gitolite/doc/1-migrate.mkd

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# migrating from gitosis to gitolite
[TODO: make the migration tool fix up gitweb and daemon control also...]
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Migrating from gitosis to gitolite is pretty easy, because the basic design is
the same.
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Here's how we migrated my work repos:
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1. login as the `git` user on the server, and get a bash shell prompt
2. **disable gitosis** by renaming `/usr/bin/gitosis-serve` to something
else. This will prevent users from pushing anything while you do the
backup, migration, etc.
3. **edit** `~/.ssh/authorized_keys` and **carefully** remove all the lines
containing "gitosis-serve", as well as the marker line that says
"auto-generated by gitosis, DO NOT REMOVE", then save the file. If the
file did not have any other keys and is now empty, don't worry -- save it
anyway because gitolite expects the file to be present (even if it is
empty).
4. For added safety, **delete** the post-update hook that gitosis-admin
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installed
rm ~/repositories/gitosis-admin.git/hooks/post-update
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or at least rename it to `.sample` like all the other hooks hanging
around, or edit it and comment out the line that calls `gitosis-run-hook
post-update`.
If you do not do this, an accidental push to the gitosis-admin repo will
mess up your `~/.ssh/authorized_keys` file
5. take a **backup** of the `~/repositories` directory
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Now, log off the server and get back to the client:
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[inst]: http://github.com/sitaramc/gitolite/blob/pu/doc/0-INSTALL.mkd
1. follow instructions to install gitolite; see the [install document][inst].
Make sure that you **don't** change the default path for `$REPO_BASE` if
you edit the config file!
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2. **convert** your gitosis config file. Substitute the path for your
gitosis-admin clone in `$GSAC` below, and similarly the path for your
gito**lite**-admin clone in `$GLAC`
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src/conf-convert.pl < $GSAC/gitosis.conf > $GLAC/gitolite.conf
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Be sure to check the file to make sure it converted correctly
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3. **copy** the keys from gitosis's keydir (same meanings for GSAC and GLAC)
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cp $GSAC/keydir/* $GLAC/keydir
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4. **Important: expand any multi-key files you may have**. [Here][mk]'s an
explanation of what multi-keys are, how gitosis does them and how gitolite
does it differently.
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You can split the keys manually, or use the following code (just
copy-paste it into your xterm after "cd"-ing to your gitolite-admin repo
clone):
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wc -l keydir/*.pub | grep -v total | grep -v -w 1 | while read a b
do
i=1
cat $b|while read l
do
echo "$l" > ${b%.pub}@$i.pub
(( i++ ))
done
mv $b $b.done
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done
This will split each multi-key file (say "sitaram.pub") into individual
files called "sitaram@1.pub", "sitaram@2.pub", etc., and rename the
original to "sitaram.pub.done" so gitolite won't pick it up.
At this point you can rename the split parts more appropriately, like
"sitaram@laptop.pub" and "sitaram@desktop.pub" or whatever. *Please check
the files to make sure this worked properly*
5. Check all your changes to your gitolite-admin clone, commit, and push
[mk]: http://github.com/sitaramc/gitolite/blob/pu/doc/3-faq-tips-etc.mkd#multikeys