Generalize python_git_runner for use in non-git scripts.

Generalize python_git_runner for use in non-git scripts.

Also fixes an msys (git-bash) incompatibility, similar to the one
fixed in crrev.com/4845f0ed694ff071da5f6ee937a0bce2ea4e6fd2.

This change doesn't actually use the wrapper in any new places, but
subsequent changes will be made to use it in places where
'exec python' is called directly, like gclient and fetch.

BUG=411518
R=iannucci@google.com

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=297357

[Michael Moss, 2015-10-22 15:03:54]

ping

[Michael Moss, 2015-10-27 21:43:40]

ping

[iannucci, 2015-10-27 22:00:12]

On 2015/10/27 at 21:43:40, mmoss wrote:
> ping

Sorry, was OOO till today. Looking now.

[iannucci, 2015-10-27 22:04:39]

iannucci@chromium.org changed reviewers:
+ iannucci@chromium.org

[iannucci, 2015-10-27 22:04:39]

lgtm

[Michael Moss, 2015-10-28 15:04:27]

The CQ bit was checked by mmoss@chromium.org

[commit-bot: I haz the power, 2015-10-28 15:04:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1415993003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1415993003/1

[commit-bot: I haz the power, 2015-10-28 15:06:12]

Committed patchset #1 (id:1) as
http://src.chromium.org/viewvc/chrome?view=rev&revision=297357

[Adrian Kuegel, 2015-10-28 15:38:25]

On 2015/10/28 15:06:12, commit-bot: I haz the power wrote:
> Committed patchset #1 (id:1) as
> http://src.chromium.org/viewvc/chrome?view=rev&revision=297357

Is it possible that this did break the bots? issue crbug.com/548677

[Adrian Kuegel, 2015-10-28 15:41:03]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1414923008/ by akuegel@chromium.org.

The reason for reverting is: Speculative revert in case this caused the bots to
fail bot_update..

[sky, 2015-10-28 16:12:44]

On 2015/10/28 15:41:03, Adrian Kuegel wrote:
> A revert of this CL (patchset #1 id:1) has been created in
> https://codereview.chromium.org/1414923008/ by mailto:akuegel@chromium.org.
> 
> The reason for reverting is: Speculative revert in case this caused the bots
to
> fail bot_update..

This broke me locally. By locally I mean windows with msys. Here's the error I
get:

$ git cl
/c/src/depot_tools/python_runner.sh: line 35:
d:/src/builds/build2/src/c:\src\depot_tools\git_cl.py: No such file or directory
/c/src/depot_tools/python_runner.sh: line 35: exec:
d:/src/builds/build2/src/c:\src\depot_tools\git_cl.py: cannot execute: No such
file or directory

[sky, 2015-10-28 16:16:09]

On 2015/10/28 16:12:44, sky wrote:
> On 2015/10/28 15:41:03, Adrian Kuegel wrote:
> > A revert of this CL (patchset #1 id:1) has been created in
> > https://codereview.chromium.org/1414923008/ by mailto:akuegel@chromium.org.
> > 
> > The reason for reverting is: Speculative revert in case this caused the bots
> to
> > fail bot_update..
> 
> This broke me locally. By locally I mean windows with msys. Here's the error I
> get:
> 
> $ git cl
> /c/src/depot_tools/python_runner.sh: line 35:
> d:/src/builds/build2/src/c:\src\depot_tools\git_cl.py: No such file or
directory
> /c/src/depot_tools/python_runner.sh: line 35: exec:
> d:/src/builds/build2/src/c:\src\depot_tools\git_cl.py: cannot execute: No such
> file or directory

Yep, it was this patch that caused me grief. Syncing to the revert I can now git
cl upload again.