## base directory (change if you want the everything in a different directory)
PYTHONMODULE="python/3.9.0"
PYTHONVER="3.9"

## register local modules directory
# echo "MODULEPATH=\"\$MODULEPATH:${BASEDIR}/modules\"" >> ~/.bashrc
MODULEPATH=$MODULEPATH:${BASEDIR}/modules

##load modules
module load ${PYTHONMODULE}
module load gcc/9.3.0
module load intel-parallel-studio/cluster.2020.4
module load cmake
module load ngsolve/serial

## generate basic directory structure
BASEDIR=~
cd $BASEDIR
mkdir -p src build packages modules

## fetch ngstrefftz sources
{ # try
    git clone https://github.com/PaulSt/ngstrefftz src/ngstrefftz
} || { # catch
    cd src/ngstrefftz && git pull && cd $BASEDIR
}
cd src/ngstrefftz && git submodule update --init --recursive && cd $BASEDIR

##generate BUILDTYPE tag from type, date, branch and commit:
TYPE=serial
TAG=`cd ${BASEDIR}/src/ngstrefftz && git describe --tags`
BRANCH=`cd ${BASEDIR}/src/ngstrefftz && git rev-parse --abbrev-ref HEAD`
DATE=`date +%Y-%m-%d`
BUILDTYPE=${DATE}-${TYPE}-${BRANCH}-${TAG}

##generate build dir
mkdir -p $BASEDIR/build/ngstrefftz
cd $BASEDIR/build/ngstrefftz
rm -rf ${BUILDTYPE}
mkdir ${BUILDTYPE}
cd ${BUILDTYPE}

##configure the build
CC=gcc CXX=g++ \
cmake \
-DCMAKE_BUILD_TYPE=RELEASE \
-DCMAKE_CXX_FLAGS="-ffast-math" \
-DCMAKE_INSTALL_PREFIX=${BASEDIR}/packages/ngstrefftz/${BUILDTYPE} \
-DCMAKE_CXX_COMPILER=g++ \
-DCMAKE_C_COMPILER=gcc \
${BASEDIR}/src/ngstrefftz/src

##build and install
make -j18
make install

cd ..

##register as new module:
mkdir -p ${BASEDIR}/modules/ngstrefftz
echo "#%Module1.0################################################# -*- tcl -*-
#
# GWDG Cluster gwdu10X

proc ModulesHelp { } {
  puts stderr "\tSets up environment for ngstrefftz"
}

module-whatis "ngstrefftz"

prereq        gcc/9.3.0
prereq        ${PYTHONMODULE}
prereq        intel-parallel-studio/cluster.2020.4
prereq        ngsolve/serial
conflict      ngstrefftz

set           base              ${BASEDIR}/packages/ngstrefftz/${BUILDTYPE}
append-path   PYTHONPATH        \$base/lib/python${PYTHONVER}/site-packages
" > ${BASEDIR}/modules/ngstrefftz/${BUILDTYPE}

rm -f ${BASEDIR}/modules/ngstrefftz/${TYPE}
ln -s ${BASEDIR}/modules/ngstrefftz/${BUILDTYPE} ${BASEDIR}/modules/ngstrefftz/${TYPE}