31   files = {}
45         files[next_file] = old_hash
46   return files
54 def CountMatchingFiles(commit, files):  argument
58   cmd = ["git", "ls-tree", "-r", commit] + [f for f in files]
63     expected_hash = files[filename]
68 def FindFirstMatchingCommit(start, files, limit, verbose):  argument
70   num_files = len(files)
73     matched_files = CountMatchingFiles(commit, files)
86   files = FindFilesInPatch(args.patch_file)  variable
87   commit = FindFirstMatchingCommit(args.branch, files, args.limit, args.verbose)