Files
codeql-action/.github/update-release-branch.py

279 lines
10 KiB
Python

import argparse
import datetime
from github import Github
import json
import os
import subprocess
EMPTY_CHANGELOG = """# CodeQL Action and CodeQL Runner Changelog
## [UNRELEASED]
No user facing changes.
"""
# Name of the remote
ORIGIN = 'origin'
# Runs git with the given args and returns the stdout.
# Raises an error if git does not exit successfully.
def run_git(*args):
cmd = ['git', *args]
p = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
if (p.returncode != 0):
raise Exception('Call to ' + ' '.join(cmd) + ' exited with code ' + str(p.returncode) + ' stderr:' + p.stderr.decode('ascii'))
return p.stdout.decode('ascii')
# Returns true if the given branch exists on the origin remote
def branch_exists_on_remote(branch_name):
return run_git('ls-remote', '--heads', ORIGIN, branch_name).strip() != ''
# Opens a PR from the given branch to the release branch
def open_pr(repo, all_commits, short_main_sha, new_branch_name, source_branch, target_branch, conductor):
# Sort the commits into the pull requests that introduced them,
# and any commits that don't have a pull request
pull_requests = []
commits_without_pull_requests = []
for commit in all_commits:
pr = get_pr_for_commit(repo, commit)
if pr is None:
commits_without_pull_requests.append(commit)
elif not any(p for p in pull_requests if p.number == pr.number):
pull_requests.append(pr)
print('Found ' + str(len(pull_requests)) + ' pull requests')
print('Found ' + str(len(commits_without_pull_requests)) + ' commits not in a pull request')
# Sort PRs and commits by age
pull_requests = sorted(pull_requests, key=lambda pr: pr.number)
commits_without_pull_requests = sorted(commits_without_pull_requests, key=lambda c: c.commit.author.date)
# Start constructing the body text
body = []
body.append('Merging ' + short_main_sha + ' into ' + target_branch)
body.append('')
body.append('Conductor for this PR is @' + conductor)
# List all PRs merged
if len(pull_requests) > 0:
body.append('')
body.append('Contains the following pull requests:')
for pr in pull_requests:
merger = get_merger_of_pr(repo, pr)
body.append('- #' + str(pr.number) + ' - ' + pr.title +' (@' + merger + ')')
# List all commits not part of a PR
if len(commits_without_pull_requests) > 0:
body.append('')
body.append('Contains the following commits not from a pull request:')
for commit in commits_without_pull_requests:
author_description = ' (@' + commit.author.login + ')' if commit.author is not None else ''
body.append('- ' + commit.sha + ' - ' + get_truncated_commit_message(commit) + author_description)
body.append('')
body.append('Please review the following:')
body.append(' - [ ] The CHANGELOG displays the correct version and date.')
body.append(' - [ ] The CHANGELOG includes all relevant, user-facing changes since the last release.')
body.append(' - [ ] There are no unexpected commits being merged into the ' + target_branch + ' branch.')
body.append(' - [ ] The docs team is aware of any documentation changes that need to be released.')
body.append(' - [ ] The mergeback PR is merged back into ' + source_branch + ' after this PR is merged.')
title = 'Merge ' + source_branch + ' into ' + target_branch
# Create the pull request
# PR checks won't be triggered on PRs created by Actions. Therefore mark the PR as draft so that
# a maintainer can take the PR out of draft, thereby triggering the PR checks.
pr = repo.create_pull(title=title, body='\n'.join(body), head=new_branch_name, base=target_branch, draft=True)
print('Created PR #' + str(pr.number))
# Assign the conductor
pr.add_to_assignees(conductor)
print('Assigned PR to ' + conductor)
# Gets a list of the SHAs of all commits that have happened on main
# since the release branched off.
# This will not include any commits that exist on the release branch
# that aren't on main.
def get_commit_difference(repo, source_branch, target_branch):
# Passing split nothing means that the empty string splits to nothing: compare `''.split() == []`
# to `''.split('\n') == ['']`.
commits = run_git('log', '--pretty=format:%H', ORIGIN + '/' + target_branch + '..' + ORIGIN + '/' + source_branch).strip().split()
# Convert to full-fledged commit objects
commits = [repo.get_commit(c) for c in commits]
# Filter out merge commits for PRs
return list(filter(lambda c: not is_pr_merge_commit(c), commits))
# Is the given commit the automatic merge commit from when merging a PR
def is_pr_merge_commit(commit):
return commit.committer is not None and commit.committer.login == 'web-flow' and len(commit.parents) > 1
# Gets a copy of the commit message that should display nicely
def get_truncated_commit_message(commit):
message = commit.commit.message.split('\n')[0]
if len(message) > 60:
return message[:57] + '...'
else:
return message
# Converts a commit into the PR that introduced it to the main branch.
# Returns the PR object, or None if no PR could be found.
def get_pr_for_commit(repo, commit):
prs = commit.get_pulls()
if prs.totalCount > 0:
# In the case that there are multiple PRs, return the earliest one
prs = list(prs)
sorted_prs = sorted(prs, key=lambda pr: int(pr.number))
return sorted_prs[0]
else:
return None
# Get the person who merged the pull request.
# For most cases this will be the same as the author, but for PRs opened
# by external contributors getting the merger will get us the GitHub
# employee who reviewed and merged the PR.
def get_merger_of_pr(repo, pr):
return repo.get_commit(pr.merge_commit_sha).author.login
def get_current_version():
with open('package.json', 'r') as f:
return json.load(f)['version']
def get_today_string():
today = datetime.datetime.today()
return '{:%d %b %Y}'.format(today)
def update_changelog(version):
if (os.path.exists('CHANGELOG.md')):
content = ''
with open('CHANGELOG.md', 'r') as f:
content = f.read()
else:
content = EMPTY_CHANGELOG
newContent = content.replace('[UNRELEASED]', version + ' - ' + get_today_string(), 1)
with open('CHANGELOG.md', 'w') as f:
f.write(newContent)
def main():
parser = argparse.ArgumentParser('update-release-branch.py')
parser.add_argument(
'--github-token',
type=str,
required=True,
help='GitHub token, typically from GitHub Actions.'
)
parser.add_argument(
'--repository-nwo',
type=str,
required=True,
help='The nwo of the repository, for example github/codeql-action.'
)
parser.add_argument(
'--source-branch',
type=str,
required=True,
help='The branch being merged from, typically "main" for a v2 release or "v2" for a v1 release.'
)
parser.add_argument(
'--target-branch',
type=str,
required=True,
help='The branch being merged into, typically "v2" for a v2 release or "v1" for a v1 release.'
)
parser.add_argument(
'--conductor',
type=str,
required=True,
help='The GitHub handle of the person who is conducting the release process.'
)
parser.add_argument(
'--perform-v2-to-v1-backport',
action='store_true',
help='Pass this flag if this release is a backport from v2 to v1.'
)
args = parser.parse_args()
repo = Github(args.github_token).get_repo(args.repository_nwo)
version = get_current_version()
if args.perform_v2_to_v1_backport:
# Change the version number to a v1 equivalent
version = get_current_version()
version = f'1{version[1:]}'
# Print what we intend to go
print('Considering difference between ' + args.source_branch + ' and ' + args.target_branch)
short_main_sha = run_git('rev-parse', '--short', ORIGIN + '/' + args.source_branch).strip()
print('Current head of ' + args.source_branch + ' is ' + short_main_sha)
# See if there are any commits to merge in
commits = get_commit_difference(repo=repo, source_branch=args.source_branch, target_branch=args.target_branch)
if len(commits) == 0:
print('No commits to merge from ' + args.source_branch + ' to ' + args.target_branch)
return
# The branch name is based off of the name of branch being merged into
# and the SHA of the branch being merged from. Thus if the branch already
# exists we can assume we don't need to recreate it.
new_branch_name = 'update-v' + version + '-' + short_main_sha
print('Branch name is ' + new_branch_name)
# Check if the branch already exists. If so we can abort as this script
# has already run on this combination of branches.
if branch_exists_on_remote(new_branch_name):
print('Branch ' + new_branch_name + ' already exists. Nothing to do.')
return
# Create the new branch and push it to the remote
print('Creating branch ' + new_branch_name)
run_git('checkout', '-b', new_branch_name, ORIGIN + '/' + args.source_branch)
if args.perform_v2_to_v1_backport:
# Migrate the package version number from a v2 version number to a v1 version number
print(f'Setting version number to {version}')
subprocess.run(['npm', 'version', version, '--no-git-tag-version'])
run_git('reset', 'HEAD~1')
run_git('add', 'package.json', 'package-lock.json')
# Migrate the changelog notes from v2 version numbers to v1 version numbers
print('Migrating changelog notes from v2 to v1')
subprocess.run(['sed', '-i', 's/## 2./## 1./g', 'CHANGELOG.md'])
# Amend the commit generated by `npm version` to update the CHANGELOG
run_git('add', 'CHANGELOG.md')
run_git('commit', '--amend', '-m', f'Update version and changelog for v{version}')
else:
# We don't need to do this for a v1 release, since the changelog has already been updated in the v2 branch.
print('Updating changelog')
update_changelog(version)
# Create a commit that updates the CHANGELOG
run_git('add', 'CHANGELOG.md')
run_git('commit', '-m', f'Update changelog for v{version}')
run_git('push', ORIGIN, new_branch_name)
# Open a PR to update the branch
open_pr(
repo,
commits,
short_main_sha,
new_branch_name,
source_branch=args.source_branch,
target_branch=args.target_branch,
conductor=args.conductor
)
if __name__ == '__main__':
main()