In the current version of repo checkout, we often get the error:
error: no project has branch xyzzy
...even when the actual error was something else. This fixes it
to only report the 'no project has branch' when that is actually true.
This fix is very similar to one made for 'repo abandon':
https://review.source.android.com/#change,22207
The repo checkout error is filed as: <http://crosbug.com/6514>
TEST=manual
A sample creating a case where 'git checkout' will fail:
$ repo start branch1 .
$ repo start branch2 .
$ touch bogusfile
$ git add bogusfile
$ git commit -m "create bogus file"
[branch2 f8b6b08] create bogus file
0 files changed, 0 insertions(+), 0 deletions(-)
create mode 100644 bogusfile
$ echo "More" >> bogusfile
$ repo checkout branch1 .
error: chromite/: cannot checkout branch1
A sample case showing that we still fail if no project has a branch:
$ repo checkout xyzzy .
error: no project has branch xyzzy
Change-Id: I48a8e258fa7a9c1f2800dafc683787204bbfcc63
Most projects will have their branch heads matching in all branches,
so switching between them should be just a matter of updating the
work tree's HEAD symref. This can be done in pure Python, saving
quite a bit of time over forking 'git checkout'.
Signed-off-by: Shawn O. Pearce <sop@google.com>
