Command not found errors

[Eric Lake <ericlake gmail com>]

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At work we are using meld 1.2 in our production environment with svn.
Most of the time there are no issues at all and everything runs really
well. However there are times when we see the following error:

sh: bzr: command not found

The thing is that we do not have bzr loaded on any of the systems. We
only use svn and in some cases git. I have been able to recreate the
issue locally and here are the steps.

1) In a dir that is under svn version control do a "meld .". This gives
just what would be expected.
2) Do a "mkdir .bzr" (doesn't need to be a real bzr pull or anything"
and then run "meld ." again. You will not see any files listed that show
that they have diff information. In the terminal window where you
started meld you will see the error message "sh: bzr: command not
found". Don't do anything at this point other than close the meld window.
3) Remove the .bzr dir with a "rmdir .bzr"
4) Run "meld ." again and it should be back to the working condition again.
5) Run "mkdir .bzr" again and then start meld once more. This time when
in the meld window click the update button. Meld will attempt to do a
bzr pull. You will once again see the command not found error.
6) Remove the .bzr dir again.
7) Start meld again. Assuming that you get the same results that I have
been getting then you should have the same issue as if the .bzr dir were
still there.

The only way that we have found to get back to a working state is to
reboot the box. I can only assume that something is being cached but I
can not find out where.

Note that the 1.3 version of meld has the same issue but throws a
traceback as shown below. The difference is that I can remove the .bzr
folder and get the system back to working order without a reboot.


[Wed 10/06/23 20:09 EDT][pts/2][i386/linux-gnu/2.6.33.5-124.fc13.i686.PAE]
<elake carter:~/code/svntest>
zsh 175 [1]  (svn)-[testrepo:1]-% ls -a
.  ..  .bzr  foo.py  .svn

[Wed 10/06/23 20:09 EDT][pts/2][i386/linux-gnu/2.6.33.5-124.fc13.i686.PAE]
<elake carter:~/code/svntest>
zsh 176  (svn)-[testrepo:1]-% /usr/bin/meld .
Traceback (most recent call last):
  File "/usr/share/meld/task.py", line 130, in iteration
    ret = task()
  File "/usr/share/meld/vcview.py", line 290, in _search_recursively_iter
    self.vc.cache_inventory(rootname)
  File "/usr/share/meld/vc/_vc.py", line 178, in cache_inventory
    self._tree_cache = self._lookup_tree_cache(directory)
  File "/usr/share/meld/vc/bzr.py", line 64, in _lookup_tree_cache
    branch_root = _vc.popen([self.CMD] + self.CMDARGS + ["root",
rootdir]).read().rstrip('\n')
  File "/usr/share/meld/vc/_vc.py", line 192, in popen
    return subprocess.Popen(cmd, cwd=cwd, stdout=subprocess.PIPE).stdout
  File "/usr/lib/python2.6/subprocess.py", line 621, in __init__
    errread, errwrite)
  File "/usr/lib/python2.6/subprocess.py", line 1126, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory


Thanks,
Eric Lake
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