add a repack utility for combining .pak files generated

by grit into a single .pak file.

Review URL: http://codereview.chromium.org/18254


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@8063 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 40 insertions, 0 deletions

diff --git a/tools/data_pack/repack.py b/tools/data_pack/repack.py
new file mode 100755
index 0000000..5d7a344
--- /dev/null
+++ b/tools/data_pack/repack.py
@@ -0,0 +1,40 @@
+#!/usr/bin/python
+# Copyright (c) 2008 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.
+
+"""A simple utility function to merge data pack files into a single data pack.
+See base/pack_file* for details about the file format.
+"""
+
+import exceptions
+import struct
+import sys
+
+import data_pack
+
+def RePack(output_file, input_files):
+  """Write a new data pack to |output_file| based on a list of filenames
+  (|input_files|)"""
+  resources = {}
+  for filename in input_files:
+    new_resources = data_pack.ReadDataPack(filename)
+
+    # Make sure we have no dups.
+    duplicate_keys = set(new_resources.keys()) & set(resources.keys())
+    if len(duplicate_keys) != 0:
+      raise exceptions.KeyError("Duplicate keys: " + str(list(duplicate_keys)))
+
+    resources.update(new_resources)
+
+  data_pack.WriteDataPack(resources, output_file)
+
+def main(argv):
+  if len(argv) < 4:
+    print ("Usage:\n  %s <output_filename> <input_file1> <input_file2> "
+        "[input_file3] ..." % argv[0])
+    sys.exit(-1)
+  RePack(argv[1], argv[2:])
+
+if '__main__' == __name__:
+  main(sys.argv)