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from __future__ import annotations

import contextlib

import os

import sys

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.prefix import Prefix

from pre_commit.util import cmd_output

ENVIRONMENT_DIR = 'lua_env'

get_default_version = lang_base.basic_get_default_version

health_check = lang_base.basic_health_check

run_hook = lang_base.basic_run_hook

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};;'),),

)

@contextlib.contextmanager # pragma: win32 no cover

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

def install_environment(

prefix: Prefix,

version: str,

additional_dependencies: Sequence[str],

) -> None: # pragma: win32 no cover

lang_base.assert_version_default('lua', version)

envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)

with in_env(prefix, version):

# 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)

lang_base.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)

lang_base.setup_cmd(prefix, cmd)

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