llvm_tools: add a script to `cp` files to chromiumos-overlay

This is a manual and seemingly error-prone process. Why not automate it?

BUG=chromium:994322
TEST=./copy_helpers_to_chromiumos_overlay.py

Change-Id: I6d008810619c0595fbbd4155526b6ad10a5d466c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/1811966
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Tested-by: George Burgess <gbiv@chromium.org>

1 files changed, 66 insertions, 0 deletions

diff --git a/llvm_tools/copy_helpers_to_chromiumos_overlay.py b/llvm_tools/copy_helpers_to_chromiumos_overlay.py
new file mode 100755
index 00000000..dd6dc9d6
--- /dev/null
+++ b/llvm_tools/copy_helpers_to_chromiumos_overlay.py
@@ -0,0 +1,66 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# Copyright 2019 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Clones helper scripts into chromiumos-overlay.
+
+Some files in here also need to live in chromiumos-overlay (e.g., the
+patch_manager ones). This script simplifies the copying of those around.
+"""
+
+# Necessary until crbug.com/1006448 is fixed
+from __future__ import print_function
+
+import argparse
+import os
+import shutil
+import sys
+
+
+def _find_repo_root(script_root):
+  repo_root = os.path.abspath(os.path.join(script_root, '../../../../'))
+  if not os.path.isdir(os.path.join(repo_root, '.repo')):
+    return None
+  return repo_root
+
+
+def main():
+  parser = argparse.ArgumentParser(description=__doc__)
+  parser.add_argument(
+      '--chroot_path',
+      help="Path to where CrOS' source tree lives. Will autodetect if you're "
+      'running this from inside the CrOS source tree.')
+  args = parser.parse_args()
+
+  my_dir = os.path.abspath(os.path.dirname(__file__))
+
+  repo_root = args.chroot_path
+  if repo_root is None:
+    repo_root = _find_repo_root(my_dir)
+    if repo_root is None:
+      sys.exit("Couldn't detect the CrOS checkout root; please provide a "
+               'value for --chroot_path')
+
+  chromiumos_overlay = os.path.join(repo_root,
+                                    'src/third_party/chromiumos-overlay')
+
+  clone_files = [
+      'failure_modes.py',
+      'get_llvm_hash.py',
+      'patch_manager.py',
+      'subprocess_helpers.py',
+  ]
+
+  filesdir = os.path.join(chromiumos_overlay,
+                          'sys-devel/llvm/files/patch_manager')
+  for f in clone_files:
+    source = os.path.join(my_dir, f)
+    dest = os.path.join(filesdir, f)
+    print('%r => %r' % (source, dest))
+    shutil.copyfile(source, dest)
+
+
+if __name__ == '__main__':
+  main()