119 lines
3.3 KiB
Python
119 lines
3.3 KiB
Python
# Copyright 2020 Christophe Bedard
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Get ros2_tracing branch name from the last commit or a default value."""
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import argparse
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import os
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import sys
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from typing import List
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from typing import Optional
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ENV_DEFAULT_BRANCH = 'ROS2TRACING_BRANCH'
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ENV_COMMIT_DESCRIPTION = 'CI_COMMIT_DESCRIPTION'
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ROS2_TRACING_BRANCH_TRAILER_TOKEN = 'Ros2-tracing-branch'
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def add_args(parser: argparse.ArgumentParser) -> None:
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parser.add_argument(
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'-c', '--check',
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action='store_true',
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default=False,
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help='only process and print resulting branch in a verbose way',
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)
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def parse_args() -> argparse.Namespace:
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parser = argparse.ArgumentParser(
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description='Extract name of the (optional) ros2_tracing branch to be used for CI',
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)
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add_args(parser)
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return parser.parse_args()
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def get_trailer_value(
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trailer_name: str,
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commit_description: str,
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check: bool = False,
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) -> Optional[str]:
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# Get trailer line
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trailer_lines = [
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line for line in commit_description.split('\n') if trailer_name in line
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]
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if len(trailer_lines) == 0:
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if check:
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print(f'could not find any trailer lines for: \'{trailer_name}\'')
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return None
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elif len(trailer_lines) > 1:
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if check:
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print(
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f'found more than one trailer lines for: \'{trailer_name}\' '
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'(will use the first one)'
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)
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# Extract value
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line = trailer_lines[0]
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if not (trailer_name + ':') in line:
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if check:
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print(f'could not find: \'{trailer_name}:\'')
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return None
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key_value = line.split(':')
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if len(key_value) != 2:
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if check:
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print(f'misformed trailer line: \'{key_value}\'')
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return None
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value = key_value[1].strip()
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if len(value) == 0:
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if check:
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print(f'misformed trailer value: \'{value}\'')
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return None
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return value
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def main() -> int:
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args = parse_args()
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check = args.check
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# Get default value
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default_branch = os.environ.get(ENV_DEFAULT_BRANCH, None)
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if default_branch is None:
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if check:
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print(f'could not get environment variable: \'{ENV_DEFAULT_BRANCH}\'')
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return 1
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# Get commit description
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commit_description = os.environ.get(ENV_COMMIT_DESCRIPTION, None)
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if commit_description is None:
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if check:
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print(f'could not get environment variable: \'{ENV_COMMIT_DESCRIPTION}\'')
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return None
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# Get value
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branch = get_trailer_value(
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ROS2_TRACING_BRANCH_TRAILER_TOKEN,
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commit_description,
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check,
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)
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# Print value
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prefix = 'ros2_tracing branch: ' if check else ''
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print(prefix + (branch or default_branch))
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return 0
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if __name__ == '__main__':
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sys.exit(main())
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