Re: svn repository URL and git

H Krishnan wrote:

quoted

Hi, 
We have started using git and git-svn. 
I was thrilled to see that two people cloning using "git svn clone" 
from the same repository got the same sha1 IDs for the commits which 
meant that each of us could sync with svn independently while still 
being able to share code among ourselves. 
But my excitement was shortlived as the sha1 IDs were different if we 
refer to the svn server using an alias. For example, using 
http://mysvnserver.mydomain.com/repos/myproject/trunk gave different 
sha1 IDs from using http://mysvnserver/repos/myproject/trunk even 
though both refer to the same repository. This also disallowed using 
mirrors of the repository for cloning. 
Apparently the sha1 ID is generated from the full path of the URL. 
Instead of this, could git-svn init be made to accept an optional 
"prefix" argument as well which is filtered out of the URL before 
building the sha1 ID. This will allow easy support for the oft 
requested support for "svn switch --relocate". How much of an effort 
is this? I don't know perl or git internals well enough for me to take 
a stab at it but I am willing to learn if someone can give me some 
pointers. 
Krishnan

The problem is the "git-svn-id" which is automatically appended to each
commit done with git-svn. This ID consists of the URL and the UUID of
the corresponding SVN repository. A different git-svn-id value results
in a different commit SHA1 (i.e. a different commit to git).

I guess git-svn's --rewrite-root option might help here. Also, you have
to make sure that your SVN repos have the same UUID (with svnadmin
setuuid), of course.

-Mathias

Thanks for your quick reply.

Could the git-svn-id also be based on only the suffix part of the URL? The 
prefix needs to be used only when connecting to the svn server and not 
otherwise. By default, the prefix is empty thereby getting back the current 
behavior.

I did try --rewrite-root but from what I understood of it, git-svn rebase will 
happen with the root I supply here and not from the local mirrors. We would like 
something like the following:

  users in place A  <--git-svn--> SVN mirror in place A
        ^                                 ^
        |                                 |
     git fetch/merge              some sort of rsync
        |                                 |
        v                                 v
  users in place B  <--git-svn--> SVN mirror in place B

Our corporate setup will not easily move to git but some sub-teams would like to 
use it for their work.

Regards,
Krishnan