66 lines
1.8 KiB
Python
66 lines
1.8 KiB
Python
from __future__ import annotations
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import re
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import textwrap
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import cfgv
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import yaml
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from pre_commit.clientlib import InvalidConfigError
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from pre_commit.yaml import yaml_load
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def _is_header_line(line: str) -> bool:
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return line.startswith(('#', '---')) or not line.strip()
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def _migrate_map(contents: str) -> str:
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if isinstance(yaml_load(contents), list):
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# Find the first non-header line
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lines = contents.splitlines(True)
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i = 0
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# Only loop on non empty configuration file
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while i < len(lines) and _is_header_line(lines[i]):
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i += 1
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header = ''.join(lines[:i])
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rest = ''.join(lines[i:])
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# If they are using the "default" flow style of yaml, this operation
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# will yield a valid configuration
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try:
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trial_contents = f'{header}repos:\n{rest}'
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yaml_load(trial_contents)
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contents = trial_contents
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except yaml.YAMLError:
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contents = f'{header}repos:\n{textwrap.indent(rest, " " * 4)}'
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return contents
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def _migrate_sha_to_rev(contents: str) -> str:
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return re.sub(r'(\n\s+)sha:', r'\1rev:', contents)
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def migrate_config(config_file: str, quiet: bool = False) -> int:
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with open(config_file) as f:
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orig_contents = contents = f.read()
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with cfgv.reraise_as(InvalidConfigError):
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with cfgv.validate_context(f'File {config_file}'):
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try:
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yaml_load(orig_contents)
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except Exception as e:
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raise cfgv.ValidationError(str(e))
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contents = _migrate_map(contents)
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contents = _migrate_sha_to_rev(contents)
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if contents != orig_contents:
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with open(config_file, 'w') as f:
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f.write(contents)
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print('Configuration has been migrated.')
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elif not quiet:
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print('Configuration is already migrated.')
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return 0
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