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# Copyright (c) 2017-2026 Juancarlo Añez (apalala@gmail.com)
# SPDX-License-Identifier: BSD-4-Clause
from __future__ import annotations
import importlib.util
import re
import shutil
from functools import cache
from pathlib import Path
from .itertools import first # bwcompat
__all__ = [
'first',
'cached_re_compile',
'module_available',
'module_missing',
'platform_has_command',
]
@cache
def cached_re_compile(
pattern: str | bytes | re.Pattern,
/,
flags: int = 0,
) -> re.Pattern:
if isinstance(pattern, re.Pattern):
return pattern
pattern = str(pattern)
return re.compile(pattern, flags=flags)
def module_available(name):
return importlib.util.find_spec(name) is not None
def module_missing(name):
return not module_available(name)
def platform_has_command(name) -> bool:
return shutil.which(name) is not None
def pathtomodulename(path: Path):
return str(path.with_suffix('')).replace('/', '.').replace('.__init__', '')
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