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# Maintainer: JP-Ellis <josh@jpellis.me>
pkgname=madgraph
pkgver=2.4.0
_dirname="MG5_aMC_v${pkgver//./_}"
pkgrel=20160929
pkgdesc="MadGraph5_aMC@NLO is a framework that aims at providing all the elements necessary for SM and BSM phenomenology"
url="http://madgraph.hep.uiuc.edu/"
arch=('i686' 'x86_64')
license=('MIT')
depends=('python2' 'bash' 'perl' 'tcsh' 'gcc-fortran')
source=("http://madgraph.hep.uiuc.edu/Downloads/MG5_aMC_v${pkgver}.tar.gz")
sha256sums=('9571bcdefb4a15546db1d403f6d2818fc4d21033558ca2a7d376cc71d197aa66')
options=("!strip")
prepare() {
# Some of the build steps below require this patch
msg2 "Fixing python references for python2"
cd ${srcdir}/${_dirname}
find . -type f -print0 | xargs -0 sed -i 's|^#!\s*\(/usr\)\?/bin/env\s\+python\s*$|#!/usr/bin/env python2|'
find . -type f -print0 | xargs -0 sed -i 's|^#!\s*\(/usr\)\?/bin/python\s*$|#!/usr/bin/env python2|'
msg2 "Building CutTools"
cd ${srcdir}/${_dirname}/vendor/CutTools
# CutTools' makefile does not allow parallel compilation, hence -j1
make -j1
make clean
# msg2 "Building DiscreteSampler"
msg2 "Can't build DiscreteSampler (if you need this, I welcome a patch)"
# cd ${srcdir}/${_dirname}/vendor/DiscreteSampler
# make
# make clean
msg2 "Building IREGI"
cd ${srcdir}/${_dirname}/vendor/IREGI/src
make
make clean
msg2 "Building SMWidth"
cd ${srcdir}/${_dirname}/vendor/SMWidth
make
make clean
msg2 "Building StdHEP"
cd ${srcdir}/${_dirname}/vendor/StdHEP
make
make clean
msg2 "Building Ninja"
cd ${srcdir}/${_dirname}/vendor/
tar xf ninja.tar.gz
rm ninja.tar.gz
cd ninja-1.1.0
./configure
make
make clean
msg2 "Building OneLoop"
cd ${srcdir}/${_dirname}/vendor/
tar xf oneloop.tar.gz
rm oneloop.tar.gz
cd OneLOop-3.6
./create.py
./clean.sh
msg2 "Extracting documentation"
cd ${srcdir}/${_dirname}
tar xf doc.tgz
rm doc.tgz
# This needs to be run again as there are new python files
msg2 "Fixing python references for python2"
cd ${srcdir}/${_dirname}
find . -type f -print0 | xargs -0 sed -i 's|^#!\s*\(/usr\)\?/bin/env\s\+python\s*$|#!/usr/bin/env python2|'
find . -type f -print0 | xargs -0 sed -i 's|^#!\s*\(/usr\)\?/bin/python\s*$|#!/usr/bin/env python2|'
msg2 "Removing CVS directories"
cd ${srcdir}/${_dirname}
find . -type d -name "CVS" | xargs rm -rf
find . -type f -name ".bzrignore" | xargs rm -f
find . -type f -name ".bzr" | xargs rm -rf
}
package() {
install -Dm755 "${srcdir}/${_dirname}/bin/mg5" "${pkgdir}/usr/bin/mg5"
install -Dm755 "${srcdir}/${_dirname}/bin/mg5_aMC" "${pkgdir}/usr/bin/mg5_aMC"
install -Dm755 "${srcdir}/${_dirname}/aloha/bin/aloha" "${pkgdir}/usr/bin/aloha"
install -Dm755 "${srcdir}/${_dirname}/MadSpin/madspin" "${pkgdir}/usr/bin/madspin"
# This should be converted to a proper patch file in the future
msg2 "Patching root_path"
find ${pkgdir}/usr/bin -type f -print0 | xargs -0 sed -i 's|^\(\s*\)root_path\s*=.*$|\1root_path = "/usr/share/madgraph"|'
install -Dm655 "${srcdir}/${_dirname}/LICENSE" "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE"
mkdir -p "${pkgdir}/usr/share/${pkgname}"
cp -a "${srcdir}/${_dirname}/." "${pkgdir}/usr/share/${pkgname}"
rm -r "${pkgdir}/usr/share/${pkgname}/bin"
rm -r "${pkgdir}/usr/share/${pkgname}/aloha/bin"
rm "${pkgdir}/usr/share/${pkgname}/MadSpin/madspin"
find "${pkgdir}/usr/share/${pkgname}" -type f -print0 | xargs -0 chmod 644
find "${pkgdir}/usr/share/${pkgname}" -type f -path "*/bin/*" -print0 | xargs -0 chmod 755
echo ""
echo "If you use MadGraph, please cite:"
echo "-----------------------------------------------------------------"
echo "Alwall, J., et al. \"The automated computation of tree-level and"
echo "next-to-leading order differential cross sections, and their"
echo "matching to parton shower simulations.\" Journal of High Energy"
echo "Physics 2014.7 (2014): 1-157."
echo "-----------------------------------------------------------------"
echo ""
}
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