Merge branch 'main' into henrymercer/controlled-switchover

.github/update-release-branch.py

@@ -13,14 +13,8 @@
 
 """
 
-# Value of the mode flag for a v1 release
-V1_MODE = 'v1-release'
-
-# Value of the mode flag for a v2 release
-V2_MODE = 'v2-release'
-
-SOURCE_BRANCH_FOR_MODE = { V1_MODE: 'releases/v2', V2_MODE: 'main' }
-TARGET_BRANCH_FOR_MODE = { V1_MODE: 'releases/v1', V2_MODE: 'releases/v2' }
+SOURCE_BRANCH = 'main'
+TARGET_BRANCH = 'releases/v2'
 
 # Name of the remote
 ORIGIN = 'origin'
@@ -32,39 +26,37 @@ def run_git(*args, allow_non_zero_exit_code=False):
   cmd = ['git', *args]
   p = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
   if not allow_non_zero_exit_code and p.returncode != 0:
-    raise Exception('Call to ' + ' '.join(cmd) + ' exited with code ' + str(p.returncode) + ' stderr:' + p.stderr.decode('ascii'))
+    raise Exception(f'Call to {" ".join(cmd)} exited with code {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 target branch
-def open_pr(
-  repo, all_commits, source_branch_short_sha, new_branch_name, source_branch, target_branch,
-  conductor, is_v2_release, labels, conflicted_files):
+def open_pr(repo, all_commits, source_branch_short_sha, new_branch_name, 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)
+    pr = get_pr_for_commit(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')
+  print(f'Found {len(pull_requests)} pull requests.')
+  print(f'Found {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 ' + source_branch_short_sha + ' into ' + target_branch)
+  body.append(f'Merging {source_branch_short_sha} into {TARGET_BRANCH}.')
 
   body.append('')
   body.append(f'Conductor for this PR is @{conductor}.')
@@ -87,50 +79,33 @@ def open_pr(
 
   body.append('')
   body.append('Please do the following:')
-  if len(conflicted_files) > 0:
-    body.append(' - [ ] Ensure `package.json` file contains the correct version.')
-    body.append(' - [ ] Add commits to this branch to resolve the merge conflicts ' +
-      'in the following files:')
-    body.extend([f'    - [ ] `{file}`' for file in conflicted_files])
-    body.append(' - [ ] Ensure another maintainer has reviewed the additional commits you added to this ' +
-      'branch to resolve the merge conflicts.')
   body.append(' - [ ] Ensure the CHANGELOG displays the correct version and date.')
   body.append(' - [ ] Ensure the CHANGELOG includes all relevant, user-facing changes since the last release.')
-  body.append(' - [ ] Check that there are not any unexpected commits being merged into the ' + target_branch + ' branch.')
+  body.append(f' - [ ] Check that there are not any unexpected commits being merged into the {TARGET_BRANCH} branch.')
   body.append(' - [ ] Ensure the docs team is aware of any documentation changes that need to be released.')
-
-  if not is_v2_release:
-    body.append(' - [ ] Remove and re-add the "Update dependencies" label to the PR to trigger just this workflow.')
-    body.append(' - [ ] Wait for the "Update dependencies" workflow to push a commit updating the dependencies.')
-    body.append(' - [ ] Mark the PR as ready for review to trigger the full set of PR checks.')
-
   body.append(' - [ ] Approve and merge this PR. Make sure `Create a merge commit` is selected rather than `Squash and merge` or `Rebase and merge`.')
+  body.append(' - [ ] Merge the mergeback PR that will automatically be created once this PR is merged.')
 
-  if is_v2_release:
-    body.append(' - [ ] Merge the mergeback PR that will automatically be created once this PR is merged.')
-    body.append(' - [ ] Merge the v1 release PR that will automatically be created once this PR is merged.')
-
-  title = 'Merge ' + source_branch + ' into ' + target_branch
+  title = f'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)
-  pr.add_to_labels(*labels)
-  print('Created PR #' + str(pr.number))
+  pr = repo.create_pull(title=title, body='\n'.join(body), head=new_branch_name, base=TARGET_BRANCH, draft=True)
+  print(f'Created PR #{pr.number}')
 
   # Assign the conductor
   pr.add_to_assignees(conductor)
-  print('Assigned PR to ' + conductor)
+  print(f'Assigned PR to {conductor}')
 
 # Gets a list of the SHAs of all commits that have happened on the source branch
 # since the last release to the target branch.
 # This will not include any commits that exist on the target branch
 # that aren't on the source branch.
-def get_commit_difference(repo, source_branch, target_branch):
+def get_commit_difference(repo):
   # 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()
+  commits = run_git('log', '--pretty=format:%H', f'{ORIGIN}/{TARGET_BRANCH}..{ORIGIN}/{SOURCE_BRANCH}').strip().split()
 
   # Convert to full-fledged commit objects
   commits = [repo.get_commit(c) for c in commits]
@@ -146,13 +121,13 @@ def is_pr_merge_commit(commit):
 def get_truncated_commit_message(commit):
   message = commit.commit.message.split('\n')[0]
   if len(message) > 60:
-    return message[:57] + '...'
+    return f'{message[:57]}...'
   else:
     return message
 
 # Converts a commit into the PR that introduced it to the source branch.
 # Returns the PR object, or None if no PR could be found.
-def get_pr_for_commit(repo, commit):
+def get_pr_for_commit(commit):
   prs = commit.get_pulls()
 
   if prs.totalCount > 0:
@@ -186,7 +161,7 @@ def update_changelog(version):
   else:
     content = EMPTY_CHANGELOG
 
-  newContent = content.replace('[UNRELEASED]', version + ' - ' + get_today_string(), 1)
+  newContent = content.replace('[UNRELEASED]', f'${version} - {get_today_string()}', 1)
 
   with open('CHANGELOG.md', 'w') as f:
     f.write(newContent)
@@ -207,16 +182,6 @@ def main():
     required=True,
     help='The nwo of the repository, for example github/codeql-action.'
   )
-  parser.add_argument(
-    '--mode',
-    type=str,
-    required=True,
-    choices=[V2_MODE, V1_MODE],
-    help=f"Which release to perform. '{V2_MODE}' uses {SOURCE_BRANCH_FOR_MODE[V2_MODE]} as the source " +
-      f"branch and {TARGET_BRANCH_FOR_MODE[V2_MODE]} as the target branch. " +
-      f"'{V1_MODE}' uses {SOURCE_BRANCH_FOR_MODE[V1_MODE]} as the source branch and " +
-      f"{TARGET_BRANCH_FOR_MODE[V1_MODE]} as the target branch."
-  )
   parser.add_argument(
     '--conductor',
     type=str,
@@ -226,110 +191,46 @@ def main():
 
   args = parser.parse_args()
 
-  source_branch = SOURCE_BRANCH_FOR_MODE[args.mode]
-  target_branch = TARGET_BRANCH_FOR_MODE[args.mode]
-
   repo = Github(args.github_token).get_repo(args.repository_nwo)
   version = get_current_version()
 
-  if args.mode == V1_MODE:
-    # 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 ' + source_branch + ' and ' + target_branch)
-  source_branch_short_sha = run_git('rev-parse', '--short', ORIGIN + '/' + source_branch).strip()
-  print('Current head of ' + source_branch + ' is ' + source_branch_short_sha)
+  print(f'Considering difference between {SOURCE_BRANCH} and {TARGET_BRANCH}...')
+  source_branch_short_sha = run_git('rev-parse', '--short', f'{ORIGIN}/{SOURCE_BRANCH}').strip()
+  print(f'Current head of {SOURCE_BRANCH} is {source_branch_short_sha}.')
 
   # See if there are any commits to merge in
-  commits = get_commit_difference(repo=repo, source_branch=source_branch, target_branch=target_branch)
+  commits = get_commit_difference(repo=repo)
   if len(commits) == 0:
-    print('No commits to merge from ' + source_branch + ' to ' + target_branch)
+    print(f'No commits to merge from {SOURCE_BRANCH} to {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 + '-' + source_branch_short_sha
-  print('Branch name is ' + new_branch_name)
+  new_branch_name = f'update-v{version}-{source_branch_short_sha}'
+  print(f'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.')
+    print(f'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)
-
-  # The process of creating the v1 release can run into merge conflicts. We commit the unresolved
-  # conflicts so a maintainer can easily resolve them (vs erroring and requiring maintainers to
-  # reconstruct the release manually)
-  conflicted_files = []
-
-  if args.mode == V1_MODE:
-    # If we're performing a backport, start from the target branch
-    print(f'Creating {new_branch_name} from the {ORIGIN}/{target_branch} branch')
-    run_git('checkout', '-b', new_branch_name, f'{ORIGIN}/{target_branch}')
-
-    # Revert the commit that we made as part of the last release that updated the version number and
-    # changelog to refer to 1.x.x variants. This avoids merge conflicts in the changelog and
-    # package.json files when we merge in the v2 branch.
-    # This commit will not exist the first time we release the v1 branch from the v2 branch, so we
-    # use `git log --grep` to conditionally revert the commit.
-    print('Reverting the 1.x.x version number and changelog updates from the last release to avoid conflicts')
-    v1_update_commits = run_git('log', '--grep', '^Update version and changelog for v', '--format=%H').split()
-
-    if len(v1_update_commits) > 0:
-      print(f'  Reverting {v1_update_commits[0]}')
-      # Only revert the newest commit as older ones will already have been reverted in previous
-      # releases.
-      run_git('revert', v1_update_commits[0], '--no-edit')
-
-      # Also revert the "Update checked-in dependencies" commit created by Actions.
-      update_dependencies_commit = run_git('log', '--grep', '^Update checked-in dependencies', '--format=%H').split()[0]
-      print(f'  Reverting {update_dependencies_commit}')
-      run_git('revert', update_dependencies_commit, '--no-edit')
-
-    else:
-      print('  Nothing to revert.')
-
-    print(f'Merging {ORIGIN}/{source_branch} into the release prep branch')
-    # Commit any conflicts (see the comment for `conflicted_files`)
-    run_git('merge', f'{ORIGIN}/{source_branch}', allow_non_zero_exit_code=True)
-    conflicted_files = run_git('diff', '--name-only', '--diff-filter', 'U').splitlines()
-    if len(conflicted_files) > 0:
-      run_git('add', '.')
-      run_git('commit', '--no-edit')
-
-    # Migrate the package version number from a v2 version number to a v1 version number
-    print(f'Setting version number to {version}')
-    subprocess.check_output(['npm', 'version', version, '--no-git-tag-version'])
-    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.check_output(['sed', '-i', 's/^## 2\./## 1./g', 'CHANGELOG.md'])
-
-    # Remove changelog notes from v2 that don't apply to v1
-    subprocess.check_output(['sed', '-i', '/^- \[v2+ only\]/d', 'CHANGELOG.md'])
-
-    # Amend the commit generated by `npm version` to update the CHANGELOG
-    run_git('add', 'CHANGELOG.md')
-    run_git('commit', '-m', f'Update version and changelog for v{version}')
-  else:
-    # If we're performing a standard release, there won't be any new commits on the target branch,
-    # as these will have already been merged back into the source branch. Therefore we can just
-    # start from the source branch.
-    run_git('checkout', '-b', new_branch_name, f'{ORIGIN}/{source_branch}')
+  print(f'Creating branch {new_branch_name}.')
+
+  # If we're performing a standard release, there won't be any new commits on the target branch,
+  # as these will have already been merged back into the source branch. Therefore we can just
+  # start from the source branch.
+  run_git('checkout', '-b', new_branch_name, f'{ORIGIN}/{SOURCE_BRANCH}')
 
-    print('Updating changelog')
-    update_changelog(version)
+  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}')
+  # 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)
 
@@ -339,12 +240,7 @@ def main():
     commits,
     source_branch_short_sha,
     new_branch_name,
-    source_branch=source_branch,
-    target_branch=target_branch,
     conductor=args.conductor,
-    is_v2_release=args.mode == V2_MODE,
-    labels=['Update dependencies'] if args.mode == V1_MODE else [],
-    conflicted_files=conflicted_files
   )
 
 if __name__ == '__main__':