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from __future__ import annotations
import contextlib
import os.path
from collections.abc import Generator
from collections.abc 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]:
envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
with envcontext(get_env_patch(envdir)):
yield
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