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import contextlib
import functools
import os
import sys
from typing import Generator
from typing import Sequence
from typing import Tuple
import pre_commit.constants as C
from pre_commit import parse_shebang
from pre_commit.envcontext import envcontext
from pre_commit.envcontext import PatchesT
from pre_commit.envcontext import UNSET
from pre_commit.envcontext import Var
from pre_commit.hook import Hook
from pre_commit.languages import helpers
from pre_commit.languages.python import bin_dir
from pre_commit.prefix import Prefix
from pre_commit.util import clean_path_on_failure
from pre_commit.util import cmd_output
from pre_commit.util import cmd_output_b
ENVIRONMENT_DIR = 'node_env'
healthy = helpers.basic_healthy
@functools.lru_cache(maxsize=1)
def get_default_version() -> str:
# nodeenv does not yet support `-n system` on windows
if sys.platform == 'win32':
return C.DEFAULT
# if node is already installed, we can save a bunch of setup time by
# using the installed version
elif all(parse_shebang.find_executable(exe) for exe in ('node', 'npm')):
return 'system'
else:
return C.DEFAULT
def _envdir(prefix: Prefix, version: str) -> str:
directory = helpers.environment_dir(ENVIRONMENT_DIR, version)
return prefix.path(directory)
def get_env_patch(venv: str) -> PatchesT:
if sys.platform == 'cygwin': # pragma: no cover
_, win_venv, _ = cmd_output('cygpath', '-w', venv)
install_prefix = fr'{win_venv.strip()}\bin'
lib_dir = 'lib'
elif sys.platform == 'win32': # pragma: no cover
install_prefix = bin_dir(venv)
lib_dir = 'Scripts'
else: # pragma: win32 no cover
install_prefix = venv
lib_dir = 'lib'
return (
('NODE_VIRTUAL_ENV', venv),
('NPM_CONFIG_PREFIX', install_prefix),
('npm_config_prefix', install_prefix),
('NPM_CONFIG_USERCONFIG', UNSET),
('npm_config_userconfig', UNSET),
('NODE_PATH', os.path.join(venv, lib_dir, 'node_modules')),
('PATH', (bin_dir(venv), os.pathsep, Var('PATH'))),
)
@contextlib.contextmanager
def in_env(
prefix: Prefix,
language_version: str,
) -> Generator[None, None, None]:
with envcontext(get_env_patch(_envdir(prefix, language_version))):
yield
def install_environment(
prefix: Prefix, version: str, additional_dependencies: Sequence[str],
) -> None:
additional_dependencies = tuple(additional_dependencies)
assert prefix.exists('package.json')
envdir = _envdir(prefix, version)
# https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx?f=255&MSPPError=-2147217396#maxpath
if sys.platform == 'win32': # pragma: no cover
envdir = fr'\\?\{os.path.normpath(envdir)}'
with clean_path_on_failure(envdir):
cmd = [
sys.executable, '-mnodeenv', '--prebuilt', '--clean-src', envdir,
]
if version != C.DEFAULT:
cmd.extend(['-n', version])
cmd_output_b(*cmd)
with in_env(prefix, version):
# https://npm.community/t/npm-install-g-git-vs-git-clone-cd-npm-install-g/5449
# install as if we installed from git
helpers.run_setup_cmd(prefix, ('npm', 'install'))
helpers.run_setup_cmd(
prefix,
('npm', 'install', '-g', '.', *additional_dependencies),
)
def run_hook(
hook: Hook,
file_args: Sequence[str],
color: bool,
) -> Tuple[int, bytes]:
with in_env(hook.prefix, hook.language_version):
return helpers.run_xargs(hook, hook.cmd, file_args, color=color)
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