mirror of
https://github.com/pre-commit/pre-commit.git
synced 2026-01-13 12:30:08 -06:00
98 lines
2.9 KiB
Python
98 lines
2.9 KiB
Python
from __future__ import unicode_literals
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import io
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import logging
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import os
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import os.path
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import tempfile
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from asottile.cached_property import cached_property
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from plumbum import local
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from pre_commit.prefixed_command_runner import PrefixedCommandRunner
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from pre_commit.util import clean_path_on_failure
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logger = logging.getLogger('pre_commit')
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def _get_default_directory():
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"""Returns the default directory for the Store. This is intentionally
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underscored to indicate that `Store.get_default_directory` is the intended
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way to get this information. This is also done so
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`Store.get_default_directory` can be mocked in tests and
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`_get_default_directory` can be tested.
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"""
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return os.path.join(os.environ['HOME'], '.pre-commit')
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class Store(object):
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get_default_directory = staticmethod(_get_default_directory)
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class RepoPathGetter(object):
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def __init__(self, repo, sha, store):
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self._repo = repo
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self._sha = sha
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self._store = store
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@cached_property
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def repo_path(self):
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return self._store.clone(self._repo, self._sha)
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def __init__(self, directory=None):
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if directory is None:
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directory = self.get_default_directory()
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self.directory = directory
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self.__created = False
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def _write_readme(self):
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with io.open(os.path.join(self.directory, 'README'), 'w') as readme:
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readme.write(
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'This directory is maintained by the pre-commit project.\n'
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'Learn more: https://github.com/pre-commit/pre-commit\n'
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)
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def _create(self):
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if os.path.exists(self.directory):
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return
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os.makedirs(self.directory)
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self._write_readme()
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def require_created(self):
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"""Require the pre-commit file store to be created."""
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if self.__created:
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return
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self._create()
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self.__created = True
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def clone(self, url, sha):
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"""Clone the given url and checkout the specific sha."""
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self.require_created()
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# Check if we already exist
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sha_path = os.path.join(self.directory, sha)
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if os.path.exists(sha_path):
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return os.readlink(sha_path)
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logger.info('Installing environment for {0}.'.format(url))
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logger.info('Once installed this environment will be reused.')
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logger.info('This may take a few minutes...')
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dir = tempfile.mkdtemp(prefix='repo', dir=self.directory)
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with clean_path_on_failure(dir):
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local['git']('clone', '--no-checkout', url, dir)
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with local.cwd(dir):
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local['git']('checkout', sha)
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# Make a symlink from sha->repo
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os.symlink(dir, sha_path)
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return dir
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def get_repo_path_getter(self, repo, sha):
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return self.RepoPathGetter(repo, sha, self)
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@cached_property
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def cmd_runner(self):
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return PrefixedCommandRunner(self.directory)
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