def prepare_release(release_type):
"""Bump the version, update the changelog and open a PR."""
remote = 'origin'
if any_uncommitted_changes():
raise CommandError(
'There are uncommitted changes. Please commit, stash or delete them and try again.',
)
subprocess.run(['git', 'fetch'], check=True)
subprocess.run(['git', 'checkout', f'{remote}/develop'],
check=True,
capture_output=True)
new_version = get_next_version(release_type)
branch = f'changelog/{new_version}'
pr_title = f'Prepare for release {new_version}'
pr_body = f'This bumps the version and adds the changelog for version {new_version}.'
commit_message = f"""{pr_title}\n\n{pr_body}"""
if local_branch_exists(branch):
raise CommandError(
f'Branch {branch} already exists locally. Please delete it and try again.',
)
if remote_branch_exists(branch):
raise CommandError(
f'Branch {branch} already exists remotely. Please delete it on GitHub and try again.',
)
if not list_news_fragments():
raise CommandError('There are no news fragments.')
subprocess.run(['git', 'checkout', '-b', branch, f'{remote}/develop'],
check=True)
subprocess.run(['towncrier', '--version',
str(new_version), '--yes'],
check=True)
remaining_news_fragment_paths = list_news_fragments()
if remaining_news_fragment_paths:
joined_paths = '\n'.join(
str(path) for path in remaining_news_fragment_paths)
raise CommandError(
'These news fragments were left behind:\n\n'
f'{joined_paths}\n\n'
'They may be misnamed. Please investigate.', )
set_current_version(new_version)
subprocess.run(['git', 'add', VERSION_FILE_PATH], check=True)
subprocess.run(['git', 'commit', '-m', commit_message], check=True)
subprocess.run(['git', 'push', '--set-upstream', remote, branch],
check=True)
escaped_branch_name = quote(branch)
params = {
'expand': '1',
'title': pr_title,
'body': pr_body,
}
webbrowser.open(
f'{BASE_GITHUB_REPO_URL}/compare/{escaped_branch_name}?{urlencode(params)}'
)
return branch
def create_release_branch():
"""Create and push a release branch."""
remote = 'origin'
if any_uncommitted_changes():
raise CommandError(
'There are uncommitted changes. Please commit, stash or delete them and try again.',
)
subprocess.run(['git', 'fetch'], check=True)
subprocess.run(['git', 'checkout', f'{remote}/develop'],
check=True,
capture_output=True)
version = get_current_version()
branch = f'release/{version}'
tag = f'v{version}'
if remote_tag_exists(tag):
raise CommandError(
f'A remote tag {tag} currently exists. It looks like version {version} has '
f'already been released.', )
news_fragment_paths = list_news_fragments()
if news_fragment_paths:
joined_paths = '\n'.join(str(path) for path in news_fragment_paths)
raise CommandError(
'These are news fragments on origin/develop:\n\n'
f'{joined_paths}\n\n'
'Is the changelog up to date?', )
if local_branch_exists(branch):
raise CommandError(
f'Branch {branch} already exists locally. Please delete it and try again.',
)
if remote_branch_exists(branch):
raise CommandError(
f'Branch {branch} already exists remotely. Please delete it on GitHub and try again.',
)
subprocess.run(['git', 'checkout', '-b', branch, f'{remote}/develop'],
check=True)
subprocess.run(['git', 'push', '--set-upstream', remote, branch],
check=True)
params = {
'expand':
'1',
'title':
f'Release {version}',
'body':
PR_BODY_TEMPLATE.format(version=version,
release_guide_url=RELEASE_GUIDE_URL),
}
encoded_params = urlencode(params)
escaped_branch_name = quote(branch)
webbrowser.open(
f'{GITHUB_BASE_REPO_URL}/compare/master...{escaped_branch_name}?{encoded_params}',
)
return branch
def test_local_branch_exists(side_effect, expected_result,
mock_subprocess_run):
"""Test that local_branch_exists() returns the expected value in various scenarios."""
mock_subprocess_run.side_effect = side_effect
assert local_branch_exists('test-branch') == expected_result