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from __future__ import annotations

import contextlib

import os

import sys

from typing import Generator

from typing import Sequence

import pre_commit.constants as C

from pre_commit.envcontext import envcontext

from pre_commit.envcontext import PatchesT

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

ENVIRONMENT_DIR = 'lua_env'

get_default_version = helpers.basic_get_default_version

healthy = helpers.basic_healthy

def _get_lua_version() -> str: # pragma: win32 no cover

"""Get the Lua version used in file paths."""

_, stdout, _ = cmd_output('luarocks', 'config', '--lua-ver')

return stdout.strip()

def get_env_patch(d: str) -> PatchesT: # pragma: win32 no cover

version = _get_lua_version()

so_ext = 'dll' if sys.platform == 'win32' else 'so'

return (

('PATH', (os.path.join(d, 'bin'), os.pathsep, Var('PATH'))),

(

'LUA_PATH', (

os.path.join(d, 'share', 'lua', version, '?.lua;'),

os.path.join(d, 'share', 'lua', version, '?', 'init.lua;;'),

(

'LUA_CPATH',

(os.path.join(d, 'lib', 'lua', version, f'?.{so_ext};;'),),

)

def _envdir(prefix: Prefix) -> str: # pragma: win32 no cover

directory = helpers.environment_dir(ENVIRONMENT_DIR, C.DEFAULT)

return prefix.path(directory)

@contextlib.contextmanager # pragma: win32 no cover

def in_env(prefix: Prefix) -> Generator[None, None, None]:

with envcontext(get_env_patch(_envdir(prefix))):

yield

def install_environment(

prefix: Prefix,

version: str,

additional_dependencies: Sequence[str],

) -> None: # pragma: win32 no cover

helpers.assert_version_default('lua', version)

envdir = _envdir(prefix)

with clean_path_on_failure(envdir):

with in_env(prefix):

# luarocks doesn't bootstrap a tree prior to installing

# so ensure the directory exists.

os.makedirs(envdir, exist_ok=True)

# Older luarocks (e.g., 2.4.2) expect the rockspec as an arg

for rockspec in prefix.star('.rockspec'):

make_cmd = ('luarocks', '--tree', envdir, 'make', rockspec)

helpers.run_setup_cmd(prefix, make_cmd)

# luarocks can't install multiple packages at once

# so install them individually.

for dependency in additional_dependencies:

cmd = ('luarocks', '--tree', envdir, 'install', dependency)

helpers.run_setup_cmd(prefix, cmd)

def run_hook(

hook: Hook,

file_args: Sequence[str],

color: bool,

) -> tuple[int, bytes]: # pragma: win32 no cover

with in_env(hook.prefix):

return helpers.run_xargs(hook, hook.cmd, file_args, color=color)

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