Message-ID: <42024D16.3050303@arbash-meinel.com>
Date: Thu, 03 Feb 2005 10:11:02 -0600
From: John Arbash Meinel <john@arbash-meinel.com>
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To: Gnu Arch Users <gnu-arch-users@gnu.org>
Subject: Re: [Gnu-arch-users] mirroring concepts/practice help
References: <5a7d482af20133a0b03c35bd22319f92@desertsol.com>	<420132B1.9040000@panoramicfeedback.com>	<1c92b5e634b0fe98c1d9f2d36adfc8ab@desertsol.com>	<2f4797b8f3c8328faac3df0af6406263@desertsol.com>
	<96108223673103d9feba0be06282e9b7@desertsol.com>
In-Reply-To: <96108223673103d9feba0be06282e9b7@desertsol.com>
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Kevin Geiss wrote:

>
> On Feb 3, 2005, at 7:32 AM, Kevin Geiss wrote:
>
>> wait, I'm running into a problem still. I'm on my laptop, I want to
>> 'pull' from my archive at desertsol.com to a local mirror on my laptop:
>>
>> 7:14AM0quasar>tla archive-mirror
>> kevin@desertsol.com--2005-home-SOURCE kevin@desertsol.com--2005-home
>> arch_archive_connect: attempt to connect to wrong mirror
>>   archive: kevin@desertsol.com--2005-home
>>   wanted mirror of: kevin@desertsol.com--2005-home
>>   got mirror of: kevin@desertsol.com--2005-home-SOURCE
>> 7:23AM1quasar>tla archives
>> kevin@desertsol.com--2005-home
>>     /Users/kevin/arch/2005-home-MIRROR
>> kevin@desertsol.com--2005-home-SOURCE
>>     sftp://desertsol.com/data/archives/2005-home
>>
>> I'm sure if I temporarily registered
>> sftp://desertsol.com/data/archives/2005-home with its true name
>> (kevin@desertsol.com--2005-home) and the local mirror with the name
>> kevin@desertsol.com--2005-home-MIRROR it would work, but then I would
>> need to un-register them, and register the local mirror with the name
>> kevin@desertsol.com--2005-home to be able to do anything with it. I'd
>> rather register them once. what am I missing now?
>
>
> I checked the =meta-info of my local mirror. the 'name' and 'mirror'
> files both contain 'kevin@desertsol.com--2005-home-SOURCE'.
>
> so I re-'make archive'ed the mirror, so that it has
> 'kevin@desertsol.com--2005-home' in the name and mirror files. to do
> that, I registered the real archive with the
> 'kevin@desertsol.com--2005-home' name, rather than the -SOURCE name.
>
> after the initial archive-mirror command finished, I re-registered the
> two archives using the -SOURCE name for the 'real' archive and the
> normal name for the mirror. then archive-mirror was able to mirror
> from the -SOURCE to the local mirror.
>
> so I guess the important part is what is stored in the 'name' and
> 'mirror' meta-info files. the easiest way to set those correctly is to
> use temporary names when first creating the mirror, then switching to
> names you plan to use after that.


Actually, =meta-info/name should always contain the "real" name. It is a
mirror, but that is the archive it is a mirror of. I'm not really sure
what should go into =meta-info/mirror. I think it is actually not ever
read. Just having the file means that the archive is treated as a mirror
(no committing).

What *is* important is how you have registered the archives. There are
two possibilities for archive-mirror

$realpath => path to real
$real => archive name of real

# This is used when you want a remote mirror of your local archive
# It is a mirror that you push your changes to, but all of the normal
commands
# (changes, revisions, etc) will use the archive in $realpath

tla register-archive $realpath
# same as tla register-archive $real $realpath, the real archive is
registered with it's correct name
tla make-archive --mirror $real $mirrorpath
# Now mirror has been registered as $real-MIRROR
tla archive-mirror $real

# Now if you want to register someone else's archive, and create a local
mirror of it
# This is called a pull mirror, since you pull the other archives
patches locally.
# This is designed so that changes, revisions, etc all look at the
mirror rather than
# the original. You still cannot commit to the mirror, though.

tla register-archive $real-SOURCE $realpath
tla make-archive --mirror-from $real-SOURCE $mirrorpath
# Now ~/.arch-params/=locations has $mirrorpath as the location for $real
tla archive-mirror $real

Basically tla archive-mirror looks at your local registry to figure out
whether it is push mirroring or pull mirroring. Since you are trying to
create a local mirror of a remote repository so that you can work
offline, you want a pull-mirror. So you need to do the second steps.

You really should *never* have to change anything in =meta-info. In
fact, it is generally bad form to touch anything in the archive
manually. You can get away with a lot, but you can also potentially
corrupt your archive.

John
=:->


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