Add git-reup and friends

git_squash_branch.py

Index: git_squash_branch.py
diff --git a/git_squash_branch.py b/git_squash_branch.py
new file mode 100755
index 0000000000000000000000000000000000000000..408bb582b5e7e597ce2fe1887df86b6e72db22b2
--- /dev/null
+++ b/git_squash_branch.py
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+#!/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.
+
+import sys
+
+from git_common import squash_current_branch
+
+def main(args):
+  # TODO(iannucci): Use argparse
+  header = None
+  if len(args) > 2:
+    print "Usage: git squash [optional_message]"
+  elif len(args) == 2:
+    header = args[1]
+  squash_current_branch(header)
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))