Turn on git diff copy detection for git-cl upload.

git_cl.py

Index: git_cl.py
diff --git a/git_cl.py b/git_cl.py
index 2c63d7330cafd947151134f864714f77e8e918b6..b6097db1ac68b056304bf9e0e3c73b66cf27e182 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -1112,7 +1112,8 @@ def CMDupload(parser, args):
   if 'GIT_EXTERNAL_DIFF' in env:
     del env['GIT_EXTERNAL_DIFF']
   subprocess2.call(
-      ['git', 'diff', '--no-ext-diff', '--stat', '-M'] + args, env=env)
+      ['git', 'diff', '--no-ext-diff', '--stat', '-M', '-C',
+       '--find-copies-harder'] + args, env=env)

[M-A Ruel, 2012/05/22 20:26:11]

You mean -C -C or -M -M?
There's no meaning to -M -C.

But -C would just work.

[cmp, 2012/05/22 20:31:30]

If -C implies -M, then this should change to -C --find-copies-harder.  In 'git
help diff', -C is described as "Detect copies as well as renames."  Besides
that, there's no other text in -C or -M that says one implies the other.  If
you're confident that -C implies -M, I'll change this to drop -M.
Can you explain what you meant by this?  Does it relate to --find-copies-harder?

[cmp, 2012/05/22 20:43:20]

Done.

 
   if settings.GetIsGerrit():
     return GerritUpload(options, args, cl)