Add --ignore-lock option.

git_cache.py

Index: git_cache.py
diff --git a/git_cache.py b/git_cache.py
index 1b135d50b425ae9bdab8201a140ece0311390b2a..dcc92cb25ca61ced03405477aba48dc5741cd967 100755
--- a/git_cache.py
+++ b/git_cache.py
@@ -317,7 +317,7 @@ class Mirror(object):
     return os.path.isfile(os.path.join(self.mirror_path, 'config'))
 
   def populate(self, depth=None, shallow=False, bootstrap=False,
-               verbose=False):
+               verbose=False, ignore_lock=False):
     assert self.GetCachePath()
     if shallow and not depth:
       depth = 10000
@@ -332,7 +332,11 @@ class Mirror(object):
       d = ['--depth', str(depth)]
 
 
-    with Lockfile(self.mirror_path):
+    lockfile = Lockfile(self.mirror_path)
+    if not ignore_lock:
+      lockfile.lock()
+
+    try:
       # Setup from scratch if the repo is new or is in a bad state.
       tempdir = None
       config_file = os.path.join(self.mirror_path, 'config')
@@ -380,6 +384,9 @@ class Mirror(object):
           logging.warn('Fetch of %s failed' % spec)
       if tempdir:
         os.rename(tempdir, self.mirror_path)
+    finally:
+      if not ignore_lock:
+        lockfile.unlock()
 
   def update_bootstrap(self):
     # The files are named <git number>.zip
@@ -497,6 +504,8 @@ def CMDpopulate(parser, args):
                     help='Specify additional refs to be fetched')
   parser.add_option('--no_bootstrap', action='store_true',
                     help='Don\'t bootstrap from Google Storage')
+  parser.add_option('--ignore-locks', action='store_true',

[Ryan Tseng, 2014/06/18 23:54:39]

--ignore_locks (matches no_bootstrap)

[szager1, 2014/06/19 20:35:33]

Done.

+                    help='Don\'t try to lock repository')
 
   options, args = parser.parse_args(args)
   if not len(args) == 1:
@@ -508,6 +517,7 @@ def CMDpopulate(parser, args):
       'verbose': options.verbose,
       'shallow': options.shallow,
       'bootstrap': not options.no_bootstrap,
+      'ignore_lock': options.ignore_locks,
   }
   if options.depth:
     kwargs['depth'] = options.depth