Package the translation_unit tool as part of building the clang package.

build/download_translation_unit_tool.py

Index: build/download_translation_unit_tool.py
diff --git a/build/download_translation_unit_tool.py b/build/download_translation_unit_tool.py
new file mode 100755
index 0000000000000000000000000000000000000000..c67d51d7e62955bc4c9943b638388e470861144e
--- /dev/null
+++ b/build/download_translation_unit_tool.py
@@ -0,0 +1,53 @@
+#!/usr/bin/env python
+# Copyright 2017 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.
+
+"""Script to download Clang translation_unit tool from google storage."""
+
+import find_depot_tools
+import json
+import os
+import shutil
+import subprocess
+import sys
+import tarfile
+
+SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
+CHROME_SRC = os.path.abspath(os.path.join(SCRIPT_DIR, os.pardir))
+
+
+DEPOT_PATH = find_depot_tools.add_depot_tools_to_path()
+GSUTIL_PATH = os.path.join(DEPOT_PATH, 'gsutil.py')
+
+LLVM_BUILD_PATH = os.path.join(CHROME_SRC, 'third_party', 'llvm-build',
+                               'Release+Asserts')
+CLANG_UPDATE_PY = os.path.join(CHROME_SRC, 'tools', 'clang', 'scripts',
+                               'update.py')
+CLANG_REVISION = os.popen(CLANG_UPDATE_PY + ' --print-revision').read().rstrip()
+
+CLANG_BUCKET = 'gs://chromium-browser-clang'
+
+
+def main():
+  targz_name = 'translation_unit-%s.tgz' % CLANG_REVISION
+
+  if sys.platform == 'win32' or sys.platform == 'cygwin':
+    cds_full_url = CLANG_BUCKET + '/Win/' + targz_name
+  elif sys.platform == 'darwin':
+    cds_full_url = CLANG_BUCKET + '/Mac/' + targz_name
+  else:
+    assert sys.platform.startswith('linux')
+    cds_full_url = CLANG_BUCKET + '/Linux_x64/' + targz_name
+
+  os.chdir(LLVM_BUILD_PATH)
+
+  subprocess.check_call(['python', GSUTIL_PATH,
+                         'cp', cds_full_url, targz_name])
+  tarfile.open(name=targz_name, mode='r:gz').extractall(path=LLVM_BUILD_PATH)
+
+  os.remove(targz_name)
+  return 0
+
+if __name__ == '__main__':
+  sys.exit(main())