Changed Bitreich stagit-gopher to gemini protocol - stagit-gemini - Stagit for gemini protocol Openbsd
(HTM) git clone git://thinkerwim.org/stagit-gemini.git
(DIR) Log
(DIR) Files
(DIR) Refs
(DIR) README
(DIR) LICENSE
---
(DIR) commit b961d515cd77c6f8326d4c7e3f635f6a00fe50bf
(DIR) parent d8c4c2c3aa23b1237f15fc3ab539419c2368989e
(HTM) Author: Wim Stockman <wim@thinkerwim.org>
Date: Wed, 8 Mar 2023 21:52:34 +0100
Changed Bitreich stagit-gopher to gemini protocol
Diffstat:
M Makefile | 22 +++++++++++-----------
M README | 24 ++++++++++++------------
M example_create.sh | 14 +++++++-------
M example_post-receive.sh | 16 ++++++++--------
A file | 8 ++++++++
A stagit-gemini-index.1 | 43 ++++++++++++++++++++++++++++++
A stagit-gemini-index.c | 310 +++++++++++++++++++++++++++++++
A stagit-gemini.1 | 119 +++++++++++++++++++++++++++++++
A stagit-gemini.c | 1475 ++++++++++++++++++++++++++++++
9 files changed, 1993 insertions(+), 38 deletions(-)
---
(DIR) diff --git a/Makefile b/Makefile
@@ -1,6 +1,6 @@
.POSIX:
-NAME = stagit-gopher
+NAME = stagit-gemini
VERSION = 1.2
# paths
@@ -21,17 +21,17 @@ STAGIT_CPPFLAGS = -D_XOPEN_SOURCE=700 -D_DEFAULT_SOURCE -D_BSD_SOURCE
#STAGIT_CFLAGS += -DGIT_OPT_SET_OWNER_VALIDATION=-1
SRC = \
- stagit-gopher.c\
- stagit-gopher-index.c
+ stagit-gemini.c\
+ stagit-gemini-index.c
COMPATSRC = \
reallocarray.c\
strlcpy.c
BIN = \
- stagit-gopher\
- stagit-gopher-index
+ stagit-gemini\
+ stagit-gemini-index
MAN1 = \
- stagit-gopher.1\
- stagit-gopher-index.1
+ stagit-gemini.1\
+ stagit-gemini-index.1
DOC = \
LICENSE\
README
@@ -65,11 +65,11 @@ dist:
${OBJ}: ${HDR}
-stagit-gopher: stagit-gopher.o ${COMPATOBJ}
- ${CC} -o $@ stagit-gopher.o ${COMPATOBJ} ${STAGIT_LDFLAGS}
+stagit-gemini: stagit-gemini.o ${COMPATOBJ}
+ ${CC} -o $@ stagit-gemini.o ${COMPATOBJ} ${STAGIT_LDFLAGS}
-stagit-gopher-index: stagit-gopher-index.o ${COMPATOBJ}
- ${CC} -o $@ stagit-gopher-index.o ${COMPATOBJ} ${STAGIT_LDFLAGS}
+stagit-gemini-index: stagit-gemini-index.o ${COMPATOBJ}
+ ${CC} -o $@ stagit-gemini-index.o ${COMPATOBJ} ${STAGIT_LDFLAGS}
clean:
rm -f ${BIN} ${OBJ} ${NAME}-${VERSION}.tar.gz
(DIR) diff --git a/README b/README
@@ -1,9 +1,9 @@
-stagit-gopher
+stagit-gemini
-------------
-static git page generator for gopher.
+static git page generator for gemini.
-This generates pages in the geomyidae .gph file format:
+This generates pages in the geomyidae .gmi file format:
http://git.r-36.net/geomyidae
@@ -13,17 +13,17 @@ Usage
Make files per repository:
- $ mkdir -p gphroot/gphrepo1 && cd gphroot/gphrepo1
- $ stagit-gopher path/to/gitrepo1
+ $ mkdir -p gmiroot/gmirepo1 && cd gmiroot/gmirepo1
+ $ stagit-gemini path/to/gitrepo1
repeat for other repositories
$ ...
Make index file for repositories:
- $ cd gphroot
- $ stagit-gopher-index path/to/gitrepo1 \
+ $ cd gmiroot
+ $ stagit-gemini-index path/to/gitrepo1 \
path/to/gitrepo2 \
- path/to/gitrepo3 > index.gph
+ path/to/gitrepo3 > index.gmi
Build and install
@@ -39,14 +39,14 @@ Dependencies
- C compiler (C99).
- libc (tested with OpenBSD, FreeBSD, NetBSD, Linux: glibc and musl).
- libgit2 (v0.22+).
-- geomyidae (for .gph file serving).
+- geomyidae (for .gmi file serving).
- POSIX make (optional).
Documentation
-------------
-See man pages: stagit-gopher(1) and stagit-gopher-index(1).
+See man pages: stagit-gemini(1) and stagit-gemini-index(1).
Building a static binary
@@ -113,7 +113,7 @@ git post-receive hook (repo/.git/hooks/post-receive):
Create .tar.gz archives by tag
------------------------------
#!/bin/sh
- name="stagit-gopher"
+ name="stagit-gemini"
mkdir -p archives
git tag -l | while read -r t; do
f="archives/${name}-$(echo "${t}" | tr '/' '_').tar.gz"
@@ -138,7 +138,7 @@ Features
- Detect submodules (.gitmodules file) from HEAD and link it as a page.
- Atom feed of the commit log (atom.xml).
- Atom feed of the tags/refs (tags.xml).
-- Make index page for multiple repositories with stagit-gopher-index.
+- Make index page for multiple repositories with stagit-gemini-index.
- After generating the pages (relatively slow) serving the files is very fast,
simple and requires little resources (because the content is static), only
a geomyidae Gopher server is required.
(DIR) diff --git a/example_create.sh b/example_create.sh
@@ -8,20 +8,20 @@
# - write description in "description" file.
#
# Usage:
-# - mkdir -p gphdir && cd gphdir
+# - mkdir -p gmidir && cd gmidir
# - sh example_create.sh
# path must be absolute.
reposdir="/var/scm/git"
-gopherdir="/var/gopher"
+geminidir="/var/gemini"
stagitdir="/scm"
-destdir="${gopherdir}/${stagitdir}"
+destdir="${geminidir}/${stagitdir}"
# remove /'s at the end.
stagitdir=$(printf "%s" "${stagitdir}" | sed 's@[/]*$@@g')
# make index.
-stagit-gopher-index -b "${stagitdir}" "${reposdir}/"*/ > "${destdir}/index.gph"
+stagit-gemini-index -b "${stagitdir}" "${reposdir}/"*/ > "${destdir}/index.gmi"
# make files per repo.
for dir in "${reposdir}/"*/; do
@@ -32,11 +32,11 @@ for dir in "${reposdir}/"*/; do
mkdir -p "${destdir}/${d}"
cd "${destdir}/${d}" || continue
- stagit-gopher -b "${stagitdir}/${d}" -c ".cache" \
- -u "gopher://codemadness.org/1/git/$d/" "${reposdir}/${r}"
+ stagit-gemini -b "${stagitdir}/${d}" -c ".cache" \
+ -u "gemini://codemadness.org/1/git/$d/" "${reposdir}/${r}"
# symlinks
- ln -sf log.gph index.gph
+ ln -sf log.gmi index.gmi
echo "done"
done
(DIR) diff --git a/example_post-receive.sh b/example_post-receive.sh
@@ -21,10 +21,10 @@ fi
# paths must be absolute.
reposdir="/home/src/src"
dir="${reposdir}/${name}"
-gopherdir="/home/www/gopher"
+geminidir="/home/www/gemini"
stagitdir="/"
-destdir="${gopherdir}/${stagitdir}"
-cachefile=".gphcache"
+destdir="${geminidir}/${stagitdir}"
+cachefile=".gmicache"
# /config
if ! test -d "${dir}"; then
@@ -49,7 +49,7 @@ done
# strip .git suffix.
r=$(basename "${name}")
d=$(basename "${name}" ".git")
-printf "[%s] stagit .gph pages... " "${d}"
+printf "[%s] stagit .gmi pages... " "${d}"
mkdir -p "${destdir}/${d}"
cd "${destdir}/${d}" || exit 1
@@ -64,12 +64,12 @@ fi
stagitdir=$(printf "%s" "${stagitdir}" | sed 's@[/]*$@@g')
# make index.
-stagit-gopher-index -b "${stagitdir}" "${reposdir}/"*/ > "${destdir}/index.gph"
+stagit-gemini-index -b "${stagitdir}" "${reposdir}/"*/ > "${destdir}/index.gmi"
# make pages.
-stagit-gopher -b "${stagitdir}/${d}" -c "${cachefile}" \
- -u "gopher://codemadness.org/1/git/$d/" "${reposdir}/${r}"
+stagit-gemini -b "${stagitdir}/${d}" -c "${cachefile}" \
+ -u "gemini://codemadness.org/1/git/$d/" "${reposdir}/${r}"
-ln -sf log.gph index.gph
+ln -sf log.gmi index.gmi
echo "done"
(DIR) diff --git a/file b/file
@@ -0,0 +1,8 @@
+mv stagit-gemini stagit-gemini
+mv stagit-gemini-index stagit-gemini-index
+mv stagit-gemini-index.1 stagit-gemini-index.1
+mv stagit-gemini-index.c stagit-gemini-index.c
+mv stagit-gemini-index.o stagit-gemini-index.o
+mv stagit-gemini.1 stagit-gemini.1
+mv stagit-gemini.c stagit-gemini.c
+mv stagit-gemini.o stagit-gemini.o
(DIR) diff --git a/stagit-gemini-index.1 b/stagit-gemini-index.1
@@ -0,0 +1,43 @@
+.Dd August 2, 2021
+.Dt STAGIT-GOPHER-INDEX 1
+.Os
+.Sh NAME
+.Nm stagit-gemini-index
+.Nd static git Gopher index generator
+.Sh SYNOPSIS
+.Nm
+.Op Fl b Ar baseprefix
+.Op Ar repodir...
+.Sh DESCRIPTION
+.Nm
+will create a Gopher index for the repositories specified and writes
+the Gopher data to stdout.
+The repos in the index are in the same order as the arguments
+.Ar repodir
+specified.
+.Pp
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl b Ar baseprefix
+Use base prefix as the root.
+By default this is "/".
+.El
+.Pp
+The basename of the directory is used as the repository name.
+The suffix ".git" is removed from the basename, this suffix is commonly used
+for "bare" repos.
+.Pp
+The content of the follow files specifies the meta data for each repository:
+.Bl -tag -width Ds
+.It .git/description or description (bare repos).
+description
+.El
+.Sh EXAMPLES
+.Bd -literal
+cd gmiroot
+stagit-gemini-index path/to/gitrepo1 path/to/gitrepo2 > index.gmi
+.Ed
+.Sh SEE ALSO
+.Xr stagit-gemini 1
+.Sh AUTHORS
+.An Hiltjo Posthuma Aq Mt hiltjo@codemadness.org
(DIR) diff --git a/stagit-gemini-index.c b/stagit-gemini-index.c
@@ -0,0 +1,310 @@
+#include <err.h>
+#include <locale.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <wchar.h>
+
+#include <git2.h>
+
+#define PAD_TRUNCATE_SYMBOL "\xe2\x80\xa6" /* symbol: "ellipsis" */
+#define UTF_INVALID_SYMBOL "\xef\xbf\xbd" /* symbol: "replacement" */
+
+static git_repository *repo;
+
+static const char *relpath = "";
+
+static char description[255] = "Repositories";
+static char *name = "";
+
+/* Handle read or write errors for a FILE * stream */
+void
+checkfileerror(FILE *fp, const char *name, int mode)
+{
+ if (mode == 'r' && ferror(fp))
+ errx(1, "read error: %s", name);
+ else if (mode == 'w' && (fflush(fp) || ferror(fp)))
+ errx(1, "write error: %s", name);
+}
+
+/* Format `len' columns of characters. If string is shorter pad the rest
+ * with characters `pad`. */
+int
+utf8pad(char *buf, size_t bufsiz, const char *s, size_t len, int pad)
+{
+ wchar_t wc;
+ size_t col = 0, i, slen, siz = 0;
+ int inc, rl, w;
+
+ if (!bufsiz)
+ return -1;
+ if (!len) {
+ buf[0] = '\0';
+ return 0;
+ }
+
+ slen = strlen(s);
+ for (i = 0; i < slen; i += inc) {
+ inc = 1; /* next byte */
+ if ((unsigned char)s[i] < 32)
+ continue;
+
+ rl = mbtowc(&wc, &s[i], slen - i < 4 ? slen - i : 4);
+ inc = rl;
+ if (rl < 0) {
+ mbtowc(NULL, NULL, 0); /* reset state */
+ inc = 1; /* invalid, seek next byte */
+ w = 1; /* replacement char is one width */
+ } else if ((w = wcwidth(wc)) == -1) {
+ continue;
+ }
+
+ if (col + w > len || (col + w == len && s[i + inc])) {
+ if (siz + 4 >= bufsiz)
+ return -1;
+ memcpy(&buf[siz], PAD_TRUNCATE_SYMBOL, sizeof(PAD_TRUNCATE_SYMBOL) - 1);
+ siz += sizeof(PAD_TRUNCATE_SYMBOL) - 1;
+ buf[siz] = '\0';
+ col++;
+ break;
+ } else if (rl < 0) {
+ if (siz + 4 >= bufsiz)
+ return -1;
+ memcpy(&buf[siz], UTF_INVALID_SYMBOL, sizeof(UTF_INVALID_SYMBOL) - 1);
+ siz += sizeof(UTF_INVALID_SYMBOL) - 1;
+ buf[siz] = '\0';
+ col++;
+ continue;
+ }
+ if (siz + inc + 1 >= bufsiz)
+ return -1;
+ memcpy(&buf[siz], &s[i], inc);
+ siz += inc;
+ buf[siz] = '\0';
+ col += w;
+ }
+
+ len -= col;
+ if (siz + len + 1 >= bufsiz)
+ return -1;
+ memset(&buf[siz], pad, len);
+ siz += len;
+ buf[siz] = '\0';
+
+ return 0;
+}
+
+/* Escape characters in text in geomyidae .gmi format,
+ newlines are ignored */
+void
+gmitext(FILE *fp, const char *s, size_t len)
+{
+ size_t i;
+
+ for (i = 0; *s && i < len; s++, i++) {
+ switch (*s) {
+ case '\r': /* ignore CR */
+ case '\n': /* ignore LF */
+ break;
+ default:
+ putc(*s, fp);
+ break;
+ }
+ }
+}
+
+/* Escape characters in links in geomyidae .gmi format */
+void
+gmilink(FILE *fp, const char *s, size_t len)
+{
+ size_t i;
+
+ for (i = 0; *s && i < len; s++, i++) {
+ switch (*s) {
+ case '\r': /* ignore CR */
+ case '\n': /* ignore LF */
+ break;
+ default:
+ putc(*s, fp);
+ break;
+ }
+ }
+}
+
+void
+joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
+{
+ int r;
+
+ r = snprintf(buf, bufsiz, "%s%s%s",
+ path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
+ if (r < 0 || (size_t)r >= bufsiz)
+ errx(1, "path truncated: '%s%s%s'",
+ path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
+}
+
+void
+printtimeshort(FILE *fp, const git_time *intime)
+{
+ struct tm *intm;
+ time_t t;
+ char out[32];
+
+ t = (time_t)intime->time;
+ if (!(intm = gmtime(&t)))
+ return;
+ strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
+ fputs(out, fp);
+}
+
+void
+writeheader(FILE *fp)
+{
+ if (description[0]) {
+ fputs(description, fp);
+ fputs("\n\n", fp);
+ }
+
+ fprintf(fp, "%-20.20s ", "Name");
+ fprintf(fp, "%-39.39s ", "Description");
+ fprintf(fp, "%s\n", "Last commit");
+}
+
+int
+writelog(FILE *fp)
+{
+ git_commit *commit = NULL;
+ const git_signature *author;
+ git_revwalk *w = NULL;
+ git_oid id;
+ char *stripped_name = NULL, *p;
+ char buf[1024];
+ int ret = 0;
+
+ git_revwalk_new(&w, repo);
+ git_revwalk_push_head(w);
+
+ if (git_revwalk_next(&id, w) ||
+ git_commit_lookup(&commit, repo, &id)) {
+ ret = -1;
+ goto err;
+ }
+
+ author = git_commit_author(commit);
+
+ /* strip .git suffix */
+ if (!(stripped_name = strdup(name)))
+ err(1, "strdup");
+ if ((p = strrchr(stripped_name, '.')))
+ if (!strcmp(p, ".git"))
+ *p = '\0';
+
+ fprintf(fp, "=> %s/%s/log.gmi ", relpath, stripped_name);
+ utf8pad(buf, sizeof(buf), stripped_name, 20, ' ');
+ gmilink(fp, buf, strlen(buf));
+ fputs(" ", fp);
+ utf8pad(buf, sizeof(buf), description, 39, ' ');
+ gmilink(fp, buf, strlen(buf));
+ fputs(" ", fp);
+ if (author)
+ printtimeshort(fp, &(author->when));
+ fputc('\n', fp);
+
+ git_commit_free(commit);
+err:
+ git_revwalk_free(w);
+ free(stripped_name);
+
+ return ret;
+}
+
+void
+usage(const char *argv0)
+{
+ fprintf(stderr, "usage: %s [-b baseprefix] [repodir...]\n", argv0);
+ exit(1);
+}
+
+int
+main(int argc, char *argv[])
+{
+ FILE *fp;
+ char path[PATH_MAX], repodirabs[PATH_MAX + 1];
+ const char *repodir = NULL;
+ int i, r, ret = 0;
+
+ setlocale(LC_CTYPE, "");
+
+ /* do not search outside the git repository:
+ GIT_CONFIG_LEVEL_APP is the highest level currently */
+ git_libgit2_init();
+ for (i = 1; i <= GIT_CONFIG_LEVEL_APP; i++)
+ git_libgit2_opts(GIT_OPT_SET_SEARCH_PATH, i, "");
+ /* do not require the git repository to be owned by the current user */
+ git_libgit2_opts(GIT_OPT_SET_OWNER_VALIDATION, 0);
+
+#ifdef __OpenBSD__
+ if (pledge("stdio rpath", NULL) == -1)
+ err(1, "pledge");
+#endif
+
+ for (i = 1, r = 0; i < argc; i++) {
+ if (argv[i][0] == '-') {
+ if (argv[i][1] != 'b' || i + 1 >= argc)
+ usage(argv[0]);
+ relpath = argv[++i];
+ continue;
+ }
+
+ if (r++ == 0)
+ writeheader(stdout);
+
+ repodir = argv[i];
+ if (!realpath(repodir, repodirabs))
+ err(1, "realpath");
+
+ if (git_repository_open_ext(&repo, repodir,
+ GIT_REPOSITORY_OPEN_NO_SEARCH, NULL)) {
+ fprintf(stderr, "%s: cannot open repository\n", argv[0]);
+ ret = 1;
+ continue;
+ }
+
+ /* use directory name as name */
+ if ((name = strrchr(repodirabs, '/')))
+ name++;
+ else
+ name = "";
+
+ /* read description or .git/description */
+ joinpath(path, sizeof(path), repodir, "description");
+ if (!(fp = fopen(path, "r"))) {
+ joinpath(path, sizeof(path), repodir, ".git/description");
+ fp = fopen(path, "r");
+ }
+ description[0] = '\0';
+ if (fp) {
+ if (fgets(description, sizeof(description), fp))
+ description[strcspn(description, "\t\r\n")] = '\0';
+ else
+ description[0] = '\0';
+ checkfileerror(fp, "description", 'r');
+ fclose(fp);
+ }
+
+ writelog(stdout);
+ }
+ if (!repodir)
+ usage(argv[0]);
+
+ /* cleanup */
+ git_repository_free(repo);
+ git_libgit2_shutdown();
+
+ checkfileerror(stdout, "<stdout>", 'w');
+
+ return ret;
+}
(DIR) diff --git a/stagit-gemini.1 b/stagit-gemini.1
@@ -0,0 +1,119 @@
+.Dd August 2, 2021
+.Dt STAGIT-GOPHER 1
+.Os
+.Sh NAME
+.Nm stagit-gemini
+.Nd static git Gopher index generator
+.Sh SYNOPSIS
+.Nm
+.Op Fl b Ar baseprefix
+.Op Fl c Ar cachefile
+.Op Fl l Ar commits
+.Op Fl u Ar baseurl
+.Ar repodir
+.Sh DESCRIPTION
+.Nm
+writes Gopher indexes for the repository
+.Ar repodir
+to the current directory.
+.Pp
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl b Ar baseprefix
+Use base prefix as the root.
+By default this is "".
+.It Fl c Ar cachefile
+Cache the entries of the log index up to the point of
+the last commit.
+The
+.Ar cachefile
+will store the last commit id and the entries in the Gopher index.
+It is up to the user to make sure the state of the
+.Ar cachefile
+is in sync with the history of the repository.
+.It Fl l Ar commits
+Write a maximum number of
+.Ar commits
+to the log.gmi file only.
+However the commit files are written as usual.
+.It Fl u Ar baseurl
+Base URL to make links in the Atom feeds absolute.
+Does not use the prefix from the -b option.
+It should include the gemini type.
+For example: "gemini://codemadness.org/1/git/stagit-gemini/".
+.El
+.Pp
+The options
+.Fl c
+and
+.Fl l
+cannot be used at the same time.
+.Pp
+The following files will be written:
+.Bl -tag -width Ds
+.It atom.xml
+Atom XML feed of the last 100 commits.
+.It tags.xml
+Atom XML feed of the tags.
+.It files.gmi
+List of files in the latest tree, linking to the file.
+.It log.gmi
+List of commits in reverse chronological applied commit order, each commit
+links to a page with a diffstat and diff of the commit.
+.It refs.gmi
+Lists references of the repository such as branches and tags.
+.El
+.Pp
+For each entry in HEAD a file will be written in the format:
+file/filepath.gmi.
+This file will contain the textual data of the file prefixed by line numbers.
+The file will have the string "Binary file" if the data is considered to be
+non-textual.
+.Pp
+For each commit a file will be written in the format:
+commit/commitid.gmi.
+This file will contain the diffstat and diff of the commit.
+It will write the string "Binary files differ" if the data is considered to
+be non-textual.
+Too large diffs will be suppressed and a string
+"Diff is too large, output suppressed" will be written.
+.Pp
+When a Gopher commit file exists it won't be overwritten again, note that if
+you've changed
+.Nm
+or changed one of the metadata files of the repository it is recommended to
+recreate all the output files because it will contain old data.
+To do this remove the output directory and
+.Ar cachefile ,
+then recreate the files.
+.Pp
+The basename of the directory is used as the repository name.
+The suffix ".git" is removed from the basename, this suffix is commonly used
+for "bare" repos.
+.Pp
+The content of the follow files specifies the metadata for each repository:
+.Bl -tag -width Ds
+.It .git/description or description (bare repo).
+description
+.It .git/url or url (bare repo).
+primary clone URL of the repository, for example:
+git://git.codemadness.org/stagit
+.El
+.Pp
+When a README or LICENSE file exists in HEAD or a .gitmodules submodules file
+exists in HEAD a direct link in the index is made.
+.Sh EXIT STATUS
+.Ex -std
+.Sh EXAMPLES
+.Bd -literal
+mkdir -p gmiroot/gmirepo1 && cd gmiroot/gmirepo1
+stagit-gemini path/to/gitrepo1
+# repeat for other repositories.
+.Ed
+.Pp
+To update the gmi files when the repository is changed a git post-receive hook
+can be used, see the file example_post-receive.sh for an example.
+.Sh SEE ALSO
+.Xr stagit-gemini-index 1
+.Sh AUTHORS
+.An Hiltjo Posthuma Aq Mt hiltjo@codemadness.org
(DIR) diff --git a/stagit-gemini.c b/stagit-gemini.c
@@ -0,0 +1,1475 @@
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <err.h>
+#include <errno.h>
+#include <libgen.h>
+#include <limits.h>
+#include <locale.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <wchar.h>
+
+#include <git2.h>
+
+#include "compat.h"
+
+#define LEN(s) (sizeof(s)/sizeof(*s))
+#define PAD_TRUNCATE_SYMBOL "\xe2\x80\xa6" /* symbol: "ellipsis" */
+#define UTF_INVALID_SYMBOL "\xef\xbf\xbd" /* symbol: "replacement" */
+
+struct deltainfo {
+ git_patch *patch;
+
+ size_t addcount;
+ size_t delcount;
+};
+
+struct commitinfo {
+ const git_oid *id;
+
+ char oid[GIT_OID_HEXSZ + 1];
+ char parentoid[GIT_OID_HEXSZ + 1];
+
+ const git_signature *author;
+ const git_signature *committer;
+ const char *summary;
+ const char *msg;
+
+ git_diff *diff;
+ git_commit *commit;
+ git_commit *parent;
+ git_tree *commit_tree;
+ git_tree *parent_tree;
+
+ size_t addcount;
+ size_t delcount;
+ size_t filecount;
+
+ struct deltainfo **deltas;
+ size_t ndeltas;
+};
+
+/* reference and associated data for sorting */
+struct referenceinfo {
+ struct git_reference *ref;
+ struct commitinfo *ci;
+};
+
+static git_repository *repo;
+
+static const char *baseurl = ""; /* base URL to make absolute RSS/Atom URI */
+static const char *relpath = "";
+static const char *repodir;
+
+static char *name = "";
+static char *strippedname = "";
+static char description[255];
+static char cloneurl[1024];
+static char *submodules;
+static char *licensefiles[] = { "HEAD:LICENSE", "HEAD:LICENSE.md", "HEAD:COPYING" };
+static char *license;
+static char *readmefiles[] = { "HEAD:README", "HEAD:README.md" };
+static char *readme;
+static long long nlogcommits = -1; /* -1 indicates not used */
+
+/* cache */
+static git_oid lastoid;
+static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + NUL byte */
+static FILE *rcachefp, *wcachefp;
+static const char *cachefile;
+
+/* Handle read or write errors for a FILE * stream */
+void
+checkfileerror(FILE *fp, const char *name, int mode)
+{
+ if (mode == 'r' && ferror(fp))
+ errx(1, "read error: %s", name);
+ else if (mode == 'w' && (fflush(fp) || ferror(fp)))
+ errx(1, "write error: %s", name);
+}
+
+/* Format `len' columns of characters. If string is shorter pad the rest
+ * with characters `pad`. */
+int
+utf8pad(char *buf, size_t bufsiz, const char *s, size_t len, int pad)
+{
+ wchar_t wc;
+ size_t col = 0, i, slen, siz = 0;
+ int inc, rl, w;
+
+ if (!bufsiz)
+ return -1;
+ if (!len) {
+ buf[0] = '\0';
+ return 0;
+ }
+
+ slen = strlen(s);
+ for (i = 0; i < slen; i += inc) {
+ inc = 1; /* next byte */
+ if ((unsigned char)s[i] < 32)
+ continue;
+
+ rl = mbtowc(&wc, &s[i], slen - i < 4 ? slen - i : 4);
+ inc = rl;
+ if (rl < 0) {
+ mbtowc(NULL, NULL, 0); /* reset state */
+ inc = 1; /* invalid, seek next byte */
+ w = 1; /* replacement char is one width */
+ } else if ((w = wcwidth(wc)) == -1) {
+ continue;
+ }
+
+ if (col + w > len || (col + w == len && s[i + inc])) {
+ if (siz + 4 >= bufsiz)
+ return -1;
+ memcpy(&buf[siz], PAD_TRUNCATE_SYMBOL, sizeof(PAD_TRUNCATE_SYMBOL) - 1);
+ siz += sizeof(PAD_TRUNCATE_SYMBOL) - 1;
+ buf[siz] = '\0';
+ col++;
+ break;
+ } else if (rl < 0) {
+ if (siz + 4 >= bufsiz)
+ return -1;
+ memcpy(&buf[siz], UTF_INVALID_SYMBOL, sizeof(UTF_INVALID_SYMBOL) - 1);
+ siz += sizeof(UTF_INVALID_SYMBOL) - 1;
+ buf[siz] = '\0';
+ col++;
+ continue;
+ }
+ if (siz + inc + 1 >= bufsiz)
+ return -1;
+ memcpy(&buf[siz], &s[i], inc);
+ siz += inc;
+ buf[siz] = '\0';
+ col += w;
+ }
+
+ len -= col;
+ if (siz + len + 1 >= bufsiz)
+ return -1;
+ memset(&buf[siz], pad, len);
+ siz += len;
+ buf[siz] = '\0';
+
+ return 0;
+}
+
+void
+joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
+{
+ int r;
+
+ r = snprintf(buf, bufsiz, "%s%s%s",
+ path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
+ if (r < 0 || (size_t)r >= bufsiz)
+ errx(1, "path truncated: '%s%s%s'",
+ path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
+}
+
+void
+deltainfo_free(struct deltainfo *di)
+{
+ if (!di)
+ return;
+ git_patch_free(di->patch);
+ memset(di, 0, sizeof(*di));
+ free(di);
+}
+
+int
+commitinfo_getstats(struct commitinfo *ci)
+{
+ struct deltainfo *di;
+ git_diff_options opts;
+ git_diff_find_options fopts;
+ const git_diff_delta *delta;
+ const git_diff_hunk *hunk;
+ const git_diff_line *line;
+ git_patch *patch = NULL;
+ size_t ndeltas, nhunks, nhunklines;
+ size_t i, j, k;
+
+ if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
+ goto err;
+ if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
+ if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
+ ci->parent = NULL;
+ ci->parent_tree = NULL;
+ }
+ }
+
+ git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
+ opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH |
+ GIT_DIFF_IGNORE_SUBMODULES |
+ GIT_DIFF_INCLUDE_TYPECHANGE;
+ if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
+ goto err;
+
+ if (git_diff_find_init_options(&fopts, GIT_DIFF_FIND_OPTIONS_VERSION))
+ goto err;
+ /* find renames and copies, exact matches (no heuristic) for renames. */
+ fopts.flags |= GIT_DIFF_FIND_RENAMES | GIT_DIFF_FIND_COPIES |
+ GIT_DIFF_FIND_EXACT_MATCH_ONLY;
+ if (git_diff_find_similar(ci->diff, &fopts))
+ goto err;
+
+ ndeltas = git_diff_num_deltas(ci->diff);
+ if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
+ err(1, "calloc");
+
+ for (i = 0; i < ndeltas; i++) {
+ if (git_patch_from_diff(&patch, ci->diff, i))
+ goto err;
+
+ if (!(di = calloc(1, sizeof(struct deltainfo))))
+ err(1, "calloc");
+ di->patch = patch;
+ ci->deltas[i] = di;
+
+ delta = git_patch_get_delta(patch);
+
+ /* skip stats for binary data */
+ if (delta->flags & GIT_DIFF_FLAG_BINARY)
+ continue;
+
+ nhunks = git_patch_num_hunks(patch);
+ for (j = 0; j < nhunks; j++) {
+ if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
+ break;
+ for (k = 0; ; k++) {
+ if (git_patch_get_line_in_hunk(&line, patch, j, k))
+ break;
+ if (line->old_lineno == -1) {
+ di->addcount++;
+ ci->addcount++;
+ } else if (line->new_lineno == -1) {
+ di->delcount++;
+ ci->delcount++;
+ }
+ }
+ }
+ }
+ ci->ndeltas = i;
+ ci->filecount = i;
+
+ return 0;
+
+err:
+ git_diff_free(ci->diff);
+ ci->diff = NULL;
+ git_tree_free(ci->commit_tree);
+ ci->commit_tree = NULL;
+ git_tree_free(ci->parent_tree);
+ ci->parent_tree = NULL;
+ git_commit_free(ci->parent);
+ ci->parent = NULL;
+ if (ci->deltas)
+ for (i = 0; i < ci->ndeltas; i++)
+ deltainfo_free(ci->deltas[i]);
+ free(ci->deltas);
+ ci->deltas = NULL;
+ ci->ndeltas = 0;
+ ci->addcount = 0;
+ ci->delcount = 0;
+ ci->filecount = 0;
+
+ return -1;
+}
+
+void
+commitinfo_free(struct commitinfo *ci)
+{
+ size_t i;
+
+ if (!ci)
+ return;
+ if (ci->deltas)
+ for (i = 0; i < ci->ndeltas; i++)
+ deltainfo_free(ci->deltas[i]);
+ free(ci->deltas);
+ git_diff_free(ci->diff);
+ git_tree_free(ci->commit_tree);
+ git_tree_free(ci->parent_tree);
+ git_commit_free(ci->commit);
+ git_commit_free(ci->parent);
+ memset(ci, 0, sizeof(*ci));
+ free(ci);
+}
+
+struct commitinfo *
+commitinfo_getbyoid(const git_oid *id)
+{
+ struct commitinfo *ci;
+
+ if (!(ci = calloc(1, sizeof(struct commitinfo))))
+ err(1, "calloc");
+
+ if (git_commit_lookup(&(ci->commit), repo, id))
+ goto err;
+ ci->id = id;
+
+ git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
+ git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
+
+ ci->author = git_commit_author(ci->commit);
+ ci->committer = git_commit_committer(ci->commit);
+ ci->summary = git_commit_summary(ci->commit);
+ ci->msg = git_commit_message(ci->commit);
+
+ return ci;
+
+err:
+ commitinfo_free(ci);
+
+ return NULL;
+}
+
+int
+refs_cmp(const void *v1, const void *v2)
+{
+ const struct referenceinfo *r1 = v1, *r2 = v2;
+ time_t t1, t2;
+ int r;
+
+ if ((r = git_reference_is_tag(r1->ref) - git_reference_is_tag(r2->ref)))
+ return r;
+
+ t1 = r1->ci->author ? r1->ci->author->when.time : 0;
+ t2 = r2->ci->author ? r2->ci->author->when.time : 0;
+ if ((r = t1 > t2 ? -1 : (t1 == t2 ? 0 : 1)))
+ return r;
+
+ return strcmp(git_reference_shorthand(r1->ref),
+ git_reference_shorthand(r2->ref));
+}
+
+int
+getrefs(struct referenceinfo **pris, size_t *prefcount)
+{
+ struct referenceinfo *ris = NULL;
+ struct commitinfo *ci = NULL;
+ git_reference_iterator *it = NULL;
+ const git_oid *id = NULL;
+ git_object *obj = NULL;
+ git_reference *dref = NULL, *r, *ref = NULL;
+ size_t i, refcount;
+
+ *pris = NULL;
+ *prefcount = 0;
+
+ if (git_reference_iterator_new(&it, repo))
+ return -1;
+
+ for (refcount = 0; !git_reference_next(&ref, it); ) {
+ if (!git_reference_is_branch(ref) && !git_reference_is_tag(ref)) {
+ git_reference_free(ref);
+ ref = NULL;
+ continue;
+ }
+
+ switch (git_reference_type(ref)) {
+ case GIT_REF_SYMBOLIC:
+ if (git_reference_resolve(&dref, ref))
+ goto err;
+ r = dref;
+ break;
+ case GIT_REF_OID:
+ r = ref;
+ break;
+ default:
+ continue;
+ }
+ if (!git_reference_target(r) ||
+ git_reference_peel(&obj, r, GIT_OBJ_ANY))
+ goto err;
+ if (!(id = git_object_id(obj)))
+ goto err;
+ if (!(ci = commitinfo_getbyoid(id)))
+ break;
+
+ if (!(ris = reallocarray(ris, refcount + 1, sizeof(*ris))))
+ err(1, "realloc");
+ ris[refcount].ci = ci;
+ ris[refcount].ref = r;
+ refcount++;
+
+ git_object_free(obj);
+ obj = NULL;
+ git_reference_free(dref);
+ dref = NULL;
+ }
+ git_reference_iterator_free(it);
+
+ /* sort by type, date then shorthand name */
+ qsort(ris, refcount, sizeof(*ris), refs_cmp);
+
+ *pris = ris;
+ *prefcount = refcount;
+
+ return 0;
+
+err:
+ git_object_free(obj);
+ git_reference_free(dref);
+ commitinfo_free(ci);
+ for (i = 0; i < refcount; i++) {
+ commitinfo_free(ris[i].ci);
+ git_reference_free(ris[i].ref);
+ }
+ free(ris);
+
+ return -1;
+}
+
+FILE *
+efopen(const char *filename, const char *flags)
+{
+ FILE *fp;
+
+ if (!(fp = fopen(filename, flags)))
+ err(1, "fopen: '%s'", filename);
+
+ return fp;
+}
+
+/* Escape characters below as HTML 2.0 / XML 1.0. */
+void
+xmlencode(FILE *fp, const char *s, size_t len)
+{
+ size_t i;
+
+ for (i = 0; *s && i < len; s++, i++) {
+ switch(*s) {
+ case '<': fputs("<", fp); break;
+ case '>': fputs(">", fp); break;
+ case '\'': fputs("'", fp); break;
+ case '&': fputs("&", fp); break;
+ case '"': fputs(""", fp); break;
+ default: putc(*s, fp);
+ }
+ }
+}
+
+/* Escape characters in text in geomyidae .gmi format, with newlines */
+void
+gmitextnl(FILE *fp, const char *s, size_t len)
+{
+ size_t i, n = 0;
+
+ for (i = 0; s[i] && i < len; i++) {
+ switch (s[i]) {
+ case '\r': break;
+ default: fputc(s[i], fp);
+ }
+ n = (s[i] != '\n');
+ }
+}
+
+/* Escape characters in text in geomyidae .gmi format,
+ newlines are ignored */
+void
+gmitext(FILE *fp, const char *s, size_t len)
+{
+ size_t i;
+
+ for (i = 0; *s && i < len; s++, i++) {
+ switch (*s) {
+ case '\r': /* ignore CR */
+ case '\n': /* ignore LF */
+ break;
+ default:
+ putc(*s, fp);
+ break;
+ }
+ }
+}
+
+/* Escape characters in links in geomyidae .gmi format */
+void
+gmilink(FILE *fp, const char *s, size_t len)
+{
+ size_t i;
+
+ for (i = 0; *s && i < len; s++, i++) {
+ switch (*s) {
+ case '\r': /* ignore CR */
+ case '\n': /* ignore LF */
+ break;
+ default:
+ putc(*s, fp);
+ break;
+ }
+ }
+}
+
+int
+mkdirp(const char *path)
+{
+ char tmp[PATH_MAX], *p;
+
+ if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
+ errx(1, "path truncated: '%s'", path);
+ for (p = tmp + (tmp[0] == '/'); *p; p++) {
+ if (*p != '/')
+ continue;
+ *p = '\0';
+ if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
+ return -1;
+ *p = '/';
+ }
+ if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
+ return -1;
+ return 0;
+}
+
+void
+printtimez(FILE *fp, const git_time *intime)
+{
+ struct tm *intm;
+ time_t t;
+ char out[32];
+
+ t = (time_t)intime->time;
+ if (!(intm = gmtime(&t)))
+ return;
+ strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
+ fputs(out, fp);
+}
+
+void
+printtime(FILE *fp, const git_time *intime)
+{
+ struct tm *intm;
+ time_t t;
+ char out[32];
+
+ t = (time_t)intime->time + (intime->offset * 60);
+ if (!(intm = gmtime(&t)))
+ return;
+ strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
+ if (intime->offset < 0)
+ fprintf(fp, "%s -%02d%02d", out,
+ -(intime->offset) / 60, -(intime->offset) % 60);
+ else
+ fprintf(fp, "%s +%02d%02d", out,
+ intime->offset / 60, intime->offset % 60);
+}
+
+void
+printtimeshort(FILE *fp, const git_time *intime)
+{
+ struct tm *intm;
+ time_t t;
+ char out[32];
+
+ t = (time_t)intime->time;
+ if (!(intm = gmtime(&t)))
+ return;
+ strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
+ fputs(out, fp);
+}
+
+void
+writeheader(FILE *fp, const char *title)
+{
+ gmitext(fp, title, strlen(title));
+ if (title[0] && strippedname[0])
+ fputs(" - ", fp);
+ gmitext(fp, strippedname, strlen(strippedname));
+ if (description[0])
+ fputs(" - ", fp);
+ gmitext(fp, description, strlen(description));
+ fputs("\n", fp);
+ if (cloneurl[0]) {
+ fputs("=> ", fp);
+ gmilink(fp, cloneurl, strlen(cloneurl));
+ fputs(" git clone: ", fp);
+ gmilink(fp, cloneurl, strlen(cloneurl));
+ fputc('\n', fp);
+ }
+ fprintf(fp, "=> %s/log.gmi Log\n", relpath);
+ fprintf(fp, "=> %s/files.gmi Files\n", relpath);
+ fprintf(fp, "=> %s/refs.gmi Refs\n", relpath);
+ if (submodules)
+ fprintf(fp, "=> %s/file/%s.gmi Submodules\n",
+ relpath, submodules);
+ if (readme)
+ fprintf(fp, "=> %s/file/%s.gmi README\n",
+ relpath, readme);
+ if (license)
+ fprintf(fp, "=> %s/file/%s.gmi LICENSE\n",
+ relpath, license);
+ fputs("---\n", fp);
+}
+
+void
+writefooter(FILE *fp)
+{
+ fputs("\n\ngenerated w/ stagit-gemini\n\n", fp);
+}
+
+size_t
+writeblobgmi(FILE *fp, const git_blob *blob)
+{
+ size_t n = 0, i, j, len, prev;
+ const char *nfmt = "%6zu ";
+ const char *s = git_blob_rawcontent(blob);
+
+ len = git_blob_rawsize(blob);
+ if (len > 0) {
+ for (i = 0, prev = 0; i < len; i++) {
+ if (s[i] != '\n')
+ continue;
+ n++;
+ fprintf(fp, nfmt, n, n, n);
+ for (j = prev; j <= i && s[j]; j++) {
+ switch (s[j]) {
+ case '\r': break;
+ default: putc(s[j], fp);
+ }
+ }
+ prev = i + 1;
+ }
+ /* trailing data */
+ if ((len - prev) > 0) {
+ n++;
+ fprintf(fp, nfmt, n, n, n);
+ for (j = prev; j < len - prev && s[j]; j++) {
+ switch (s[j]) {
+ case '\r': break;
+ case '\t': fputs(" ", fp); break;
+ default: putc(s[j], fp);
+ }
+ }
+ }
+ }
+
+ return n;
+}
+
+void
+printcommit(FILE *fp, struct commitinfo *ci)
+{
+ fprintf(fp, "=> %s/commit/%s.gmi commit %s\n",
+ relpath, ci->oid, ci->oid);
+
+ if (ci->parentoid[0])
+ fprintf(fp, "=> %s/commit/%s.gmi parent %s\n",
+ relpath, ci->parentoid, ci->parentoid);
+
+ if (ci->author) {
+ fputs(" Author: ", fp);
+ gmilink(fp, ci->author->name, strlen(ci->author->name));
+ fputs(" <", fp);
+ gmilink(fp, ci->author->email, strlen(ci->author->email));
+ fputs(">\n", fp);
+ fputs("Date: ", fp);
+ printtime(fp, &(ci->author->when));
+ putc('\n', fp);
+ }
+ if (ci->msg) {
+ putc('\n', fp);
+ gmitextnl(fp, ci->msg, strlen(ci->msg));
+ putc('\n', fp);
+ }
+}
+
+void
+printshowfile(FILE *fp, struct commitinfo *ci)
+{
+ const git_diff_delta *delta;
+ const git_diff_hunk *hunk;
+ const git_diff_line *line;
+ git_patch *patch;
+ size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
+ char buf[256], filename[256], linestr[32];
+ int c;
+
+ printcommit(fp, ci);
+
+ if (!ci->deltas)
+ return;
+
+ if (ci->filecount > 1000 ||
+ ci->ndeltas > 1000 ||
+ ci->addcount > 100000 ||
+ ci->delcount > 100000) {
+ fputs("\nDiff is too large, output suppressed.\n", fp);
+ return;
+ }
+
+ /* diff stat */
+ fputs("Diffstat:\n", fp);
+ for (i = 0; i < ci->ndeltas; i++) {
+ delta = git_patch_get_delta(ci->deltas[i]->patch);
+
+ switch (delta->status) {
+ case GIT_DELTA_ADDED: c = 'A'; break;
+ case GIT_DELTA_COPIED: c = 'C'; break;
+ case GIT_DELTA_DELETED: c = 'D'; break;
+ case GIT_DELTA_MODIFIED: c = 'M'; break;
+ case GIT_DELTA_RENAMED: c = 'R'; break;
+ case GIT_DELTA_TYPECHANGE: c = 'T'; break;
+ default: c = ' '; break;
+ }
+
+ if (strcmp(delta->old_file.path, delta->new_file.path)) {
+ snprintf(filename, sizeof(filename), "%s -> %s",
+ delta->old_file.path, delta->new_file.path);
+ utf8pad(buf, sizeof(buf), filename, 35, ' ');
+ } else {
+ utf8pad(buf, sizeof(buf), delta->old_file.path, 35, ' ');
+ }
+ fprintf(fp, " %c ", c);
+ gmitext(fp, buf, strlen(buf));
+
+ add = ci->deltas[i]->addcount;
+ del = ci->deltas[i]->delcount;
+ changed = add + del;
+ total = sizeof(linestr) - 2;
+ if (changed > total) {
+ if (add)
+ add = ((float)total / changed * add) + 1;
+ if (del)
+ del = ((float)total / changed * del) + 1;
+ }
+ memset(&linestr, '+', add);
+ memset(&linestr[add], '-', del);
+
+ fprintf(fp, " | %7zu ",
+ ci->deltas[i]->addcount + ci->deltas[i]->delcount);
+ fwrite(&linestr, 1, add, fp);
+ fwrite(&linestr[add], 1, del, fp);
+ fputs("\n", fp);
+ }
+ fprintf(fp, "\n%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
+ ci->filecount, ci->filecount == 1 ? "" : "s",
+ ci->addcount, ci->addcount == 1 ? "" : "s",
+ ci->delcount, ci->delcount == 1 ? "" : "s");
+
+ fputs("---\n", fp);
+
+ for (i = 0; i < ci->ndeltas; i++) {
+ patch = ci->deltas[i]->patch;
+ delta = git_patch_get_delta(patch);
+ /* NOTE: only links to new path */
+ fprintf(fp, "=> %s/file/", relpath);
+ gmilink(fp, delta->new_file.path, strlen(delta->new_file.path));
+ fputs(".gmi diff --git a/", fp);
+ gmilink(fp, delta->old_file.path, strlen(delta->old_file.path));
+ fputs(" b/", fp);
+ gmilink(fp, delta->new_file.path, strlen(delta->new_file.path));
+ fputc('\n', fp);
+
+ /* check binary data */
+ if (delta->flags & GIT_DIFF_FLAG_BINARY) {
+ fputs("Binary files differ.\n", fp);
+ continue;
+ }
+
+ nhunks = git_patch_num_hunks(patch);
+ for (j = 0; j < nhunks; j++) {
+ if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
+ break;
+
+ if (hunk->header_len > 0 && hunk->header[0] == '[')
+ fputc('t', fp);
+ gmitext(fp, hunk->header, hunk->header_len);
+ putc('\n', fp);
+
+ for (k = 0; ; k++) {
+ if (git_patch_get_line_in_hunk(&line, patch, j, k))
+ break;
+ if (line->old_lineno == -1)
+ fputs("+", fp);
+ else if (line->new_lineno == -1)
+ fputs("-", fp);
+ else
+ fputs(" ", fp);
+ gmitext(fp, line->content, line->content_len);
+ putc('\n', fp);
+ }
+ }
+ }
+}
+
+void
+writelogline(FILE *fp, struct commitinfo *ci)
+{
+ char buf[256];
+
+ fprintf(fp, "=> %s/commit/%s.gmi ", relpath, ci->oid);
+ if (ci->author)
+ printtimeshort(fp, &(ci->author->when));
+ else
+ fputs(" ", fp);
+ fputs(" ", fp);
+ utf8pad(buf, sizeof(buf), ci->summary ? ci->summary : "", 40, ' ');
+ gmilink(fp, buf, strlen(buf));
+ fputs(" ", fp);
+ utf8pad(buf, sizeof(buf), ci->author ? ci->author->name : "", 19, '\0');
+ gmilink(fp, buf, strlen(buf));
+ fputc('\n', fp);
+}
+
+int
+writelog(FILE *fp, const git_oid *oid)
+{
+ struct commitinfo *ci;
+ git_revwalk *w = NULL;
+ git_oid id;
+ char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
+ FILE *fpfile;
+ size_t remcommits = 0;
+ int r;
+
+ git_revwalk_new(&w, repo);
+ git_revwalk_push(w, oid);
+
+ while (!git_revwalk_next(&id, w)) {
+ if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
+ break;
+
+ git_oid_tostr(oidstr, sizeof(oidstr), &id);
+ r = snprintf(path, sizeof(path), "commit/%s.gmi", oidstr);
+ if (r < 0 || (size_t)r >= sizeof(path))
+ errx(1, "path truncated: 'commit/%s.gmi'", oidstr);
+ r = access(path, F_OK);
+
+ /* optimization: if there are no log lines to write and
+ the commit file already exists: skip the diffstat */
+ if (!nlogcommits) {
+ remcommits++;
+ if (!r)
+ continue;
+ }
+
+ if (!(ci = commitinfo_getbyoid(&id)))
+ break;
+
+ if (nlogcommits != 0) {
+ writelogline(fp, ci);
+ if (nlogcommits > 0)
+ nlogcommits--;
+ }
+
+ if (cachefile)
+ writelogline(wcachefp, ci);
+
+ /* check if file exists if so skip it */
+ if (r) {
+ /* lookup stats: only required here for gemini */
+ if (commitinfo_getstats(ci) == -1)
+ goto err;
+
+ fpfile = efopen(path, "w");
+ writeheader(fpfile, ci->summary);
+ printshowfile(fpfile, ci);
+ writefooter(fpfile);
+ checkfileerror(fpfile, path, 'w');
+ fclose(fpfile);
+ }
+err:
+ commitinfo_free(ci);
+ }
+ git_revwalk_free(w);
+
+ if (nlogcommits == 0 && remcommits != 0) {
+ fprintf(fp, "%16.16s "
+ "%zu more commits remaining, fetch the repository\n",
+ "", remcommits);
+ }
+
+ return 0;
+}
+
+void
+printcommitatom(FILE *fp, struct commitinfo *ci, const char *tag)
+{
+ fputs("<entry>\n", fp);
+
+ fprintf(fp, "<id>%s</id>\n", ci->oid);
+ if (ci->author) {
+ fputs("<published>", fp);
+ printtimez(fp, &(ci->author->when));
+ fputs("</published>\n", fp);
+ }
+ if (ci->committer) {
+ fputs("<updated>", fp);
+ printtimez(fp, &(ci->committer->when));
+ fputs("</updated>\n", fp);
+ }
+ if (ci->summary) {
+ fputs("<title type=\"text\">", fp);
+ if (tag && tag[0]) {
+ fputs("[", fp);
+ xmlencode(fp, tag, strlen(tag));
+ fputs("] ", fp);
+ }
+ xmlencode(fp, ci->summary, strlen(ci->summary));
+ fputs("</title>\n", fp);
+ }
+ fprintf(fp, "<link rel=\"alternate\" href=\"%scommit/%s.gmi\" />\n",
+ baseurl, ci->oid);
+
+ if (ci->author) {
+ fputs("<author>\n<name>", fp);
+ xmlencode(fp, ci->author->name, strlen(ci->author->name));
+ fputs("</name>\n<email>", fp);
+ xmlencode(fp, ci->author->email, strlen(ci->author->email));
+ fputs("</email>\n</author>\n", fp);
+ }
+
+ fputs("<content type=\"text\">", fp);
+ fprintf(fp, "commit %s\n", ci->oid);
+ if (ci->parentoid[0])
+ fprintf(fp, "parent %s\n", ci->parentoid);
+ if (ci->author) {
+ fputs("Author: ", fp);
+ xmlencode(fp, ci->author->name, strlen(ci->author->name));
+ fputs(" <", fp);
+ xmlencode(fp, ci->author->email, strlen(ci->author->email));
+ fputs(">\nDate: ", fp);
+ printtime(fp, &(ci->author->when));
+ putc('\n', fp);
+ }
+ if (ci->msg) {
+ putc('\n', fp);
+ xmlencode(fp, ci->msg, strlen(ci->msg));
+ }
+ fputs("\n</content>\n</entry>\n", fp);
+}
+
+int
+writeatom(FILE *fp, int all)
+{
+ struct referenceinfo *ris = NULL;
+ size_t refcount = 0;
+ struct commitinfo *ci;
+ git_revwalk *w = NULL;
+ git_oid id;
+ size_t i, m = 100; /* last 'm' commits */
+
+ fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
+ "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
+ xmlencode(fp, strippedname, strlen(strippedname));
+ fputs(", branch HEAD</title>\n<subtitle>", fp);
+ xmlencode(fp, description, strlen(description));
+ fputs("</subtitle>\n", fp);
+
+ /* all commits or only tags? */
+ if (all) {
+ git_revwalk_new(&w, repo);
+ git_revwalk_push_head(w);
+ for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
+ if (!(ci = commitinfo_getbyoid(&id)))
+ break;
+ printcommitatom(fp, ci, "");
+ commitinfo_free(ci);
+ }
+ git_revwalk_free(w);
+ } else if (getrefs(&ris, &refcount) != -1) {
+ /* references: tags */
+ for (i = 0; i < refcount; i++) {
+ if (git_reference_is_tag(ris[i].ref))
+ printcommitatom(fp, ris[i].ci,
+ git_reference_shorthand(ris[i].ref));
+
+ commitinfo_free(ris[i].ci);
+ git_reference_free(ris[i].ref);
+ }
+ free(ris);
+ }
+
+ fputs("</feed>\n", fp);
+
+ return 0;
+}
+
+size_t
+writeblob(git_object *obj, const char *fpath, const char *filename, size_t filesize)
+{
+ char tmp[PATH_MAX] = "", *d;
+ size_t lc = 0;
+ FILE *fp;
+
+ if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
+ errx(1, "path truncated: '%s'", fpath);
+ if (!(d = dirname(tmp)))
+ err(1, "dirname");
+ if (mkdirp(d))
+ return -1;
+
+ fp = efopen(fpath, "w");
+ writeheader(fp, filename);
+ if (filename[0] == '[')
+ fputs("[|", fp);
+ gmitext(fp, filename, strlen(filename));
+ fprintf(fp, " (%zuB)\n", filesize);
+ fputs("---\n", fp);
+
+ if (git_blob_is_binary((git_blob *)obj))
+ fputs("Binary file.\n", fp);
+ else
+ lc = writeblobgmi(fp, (git_blob *)obj);
+
+ writefooter(fp);
+ checkfileerror(fp, fpath, 'w');
+ fclose(fp);
+
+ return lc;
+}
+
+const char *
+filemode(git_filemode_t m)
+{
+ static char mode[11];
+
+ memset(mode, '-', sizeof(mode) - 1);
+ mode[10] = '\0';
+
+ if (S_ISREG(m))
+ mode[0] = '-';
+ else if (S_ISBLK(m))
+ mode[0] = 'b';
+ else if (S_ISCHR(m))
+ mode[0] = 'c';
+ else if (S_ISDIR(m))
+ mode[0] = 'd';
+ else if (S_ISFIFO(m))
+ mode[0] = 'p';
+ else if (S_ISLNK(m))
+ mode[0] = 'l';
+ else if (S_ISSOCK(m))
+ mode[0] = 's';
+ else
+ mode[0] = '?';
+
+ if (m & S_IRUSR) mode[1] = 'r';
+ if (m & S_IWUSR) mode[2] = 'w';
+ if (m & S_IXUSR) mode[3] = 'x';
+ if (m & S_IRGRP) mode[4] = 'r';
+ if (m & S_IWGRP) mode[5] = 'w';
+ if (m & S_IXGRP) mode[6] = 'x';
+ if (m & S_IROTH) mode[7] = 'r';
+ if (m & S_IWOTH) mode[8] = 'w';
+ if (m & S_IXOTH) mode[9] = 'x';
+
+ if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
+ if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
+ if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
+
+ return mode;
+}
+
+int
+writefilestree(FILE *fp, git_tree *tree, const char *path)
+{
+ const git_tree_entry *entry = NULL;
+ git_object *obj = NULL;
+ const char *entryname;
+ char buf[256], filepath[PATH_MAX], entrypath[PATH_MAX], oid[8];
+ size_t count, i, lc, filesize;
+ int r, ret;
+
+ count = git_tree_entrycount(tree);
+ for (i = 0; i < count; i++) {
+ if (!(entry = git_tree_entry_byindex(tree, i)) ||
+ !(entryname = git_tree_entry_name(entry)))
+ return -1;
+ joinpath(entrypath, sizeof(entrypath), path, entryname);
+
+ r = snprintf(filepath, sizeof(filepath), "file/%s.gmi",
+ entrypath);
+ if (r < 0 || (size_t)r >= sizeof(filepath))
+ errx(1, "path truncated: 'file/%s.gmi'", entrypath);
+
+ if (!git_tree_entry_to_object(&obj, repo, entry)) {
+ switch (git_object_type(obj)) {
+ case GIT_OBJ_BLOB:
+ break;
+ case GIT_OBJ_TREE:
+ /* NOTE: recurses */
+ ret = writefilestree(fp, (git_tree *)obj,
+ entrypath);
+ git_object_free(obj);
+ if (ret)
+ return ret;
+ continue;
+ default:
+ git_object_free(obj);
+ continue;
+ }
+
+ filesize = git_blob_rawsize((git_blob *)obj);
+ lc = writeblob(obj, filepath, entryname, filesize);
+
+ fprintf(fp, "=> %s/", relpath);
+ gmilink(fp, filepath, strlen(filepath));
+ fputc(' ', fp);
+ fputs(filemode(git_tree_entry_filemode(entry)), fp);
+ fputs(" ", fp);
+ utf8pad(buf, sizeof(buf), entrypath, 50, ' ');
+ gmilink(fp, buf, strlen(buf));
+ fputs(" ", fp);
+ if (lc > 0)
+ fprintf(fp, "%7zuL", lc);
+ else
+ fprintf(fp, "%7zuB", filesize);
+ fputc('\n', fp);
+ git_object_free(obj);
+ } else if (git_tree_entry_type(entry) == GIT_OBJ_COMMIT) {
+ /* commit object in tree is a submodule */
+ git_oid_tostr(oid, sizeof(oid), git_tree_entry_id(entry));
+ gmilink(fp, oid, strlen(oid));
+ fprintf(fp, "=> %s/file/.gitmodules.gmi ", relpath);
+ fputs("m--------- ", fp);
+
+ fputc('\n', fp);
+
+
+ /* NOTE: linecount omitted */
+ }
+ }
+
+ return 0;
+}
+
+int
+writefiles(FILE *fp, const git_oid *id)
+{
+ git_tree *tree = NULL;
+ git_commit *commit = NULL;
+ int ret = -1;
+
+ fprintf(fp, "%-10.10s ", "Mode");
+ fprintf(fp, "%-50.50s ", "Name");
+ fprintf(fp, "%8.8s\n", "Size");
+
+ if (!git_commit_lookup(&commit, repo, id) &&
+ !git_commit_tree(&tree, commit))
+ ret = writefilestree(fp, tree, "");
+
+ git_commit_free(commit);
+ git_tree_free(tree);
+
+ return ret;
+}
+
+int
+writerefs(FILE *fp)
+{
+ struct referenceinfo *ris = NULL;
+ struct commitinfo *ci;
+ size_t count, i, j, refcount;
+ const char *titles[] = { "Branches", "Tags" };
+ const char *s;
+ char buf[256];
+
+ if (getrefs(&ris, &refcount) == -1)
+ return -1;
+
+ for (i = 0, j = 0, count = 0; i < refcount; i++) {
+ if (j == 0 && git_reference_is_tag(ris[i].ref)) {
+ /* table footer */
+ if (count)
+ fputs("\n", fp);
+ count = 0;
+ j = 1;
+ }
+
+ /* print header if it has an entry (first). */
+ if (++count == 1) {
+ fprintf(fp, "%s\n", titles[j]);
+ fprintf(fp, " %-32.32s", "Name");
+ fprintf(fp, " %-16.16s", "Last commit date");
+ fprintf(fp, " %s\n", "Author");
+ }
+
+ ci = ris[i].ci;
+ s = git_reference_shorthand(ris[i].ref);
+
+ fputs(" ", fp);
+ utf8pad(buf, sizeof(buf), s, 32, ' ');
+ gmilink(fp, buf, strlen(buf));
+ fputs(" ", fp);
+ if (ci->author)
+ printtimeshort(fp, &(ci->author->when));
+ else
+ fputs(" ", fp);
+ fputs(" ", fp);
+ if (ci->author) {
+ utf8pad(buf, sizeof(buf), ci->author->name, 25, '\0');
+ gmilink(fp, buf, strlen(buf));
+ }
+ fputs("\n", fp);
+ }
+ /* table footer */
+ if (count)
+ fputs("\n", fp);
+
+ for (i = 0; i < refcount; i++) {
+ commitinfo_free(ris[i].ci);
+ git_reference_free(ris[i].ref);
+ }
+ free(ris);
+
+ return 0;
+}
+
+void
+usage(char *argv0)
+{
+ fprintf(stderr, "usage: %s [-b baseprefix] [-c cachefile | -l commits] "
+ "[-u baseurl] repodir\n", argv0);
+ exit(1);
+}
+
+int
+main(int argc, char *argv[])
+{
+ git_object *obj = NULL;
+ const git_oid *head = NULL;
+ mode_t mask;
+ FILE *fp, *fpread;
+ char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
+ char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
+ size_t n;
+ int i, fd;
+
+ setlocale(LC_CTYPE, "");
+
+ for (i = 1; i < argc; i++) {
+ if (argv[i][0] != '-') {
+ if (repodir)
+ usage(argv[0]);
+ repodir = argv[i];
+ } else if (argv[i][1] == 'b') {
+ if (i + 1 >= argc)
+ usage(argv[0]);
+ relpath = argv[++i];
+ } else if (argv[i][1] == 'c') {
+ if (nlogcommits > 0 || i + 1 >= argc)
+ usage(argv[0]);
+ cachefile = argv[++i];
+ } else if (argv[i][1] == 'l') {
+ if (cachefile || i + 1 >= argc)
+ usage(argv[0]);
+ errno = 0;
+ nlogcommits = strtoll(argv[++i], &p, 10);
+ if (argv[i][0] == '\0' || *p != '\0' ||
+ nlogcommits <= 0 || errno)
+ usage(argv[0]);
+ } else if (argv[i][1] == 'u') {
+ if (i + 1 >= argc)
+ usage(argv[0]);
+ baseurl = argv[++i];
+ }
+ }
+ if (!repodir)
+ usage(argv[0]);
+
+ if (!realpath(repodir, repodirabs))
+ err(1, "realpath");
+
+ /* do not search outside the git repository:
+ GIT_CONFIG_LEVEL_APP is the highest level currently */
+ git_libgit2_init();
+ for (i = 1; i <= GIT_CONFIG_LEVEL_APP; i++)
+ git_libgit2_opts(GIT_OPT_SET_SEARCH_PATH, i, "");
+ /* do not require the git repository to be owned by the current user */
+ git_libgit2_opts(GIT_OPT_SET_OWNER_VALIDATION, 0);
+
+#ifdef __OpenBSD__
+ if (unveil(repodir, "r") == -1)
+ err(1, "unveil: %s", repodir);
+ if (unveil(".", "rwc") == -1)
+ err(1, "unveil: .");
+ if (cachefile && unveil(cachefile, "rwc") == -1)
+ err(1, "unveil: %s", cachefile);
+
+ if (cachefile) {
+ if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
+ err(1, "pledge");
+ } else {
+ if (pledge("stdio rpath wpath cpath", NULL) == -1)
+ err(1, "pledge");
+ }
+#endif
+
+ if (git_repository_open_ext(&repo, repodir,
+ GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
+ fprintf(stderr, "%s: cannot open repository\n", argv[0]);
+ return 1;
+ }
+
+ /* find HEAD */
+ if (!git_revparse_single(&obj, repo, "HEAD"))
+ head = git_object_id(obj);
+ git_object_free(obj);
+
+ /* use directory name as name */
+ if ((name = strrchr(repodirabs, '/')))
+ name++;
+ else
+ name = "";
+
+ /* strip .git suffix */
+ if (!(strippedname = strdup(name)))
+ err(1, "strdup");
+ if ((p = strrchr(strippedname, '.')))
+ if (!strcmp(p, ".git"))
+ *p = '\0';
+
+ /* read description or .git/description */
+ joinpath(path, sizeof(path), repodir, "description");
+ if (!(fpread = fopen(path, "r"))) {
+ joinpath(path, sizeof(path), repodir, ".git/description");
+ fpread = fopen(path, "r");
+ }
+ if (fpread) {
+ if (!fgets(description, sizeof(description), fpread))
+ description[0] = '\0';
+ checkfileerror(fpread, path, 'r');
+ fclose(fpread);
+ }
+
+ /* read url or .git/url */
+ joinpath(path, sizeof(path), repodir, "url");
+ if (!(fpread = fopen(path, "r"))) {
+ joinpath(path, sizeof(path), repodir, ".git/url");
+ fpread = fopen(path, "r");
+ }
+ if (fpread) {
+ if (!fgets(cloneurl, sizeof(cloneurl), fpread))
+ cloneurl[0] = '\0';
+ checkfileerror(fpread, path, 'r');
+ fclose(fpread);
+ cloneurl[strcspn(cloneurl, "\n")] = '\0';
+ }
+
+ /* check LICENSE */
+ for (i = 0; i < LEN(licensefiles) && !license; i++) {
+ if (!git_revparse_single(&obj, repo, licensefiles[i]) &&
+ git_object_type(obj) == GIT_OBJ_BLOB)
+ license = licensefiles[i] + strlen("HEAD:");
+ git_object_free(obj);
+ }
+
+ /* check README */
+ for (i = 0; i < LEN(readmefiles) && !readme; i++) {
+ if (!git_revparse_single(&obj, repo, readmefiles[i]) &&
+ git_object_type(obj) == GIT_OBJ_BLOB)
+ readme = readmefiles[i] + strlen("HEAD:");
+ git_object_free(obj);
+ }
+
+ if (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
+ git_object_type(obj) == GIT_OBJ_BLOB)
+ submodules = ".gitmodules";
+ git_object_free(obj);
+
+ /* log for HEAD */
+ fp = efopen("log.gmi", "w");
+ mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
+ writeheader(fp, "Log");
+
+ fprintf(fp, "%-16.16s ", "Date");
+ fprintf(fp, "%-40.40s ", "Commit message");
+ fprintf(fp, "%s\n", "Author");
+
+ if (cachefile && head) {
+ /* read from cache file (does not need to exist) */
+ if ((rcachefp = fopen(cachefile, "r"))) {
+ if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
+ errx(1, "%s: no object id", cachefile);
+ if (git_oid_fromstr(&lastoid, lastoidstr))
+ errx(1, "%s: invalid object id", cachefile);
+ }
+
+ /* write log to (temporary) cache */
+ if ((fd = mkstemp(tmppath)) == -1)
+ err(1, "mkstemp");
+ if (!(wcachefp = fdopen(fd, "w")))
+ err(1, "fdopen: '%s'", tmppath);
+ /* write last commit id (HEAD) */
+ git_oid_tostr(buf, sizeof(buf), head);
+ fprintf(wcachefp, "%s\n", buf);
+
+ writelog(fp, head);
+
+ if (rcachefp) {
+ /* append previous log to log.gmi and the new cache */
+ while (!feof(rcachefp)) {
+ n = fread(buf, 1, sizeof(buf), rcachefp);
+ if (ferror(rcachefp))
+ break;
+ if (fwrite(buf, 1, n, fp) != n ||
+ fwrite(buf, 1, n, wcachefp) != n)
+ break;
+ }
+ checkfileerror(rcachefp, cachefile, 'r');
+ fclose(rcachefp);
+ }
+ checkfileerror(wcachefp, tmppath, 'w');
+ fclose(wcachefp);
+ } else {
+ if (head)
+ writelog(fp, head);
+ }
+ fprintf(fp, "\n=> %s/atom.xml Atom Feed\n", relpath);
+ writefooter(fp);
+ checkfileerror(fp, "log.gmi", 'w');
+ fclose(fp);
+
+ /* files for HEAD */
+ fp = efopen("files.gmi", "w");
+ writeheader(fp, "Files");
+ if (head)
+ writefiles(fp, head);
+ writefooter(fp);
+ checkfileerror(fp, "files.gmi", 'w');
+ fclose(fp);
+
+ /* summary page with branches and tags */
+ fp = efopen("refs.gmi", "w");
+ writeheader(fp, "Refs");
+ writerefs(fp);
+ writefooter(fp);
+ checkfileerror(fp, "refs.gmi", 'w');
+ fclose(fp);
+
+ /* Atom feed */
+ fp = efopen("atom.xml", "w");
+ writeatom(fp, 1);
+ checkfileerror(fp, "atom.xml", 'w');
+ fclose(fp);
+
+ /* Atom feed for tags / releases */
+ fp = efopen("tags.xml", "w");
+ writeatom(fp, 0);
+ checkfileerror(fp, "tags.xml", 'w');
+ fclose(fp);
+
+ /* rename new cache file on success */
+ if (cachefile && head) {
+ if (rename(tmppath, cachefile))
+ err(1, "rename: '%s' to '%s'", tmppath, cachefile);
+ umask((mask = umask(0)));
+ if (chmod(cachefile,
+ (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
+ err(1, "chmod: '%s'", cachefile);
+ }
+
+ /* cleanup */
+ git_repository_free(repo);
+ git_libgit2_shutdown();
+
+ return 0;
+}