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import contextlib
import os
from typing import Generator
from typing import Sequence
from typing import Tuple
from pre_commit.envcontext import envcontext
from pre_commit.envcontext import PatchesT
from pre_commit.envcontext import SubstitutionT
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.prefix import Prefix
from pre_commit.util import clean_path_on_failure
from pre_commit.util import cmd_output_b
ENVIRONMENT_DIR = 'conda'
get_default_version = helpers.basic_get_default_version
healthy = helpers.basic_healthy
def get_env_patch(env: str) -> PatchesT:
# On non-windows systems executable live in $CONDA_PREFIX/bin, on Windows
# they can be in $CONDA_PREFIX/bin, $CONDA_PREFIX/Library/bin,
# $CONDA_PREFIX/Scripts and $CONDA_PREFIX. Whereas the latter only
# seems to be used for python.exe.
path: SubstitutionT = (os.path.join(env, 'bin'), os.pathsep, Var('PATH'))
if os.name == 'nt': # pragma: no cover (platform specific)
path = (env, os.pathsep, *path)
path = (os.path.join(env, 'Scripts'), os.pathsep, *path)
path = (os.path.join(env, 'Library', 'bin'), os.pathsep, *path)
return (
('PYTHONHOME', UNSET),
('VIRTUAL_ENV', UNSET),
('CONDA_PREFIX', env),
('PATH', path),
)
@contextlib.contextmanager
def in_env(
prefix: Prefix,
language_version: str,
) -> Generator[None, None, None]:
directory = helpers.environment_dir(ENVIRONMENT_DIR, language_version)
envdir = prefix.path(directory)
with envcontext(get_env_patch(envdir)):
yield
def _conda_exe() -> str:
if os.environ.get('PRE_COMMIT_USE_MICROMAMBA'):
return 'micromamba'
elif os.environ.get('PRE_COMMIT_USE_MAMBA'):
return 'mamba'
else:
return 'conda'
def install_environment(
prefix: Prefix,
version: str,
additional_dependencies: Sequence[str],
) -> None:
helpers.assert_version_default('conda', version)
directory = helpers.environment_dir(ENVIRONMENT_DIR, version)
conda_exe = _conda_exe()
env_dir = prefix.path(directory)
with clean_path_on_failure(env_dir):
cmd_output_b(
conda_exe, 'env', 'create', '-p', env_dir, '--file',
'environment.yml', cwd=prefix.prefix_dir,
)
if additional_dependencies:
cmd_output_b(
conda_exe, 'install', '-p', env_dir, *additional_dependencies,
cwd=prefix.prefix_dir,
)
def run_hook(
hook: Hook,
file_args: Sequence[str],
color: bool,
) -> Tuple[int, bytes]:
# TODO: Some rare commands need to be run using `conda run` but mostly we
# can run them without which is much quicker and produces a better
# output.
# cmd = ('conda', 'run', '-p', env_dir) + hook.cmd
with in_env(hook.prefix, hook.language_version):
return helpers.run_xargs(hook, hook.cmd, file_args, color=color)
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