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Filename :
golang.py
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from __future__ import annotations import contextlib import functools import json import os.path import platform import shutil import sys import tarfile import tempfile import urllib.error import urllib.request import zipfile from typing import ContextManager from typing import Generator from typing import IO from typing import Protocol from typing import Sequence import pre_commit.constants as C 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.prefix import Prefix from pre_commit.util import cmd_output from pre_commit.util import rmtree ENVIRONMENT_DIR = 'golangenv' health_check = lang_base.basic_health_check run_hook = lang_base.basic_run_hook _ARCH_ALIASES = { 'x86_64': 'amd64', 'i386': '386', 'aarch64': 'arm64', 'armv8': 'arm64', 'armv7l': 'armv6l', } _ARCH = platform.machine().lower() _ARCH = _ARCH_ALIASES.get(_ARCH, _ARCH) class ExtractAll(Protocol): def extractall(self, path: str) -> None: ... if sys.platform == 'win32': # pragma: win32 cover _EXT = 'zip' def _open_archive(bio: IO[bytes]) -> ContextManager[ExtractAll]: return zipfile.ZipFile(bio) else: # pragma: win32 no cover _EXT = 'tar.gz' def _open_archive(bio: IO[bytes]) -> ContextManager[ExtractAll]: return tarfile.open(fileobj=bio) @functools.lru_cache(maxsize=1) def get_default_version() -> str: if lang_base.exe_exists('go'): return 'system' else: return C.DEFAULT def get_env_patch(venv: str, version: str) -> PatchesT: if version == 'system': return ( ('PATH', (os.path.join(venv, 'bin'), os.pathsep, Var('PATH'))), ) return ( ('GOROOT', os.path.join(venv, '.go')), ( 'PATH', ( os.path.join(venv, 'bin'), os.pathsep, os.path.join(venv, '.go', 'bin'), os.pathsep, Var('PATH'), ), ), ) @functools.lru_cache def _infer_go_version(version: str) -> str: if version != C.DEFAULT: return version resp = urllib.request.urlopen('https://go.dev/dl/?mode=json') # TODO: 3.9+ .removeprefix('go') return json.load(resp)[0]['version'][2:] def _get_url(version: str) -> str: os_name = platform.system().lower() version = _infer_go_version(version) return f'https://dl.google.com/go/go{version}.{os_name}-{_ARCH}.{_EXT}' def _install_go(version: str, dest: str) -> None: try: resp = urllib.request.urlopen(_get_url(version)) except urllib.error.HTTPError as e: # pragma: no cover if e.code == 404: raise ValueError( f'Could not find a version matching your system requirements ' f'(os={platform.system().lower()}; arch={_ARCH})', ) from e else: raise else: with tempfile.TemporaryFile() as f: shutil.copyfileobj(resp, f) f.seek(0) with _open_archive(f) as archive: archive.extractall(dest) shutil.move(os.path.join(dest, 'go'), os.path.join(dest, '.go')) @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, version)): yield def install_environment( prefix: Prefix, version: str, additional_dependencies: Sequence[str], ) -> None: env_dir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version) if version != 'system': _install_go(version, env_dir) if sys.platform == 'cygwin': # pragma: no cover gopath = cmd_output('cygpath', '-w', env_dir)[1].strip() else: gopath = env_dir env = dict(os.environ, GOPATH=gopath) env.pop('GOBIN', None) if version != 'system': env['GOROOT'] = os.path.join(env_dir, '.go') env['PATH'] = os.pathsep.join(( os.path.join(env_dir, '.go', 'bin'), os.environ['PATH'], )) lang_base.setup_cmd(prefix, ('go', 'install', './...'), env=env) for dependency in additional_dependencies: lang_base.setup_cmd(prefix, ('go', 'install', dependency), env=env) # save some disk space -- we don't need this after installation pkgdir = os.path.join(env_dir, 'pkg') if os.path.exists(pkgdir): # pragma: no branch (always true on windows?) rmtree(pkgdir)