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# Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)
import re
from spack.package import *
class Which(AutotoolsPackage):
"""GNU which - is a utility that is used to find which executable (or
alias or shell function) is executed when entered on the shell prompt."""
homepage = "https://savannah.gnu.org/projects/which/"
url = "https://ftp.gnu.org/gnu/which/which-2.21.tar.gz"
version('2.21', sha256='f4a245b94124b377d8b49646bf421f9155d36aa7614b6ebf83705d3ffc76eaad')
executables = ['which']
@classmethod
def determine_version(cls, exe):
output = Executable(exe)('--version', output=str, error=str)
match = re.search(r'GNU which v(\d+.\d+)', output)
return match.group(1) if match else None
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