Issue 1807 - Allow suppressing output of ensure_dependencies.py

ensure_dependencies.py

 #!/usr/bin/env python
 # coding: utf-8
 
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 import sys
 import os
 import posixpath
 import re
 import io
 import errno
 import logging
 import subprocess
 import urlparse
+import argparse
 
 from collections import OrderedDict
 from ConfigParser import RawConfigParser
 
 USAGE = """
 A dependencies file should look like this:
 
   # VCS-specific root URLs for the repositories
   _root = hg:https://hg.adblockplus.org/ git:https://github.com/adblockplus/
   # File to update this script from (optional)
@@ skipping 244 matching lines @@
     file_content = [l.strip() for l in f.readlines()]
     if not pattern in file_content:
       file_content.append(pattern)
       f.seek(0, os.SEEK_SET)
       f.truncate()
       for l in file_content:
         print >>f, l
 
 if __name__ == "__main__":
   logging.basicConfig(format='%(levelname)s: %(message)s', level=logging.INFO)
-  repos = sys.argv[1:]
+
+  parser = argparse.ArgumentParser(description="Verify dependencies for a set of repositories, by default the repository of this script.")
+  parser.add_argument("repos", metavar="repository", type=str, nargs="*", help="Repository path")
+  parser.add_argument("-q", "--quiet", action="store_true", help="Suppress informational output")
+  args = parser.parse_args()
+
+  if args.quiet:
+    logging.disable(logging.INFO)
+
+  repos = args.repos
   if not len(repos):
     repos = [os.path.dirname(__file__)]
   for repo in repos:
     resolve_deps(repo)