def assert_gets_and_sets_revision(self, before, after, rev_before='deadbeef'):
local_scope = gclient_eval.Exec('\n'.join(before))
result = gclient_eval.GetRevision(local_scope, 'src/dep')
self.assertEqual(result, rev_before)
gclient_eval.SetRevision(local_scope, 'src/dep', 'deadfeed')
self.assertEqual('\n'.join(after), gclient_eval.RenderDEPSFile(local_scope))
def calculate_roll(full_dir, dependency, gclient_dict, roll_to):
"""Calculates the roll for a dependency by processing gclient_dict, and
fetching the dependency via git.
"""
head = gclient_eval.GetRevision(gclient_dict, dependency)
if not head:
raise Error('%s is unpinned.' % dependency)
check_call(['git', 'fetch', 'origin', '--quiet'], cwd=full_dir)
roll_to = check_output(['git', 'rev-parse', roll_to], cwd=full_dir).strip()
return head, roll_to
