"GIT backend not available" on OpenSUSE

[Jun Omae]

Git module doesn't work on OpenSUSE. The issue from ​th:#8682 and ​https://bugzilla.novell.com/show_bug.cgi?id=697156.

Trac [/tmp/tracenv]> repository resync ''
17:23:16 Trac[git_fs] ERROR: GitError: Could not retrieve GIT version (tried to execute/parse '/usr/bin/git-receive-pack --version' but got ValueError('need more than 0 values to unpack',))
TracError: GIT backend not available

/usr/bin/git in OpenSUSE is a symbolic link and Trac wrongly follows the link.

linux@linux:/> ls -l /usr/bin/git
lrwxrwxrwx 1 root root 18 Dec 26 16:58 /usr/bin/git -> ../lib/git/git-add

Trac should use Option instead of PathOption, confirmed with OpenSUSE 12.2.

tracopt/versioncontrol/git/git_fs.py

@@ -199 +199 @@
     git_fs_encoding = Option('git', 'git_fs_encoding', 'utf-8',
         """Define charset encoding of paths within git repositories.""")
 
-    git_bin = PathOption('git', 'git_bin', '/usr/bin/git',
+    git_bin = Option('git', 'git_bin', '/usr/bin/git',
         """Path to git executable (relative to the Trac configuration folder,
         so better use an absolute path here).""")
 

[Christian Boos]

Ok, though it's a path we deal with here, we don't want the special handling of relative paths that PathOption does. Patch is fine for me, except for the docstring which should be adapted to the change (e.g. """Absolute path to the git executable.""").

[fbrettschneider@…]

I see a similar error with ​Bitnami-Trac-1.0.0, "Native" on Windows:

[2013-01-07 12:11:49,723 p3156:t2624] git_fs.py:117 ERROR: GitError: Could not retrieve GIT version (tried to execute/parse 'd:\usr\bin\git --version' but got WindowsError(3, 'The system cannot find the path specified'))
[2013-01-07 12:12:29,552 p2384:t3536] main.py:511 WARNING: [172.20.20.85] HTTPInternalError: 500 Trac-Fehler (GIT backend not available)

The path D:\usr\bin\git is wrong. There aint no such path on my Windows server here.

[Christian Boos]

Replying to fbrettschneider@…:

… The path D:\usr\bin\git is wrong. There aint no such path on my Windows server here.

Well, that wrong path is as "good" as any other wrong path… On Windows we have no way to figure out where you installed git, so you have to configure this in the .ini.

[fbrettschneider@…]

Replying to cboos:

Well, that wrong path is as "good" as any other wrong path… On Windows we have no way to figure out where you installed git, so you have to configure this in the .ini.

I see, thanks for the hint, didn't know that. I just read wiki:TracGit and it wasn't mentioned there. Perhaps, it's a good idea to test the default path if there is such git executable located, and give a warning message if not.

[Christian Boos]

Jun, do you plan to commit that one as well?

[Jun Omae]

I just committed the patch with your suggestions in [11512-11513]!

Well, it might good to be git as default of the option for Windows users….

[Christian Boos]

Well, now that you propose it, if that's also a sane choice on Linux, we should make it that way.

[Jun Omae]

Yes. Most linux users have probably git command in the PATH environment. Committed in [11519-11520].