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python3.8
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pre_commit
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languages
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from __future__ import annotations import contextlib import os.path from typing import Generator from typing import Sequence from pre_commit import lang_base from pre_commit.envcontext import envcontext from pre_commit.envcontext import PatchesT from pre_commit.envcontext import Var from pre_commit.errors import FatalError from pre_commit.parse_shebang import find_executable from pre_commit.prefix import Prefix ENVIRONMENT_DIR = 'coursier' get_default_version = lang_base.basic_get_default_version health_check = lang_base.basic_health_check run_hook = lang_base.basic_run_hook def install_environment( prefix: Prefix, version: str, additional_dependencies: Sequence[str], ) -> None: lang_base.assert_version_default('coursier', version) # Support both possible executable names (either "cs" or "coursier") cs = find_executable('cs') or find_executable('coursier') if cs is None: raise AssertionError( 'pre-commit requires system-installed "cs" or "coursier" ' 'executables in the application search path', ) envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version) def _install(*opts: str) -> None: assert cs is not None lang_base.setup_cmd(prefix, (cs, 'fetch', *opts)) lang_base.setup_cmd(prefix, (cs, 'install', '--dir', envdir, *opts)) with in_env(prefix, version): channel = prefix.path('.pre-commit-channel') if os.path.isdir(channel): for app_descriptor in os.listdir(channel): _, app_file = os.path.split(app_descriptor) app, _ = os.path.splitext(app_file) _install( '--default-channels=false', '--channel', channel, app, ) elif not additional_dependencies: raise FatalError( 'expected .pre-commit-channel dir or additional_dependencies', ) if additional_dependencies: _install(*additional_dependencies) def get_env_patch(target_dir: str) -> PatchesT: return ( ('PATH', (target_dir, os.pathsep, Var('PATH'))), ('COURSIER_CACHE', os.path.join(target_dir, '.cs-cache')), ) @contextlib.contextmanager def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]: envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version) with envcontext(get_env_patch(envdir)): yield
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