# Maintainer: Manu
# Contributor: AlmAck

pkgname=sage-mathematics
pkgver=6.3
pkgrel=1
pkgdesc='SAGE: Open Source Mathematics Software, a viable free alternative to Magma, Maple, Mathematica, and Matlab.'
url='http://www.sagemath.org'
arch=('x86_64')
license=('GPL')
depends=('freetype2' 'libatomic_ops')
makedepends=('gcc-fortran' 'python2')
optdepends=('imagemagick: some plotting functionality benefits from it'
            'texlive-core: some plotting functionality benefits from it, also to use SageTeX'
            'openssh: to use the notebook in secure mode'
            'ffmpeg: to show animations'
            'cairo: R plots')
options=('!makeflags')
install="${pkgname}.install"
source=("http://mirror.switch.ch/mirror/sagemath/src/sage-${pkgver}.tar.gz"
        'sage.service'
        'sage-notebook.desktop')
md5sums=('668f080be70ffea8d67592ca00d161eb'
         '985da1c1d1dcdc3ea9aa73035cb7996b'
         '1c3e69dcf7bd5f6e9e092eb90e27fecb')

prepare() {
  # create DOT_SAGE directory
  if [[ -d ${srcdir}/build ]]; then
    rm -rf "${srcdir}/build"
  fi
  mkdir "${srcdir}/build"

  # according to FS#34769
  sed -e 's/FREETYPE/#FREETYPE/' -i "${srcdir}/sage-${pkgver}/build/install"

  sed -e 's/READLINE/#READLINE/' -i "${srcdir}/sage-${pkgver}/build/install"
}

build() {
  cd sage-${pkgver}

  # disable default makepkg flags (needed for singular and libgap)
  unset CFLAGS
  unset CXXFLAGS
  unset LDFLAGS
  ## flags
  # enable multiple threads while building, is this really needed? check if uses MAKEFLAGS
  export SAGE_BUILD_THREADS=$(lscpu | awk '/^CPU\(s\):/ { print $2 }')
  export MAKE="make -j${SAGE_BUILD_THREADS}"
  # do not build own gcc
  export SAGE_INSTALL_GCC='no'
  # disable debug
  export SAGE_DEBUG='no'
  # enable fat binaries
  export SAGE_FAT_BINARY='yes'
  # can't write to root in a clean chroot
  export DOT_SAGE="${srcdir}/build"
  # singular is broken
  export CPP='/usr/bin/cpp'
  # use chakra's fortran rather then the one that ships with sage to compile sage's fortran
  export FC='/usr/bin/gfortran'
  export SAGE64='yes'

  make
}

package() {
  cd sage-${pkgver}

  # remove build logs
  rm -f *.log
  rm -rf "${srcdir}/sage-${pkgver}/"{logs,upstream}
  
  # cp because make install is experimental and will corrupt the install
  install -dm755 "${pkgdir}/opt/sage"
  cp -r * "${pkgdir}/opt/sage/"
  
  # move SageTeX files to more appropriate directory
  install -d ${pkgdir}/usr/share
  mv ${pkgdir}/opt/sage/local/share/texmf \
    ${pkgdir}/usr/share

  # according to FS#37090
  # install scripts
  install -dm755 "${pkgdir}/usr/bin"
  ./sage -c "install_scripts('${pkgdir}/usr/bin', ignore_existing=True)"
  # rename scripts to avoid conflicts
  for ITEM in $(ls "${pkgdir}/usr/bin"); do
    mv "${pkgdir}/usr/bin/${ITEM}" "${pkgdir}/usr/bin/sage-${ITEM}"
  done
  # create link to main binary
  ln -s "/opt/sage/sage" "${pkgdir}/usr/bin/sage"
  
  # FIXME fix bad mtime
  cd "${pkgdir}/opt/sage/local/lib/python2.7"
  find . -name '*.py' -exec sh -c "rm {}c 2> /dev/null && python2 -m compileall {}" \;

  # install a systemd user unit
  install -Dm644 "${srcdir}/sage.service" "${pkgdir}/usr/lib/systemd/user/sage.service"
  # install *.desktop and icon files
  install -Dm644 "${srcdir}/sage-notebook.desktop" \
                 "${pkgdir}/usr/share/applications/sage-notebook.desktop"
  install -Dm644 "${pkgdir}/opt/sage/local/lib/python2.7/site-packages/sagenb-0.10.8.2-py2.7.egg/sagenb/data/sage/images/icon48x48.png" \
                 "${pkgdir}/usr/share/pixmaps/sage-notebook.png"

  # remove build logs
  rm -f ${pkgdir}/opt/sage/*.log
  rm -rf ${pkgdir}/opt/sage/spkg/logs

  # remove source packages, since they are rarely needed, they are 300mb in size (compressed)
  rm -f ${pkgdir}/opt/sage/spkg/base/*spkg
  rm -f ${pkgdir}/opt/sage/spkg/standard/*spkg
}