Have you tried asking in a git forum/list?
There must be some people with knowledge of git that also use bacula, but I 
would think you'd have more luck there.

Stack overflow is also a good place for all things developer:
http://stackoverflow.com/questions/12129148/incremental-backups-with-git-bundle-for-all-branches


They seem to take an approach of 'to make an incremental backup, git needs 
access to the previous backup to see what's already in there'.

Someone also suggests --since, but the danger in that is that you risk skipping 
changes if you don't specify the _exact_ time and date of the previous backup 
(or earlier). Also, if a backup ever fails, the next one (the next day) will 
just proceed as if it succeeded.


-----Original Message-----
From: Thorsten Reichelt [mailto:bacula-users AT thorsten-reichelt DOT de] 
Sent: 11 February 2015 19:05
To: bacula-users AT lists.sourceforge DOT net
Subject: [Bacula-users] Backing up a bare git repository in full and 
incremental mode

Hi!

I have to backup one or more bare git repositories but I cannot figure
out whats the best way to do this.

I want to use this backup plan:
Every month => full backup (all branches, tags...)
Every night => incremental backup (changes since last incremental/full)

For that I run a pre-backup script that calls

===
cd $repo
git bundle create /tmp/gitbackups/$repo-all --all
===

for every found repository to perform the monthly full backup.
But I am not shure how to perform an incremental or differential backup
with git. For my SVN repositories I can simply call something like
"svnadmin dump -r 1024 --incremental > /tmp/svnbackups/$repo-inc".

But how to handle this with git?
Maybe I can call "git bundle create --since="yesterday"
/tmp/gitbackups/$repo-inc --all" but seems not to be the same.

Are there any working solutions for this? ;)

Thorsten

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