not work on files with CRs).")
       -group.add_option("--rev", action="store", dest="revision",
       -                 metavar="REV", default=None,
       -                 help="Branch/tree/revision to diff against (used by DVCS).")
       -group.add_option("--send_mail", action="store_true",
       -                 dest="send_mail", default=False,
       -                 help="Send notification email to reviewers.")
       -group.add_option("--vcs", action="store", dest="vcs",
       -                 metavar="VCS", default=None,
       -                 help=("Version control system (optional, usually upload.py "
       -                       "already guesses the right VCS)."))
       +        """Provides a simplified RPC-style interface for HTTP requests."""
       +
       +        def _Authenticate(self):
       +                """Save the cookie jar after authentication."""
       +                super(HttpRpcServer, self)._Authenticate()
       +                if self.save_cookies:
       +                        StatusUpdate("Saving authentication cookies to %s" % self.cookie_file)
       +                        self.cookie_jar.save()
       +
       +        def _GetOpener(self):
       +                """Returns an OpenerDirector that supports cookies and ignores redirects.
       +
       +                Returns:
       +                        A urllib2.OpenerDirector object.
       +                """
       +                opener = urllib2.OpenerDirector()
       +                opener.add_handler(urllib2.ProxyHandler())
       +                opener.add_handler(urllib2.UnknownHandler())
       +                opener.add_handler(urllib2.HTTPHandler())
       +                opener.add_handler(urllib2.HTTPDefaultErrorHandler())
       +                opener.add_handler(urllib2.HTTPSHandler())
       +                opener.add_handler(urllib2.HTTPErrorProcessor())
       +                if self.save_cookies:
       +                        self.cookie_file = os.path.expanduser("~/.codereview_upload_cookies_" + server)
       +                        self.cookie_jar = cookielib.MozillaCookieJar(self.cookie_file)
       +                        if os.path.exists(self.cookie_file):
       +                                try:
       +                                        self.cookie_jar.load()
       +                                        self.authenticated = True
       +                                        StatusUpdate("Loaded authentication cookies from %s" % self.cookie_file)
       +                                except (cookielib.LoadError, IOError):
       +                                        # Failed to load cookies - just ignore them.
       +                                        pass
       +                        else:
       +                                # Create an empty cookie file with mode 600
       +                                fd = os.open(self.cookie_file, os.O_CREAT, 0600)
       +                                os.close(fd)
       +                        # Always chmod the cookie file
       +                        os.chmod(self.cookie_file, 0600)
       +                else:
       +                        # Don't save cookies across runs of update.py.
       +                        self.cookie_jar = cookielib.CookieJar()
       +                opener.add_handler(urllib2.HTTPCookieProcessor(self.cookie_jar))
       +                return opener
        
        
        def GetRpcServer(options):
       -  """Returns an instance of an AbstractRpcServer.
       -
       -  Returns:
       -    A new AbstractRpcServer, on which RPC calls can be made.
       -  """
       -
       -  rpc_server_class = HttpRpcServer
       -
       -  def GetUserCredentials():
       -    """Prompts the user for a username and password."""
       -    email = options.email
       -    if email is None:
       -      email = GetEmail("Email (login for uploading to %s)" % options.server)
       -    password = getpass.getpass("Password for %s: " % email)
       -    return (email, password)
       -
       -  # If this is the dev_appserver, use fake authentication.
       -  host = (options.host or options.server).lower()
       -  if host == "localhost" or host.startswith("localhost:"):
       -    email = options.email
       -    if email is None:
       -      email = "test@example.com"
       -      logging.info("Using debug user %s.  Override with --email" % email)
       -    server = rpc_server_class(
       -        options.server,
       -        lambda: (email, "password"),
       -        host_override=options.host,
       -        extra_headers={"Cookie":
       -                       'dev_appserver_login="%s:False"' % email},
       -        save_cookies=options.save_cookies)
       -    # Don't try to talk to ClientLogin.
       -    server.authenticated = True
       -    return server
       -
       -  return rpc_server_class(options.server, GetUserCredentials,
       -                          host_override=options.host,
       -                          save_cookies=options.save_cookies)
       +        """Returns an instance of an AbstractRpcServer.
       +
       +        Returns:
       +                A new AbstractRpcServer, on which RPC calls can be made.
       +        """
       +
       +        rpc_server_class = HttpRpcServer
       +
       +        def GetUserCredentials():
       +                """Prompts the user for a username and password."""
       +                # Disable status prints so they don't obscure the password prompt.
       +                global global_status
       +                st = global_status
       +                global_status = None
       +
       +                email = options.email
       +                if email is None:
       +                        email = GetEmail("Email (login for uploading to %s)" % options.server)
       +                password = getpass.getpass("Password for %s: " % email)
       +
       +                # Put status back.
       +                global_status = st
       +                return (email, password)
       +
       +        # If this is the dev_appserver, use fake authentication.
       +        host = (options.host or options.server).lower()
       +        if host == "localhost" or host.startswith("localhost:"):
       +                email = options.email
       +                if email is None:
       +                        email = "test@example.com"
       +                        logging.info("Using debug user %s.  Override with --email" % email)
       +                server = rpc_server_class(
       +                                options.server,
       +                                lambda: (email, "password"),
       +                                host_override=options.host,
       +                                extra_headers={"Cookie": 'dev_appserver_login="%s:False"' % email},
       +                                save_cookies=options.save_cookies)
       +                # Don't try to talk to ClientLogin.
       +                server.authenticated = True
       +                return server
       +
       +        return rpc_server_class(options.server, GetUserCredentials,
       +                host_override=options.host, save_cookies=options.save_cookies)
        
        
        def EncodeMultipartFormData(fields, files):
       -  """Encode form fields for multipart/form-data.
       -
       -  Args:
       -    fields: A sequence of (name, value) elements for regular form fields.
       -    files: A sequence of (name, filename, value) elements for data to be
       -           uploaded as files.
       -  Returns:
       -    (content_type, body) ready for httplib.HTTP instance.
       -
       -  Source:
       -    http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/146306
       -  """
       -  BOUNDARY = '-M-A-G-I-C---B-O-U-N-D-A-R-Y-'
       -  CRLF = '\r\n'
       -  lines = []
       -  for (key, value) in fields:
       -    lines.append('--' + BOUNDARY)
       -    lines.append('Content-Disposition: form-data; name="%s"' % key)
       -    lines.append('')
       -    if type(value) == unicode:
       -      value = value.encode("utf-8")
       -    lines.append(value)
       -  for (key, filename, value) in files:
       -    if type(filename) == unicode:
       -      filename = filename.encode("utf-8")
       -    if type(value) == unicode:
       -      value = value.encode("utf-8")
       -    lines.append('--' + BOUNDARY)
       -    lines.append('Content-Disposition: form-data; name="%s"; filename="%s"' %
       -             (key, filename))
       -    lines.append('Content-Type: %s' % GetContentType(filename))
       -    lines.append('')
       -    lines.append(value)
       -  lines.append('--' + BOUNDARY + '--')
       -  lines.append('')
       -  body = CRLF.join(lines)
       -  content_type = 'multipart/form-data; boundary=%s' % BOUNDARY
       -  return content_type, body
       +        """Encode form fields for multipart/form-data.
       +
       +        Args:
       +                fields: A sequence of (name, value) elements for regular form fields.
       +                files: A sequence of (name, filename, value) elements for data to be
       +                                        uploaded as files.
       +        Returns:
       +                (content_type, body) ready for httplib.HTTP instance.
       +
       +        Source:
       +                http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/146306
       +        """
       +        BOUNDARY = '-M-A-G-I-C---B-O-U-N-D-A-R-Y-'
       +        CRLF = '\r\n'
       +        lines = []
       +        for (key, value) in fields:
       +                typecheck(key, str)
       +                typecheck(value, str)
       +                lines.append('--' + BOUNDARY)
       +                lines.append('Content-Disposition: form-data; name="%s"' % key)
       +                lines.append('')
       +                lines.append(value)
       +        for (key, filename, value) in files:
       +                typecheck(key, str)
       +                typecheck(filename, str)
       +                typecheck(value, str)
       +                lines.append('--' + BOUNDARY)
       +                lines.append('Content-Disposition: form-data; name="%s"; filename="%s"' % (key, filename))
       +                lines.append('Content-Type: %s' % GetContentType(filename))
       +                lines.append('')
       +                lines.append(value)
       +        lines.append('--' + BOUNDARY + '--')
       +        lines.append('')
       +        body = CRLF.join(lines)
       +        content_type = 'multipart/form-data; boundary=%s' % BOUNDARY
       +        return content_type, body
        
        
        def GetContentType(filename):
       -  """Helper to guess the content-type from the filename."""
       -  return mimetypes.guess_type(filename)[0] or 'application/octet-stream'
       +        """Helper to guess the content-type from the filename."""
       +        return mimetypes.guess_type(filename)[0] or 'application/octet-stream'
        
        
        # Use a shell for subcommands on Windows to get a PATH search.
        use_shell = sys.platform.startswith("win")
        
        def RunShellWithReturnCode(command, print_output=False,
       -                           universal_newlines=True,
       -                           env=os.environ):
       -  """Executes a command and returns the output from stdout and the return code.
       -
       -  Args:
       -    command: Command to execute.
       -    print_output: If True, the output is printed to stdout.
       -                  If False, both stdout and stderr are ignored.
       -    universal_newlines: Use universal_newlines flag (default: True).
       -
       -  Returns:
       -    Tuple (output, return code)
       -  """
       -  logging.info("Running %s", command)
       -  p = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
       -                       shell=use_shell, universal_newlines=universal_newlines,
       -                       env=env)
       -  if print_output:
       -    output_array = []
       -    while True:
       -      line = p.stdout.readline()
       -      if not line:
       -        break
       -      print line.strip("\n")
       -      output_array.append(line)
       -    output = "".join(output_array)
       -  else:
       -    output = p.stdout.read()
       -  p.wait()
       -  errout = p.stderr.read()
       -  if print_output and errout:
       -    print >>sys.stderr, errout
       -  p.stdout.close()
       -  p.stderr.close()
       -  return output, p.returncode
       +                universal_newlines=True, env=os.environ):
       +        """Executes a command and returns the output from stdout and the return code.
       +
       +        Args:
       +                command: Command to execute.
       +                print_output: If True, the output is printed to stdout.
       +                        If False, both stdout and stderr are ignored.
       +                universal_newlines: Use universal_newlines flag (default: True).
       +
       +        Returns:
       +                Tuple (output, return code)
       +        """
       +        logging.info("Running %s", command)
       +        p = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
       +                shell=use_shell, universal_newlines=universal_newlines, env=env)
       +        if print_output:
       +                output_array = []
       +                while True:
       +                        line = p.stdout.readline()
       +                        if not line:
       +                                break
       +                        print line.strip("\n")
       +                        output_array.append(line)
       +                output = "".join(output_array)
       +        else:
       +                output = p.stdout.read()
       +        p.wait()
       +        errout = p.stderr.read()
       +        if print_output and errout:
       +                print >>sys.stderr, errout
       +        p.stdout.close()
       +        p.stderr.close()
       +        return output, p.returncode
        
        
        def RunShell(command, silent_ok=False, universal_newlines=True,
       -             print_output=False, env=os.environ):
       -  data, retcode = RunShellWithReturnCode(command, print_output,
       -                                         universal_newlines, env)
       -  if retcode:
       -    ErrorExit("Got error status from %s:\n%s" % (command, data))
       -  if not silent_ok and not data:
       -    ErrorExit("No output from %s" % command)
       -  return data
       +                print_output=False, env=os.environ):
       +        data, retcode = RunShellWithReturnCode(command, print_output, universal_newlines, env)
       +        if retcode:
       +                ErrorExit("Got error status from %s:\n%s" % (command, data))
       +        if not silent_ok and not data:
       +                ErrorExit("No output from %s" % command)
       +        return data
        
        
        class VersionControlSystem(object):
       -  """Abstract base class providing an interface to the VCS."""
       -
       -  def __init__(self, options):
       -    """Constructor.
       -
       -    Args:
       -      options: Command line options.
       -    """
       -    self.options = options
       -
       -  def GenerateDiff(self, args):
       -    """Return the current diff as a string.
       -
       -    Args:
       -      args: Extra arguments to pass to the diff command.
       -    """
       -    raise NotImplementedError(
       -        "abstract method -- subclass %s must override" % self.__class__)
       -
       -  def GetUnknownFiles(self):
       -    """Return a list of files unknown to the VCS."""
       -    raise NotImplementedError(
       -        "abstract method -- subclass %s must override" % self.__class__)
       -
       -  def CheckForUnknownFiles(self):
       -    """Show an "are you sure?" prompt if there are unknown files."""
       -    unknown_files = self.GetUnknownFiles()
       -    if unknown_files:
       -      print "The following files are not added to version control:"
       -      for line in unknown_files:
       -        print line
       -      prompt = "Are you sure to continue?(y/N) "
       -      answer = raw_input(prompt).strip()
       -      if answer != "y":
       -        ErrorExit("User aborted")
       -
       -  def GetBaseFile(self, filename):
       -    """Get the content of the upstream version of a file.
       -
       -    Returns:
       -      A tuple (base_content, new_content, is_binary, status)
       -        base_content: The contents of the base file.
       -        new_content: For text files, this is empty.  For binary files, this is
       -          the contents of the new file, since the diff output won't contain
       -          information to reconstruct the current file.
       -        is_binary: True iff the file is binary.
       -        status: The status of the file.
       -    """
       -
       -    raise NotImplementedError(
       -        "abstract method -- subclass %s must override" % self.__class__)
       -
       -
       -  def GetBaseFiles(self, diff):
       -    """Helper that calls GetBase file for each file in the patch.
       -
       -    Returns:
       -      A dictionary that maps from filename to GetBaseFile's tuple.  Filenames
       -      are retrieved based on lines that start with "Index:" or
       -      "Property changes on:".
       -    """
       -    files = {}
       -    for line in diff.splitlines(True):
       -      if line.startswith('Index:') or line.startswith('Property changes on:'):
       -        unused, filename = line.split(':', 1)
       -        # On Windows if a file has property changes its filename uses '\'
       -        # instead of '/'.
       -        filename = filename.strip().replace('\\', '/')
       -        files[filename] = self.GetBaseFile(filename)
       -    return files
       -
       -
       -  def UploadBaseFiles(self, issue, rpc_server, patch_list, patchset, options,
       -                      files):
       -    """Uploads the base files (and if necessary, the current ones as well)."""
       -
       -    def UploadFile(filename, file_id, content, is_binary, status, is_base):
       -      """Uploads a file to the server."""
       -      file_too_large = False
       -      if is_base:
       -        type = "base"
       -      else:
       -        type = "current"
       -      if len(content) > MAX_UPLOAD_SIZE:
       -        print ("Not uploading the %s file for %s because it's too large." %
       -               (type, filename))
       -        file_too_large = True
       -        content = ""
       -      checksum = md5(content).hexdigest()
       -      if options.verbose > 0 and not file_too_large:
       -        print "Uploading %s file for %s" % (type, filename)
       -      url = "/%d/upload_content/%d/%d" % (int(issue), int(patchset), file_id)
       -      form_fields = [("filename", filename),
       -                     ("status", status),
       -                     ("checksum", checksum),
       -                     ("is_binary", str(is_binary)),
       -                     ("is_current", str(not is_base)),
       -                    ]
       -      if file_too_large:
       -        form_fields.append(("file_too_large", "1"))
       -      if options.email:
       -        form_fields.append(("user", options.email))
       -      ctype, body = EncodeMultipartFormData(form_fields,
       -                                            [("data", filename, content)])
       -      response_body = rpc_server.Send(url, body,
       -                                      content_type=ctype)
       -      if not response_body.startswith("OK"):
       -        StatusUpdate("  --> %s" % response_body)
       -        sys.exit(1)
       -
       -    patches = dict()
       -    [patches.setdefault(v, k) for k, v in patch_list]
       -    for filename in patches.keys():
       -      base_content, new_content, is_binary, status = files[filename]
       -      file_id_str = patches.get(filename)
       -      if file_id_str.find("nobase") != -1:
       -        base_content = None
       -        file_id_str = file_id_str[file_id_str.rfind("_") + 1:]
       -      file_id = int(file_id_str)
       -      if base_content != None:
       -        UploadFile(filename, file_id, base_content, is_binary, status, True)
       -      if new_content != None:
       -        UploadFile(filename, file_id, new_content, is_binary, status, False)
       -
       -  def IsImage(self, filename):
       -    """Returns true if the filename has an image extension."""
       -    mimetype =  mimetypes.guess_type(filename)[0]
       -    if not mimetype:
       -      return False
       -    return mimetype.startswith("image/")
       -
       -  def IsBinary(self, filename):
       -    """Returns true if the guessed mimetyped isnt't in text group."""
       -    mimetype = mimetypes.guess_type(filename)[0]
       -    if not mimetype:
       -      return False  # e.g. README, "real" binaries usually have an extension
       -    # special case for text files which don't start with text/
       -    if mimetype in TEXT_MIMETYPES:
       -      return False
       -    return not mimetype.startswith("text/")
       -
       -
       -class SubversionVCS(VersionControlSystem):
       -  """Implementation of the VersionControlSystem interface for Subversion."""
       -
       -  def __init__(self, options):
       -    super(SubversionVCS, self).__init__(options)
       -    if self.options.revision:
       -      match = re.match(r"(\d+)(:(\d+))?", self.options.revision)
       -      if not match:
       -        ErrorExit("Invalid Subversion revision %s." % self.options.revision)
       -      self.rev_start = match.group(1)
       -      self.rev_end = match.group(3)
       -    else:
       -      self.rev_start = self.rev_end = None
       -    # Cache output from "svn list -r REVNO dirname".
       -    # Keys: dirname, Values: 2-tuple (ouput for start rev and end rev).
       -    self.svnls_cache = {}
       -    # SVN base URL is required to fetch files deleted in an older revision.
       -    # Result is cached to not guess it over and over again in GetBaseFile().
       -    required = self.options.download_base or self.options.revision is not None
       -    self.svn_base = self._GuessBase(required)
       -
       -  def GuessBase(self, required):
       -    """Wrapper for _GuessBase."""
       -    return self.svn_base
       -
       -  def _GuessBase(self, required):
       -    """Returns the SVN base URL.
       -
       -    Args:
       -      required: If true, exits if the url can't be guessed, otherwise None is
       -        returned.
       -    """
       -    info = RunShell(["svn", "info"])
       -    for line in info.splitlines():
       -      words = line.split()
       -      if len(words) == 2 and words[0] == "URL:":
       -        url = words[1]
       -        scheme, netloc, path, params, query, fragment = urlparse.urlparse(url)
       -        username, netloc = urllib.splituser(netloc)
       -        if username:
       -          logging.info("Removed username from base URL")
       -        if netloc.endswith("svn.python.org"):
       -          if netloc == "svn.python.org":
       -            if path.startswith("/projects/"):
       -              path = path[9:]
       -          elif netloc != "pythondev@svn.python.org":
       -            ErrorExit("Unrecognized Python URL: %s" % url)
       -          base = "http://svn.python.org/view/*checkout*%s/" % path
       -          logging.info("Guessed Python base = %s", base)
       -        elif netloc.endswith("svn.collab.net"):
       -          if path.startswith("/repos/"):
       -            path = path[6:]
       -          base = "http://svn.collab.net/viewvc/*checkout*%s/" % path
       -          logging.info("Guessed CollabNet base = %s", base)
       -        elif netloc.endswith(".googlecode.com"):
       -          path = path + "/"
       -          base = urlparse.urlunparse(("http", netloc, path, params,
       -                                      query, fragment))
       -          logging.info("Guessed Google Code base = %s", base)
       -        else:
       -          path = path + "/"
       -          base = urlparse.urlunparse((scheme, netloc, path, params,
       -                                      query, fragment))
       -          logging.info("Guessed base = %s", base)
       -        return base
       -    if required:
       -      ErrorExit("Can't find URL in output from svn info")
       -    return None
       -
       -  def GenerateDiff(self, args):
       -    cmd = ["svn", "diff"]
       -    if self.options.revision:
       -      cmd += ["-r", self.options.revision]
       -    cmd.extend(args)
       -    data = RunShell(cmd)
       -    count = 0
       -    for line in data.splitlines():
       -      if line.startswith("Index:") or line.startswith("Property changes on:"):
       -        count += 1
       -        logging.info(line)
       -    if not count:
       -      ErrorExit("No valid patches found in output from svn diff")
       -    return data
       -
       -  def _CollapseKeywords(self, content, keyword_str):
       -    """Collapses SVN keywords."""
       -    # svn cat translates keywords but svn diff doesn't. As a result of this
       -    # behavior patching.PatchChunks() fails with a chunk mismatch error.
       -    # This part was originally written by the Review Board development team
       -    # who had the same problem (http://reviews.review-board.org/r/276/).
       -    # Mapping of keywords to known aliases
       -    svn_keywords = {
       -      # Standard keywords
       -      'Date':                ['Date', 'LastChangedDate'],
       -      'Revision':            ['Revision', 'LastChangedRevision', 'Rev'],
       -      'Author':              ['Author', 'LastChangedBy'],
       -      'HeadURL':             ['HeadURL', 'URL'],
       -      'Id':                  ['Id'],
       -
       -      # Aliases
       -      'LastChangedDate':     ['LastChangedDate', 'Date'],
       -      'LastChangedRevision': ['LastChangedRevision', 'Rev', 'Revision'],
       -      'LastChangedBy':       ['LastChangedBy', 'Author'],
       -      'URL':                 ['URL', 'HeadURL'],
       -    }
       -
       -    def repl(m):
       -       if m.group(2):
       -         return "$%s::%s$" % (m.group(1), " " * len(m.group(3)))
       -       return "$%s$" % m.group(1)
       -    keywords = [keyword
       -                for name in keyword_str.split(" ")
       -                for keyword in svn_keywords.get(name, [])]
       -    return re.sub(r"\$(%s):(:?)([^\$]+)\$" % '|'.join(keywords), repl, content)
       -
       -  def GetUnknownFiles(self):
       -    status = RunShell(["svn", "status", "--ignore-externals"], silent_ok=True)
       -    unknown_files = []
       -    for line in status.split("\n"):
       -      if line and line[0] == "?":
       -        unknown_files.append(line)
       -    return unknown_files
       -
       -  def ReadFile(self, filename):
       -    """Returns the contents of a file."""
       -    file = open(filename, 'rb')
       -    result = ""
       -    try:
       -      result = file.read()
       -    finally:
       -      file.close()
       -    return result
       -
       -  def GetStatus(self, filename):
       -    """Returns the status of a file."""
       -    if not self.options.revision:
       -      status = RunShell(["svn", "status", "--ignore-externals", filename])
       -      if not status:
       -        ErrorExit("svn status returned no output for %s" % filename)
       -      status_lines = status.splitlines()
       -      # If file is in a cl, the output will begin with
       -      # "\n--- Changelist 'cl_name':\n".  See
       -      # http://svn.collab.net/repos/svn/trunk/notes/changelist-design.txt
       -      if (len(status_lines) == 3 and
       -          not status_lines[0] and
       -          status_lines[1].startswith("--- Changelist")):
       -        status = status_lines[2]
       -      else:
       -        status = status_lines[0]
       -    # If we have a revision to diff against we need to run "svn list"
       -    # for the old and the new revision and compare the results to get
       -    # the correct status for a file.
       -    else:
       -      dirname, relfilename = os.path.split(filename)
       -      if dirname not in self.svnls_cache:
       -        cmd = ["svn", "list", "-r", self.rev_start, dirname or "."]
       -        out, returncode = RunShellWithReturnCode(cmd)
       -        if returncode:
       -          ErrorExit("Failed to get status for %s." % filename)
       -        old_files = out.splitlines()
       -        args = ["svn", "list"]
       -        if self.rev_end:
       -          args += ["-r", self.rev_end]
       -        cmd = args + [dirname or "."]
       -        out, returncode = RunShellWithReturnCode(cmd)
       -        if returncode:
       -          ErrorExit("Failed to run command %s" % cmd)
       -        self.svnls_cache[dirname] = (old_files, out.splitlines())
       -      old_files, new_files = self.svnls_cache[dirname]
       -      if relfilename in old_files and relfilename not in new_files:
       -        status = "D   "
       -      elif relfilename in old_files and relfilename in new_files:
       -        status = "M   "
       -      else:
       -        status = "A   "
       -    return status
       -
       -  def GetBaseFile(self, filename):
       -    status = self.GetStatus(filename)
       -    base_content = None
       -    new_content = None
       -
       -    # If a file is copied its status will be "A  +", which signifies
       -    # "addition-with-history".  See "svn st" for more information.  We need to
       -    # upload the original file or else diff parsing will fail if the file was
       -    # edited.
       -    if status[0] == "A" and status[3] != "+":
       -      # We'll need to upload the new content if we're adding a binary file
       -      # since diff's output won't contain it.
       -      mimetype = RunShell(["svn", "propget", "svn:mime-type", filename],
       -                          silent_ok=True)
       -      base_content = ""
       -      is_binary = bool(mimetype) and not mimetype.startswith("text/")
       -      if is_binary and self.IsImage(filename):
       -        new_content = self.ReadFile(filename)
       -    elif (status[0] in ("M", "D", "R") or
       -          (status[0] == "A" and status[3] == "+") or  # Copied file.
       -          (status[0] == " " and status[1] == "M")):  # Property change.
       -      args = []
       -      if self.options.revision:
       -        url = "%s/%s@%s" % (self.svn_base, filename, self.rev_start)
       -      else:
       -        # Don't change filename, it's needed later.
       -        url = filename
       -        args += ["-r", "BASE"]
       -      cmd = ["svn"] + args + ["propget", "svn:mime-type", url]
       -      mimetype, returncode = RunShellWithReturnCode(cmd)
       -      if returncode:
       -        # File does not exist in the requested revision.
       -        # Reset mimetype, it contains an error message.
       -        mimetype = ""
       -      get_base = False
       -      is_binary = bool(mimetype) and not mimetype.startswith("text/")
       -      if status[0] == " ":
       -        # Empty base content just to force an upload.
       -        base_content = ""
       -      elif is_binary:
       -        if self.IsImage(filename):
       -          get_base = True
       -          if status[0] == "M":
       -            if not self.rev_end:
       -              new_content = self.ReadFile(filename)
       -            else:
       -              url = "%s/%s@%s" % (self.svn_base, filename, self.rev_end)
       -              new_content = RunShell(["svn", "cat", url],
       -                                     universal_newlines=True, silent_ok=True)
       -        else:
       -          base_content = ""
       -      else:
       -        get_base = True
       -
       -      if get_base:
       -        if is_binary:
       -          universal_newlines = False
       -        else:
       -          universal_newlines = True
       -        if self.rev_start:
       -          # "svn cat -r REV delete_file.txt" doesn't work. cat requires
       -          # the full URL with "@REV" appended instead of using "-r" option.
       -          url = "%s/%s@%s" % (self.svn_base, filename, self.rev_start)
       -          base_content = RunShell(["svn", "cat", url],
       -                                  universal_newlines=universal_newlines,
       -                                  silent_ok=True)
       -        else:
       -          base_content = RunShell(["svn", "cat", filename],
       -                                  universal_newlines=universal_newlines,
       -                                  silent_ok=True)
       -        if not is_binary:
       -          args = []
       -          if self.rev_start:
       -            url = "%s/%s@%s" % (self.svn_base, filename, self.rev_start)
       -          else:
       -            url = filename
       -            args += ["-r", "BASE"]
       -          cmd = ["svn"] + args + ["propget", "svn:keywords", url]
       -          keywords, returncode = RunShellWithReturnCode(cmd)
       -          if keywords and not returncode:
       -            base_content = self._CollapseKeywords(base_content, keywords)
       -    else:
       -      StatusUpdate("svn status returned unexpected output: %s" % status)
       -      sys.exit(1)
       -    return base_content, new_content, is_binary, status[0:5]
       -
       -
       -class GitVCS(VersionControlSystem):
       -  """Implementation of the VersionControlSystem interface for Git."""
       -
       -  def __init__(self, options):
       -    super(GitVCS, self).__init__(options)
       -    # Map of filename -> (hash before, hash after) of base file.
       -    # Hashes for "no such file" are represented as None.
       -    self.hashes = {}
       -    # Map of new filename -> old filename for renames.
       -    self.renames = {}
       -
       -  def GenerateDiff(self, extra_args):
       -    # This is more complicated than svn's GenerateDiff because we must convert
       -    # the diff output to include an svn-style "Index:" line as well as record
       -    # the hashes of the files, so we can upload them along with our diff.
       -
       -    # Special used by git to indicate "no such content".
       -    NULL_HASH = "0"*40
       -
       -    extra_args = extra_args[:]
       -    if self.options.revision:
       -      extra_args = [self.options.revision] + extra_args
       -    extra_args.append('-M')
       -
       -    # --no-ext-diff is broken in some versions of Git, so try to work around
       -    # this by overriding the environment (but there is still a problem if the
       -    # git config key "diff.external" is used).
       -    env = os.environ.copy()
       -    if 'GIT_EXTERNAL_DIFF' in env: del env['GIT_EXTERNAL_DIFF']
       -    gitdiff = RunShell(["git", "diff", "--no-ext-diff", "--full-index"]
       -                       + extra_args, env=env)
       -    svndiff = []
       -    filecount = 0
       -    filename = None
       -    for line in gitdiff.splitlines():
       -      match = re.match(r"diff --git a/(.*) b/(.*)$", line)
       -      if match:
       -        filecount += 1
       -        # Intentionally use the "after" filename so we can show renames.
       -        filename = match.group(2)
       -        svndiff.append("Index: %s\n" % filename)
       -        if match.group(1) != match.group(2):
       -          self.renames[match.group(2)] = match.group(1)
       -      else:
       -        # The "index" line in a git diff looks like this (long hashes elided):
       -        #   index 82c0d44..b2cee3f 100755
       -        # We want to save the left hash, as that identifies the base file.
       -        match = re.match(r"index (\w+)\.\.(\w+)", line)
       -        if match:
       -          before, after = (match.group(1), match.group(2))
       -          if before == NULL_HASH:
       -            before = None
       -          if after == NULL_HASH:
       -            after = None
       -          self.hashes[filename] = (before, after)
       -      svndiff.append(line + "\n")
       -    if not filecount:
       -      ErrorExit("No valid patches found in output from git diff")
       -    return "".join(svndiff)
       -
       -  def GetUnknownFiles(self):
       -    status = RunShell(["git", "ls-files", "--exclude-standard", "--others"],
       -                      silent_ok=True)
       -    return status.splitlines()
       -
       -  def GetFileContent(self, file_hash, is_binary):
       -    """Returns the content of a file identified by its git hash."""
       -    data, retcode = RunShellWithReturnCode(["git", "show", file_hash],
       -                                            universal_newlines=not is_binary)
       -    if retcode:
       -      ErrorExit("Got error status from 'git show %s'" % file_hash)
       -    return data
       -
       -  def GetBaseFile(self, filename):
       -    hash_before, hash_after = self.hashes.get(filename, (None,None))
       -    base_content = None
       -    new_content = None
       -    is_binary = self.IsBinary(filename)
       -    status = None
       -
       -    if filename in self.renames:
       -      status = "A +"  # Match svn attribute name for renames.
       -      if filename not in self.hashes:
       -        # If a rename doesn't change the content, we never get a hash.
       -        base_content = RunShell(["git", "show", filename])
       -    elif not hash_before:
       -      status = "A"
       -      base_content = ""
       -    elif not hash_after:
       -      status = "D"
       -    else:
       -      status = "M"
       -
       -    is_image = self.IsImage(filename)
       -
       -    # Grab the before/after content if we need it.
       -    # We should include file contents if it's text or it's an image.
       -    if not is_binary or is_image:
       -      # Grab the base content if we don't have it already.
       -      if base_content is None and hash_before:
       -        base_content = self.GetFileContent(hash_before, is_binary)
       -      # Only include the "after" file if it's an image; otherwise it
       -      # it is reconstructed from the diff.
       -      if is_image and hash_after:
       -        new_content = self.GetFileContent(hash_after, is_binary)
       -
       -    return (base_content, new_content, is_binary, status)
       +        """Abstract base class providing an interface to the VCS."""
       +
       +        def __init__(self, options):
       +                """Constructor.
       +
       +                Args:
       +                        options: Command line options.
       +                """
       +                self.options = options
       +
       +        def GenerateDiff(self, args):
       +                """Return the current diff as a string.
       +
       +                Args:
       +                        args: Extra arguments to pass to the diff command.
       +                """
       +                raise NotImplementedError(
       +                                "abstract method -- subclass %s must override" % self.__class__)
       +
       +        def GetUnknownFiles(self):
       +                """Return a list of files unknown to the VCS."""
       +                raise NotImplementedError(
       +                                "abstract method -- subclass %s must override" % self.__class__)
       +
       +        def CheckForUnknownFiles(self):
       +                """Show an "are you sure?" prompt if there are unknown files."""
       +                unknown_files = self.GetUnknownFiles()
       +                if unknown_files:
       +                        print "The following files are not added to version control:"
       +                        for line in unknown_files:
       +                                print line
       +                        prompt = "Are you sure to continue?(y/N) "
       +                        answer = raw_input(prompt).strip()
       +                        if answer != "y":
       +                                ErrorExit("User aborted")
       +
       +        def GetBaseFile(self, filename):
       +                """Get the content of the upstream version of a file.
       +
       +                Returns:
       +                        A tuple (base_content, new_content, is_binary, status)
       +                                base_content: The contents of the base file.
       +                                new_content: For text files, this is empty.  For binary files, this is
       +                                        the contents of the new file, since the diff output won't contain
       +                                        information to reconstruct the current file.
       +                                is_binary: True iff the file is binary.
       +                                status: The status of the file.
       +                """
       +
       +                raise NotImplementedError(
       +                                "abstract method -- subclass %s must override" % self.__class__)
       +
       +
       +        def GetBaseFiles(self, diff):
       +                """Helper that calls GetBase file for each file in the patch.
       +
       +                Returns:
       +                        A dictionary that maps from filename to GetBaseFile's tuple.  Filenames
       +                        are retrieved based on lines that start with "Index:" or
       +                        "Property changes on:".
       +                """
       +                files = {}
       +                for line in diff.splitlines(True):
       +                        if line.startswith('Index:') or line.startswith('Property changes on:'):
       +                                unused, filename = line.split(':', 1)
       +                                # On Windows if a file has property changes its filename uses '\'
       +                                # instead of '/'.
       +                                filename = filename.strip().replace('\\', '/')
       +                                files[filename] = self.GetBaseFile(filename)
       +                return files
       +
       +
       +        def UploadBaseFiles(self, issue, rpc_server, patch_list, patchset, options,
       +                                                                                        files):
       +                """Uploads the base files (and if necessary, the current ones as well)."""
       +
       +                def UploadFile(filename, file_id, content, is_binary, status, is_base):
       +                        """Uploads a file to the server."""
       +                        set_status("uploading " + filename)
       +                        file_too_large = False
       +                        if is_base:
       +                                type = "base"
       +                        else:
       +                                type = "current"
       +                        if len(content) > MAX_UPLOAD_SIZE:
       +                                print ("Not uploading the %s file for %s because it's too large." %
       +                                                        (type, filename))
       +                                file_too_large = True
       +                                content = ""
       +                        checksum = md5(content).hexdigest()
       +                        if options.verbose > 0 and not file_too_large:
       +                                print "Uploading %s file for %s" % (type, filename)
       +                        url = "/%d/upload_content/%d/%d" % (int(issue), int(patchset), file_id)
       +                        form_fields = [
       +                                ("filename", filename),
       +                                ("status", status),
       +                                ("checksum", checksum),
       +                                ("is_binary", str(is_binary)),
       +                                ("is_current", str(not is_base)),
       +                        ]
       +                        if file_too_large:
       +                                form_fields.append(("file_too_large", "1"))
       +                        if options.email:
       +                                form_fields.append(("user", options.email))
       +                        ctype, body = EncodeMultipartFormData(form_fields, [("data", filename, content)])
       +                        response_body = rpc_server.Send(url, body, content_type=ctype)
       +                        if not response_body.startswith("OK"):
       +                                StatusUpdate("  --> %s" % response_body)
       +                                sys.exit(1)
       +
       +                # Don't want to spawn too many threads, nor do we want to
       +                # hit Rietveld too hard, or it will start serving 500 errors.
       +                # When 8 works, it's no better than 4, and sometimes 8 is
       +                # too many for Rietveld to handle.
       +                MAX_PARALLEL_UPLOADS = 4
       +
       +                sema = threading.BoundedSemaphore(MAX_PARALLEL_UPLOADS)
       +                upload_threads = []
       +                finished_upload_threads = []
       +                
       +                class UploadFileThread(threading.Thread):
       +                        def __init__(self, args):
       +                                threading.Thread.__init__(self)
       +                                self.args = args
       +                        def run(self):
       +                                UploadFile(*self.args)
       +                                finished_upload_threads.append(self)
       +                                sema.release()
       +
       +                def StartUploadFile(*args):
       +                        sema.acquire()
       +                        while len(finished_upload_threads) > 0:
       +                                t = finished_upload_threads.pop()
       +                                upload_threads.remove(t)
       +                                t.join()
       +                        t = UploadFileThread(args)
       +                        upload_threads.append(t)
       +                        t.start()
       +
       +                def WaitForUploads():                        
       +                        for t in upload_threads:
       +                                t.join()
       +
       +                patches = dict()
       +                [patches.setdefault(v, k) for k, v in patch_list]
       +                for filename in patches.keys():
       +                        base_content, new_content, is_binary, status = files[filename]
       +                        file_id_str = patches.get(filename)
       +                        if file_id_str.find("nobase") != -1:
       +                                base_content = None
       +                                file_id_str = file_id_str[file_id_str.rfind("_") + 1:]
       +                        file_id = int(file_id_str)
       +                        if base_content != None:
       +                                StartUploadFile(filename, file_id, base_content, is_binary, status, True)
       +                        if new_content != None:
       +                                StartUploadFile(filename, file_id, new_content, is_binary, status, False)
       +                WaitForUploads()
       +
       +        def IsImage(self, filename):
       +                """Returns true if the filename has an image extension."""
       +                mimetype =  mimetypes.guess_type(filename)[0]
       +                if not mimetype:
       +                        return False
       +                return mimetype.startswith("image/")
       +
       +        def IsBinary(self, filename):
       +                """Returns true if the guessed mimetyped isnt't in text group."""
       +                mimetype = mimetypes.guess_type(filename)[0]
       +                if not mimetype:
       +                        return False  # e.g. README, "real" binaries usually have an extension
       +                # special case for text files which don't start with text/
       +                if mimetype in TEXT_MIMETYPES:
       +                        return False
       +                return not mimetype.startswith("text/")
       +
       +class FakeMercurialUI(object):
       +        def __init__(self):
       +                self.quiet = True
       +                self.output = ''
       +        
       +        def write(self, *args, **opts):
       +                self.output += ' '.join(args)
        
       +use_hg_shell = False        # set to True to shell out to hg always; slower
        
        class MercurialVCS(VersionControlSystem):
       -  """Implementation of the VersionControlSystem interface for Mercurial."""
       -
       -  def __init__(self, options, repo_dir):
       -    super(MercurialVCS, self).__init__(options)
       -    # Absolute path to repository (we can be in a subdir)
       -    self.repo_dir = os.path.normpath(repo_dir)
       -    # Compute the subdir
       -    cwd = os.path.normpath(os.getcwd())
       -    assert cwd.startswith(self.repo_dir)
       -    self.subdir = cwd[len(self.repo_dir):].lstrip(r"\/")
       -    if self.options.revision:
       -      self.base_rev = self.options.revision
       -    else:
       -      mqparent, err = RunShellWithReturnCode(['hg', 'log', '--rev', 'qparent', '--template={node}'])
       -      if not err:
       -        self.base_rev = mqparent
       -      else:
       -        self.base_rev = RunShell(["hg", "parents", "-q"]).split(':')[1].strip()
       -  def _GetRelPath(self, filename):
       -    """Get relative path of a file according to the current directory,
       -    given its logical path in the repo."""
       -    assert filename.startswith(self.subdir), (filename, self.subdir)
       -    return filename[len(self.subdir):].lstrip(r"\/")
       -
       -  def GenerateDiff(self, extra_args):
       -    # If no file specified, restrict to the current subdir
       -    extra_args = extra_args or ["."]
       -    cmd = ["hg", "diff", "--git", "-r", self.base_rev] + extra_args
       -    data = RunShell(cmd, silent_ok=True)
       -    svndiff = []
       -    filecount = 0
       -    for line in data.splitlines():
       -      m = re.match("diff --git a/(\S+) b/(\S+)", line)
       -      if m:
       -        # Modify line to make it look like as it comes from svn diff.
       -        # With this modification no changes on the server side are required
       -        # to make upload.py work with Mercurial repos.
       -        # NOTE: for proper handling of moved/copied files, we have to use
       -        # the second filename.
       -        filename = m.group(2)
       -        svndiff.append("Index: %s" % filename)
       -        svndiff.append("=" * 67)
       -        filecount += 1
       -        logging.info(line)
       -      else:
       -        svndiff.append(line)
       -    if not filecount:
       -      ErrorExit("No valid patches found in output from hg diff")
       -    return "\n".join(svndiff) + "\n"
       -
       -  def GetUnknownFiles(self):
       -    """Return a list of files unknown to the VCS."""
       -    args = []
       -    status = RunShell(["hg", "status", "--rev", self.base_rev, "-u", "."],
       -        silent_ok=True)
       -    unknown_files = []
       -    for line in status.splitlines():
       -      st, fn = line.split(" ", 1)
       -      if st == "?":
       -        unknown_files.append(fn)
       -    return unknown_files
       -
       -  def GetBaseFile(self, filename):
       -    # "hg status" and "hg cat" both take a path relative to the current subdir
       -    # rather than to the repo root, but "hg diff" has given us the full path
       -    # to the repo root.
       -    base_content = ""
       -    new_content = None
       -    is_binary = False
       -    oldrelpath = relpath = self._GetRelPath(filename)
       -    # "hg status -C" returns two lines for moved/copied files, one otherwise
       -    out = RunShell(["hg", "status", "-C", "--rev", self.base_rev, relpath])
       -    out = out.splitlines()
       -    # HACK: strip error message about missing file/directory if it isn't in
       -    # the working copy
       -    if out[0].startswith('%s: ' % relpath):
       -      out = out[1:]
       -    status, what = out[0].split(' ', 1)
       -    if len(out) > 1 and status == "A" and what == relpath:
       -      oldrelpath = out[1].strip()
       -      status = "M"
       -    if ":" in self.base_rev:
       -      base_rev = self.base_rev.split(":", 1)[0]
       -    else:
       -      base_rev = self.base_rev
       -    if status != "A":
       -      base_content = RunShell(["hg", "cat", "-r", base_rev, oldrelpath],
       -        silent_ok=True)
       -      is_binary = "\0" in base_content  # Mercurial's heuristic
       -    if status != "R":
       -      new_content = open(relpath, "rb").read()
       -      is_binary = is_binary or "\0" in new_content
       -    if is_binary and base_content:
       -      # Fetch again without converting newlines
       -      base_content = RunShell(["hg", "cat", "-r", base_rev, oldrelpath],
       -        silent_ok=True, universal_newlines=False)
       -    if not is_binary or not self.IsImage(relpath):
       -      new_content = None
       -    return base_content, new_content, is_binary, status
       +        """Implementation of the VersionControlSystem interface for Mercurial."""
       +
       +        def __init__(self, options, ui, repo):
       +                super(MercurialVCS, self).__init__(options)
       +                self.ui = ui
       +                self.repo = repo
       +                # Absolute path to repository (we can be in a subdir)
       +                self.repo_dir = os.path.normpath(repo.root)
       +                # Compute the subdir
       +                cwd = os.path.normpath(os.getcwd())
       +                assert cwd.startswith(self.repo_dir)
       +                self.subdir = cwd[len(self.repo_dir):].lstrip(r"\/")
       +                if self.options.revision:
       +                        self.base_rev = self.options.revision
       +                else:
       +                        mqparent, err = RunShellWithReturnCode(['hg', 'log', '--rev', 'qparent', '--template={node}'])
       +                        if not err and mqparent != "":
       +                                self.base_rev = mqparent
       +                        else:
       +                                self.base_rev = RunShell(["hg", "parents", "-q"]).split(':')[1].strip()
       +        def _GetRelPath(self, filename):
       +                """Get relative path of a file according to the current directory,
       +                given its logical path in the repo."""
       +                assert filename.startswith(self.subdir), (filename, self.subdir)
       +                return filename[len(self.subdir):].lstrip(r"\/")
       +
       +        def GenerateDiff(self, extra_args):
       +                # If no file specified, restrict to the current subdir
       +                extra_args = extra_args or ["."]
       +                cmd = ["hg", "diff", "--git", "-r", self.base_rev] + extra_args
       +                data = RunShell(cmd, silent_ok=True)
       +                svndiff = []
       +                filecount = 0
       +                for line in data.splitlines():
       +                        m = re.match("diff --git a/(\S+) b/(\S+)", line)
       +                        if m:
       +                                # Modify line to make it look like as it comes from svn diff.
       +                                # With this modification no changes on the server side are required
       +                                # to make upload.py work with Mercurial repos.
       +                                # NOTE: for proper handling of moved/copied files, we have to use
       +                                # the second filename.
       +                                filename = m.group(2)
       +                                svndiff.append("Index: %s" % filename)
       +                                svndiff.append("=" * 67)
       +                                filecount += 1
       +                                logging.info(line)
       +                        else:
       +                                svndiff.append(line)
       +                if not filecount:
       +                        ErrorExit("No valid patches found in output from hg diff")
       +                return "\n".join(svndiff) + "\n"
       +
       +        def GetUnknownFiles(self):
       +                """Return a list of files unknown to the VCS."""
       +                args = []
       +                status = RunShell(["hg", "status", "--rev", self.base_rev, "-u", "."],
       +                                silent_ok=True)
       +                unknown_files = []
       +                for line in status.splitlines():
       +                        st, fn = line.split(" ", 1)
       +                        if st == "?":
       +                                unknown_files.append(fn)
       +                return unknown_files
       +
       +        def GetBaseFile(self, filename):
       +                set_status("inspecting " + filename)
       +                # "hg status" and "hg cat" both take a path relative to the current subdir
       +                # rather than to the repo root, but "hg diff" has given us the full path
       +                # to the repo root.
       +                base_content = ""
       +                new_content = None
       +                is_binary = False
       +                oldrelpath = relpath = self._GetRelPath(filename)
       +                # "hg status -C" returns two lines for moved/copied files, one otherwise
       +                if use_hg_shell:
       +                        out = RunShell(["hg", "status", "-C", "--rev", self.base_rev, relpath])
       +                else:
       +                        fui = FakeMercurialUI()
       +                        ret = commands.status(fui, self.repo, *[relpath], **{'rev': [self.base_rev], 'copies': True})
       +                        if ret:
       +                                raise util.Abort(ret)
       +                        out = fui.output
       +                out = out.splitlines()
       +                # HACK: strip error message about missing file/directory if it isn't in
       +                # the working copy
       +                if out[0].startswith('%s: ' % relpath):
       +                        out = out[1:]
       +                status, what = out[0].split(' ', 1)
       +                if len(out) > 1 and status == "A" and what == relpath:
       +                        oldrelpath = out[1].strip()
       +                        status = "M"
       +                if ":" in self.base_rev:
       +                        base_rev = self.base_rev.split(":", 1)[0]
       +                else:
       +                        base_rev = self.base_rev
       +                if status != "A":
       +                        if use_hg_shell:
       +                                base_content = RunShell(["hg", "cat", "-r", base_rev, oldrelpath], silent_ok=True)
       +                        else:
       +                                base_content = str(self.repo[base_rev][oldrelpath].data())
       +                        is_binary = "\0" in base_content  # Mercurial's heuristic
       +                if status != "R":
       +                        new_content = open(relpath, "rb").read()
       +                        is_binary = is_binary or "\0" in new_content
       +                if is_binary and base_content and use_hg_shell:
       +                        # Fetch again without converting newlines
       +                        base_content = RunShell(["hg", "cat", "-r", base_rev, oldrelpath],
       +                                silent_ok=True, universal_newlines=False)
       +                if not is_binary or not self.IsImage(relpath):
       +                        new_content = None
       +                return base_content, new_content, is_binary, status
        
        
        # NOTE: The SplitPatch function is duplicated in engine.py, keep them in sync.
        def SplitPatch(data):
       -  """Splits a patch into separate pieces for each file.
       -
       -  Args:
       -    data: A string containing the output of svn diff.
       -
       -  Returns:
       -    A list of 2-tuple (filename, text) where text is the svn diff output
       -      pertaining to filename.
       -  """
       -  patches = []
       -  filename = None
       -  diff = []
       -  for line in data.splitlines(True):
       -    new_filename = None
       -    if line.startswith('Index:'):
       -      unused, new_filename = line.split(':', 1)
       -      new_filename = new_filename.strip()
       -    elif line.startswith('Property changes on:'):
       -      unused, temp_filename = line.split(':', 1)
       -      # When a file is modified, paths use '/' between directories, however
       -      # when a property is modified '\' is used on Windows.  Make them the same
       -      # otherwise the file shows up twice.
       -      temp_filename = temp_filename.strip().replace('\\', '/')
       -      if temp_filename != filename:
       -        # File has property changes but no modifications, create a new diff.
       -        new_filename = temp_filename
       -    if new_filename:
       -      if filename and diff:
       -        patches.append((filename, ''.join(diff)))
       -      filename = new_filename
       -      diff = [line]
       -      continue
       -    if diff is not None:
       -      diff.append(line)
       -  if filename and diff:
       -    patches.append((filename, ''.join(diff)))
       -  return patches
       +        """Splits a patch into separate pieces for each file.
       +
       +        Args:
       +                data: A string containing the output of svn diff.
       +
       +        Returns:
       +                A list of 2-tuple (filename, text) where text is the svn diff output
       +                        pertaining to filename.
       +        """
       +        patches = []
       +        filename = None
       +        diff = []
       +        for line in data.splitlines(True):
       +                new_filename = None
       +                if line.startswith('Index:'):
       +                        unused, new_filename = line.split(':', 1)
       +                        new_filename = new_filename.strip()
       +                elif line.startswith('Property changes on:'):
       +                        unused, temp_filename = line.split(':', 1)
       +                        # When a file is modified, paths use '/' between directories, however
       +                        # when a property is modified '\' is used on Windows.  Make them the same
       +                        # otherwise the file shows up twice.
       +                        temp_filename = temp_filename.strip().replace('\\', '/')
       +                        if temp_filename != filename:
       +                                # File has property changes but no modifications, create a new diff.
       +                                new_filename = temp_filename
       +                if new_filename:
       +                        if filename and diff:
       +                                patches.append((filename, ''.join(diff)))
       +                        filename = new_filename
       +                        diff = [line]
       +                        continue
       +                if diff is not None:
       +                        diff.append(line)
       +        if filename and diff:
       +                patches.append((filename, ''.join(diff)))
       +        return patches
        
        
        def UploadSeparatePatches(issue, rpc_server, patchset, data, options):
       -  """Uploads a separate patch for each file in the diff output.
       -
       -  Returns a list of [patch_key, filename] for each file.
       -  """
       -  patches = SplitPatch(data)
       -  rv = []
       -  for patch in patches:
       -    if len(patch[1]) > MAX_UPLOAD_SIZE:
       -      print ("Not uploading the patch for " + patch[0] +
       -             " because the file is too large.")
       -      continue
       -    form_fields = [("filename", patch[0])]
       -    if not options.download_base:
       -      form_fields.append(("content_upload", "1"))
       -    files = [("data", "data.diff", patch[1])]
       -    ctype, body = EncodeMultipartFormData(form_fields, files)
       -    url = "/%d/upload_patch/%d" % (int(issue), int(patchset))
       -    print "Uploading patch for " + patch[0]
       -    response_body = rpc_server.Send(url, body, content_type=ctype)
       -    lines = response_body.splitlines()
       -    if not lines or lines[0] != "OK":
       -      StatusUpdate("  --> %s" % response_body)
       -      sys.exit(1)
       -    rv.append([lines[1], patch[0]])
       -  return rv
       -
       -
       -def GuessVCSName():
       -  """Helper to guess the version control system.
       -
       -  This examines the current directory, guesses which VersionControlSystem
       -  we're using, and returns an string indicating which VCS is detected.
       -
       -  Returns:
       -    A pair (vcs, output).  vcs is a string indicating which VCS was detected
       -    and is one of VCS_GIT, VCS_MERCURIAL, VCS_SUBVERSION, or VCS_UNKNOWN.
       -    output is a string containing any interesting output from the vcs
       -    detection routine, or None if there is nothing interesting.
       -  """
       -  # Mercurial has a command to get the base directory of a repository
       -  # Try running it, but don't die if we don't have hg installed.
       -  # NOTE: we try Mercurial first as it can sit on top of an SVN working copy.
       -  try:
       -    out, returncode = RunShellWithReturnCode(["hg", "root"])
       -    if returncode == 0:
       -      return (VCS_MERCURIAL, out.strip())
       -  except OSError, (errno, message):
       -    if errno != 2:  # ENOENT -- they don't have hg installed.
       -      raise
       -
       -  # Subversion has a .svn in all working directories.
       -  if os.path.isdir('.svn'):
       -    logging.info("Guessed VCS = Subversion")
       -    return (VCS_SUBVERSION, None)
       -
       -  # Git has a command to test if you're in a git tree.
       -  # Try running it, but don't die if we don't have git installed.
       -  try:
       -    out, returncode = RunShellWithReturnCode(["git", "rev-parse",
       -                                              "--is-inside-work-tree"])
       -    if returncode == 0:
       -      return (VCS_GIT, None)
       -  except OSError, (errno, message):
       -    if errno != 2:  # ENOENT -- they don't have git installed.
       -      raise
       -
       -  return (VCS_UNKNOWN, None)
       -
       -
       -def GuessVCS(options):
       -  """Helper to guess the version control system.
       -
       -  This verifies any user-specified VersionControlSystem (by command line
       -  or environment variable).  If the user didn't specify one, this examines
       -  the current directory, guesses which VersionControlSystem we're using,
       -  and returns an instance of the appropriate class.  Exit with an error
       -  if we can't figure it out.
       -
       -  Returns:
       -    A VersionControlSystem instance. Exits if the VCS can't be guessed.
       -  """
       -  vcs = options.vcs
       -  if not vcs:
       -    vcs = os.environ.get("CODEREVIEW_VCS")
       -  if vcs:
       -    v = VCS_ABBREVIATIONS.get(vcs.lower())
       -    if v is None:
       -      ErrorExit("Unknown version control system %r specified." % vcs)
       -    (vcs, extra_output) = (v, None)
       -  else:
       -    (vcs, extra_output) = GuessVCSName()
       -
       -  if vcs == VCS_MERCURIAL:
       -    if extra_output is None:
       -      extra_output = RunShell(["hg", "root"]).strip()
       -    return MercurialVCS(options, extra_output)
       -  elif vcs == VCS_SUBVERSION:
       -    return SubversionVCS(options)
       -  elif vcs == VCS_GIT:
       -    return GitVCS(options)
       -
       -  ErrorExit(("Could not guess version control system. "
       -             "Are you in a working copy directory?"))
       -
       -
       -def RealMain(argv, data=None):
       -  """The real main function.
       -
       -  Args:
       -    argv: Command line arguments.
       -    data: Diff contents. If None (default) the diff is generated by
       -      the VersionControlSystem implementation returned by GuessVCS().
       -
       -  Returns:
       -    A 2-tuple (issue id, patchset id).
       -    The patchset id is None if the base files are not uploaded by this
       -    script (applies only to SVN checkouts).
       -  """
       -  logging.basicConfig(format=("%(asctime).19s %(levelname)s %(filename)s:"
       -                              "%(lineno)s %(message)s "))
       -  os.environ['LC_ALL'] = 'C'
       -  options, args = parser.parse_args(argv[1:])
       -  global verbosity
       -  verbosity = options.verbose
       -  if verbosity >= 3:
       -    logging.getLogger().setLevel(logging.DEBUG)
       -  elif verbosity >= 2:
       -    logging.getLogger().setLevel(logging.INFO)
       -  vcs = GuessVCS(options)
       -  if isinstance(vcs, SubversionVCS):
       -    # base field is only allowed for Subversion.
       -    # Note: Fetching base files may become deprecated in future releases.
       -    base = vcs.GuessBase(options.download_base)
       -  else:
       -    base = None
       -  if not base and options.download_base:
       -    options.download_base = True
       -    logging.info("Enabled upload of base file")
       -  if not options.assume_yes:
       -    vcs.CheckForUnknownFiles()
       -  if data is None:
       -    data = vcs.GenerateDiff(args)
       -  files = vcs.GetBaseFiles(data)
       -  if verbosity >= 1:
       -    print "Upload server:", options.server, "(change with -s/--server)"
       -  if options.issue:
       -    prompt = "Message describing this patch set: "
       -  else:
       -    prompt = "New issue subject: "
       -  message = options.message or raw_input(prompt).strip()
       -  if not message:
       -    ErrorExit("A non-empty message is required")
       -  rpc_server = GetRpcServer(options)
       -  form_fields = [("subject", message)]
       -  if base:
       -    form_fields.append(("base", base))
       -  if options.issue:
       -    form_fields.append(("issue", str(options.issue)))
       -  if options.email:
       -    form_fields.append(("user", options.email))
       -  if options.reviewers:
       -    for reviewer in options.reviewers.split(','):
       -      if "@" in reviewer and not reviewer.split("@")[1].count(".") == 1:
       -        ErrorExit("Invalid email address: %s" % reviewer)
       -    form_fields.append(("reviewers", options.reviewers))
       -  if options.cc:
       -    for cc in options.cc.split(','):
       -      if "@" in cc and not cc.split("@")[1].count(".") == 1:
       -        ErrorExit("Invalid email address: %s" % cc)
       -    form_fields.append(("cc", options.cc))
       -  description = options.description
       -  if options.description_file:
       -    if options.description:
       -      ErrorExit("Can't specify description and description_file")
       -    file = open(options.description_file, 'r')
       -    description = file.read()
       -    file.close()
       -  if description:
       -    form_fields.append(("description", description))
       -  # Send a hash of all the base file so the server can determine if a copy
       -  # already exists in an earlier patchset.
       -  base_hashes = ""
       -  for file, info in files.iteritems():
       -    if not info[0] is None:
       -      checksum = md5(info[0]).hexdigest()
       -      if base_hashes:
       -        base_hashes += "|"
       -      base_hashes += checksum + ":" + file
       -  form_fields.append(("base_hashes", base_hashes))
       -  if options.private:
       -    if options.issue:
       -      print "Warning: Private flag ignored when updating an existing issue."
       -    else:
       -      form_fields.append(("private", "1"))
       -  # If we're uploading base files, don't send the email before the uploads, so
       -  # that it contains the file status.
       -  if options.send_mail and options.download_base:
       -    form_fields.append(("send_mail", "1"))
       -  if not options.download_base:
       -    form_fields.append(("content_upload", "1"))
       -  if len(data) > MAX_UPLOAD_SIZE:
       -    print "Patch is large, so uploading file patches separately."
       -    uploaded_diff_file = []
       -    form_fields.append(("separate_patches", "1"))
       -  else:
       -    uploaded_diff_file = [("data", "data.diff", data)]
       -  ctype, body = EncodeMultipartFormData(form_fields, uploaded_diff_file)
       -  response_body = rpc_server.Send("/upload", body, content_type=ctype)
       -  patchset = None
       -  if not options.download_base or not uploaded_diff_file:
       -    lines = response_body.splitlines()
       -    if len(lines) >= 2:
       -      msg = lines[0]
       -      patchset = lines[1].strip()
       -      patches = [x.split(" ", 1) for x in lines[2:]]
       -    else:
       -      msg = response_body
       -  else:
       -    msg = response_body
       -  if not response_body.startswith("Issue created.") and \
       -  not response_body.startswith("Issue updated."):
       -    print >>sys.stderr, msg
       -    sys.exit(0)
       -  issue = msg[msg.rfind("/")+1:]
       -
       -  if not uploaded_diff_file:
       -    result = UploadSeparatePatches(issue, rpc_server, patchset, data, options)
       -    if not options.download_base:
       -      patches = result
       -
       -  if not options.download_base:
       -    vcs.UploadBaseFiles(issue, rpc_server, patches, patchset, options, files)
       -    if options.send_mail:
       -      rpc_server.Send("/" + issue + "/mail", payload="")
       -  return issue, patchset
       -
       -
       -def main():
       -  try:
       -    RealMain(sys.argv)
       -  except KeyboardInterrupt:
       -    print
       -    StatusUpdate("Interrupted.")
       -    sys.exit(1)
       +        """Uploads a separate patch for each file in the diff output.
        
       +        Returns a list of [patch_key, filename] for each file.
       +        """
       +        patches = SplitPatch(data)
       +        rv = []
       +        for patch in patches:
       +                set_status("uploading patch for " + patch[0])
       +                if len(patch[1]) > MAX_UPLOAD_SIZE:
       +                        print ("Not uploading the patch for " + patch[0] +
       +                                " because the file is too large.")
       +                        continue
       +                form_fields = [("filename", patch[0])]
       +                if not options.download_base:
       +                        form_fields.append(("content_upload", "1"))
       +                files = [("data", "data.diff", patch[1])]
       +                ctype, body = EncodeMultipartFormData(form_fields, files)
       +                url = "/%d/upload_patch/%d" % (int(issue), int(patchset))
       +                print "Uploading patch for " + patch[0]
       +                response_body = rpc_server.Send(url, body, content_type=ctype)
       +                lines = response_body.splitlines()
       +                if not lines or lines[0] != "OK":
       +                        StatusUpdate("  --> %s" % response_body)
       +                        sys.exit(1)
       +                rv.append([lines[1], patch[0]])
       +        return rv