Set default --lock_timeout to 5m

git_cache.py

 #!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """A git command for managing a local cache of git repositories."""
 
 from __future__ import print_function
 import errno
 import logging
@@ skipping 75 matching lines @@
           return
         time.sleep(3)
       raise LockError('Failed to remove lock: %s' % lockfile)
     else:
       os.remove(self.lockfile)
 
   def lock(self):
     """Acquire the lock.
 
     This will block with a deadline of self.timeout seconds.
-    If self.timeout is zero, this is a NON-BLOCKING FAIL-FAST operation.
     """
     elapsed = 0
     while True:
       try:
         self._make_lockfile()
         return
       except OSError as e:
         if elapsed < self.timeout:
-          sleep_time = min(3, self.timeout - elapsed)
+          sleep_time = max(10, min(3, self.timeout - elapsed))
           logging.info('Could not create git cache lockfile; '
                        'will retry after sleep(%d).', sleep_time);
           elapsed += sleep_time
           time.sleep(sleep_time)
           continue
         if e.errno == errno.EEXIST:
           raise LockError("%s is already locked" % self.path)
         else:
           raise LockError("Failed to create %s (err %s)" % (self.path, e.errno))
 
@@ skipping 610 matching lines @@
   dispatcher = subcommand.CommandDispatcher(__name__)
   return dispatcher.execute(OptionParser(), argv)
 
 
 if __name__ == '__main__':
   try:
     sys.exit(main(sys.argv[1:]))
   except KeyboardInterrupt:
     sys.stderr.write('interrupted\n')
     sys.exit(1)