Make git auto-svn idempotent.

Make git auto-svn idempotent.

By directly using git-config rather than git-svn-init, this ensures that
crazy values don't get set. It could be "safer" (e.g. check to see if any
other git-svn configuration already exists and prompt before overwriting it),
but I think that simplicity is better here.

R=pgervais@chromium.org
BUG=425838
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=292640

[pgervais, 2014-10-23 15:38:21]

On 2014/10/23 10:39:46, agable wrote:

lgtm, but it has the downside of using 'internals' of git-svn. I mean that the
svn-remote.svn.* values are probably not part of the public API (but I may be
wrong)

[agable, 2014-10-24 08:12:15]

On 2014/10/23 15:38:21, pgervais wrote:
> On 2014/10/23 10:39:46, agable wrote:
> 
> lgtm, but it has the downside of using 'internals' of git-svn. I mean that the
> svn-remote.svn.* values are probably not part of the public API (but I may be
> wrong)

They are part of the public api, documented at the very bottom of this page:
https://www.kernel.org/pub/software/scm/git/docs/git-svn.html

[agable, 2014-10-24 08:13:07]

Committed patchset #1 (id:1) manually as 292640.

[Sam Clegg, 2014-10-24 23:47:12]

On 2014/10/24 08:13:07, agable wrote:
> Committed patchset #1 (id:1) manually as 292640.

I've getting presubmit errors due to prefix now not be referenced:
https://codereview.chromium.org/667793005/

Should I just remove this variable in my CL?

[pgervais, 2014-10-24 23:58:17]

On 2014/10/24 23:47:12, Sam Clegg wrote:
> On 2014/10/24 08:13:07, agable wrote:
> > Committed patchset #1 (id:1) manually as 292640.
> 
> I've getting presubmit errors due to prefix now not be referenced:
> https://codereview.chromium.org/667793005/
> 
> Should I just remove this variable in my CL?

Could you file another CL just for that? I'll lgtm it.