Merge "Add a script to help automate V8 updates."

1 files changed, 97 insertions, 0 deletions

diff --git a/merge.py b/merge.py
new file mode 100644
index 00000000..e388dace
--- /dev/null
+++ b/merge.py
@@ -0,0 +1,97 @@
+#!/usr/bin/env python
+
+import argparse
+import logging
+import os
+import re
+import shutil
+from genmakefiles import GenerateMakefiles
+
+AOSP_PATH = os.getcwd()
+UNWANTED_DIRS = [
+  'build/',
+  'test/',
+  'third_party/',
+  'buildtools/',
+  'tools/gyp',
+  'tools/swarming_client'
+]
+
+parser = argparse.ArgumentParser(description='Merge a new version of V8.')
+parser.add_argument('--v8_path', \
+  required=True, help='Absolute path to the new version of V8 to be merged.')
+args = parser.parse_args()
+
+# Find all the files that are in both the old and the new repo; remove them
+# (ie. leave the Android-only files in place)
+new_files = [f for f in os.listdir(args.v8_path) if not f.startswith(".")]
+current_files = [f for f in os.listdir(AOSP_PATH) if not f.startswith(".")]
+to_remove = [f for f in current_files if f in new_files]
+
+for file in to_remove:
+  path = os.path.join(AOSP_PATH, file)
+  if os.path.isfile(path):
+    os.remove(path)
+  else:
+    shutil.rmtree(path)
+
+# Copy accross the new files.
+all_new_v8 = os.path.join(args.v8_path, "*")
+rsync_cmd = "rsync -r --exclude=\"*.git*\" " + all_new_v8 + \
+  " . > /dev/null"
+if os.system(rsync_cmd) != 0:
+  raise RuntimeError("Could not rsync the new V8.")
+
+# Now remove extra stuff that AOSP doesn't want (to save space)
+for file in UNWANTED_DIRS:
+  path = os.path.join(AOSP_PATH, file)
+  shutil.rmtree(path)
+
+# Create new makefiles
+GenerateMakefiles()
+
+# Update V8_MERGE_REVISION
+major_version = 0
+minor_version = 0
+build_number = 0
+patch_level = 0
+
+success = True
+with open(os.path.join(AOSP_PATH, "include/v8-version.h"), 'r') as f:
+  content = f.read()
+  result = re.search("V8_MAJOR_VERSION (\\d*)", content)
+  if result != None:
+    major_version = result.group(1)
+  else:
+    success = False
+  result = re.search("V8_MINOR_VERSION (\\d*)", content)
+  if result != None:
+    minor_version = result.group(1)
+  else:
+    success = False
+  result = re.search("V8_BUILD_NUMBER (\\d*)", content)
+  if result != None:
+    build_number = result.group(1)
+  else:
+    success = False
+  result = re.search("V8_PATCH_LEVEL (\\d*)", content)
+  if result != None:
+    patch_level = result.group(1)
+  else:
+    success = False
+
+version_string = major_version + "." + \
+  minor_version + "." + \
+  build_number + "." + \
+  patch_level
+
+if not success:
+  logging.warning("Couldn't extract V8 version to update V8_MERGE_REVISION." + \
+     " Got " + version_string)
+else:
+  with open(os.path.join(AOSP_PATH, "V8_MERGE_REVISION"), 'w') as f:
+    f.write("v8 " + version_string + "\n")
+    f.write("https://chromium.googlesource.com/v8/v8/+/" + version_string)
+
+  # Done!
+  print "Merged V8 " + version_string + ". Test, commit and upload!"
\ No newline at end of file