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from __future__ import annotations import json import logging import os import shlex from typing import Any from typing import Sequence import pre_commit.constants as C from pre_commit.all_languages import languages from pre_commit.clientlib import load_manifest from pre_commit.clientlib import LOCAL from pre_commit.clientlib import META from pre_commit.clientlib import parse_version from pre_commit.hook import Hook from pre_commit.lang_base import environment_dir from pre_commit.prefix import Prefix from pre_commit.store import Store from pre_commit.util import clean_path_on_failure from pre_commit.util import rmtree logger = logging.getLogger('pre_commit') def _state_filename_v1(venv: str) -> str: return os.path.join(venv, '.install_state_v1') def _state_filename_v2(venv: str) -> str: return os.path.join(venv, '.install_state_v2') def _state(additional_deps: Sequence[str]) -> object: return {'additional_dependencies': additional_deps} def _read_state(venv: str) -> object | None: filename = _state_filename_v1(venv) if not os.path.exists(filename): return None else: with open(filename) as f: return json.load(f) def _hook_installed(hook: Hook) -> bool: lang = languages[hook.language] if lang.ENVIRONMENT_DIR is None: return True venv = environment_dir( hook.prefix, lang.ENVIRONMENT_DIR, hook.language_version, ) return ( ( os.path.exists(_state_filename_v2(venv)) or _read_state(venv) == _state(hook.additional_dependencies) ) and not lang.health_check(hook.prefix, hook.language_version) ) def _hook_install(hook: Hook) -> None: logger.info(f'Installing environment for {hook.src}.') logger.info('Once installed this environment will be reused.') logger.info('This may take a few minutes...') if hook.language == 'python_venv': logger.warning( f'`repo: {hook.src}` uses deprecated `language: python_venv`. ' f'This is an alias for `language: python`. ' f'Often `pre-commit autoupdate --repo {shlex.quote(hook.src)}` ' f'will fix this.', ) lang = languages[hook.language] assert lang.ENVIRONMENT_DIR is not None venv = environment_dir( hook.prefix, lang.ENVIRONMENT_DIR, hook.language_version, ) # There's potentially incomplete cleanup from previous runs # Clean it up! if os.path.exists(venv): rmtree(venv) with clean_path_on_failure(venv): lang.install_environment( hook.prefix, hook.language_version, hook.additional_dependencies, ) health_error = lang.health_check(hook.prefix, hook.language_version) if health_error: raise AssertionError( f'BUG: expected environment for {hook.language} to be healthy ' f'immediately after install, please open an issue describing ' f'your environment\n\n' f'more info:\n\n{health_error}', ) # TODO: remove v1 state writing, no longer needed after pre-commit 3.0 # Write our state to indicate we're installed state_filename = _state_filename_v1(venv) staging = f'{state_filename}staging' with open(staging, 'w') as state_file: state_file.write(json.dumps(_state(hook.additional_dependencies))) # Move the file into place atomically to indicate we've installed os.replace(staging, state_filename) open(_state_filename_v2(venv), 'a+').close() def _hook( *hook_dicts: dict[str, Any], root_config: dict[str, Any], ) -> dict[str, Any]: ret, rest = dict(hook_dicts[0]), hook_dicts[1:] for dct in rest: ret.update(dct) version = ret['minimum_pre_commit_version'] if parse_version(version) > parse_version(C.VERSION): logger.error( f'The hook `{ret["id"]}` requires pre-commit version {version} ' f'but version {C.VERSION} is installed. ' f'Perhaps run `pip install --upgrade pre-commit`.', ) exit(1) lang = ret['language'] if ret['language_version'] == C.DEFAULT: ret['language_version'] = root_config['default_language_version'][lang] if ret['language_version'] == C.DEFAULT: ret['language_version'] = languages[lang].get_default_version() if not ret['stages']: ret['stages'] = root_config['default_stages'] if languages[lang].ENVIRONMENT_DIR is None: if ret['language_version'] != C.DEFAULT: logger.error( f'The hook `{ret["id"]}` specifies `language_version` but is ' f'using language `{lang}` which does not install an ' f'environment. ' f'Perhaps you meant to use a specific language?', ) exit(1) if ret['additional_dependencies']: logger.error( f'The hook `{ret["id"]}` specifies `additional_dependencies` ' f'but is using language `{lang}` which does not install an ' f'environment. ' f'Perhaps you meant to use a specific language?', ) exit(1) return ret def _non_cloned_repository_hooks( repo_config: dict[str, Any], store: Store, root_config: dict[str, Any], ) -> tuple[Hook, ...]: def _prefix(language_name: str, deps: Sequence[str]) -> Prefix: language = languages[language_name] # pygrep / script / system / docker_image do not have # environments so they work out of the current directory if language.ENVIRONMENT_DIR is None: return Prefix(os.getcwd()) else: return Prefix(store.make_local(deps)) return tuple( Hook.create( repo_config['repo'], _prefix(hook['language'], hook['additional_dependencies']), _hook(hook, root_config=root_config), ) for hook in repo_config['hooks'] ) def _cloned_repository_hooks( repo_config: dict[str, Any], store: Store, root_config: dict[str, Any], ) -> tuple[Hook, ...]: repo, rev = repo_config['repo'], repo_config['rev'] manifest_path = os.path.join(store.clone(repo, rev), C.MANIFEST_FILE) by_id = {hook['id']: hook for hook in load_manifest(manifest_path)} for hook in repo_config['hooks']: if hook['id'] not in by_id: logger.error( f'`{hook["id"]}` is not present in repository {repo}. ' f'Typo? Perhaps it is introduced in a newer version? ' f'Often `pre-commit autoupdate` fixes this.', ) exit(1) hook_dcts = [ _hook(by_id[hook['id']], hook, root_config=root_config) for hook in repo_config['hooks'] ] return tuple( Hook.create( repo_config['repo'], Prefix(store.clone(repo, rev, hook['additional_dependencies'])), hook, ) for hook in hook_dcts ) def _repository_hooks( repo_config: dict[str, Any], store: Store, root_config: dict[str, Any], ) -> tuple[Hook, ...]: if repo_config['repo'] in {LOCAL, META}: return _non_cloned_repository_hooks(repo_config, store, root_config) else: return _cloned_repository_hooks(repo_config, store, root_config) def install_hook_envs(hooks: Sequence[Hook], store: Store) -> None: def _need_installed() -> list[Hook]: seen: set[tuple[Prefix, str, str, tuple[str, ...]]] = set() ret = [] for hook in hooks: if hook.install_key not in seen and not _hook_installed(hook): ret.append(hook) seen.add(hook.install_key) return ret if not _need_installed(): return with store.exclusive_lock(): # Another process may have already completed this work for hook in _need_installed(): _hook_install(hook) def all_hooks(root_config: dict[str, Any], store: Store) -> tuple[Hook, ...]: return tuple( hook for repo in root_config['repos'] for hook in _repository_hooks(repo, store, root_config) )
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