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# Copyright 2013-2021 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)
from spack import *
class Apfel(AutotoolsPackage):
"""APFEL is a library able to perform DGLAP evolution up to NNLO in QCD and
to NLO in QED, both with pole and MSbar masses. The coupled DGLAP
QCD+QED evolution equations are solved in x-space by means of higher
order interpolations and Runge-Kutta techniques."""
homepage = "https://github.com/scarrazza/apfel"
url = "https://github.com/scarrazza/apfel/archive/3.0.4.tar.gz"
version('3.0.4', sha256='c7bfae7fe2dc0185981850f2fe6ae4842749339d064c25bf525b4ef412bbb224')
depends_on('swig', when='+python')
depends_on('python', when='+python', type=('build', 'run'))
depends_on('lhapdf', when='+lhapdf', type=('build', 'run'))
variant('python', description='Build python wrapper', default=False)
variant('lhapdf', description='Link to LHAPDF', default=False)
def configure_args(self):
args = []
if self.spec.satisfies('~python'):
args.append('--disable-pywrap')
else:
args.append('--enable-pywrap')
args += self.enable_or_disable('lhapdf')
return args
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