Script to create tarball of differences.

tools/determinism/create_diffs_tarball.py

Index: tools/determinism/create_diffs_tarball.py
diff --git a/tools/determinism/create_diffs_tarball.py b/tools/determinism/create_diffs_tarball.py
new file mode 100755
index 0000000000000000000000000000000000000000..fdb7d635ab6fa6fad72391ec7fefa46bff1d0eb2
--- /dev/null
+++ b/tools/determinism/create_diffs_tarball.py
@@ -0,0 +1,60 @@
+#!/usr/bin/env python
+# Copyright 2016 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.
+
+"""Create tarball of differences."""
+
+import argparse
+import json
+import os
+import shutil
+import sys
+import tarfile
+import tempfile
+
+
+def CreateArchive(first, second, input_files, output_file):
+  """Create archive of input files to output_dir.
+
+  Args:
+    first: the first build directory.
+    second: the second build directory.
+    input_files: list of input files to be archived.
+    output_file: an output file.
+  """
+  with tarfile.open(name=output_file, mode='w:gz') as tf:
+    for f in input_files:
+      tf.add(os.path.join(first, f))
+      tf.add(os.path.join(second, f))
+
+
+def main():
+  parser = argparse.ArgumentParser()
+  parser.add_argument('-f', '--first-build-dir',
+                      help='The first build directory')
+  parser.add_argument('-s', '--second-build-dir',
+                      help='The second build directory')
+  parser.add_argument('--json-input',
+                      help='JSON file to specify list of files to archive.')
+  parser.add_argument('--output', help='output filename.')
+  args = parser.parse_args()
+
+  if not args.first_build_dir:
+    parser.error('--first-build-dir is required')
+  if not args.second_build_dir:
+    parser.error('--second-build-dir is required')
+  if not args.json_input:
+    parser.error('--json-input is required')
+  if not args.output:
+    parser.error('--output is required')
+
+  with open(args.json_input) as f:
+    input_files = json.load(f)
+
+  CreateArchive(args.first_build_dir, args.second_build_dir, input_files,
+                args.output)
+
+
+if __name__ == '__main__':
+  sys.exit(main())