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roll_boringssl.py
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roll_boringssl.py
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#!/usr/bin/env python
# Copyright 2015 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.
"""Rolls third_party/boringssl/src in DEPS and updates generated build files."""
import os
import os.path
import shutil
import subprocess
import sys
SCRIPT_PATH = os.path.abspath(__file__)
SRC_PATH = os.path.dirname(os.path.dirname(os.path.dirname(SCRIPT_PATH)))
DEPS_PATH = os.path.join(SRC_PATH, 'DEPS')
BORINGSSL_PATH = os.path.join(SRC_PATH, 'third_party', 'boringssl')
BORINGSSL_SRC_PATH = os.path.join(BORINGSSL_PATH, 'src')
if not os.path.isfile(DEPS_PATH) or not os.path.isdir(BORINGSSL_SRC_PATH):
raise Exception('Could not find Chromium checkout')
# Pull OS_ARCH_COMBOS out of the BoringSSL script.
sys.path.append(os.path.join(BORINGSSL_SRC_PATH, 'util'))
import generate_build_files
GENERATED_FILES = [
'BUILD.generated.gni',
'BUILD.generated_tests.gni',
'err_data.c',
]
def IsPristine(repo):
"""Returns True if a git checkout is pristine."""
cmd = ['git', 'diff', '--ignore-submodules']
return not (subprocess.check_output(cmd, cwd=repo).strip() or
subprocess.check_output(cmd + ['--cached'], cwd=repo).strip())
def RevParse(repo, rev):
"""Resolves a string to a git commit."""
return subprocess.check_output(['git', 'rev-parse', rev], cwd=repo).strip()
def UpdateDEPS(deps, from_hash, to_hash):
"""Updates all references of |from_hash| to |to_hash| in |deps|."""
with open(deps, 'rb') as f:
contents = f.read()
if from_hash not in contents:
raise Exception('%s not in DEPS' % from_hash)
contents = contents.replace(from_hash, to_hash)
with open(deps, 'wb') as f:
f.write(contents)
def Log(repo, revspec):
"""Returns the commits in |repo| covered by |revspec|."""
data = subprocess.check_output(['git', 'log', '--pretty=raw', revspec],
cwd=repo)
commits = []
chunks = data.split('\n\n')
if len(chunks) % 2 != 0:
raise ValueError('Invalid log format')
for i in range(0, len(chunks), 2):
commit = {}
# Parse commit properties.
for line in chunks[i].split('\n'):
name, value = line.split(' ', 1)
commit[name] = value
if 'commit' not in commit:
raise ValueError('Missing commit line')
# Parse commit message.
message = ""
lines = chunks[i+1].split('\n')
# Removing the trailing empty entry.
if lines and not lines[-1]:
lines.pop()
for line in lines:
INDENT = ' '
if not line.startswith(INDENT):
raise ValueError('Missing indent')
message += line[len(INDENT):] + '\n'
commit['message'] = message
commits.append(commit)
return commits
def FormatCommit(commit):
"""Returns a commit formatted into a single line."""
rev = commit['commit'][:9]
line, _ = commit['message'].split('\n', 1)
return '%s %s' % (rev, line)
def main():
if len(sys.argv) > 2:
sys.stderr.write('Usage: %s [COMMIT]' % sys.argv[0])
return 1
if not IsPristine(SRC_PATH):
print >>sys.stderr, 'Chromium checkout not pristine.'
return 0
if not IsPristine(BORINGSSL_SRC_PATH):
print >>sys.stderr, 'BoringSSL checkout not pristine.'
return 0
if len(sys.argv) > 1:
new_head = RevParse(BORINGSSL_SRC_PATH, sys.argv[1])
else:
subprocess.check_call(['git', 'fetch', 'origin'], cwd=BORINGSSL_SRC_PATH)
new_head = RevParse(BORINGSSL_SRC_PATH, 'origin/master')
old_head = RevParse(BORINGSSL_SRC_PATH, 'HEAD')
if old_head == new_head:
print 'BoringSSL already up to date.'
return 0
print 'Rolling BoringSSL from %s to %s...' % (old_head, new_head)
# Look for commits with associated Chromium bugs.
crbugs = set()
crbug_commits = []
update_note_commits = []
log = Log(BORINGSSL_SRC_PATH, '%s..%s' % (old_head, new_head))
for commit in log:
has_bugs = False
has_update_note = False
for line in commit['message'].split('\n'):
lower = line.lower()
if lower.startswith('bug:') or lower.startswith('bug='):
for bug in lower[4:].split(','):
bug = bug.strip()
if bug.startswith('chromium:'):
crbugs.add(int(bug[len('chromium:'):]))
has_bugs = True
if lower.startswith('update-note:'):
has_update_note = True
if has_bugs:
crbug_commits.append(commit)
if has_update_note:
update_note_commits.append(commit)
UpdateDEPS(DEPS_PATH, old_head, new_head)
# Checkout third_party/boringssl/src to generate new files.
subprocess.check_call(['git', 'checkout', new_head], cwd=BORINGSSL_SRC_PATH)
# Clear the old generated files.
for (osname, arch, _, _, _) in generate_build_files.OS_ARCH_COMBOS:
path = os.path.join(BORINGSSL_PATH, osname + '-' + arch)
shutil.rmtree(path)
for f in GENERATED_FILES:
path = os.path.join(BORINGSSL_PATH, f)
os.unlink(path)
# Generate new ones.
subprocess.check_call(['python',
os.path.join(BORINGSSL_SRC_PATH, 'util',
'generate_build_files.py'),
'--embed_test_data=false',
'gn'],
cwd=BORINGSSL_PATH)
# Commit everything.
subprocess.check_call(['git', 'add', DEPS_PATH], cwd=SRC_PATH)
for (osname, arch, _, _, _) in generate_build_files.OS_ARCH_COMBOS:
path = os.path.join(BORINGSSL_PATH, osname + '-' + arch)
subprocess.check_call(['git', 'add', path], cwd=SRC_PATH)
for f in GENERATED_FILES:
path = os.path.join(BORINGSSL_PATH, f)
subprocess.check_call(['git', 'add', path], cwd=SRC_PATH)
message = """Roll src/third_party/boringssl/src %s..%s
https://boringssl.googlesource.com/boringssl/+log/%s..%s
""" % (old_head[:9], new_head[:9], old_head, new_head)
if crbug_commits:
message += 'The following commits have Chromium bugs associated:\n'
for commit in crbug_commits:
message += ' ' + FormatCommit(commit)
message += '\n'
if update_note_commits:
message += 'The following commits have update notes:\n'
for commit in update_note_commits:
message += ' ' + FormatCommit(commit)
message += '\n'
if crbugs:
message += 'Bug: %s\n' % (', '.join(str(bug) for bug in sorted(crbugs)),)
else:
message += 'Bug: none\n'
subprocess.check_call(['git', 'commit', '-m', message], cwd=SRC_PATH)
# Print update notes.
notes = subprocess.check_output(
['git', 'log', '--grep', '^Update-Note:', '-i',
'%s..%s' % (old_head, new_head)], cwd=BORINGSSL_SRC_PATH).strip()
if len(notes) > 0:
print "\x1b[1mThe following changes contain updating notes\x1b[0m:\n\n"
print notes
return 0
if __name__ == '__main__':
sys.exit(main())