1398 - Improve compatibility with older git(1) versions

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
@@ skipping 49 matching lines @@
   def istype(self, repodir):
     return os.path.exists(os.path.join(repodir, ".git"))
 
   def clone(self, source, target):
     source = source.rstrip("/")
     if not source.endswith(".git"):
       source += ".git"
     subprocess.check_call(["git", "clone", "--quiet", source, target])
 
   def get_revision_id(self, repo, rev="HEAD"):
-    command = ["git", "-C", repo, "rev-parse", "--revs-only", rev]
-    return subprocess.check_output(command).strip()
+    command = ["git", "rev-parse", "--revs-only", rev]
+    return subprocess.check_output(command, cwd=repo).strip()
 
   def pull(self, repo):
-    subprocess.check_call(["git", "-C", repo, "fetch", "--quiet", "--all", "--tags"])
+    subprocess.check_call(["git", "fetch", "--quiet", "--all", "--tags"], cwd=repo)
 
   def update(self, repo, rev):
-    subprocess.check_call(["git", "-C", repo, "checkout", "--quiet", rev])
+    subprocess.check_call(["git", "checkout", "--quiet", rev], cwd=repo)
 
 repo_types = {
   "hg": Mercurial(),
   "git": Git(),
 }
 
 def parse_spec(path, line):
   if "=" not in line:
     logging.warning("Invalid line in file %s: %s" % (path, line))
     return None, None
@@ skipping 147 matching lines @@
       else:
         logging.warning("Cannot restart %s automatically, please rerun" % target)
 
 if __name__ == "__main__":
   logging.basicConfig(format='%(levelname)s: %(message)s', level=logging.INFO)
   repos = sys.argv[1:]
   if not len(repos):
     repos = [os.getcwd()]
   for repo in repos:
     resolve_deps(repo)