repo download: add --revert option

BZ: 4779
Allows to revert a gerrit patch
This patch is necessary for the on-demand creation of
engineering builds using buildbot

You can now use:
repo download [--revert|-r project changeid/patchnumber

This is useful to automate reverting of a patch
in the context of build automation, and regression bisection

Change-Id: I3985e80e4b2a230f83526191ea1379765a54bdcf
Signed-off-by: Erwan Mahe <erwan.mahe@intel.com>
Signed-off-by: Pierre Tardy <pierre.tardy@intel.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/project.py b/project.py
index 49da34a8..1b0769a6 100644
--- a/project.py
+++ b/project.py
@@ -1645,6 +1645,15 @@ class Project(object):
       if self._allrefs:
         raise GitError('%s cherry-pick %s ' % (self.name, rev))
 
+  def _Revert(self, rev, quiet=False):
+    cmd = ['revert']
+    cmd.append('--no-edit')
+    cmd.append(rev)
+    cmd.append('--')
+    if GitCommand(self, cmd).Wait() != 0:
+      if self._allrefs:
+        raise GitError('%s revert %s ' % (self.name, rev))
+
   def _ResetHard(self, rev, quiet=True):
     cmd = ['reset', '--hard']
     if quiet: