# Maintainer: Antonio Rojas <arojas@archlinux.org>
# Contributor:  TDY <tdy@archlinux.info>
# Contributor: Rémy Oudompheng <oudomphe@clipper.ens.fr>

# ALARM: Kevin Mihelich <kevin@archlinuxarm.org>
#  - rm -fr "$pkgdir"/usr/lib/gap/pkg/digraphs-*/bin/lib/ for aarch64
#  - strip -m32 flags

pkgbase=gap
pkgname=(gap gap-doc gap-packages)
pkgver=4.12.0
pkgrel=3
pkgdesc='Groups, Algorithms, Programming: a system for computational discrete algebra'
arch=(x86_64)
url='https://www.gap-system.org/'
license=(GPL)
source=(https://github.com/gap-system/gap/releases/download/v$pkgver/$pkgbase-$pkgver.tar.gz
        https://github.com/gap-system/gap/commit/dce6fa96.patch
        gap.sh)
sha256sums=('6005d0c0316fe8803d84681f30be64eace83a9542f975f5cb3dedfadd4391849'
            'd8a362a6c1d27f2925d8b3f8eddc9aaafac1699fb568a035768d039b34ba6eb3'
            '143fb8a79a52c007903cce13407850df309ef803a9b00398d05169355917de46')
makedepends=(libxaw givaro mpfi cddlib boost libsemigroups c-xsc zeromq fplll wget chrpath fmt eigen normaliz)

prepare() {
  cd gap-$pkgver

# Fix including headers when no garbage collector is specified
  patch -p1 < ../dce6fa96.patch
# Use system libsemigroups
  sed -e 's|test "$with_external_libsemigroups" = yes|true|' -i pkg/semigroups/configure
# Use system normaliz
  sed -e 's|.\/build-normaliz.sh|true|' -i bin/BuildPackages.sh
# Fix https://bugs.archlinux.org/task/55174
  sed -e '/xgap/d' -i pkg/sonata/PackageInfo.g
  sed -e '/XGAP/d' -i pkg/cryst/PackageInfo.g
# Strip -m32 flags
  sed -e '/-m32/d' -i bin/BuildPackages.sh
}

build() {
  cd gap-$pkgver
  ./configure --prefix=/usr --with-gmp=system

  # https://bugzilla.gnome.org/show_bug.cgi?id=655517
  sed -i -e 's/ -shared / -Wl,-O1,--as-needed\0/g' libtool

  make
  make libgap.la

  # Install libgap so we can link packages against it
  mkdir -p tmp-install
  libtool --mode=install install libgap.la "$srcdir"/gap-$pkgver/tmp-install
  rm "$srcdir"/gap-$pkgver/tmp-install/libgap.la

  cd pkg
  export CFLAGS+=" -fcommon" # Fix anupq and cohomolo build with GCC 10
  export CXXFLAGS+=" -I/usr/include/cxsc" # Find c-xsc headers
  export CXXFLAGS+=" -I/usr/include/eigen3" # Fix build of semigroups
  export LDFLAGS+=" -L$srcdir/gap-$pkgver/tmp-install -lgap" # See https://trac.sagemath.org/ticket/27372
  export LD_LIBRARY_PATH="$srcdir"/gap-$pkgver/tmp-install
  ../bin/BuildPackages.sh --strict
}

_standardpkgs=(gapdoc primgrp smallgrp transgrp atlasrep autpgrp alnuth crisp ctbllib factint fga irredsol laguna
               polenta polycyclic resclasses sophus tomlib)

package_gap() {
  depends=(gmp zlib)
  optdepends=('gap-packages: extra packages' 'gap-doc: documentation')
  cd gap-$pkgver

  install -Dm644 src/*.h -t "$pkgdir"/usr/include/gap
  install -Dm644 build/config.h -t "$pkgdir"/usr/include/gap
  install -Dm644 src/hpc/*.h -t "$pkgdir"/usr/include/gap/hpc

  install -d "$pkgdir"/usr/lib
  libtool --mode=install install libgap.la "$pkgdir"/usr/lib

  mkdir -p "$pkgdir"/usr/{bin,lib/gap/pkg}
  cp -r grp lib "$pkgdir"/usr/lib/gap
  for _pkg in ${_standardpkgs[@]}; do
    cp -r pkg/$_pkg "$pkgdir"/usr/lib/gap/pkg
  done
  install -Dm755 gap -t "$pkgdir"/usr/lib/gap
  sed -e "s|$PWD|/usr/lib/gap|g" -e "s|-I/usr/lib|-I/usr/include|g" -i sysinfo.gap
  cp -ar sysinfo.gap* "$pkgdir"/usr/lib/gap
# Install launcher script
  install -Dm755 "$srcdir"/gap.sh "$pkgdir"/usr/bin/gap

  mkdir -p "$pkgdir"/usr/share
  ln -s /usr/lib/gap -t "$pkgdir"/usr/share # expected by sagemath

# Add provides for bundled packages
  for _f in "$pkgdir"/usr/lib/gap/pkg/*/PackageInfo.g; do
    _pkg=$(cat $_f | sed -ze 's|:=\n|:=|g' | grep PackageName | tr '\n' ' ' | cut -d '"' -f2 | tr '[:upper:]' '[:lower:]')
    _ver=$(cat $_f | sed -ze 's|:=\n|:=|g' | grep Version | tr '\n' ' ' | cut -d '"' -f2)
    _prov="gap-$_pkg=${_ver/-/.}"
    provides+=($_prov)
  done
}

package_gap-doc() {
  depends=(gap)
  pkgdesc="Documentation for GAP"
  cd gap-$pkgver

  mkdir -p "$pkgdir"/usr/lib/gap
  cp -r doc "$pkgdir"/usr/lib/gap
}

package_gap-packages() {
  depends=(gap)
  optdepends=('libxaw: xgap package' 'c-xsc: float package' 'mpfi: float package'
              'libmpc: float package' 'fplll: float package' 'zeromq: ZeroMQ interface package' 'planarity: digraph package'
              'curl: curl interface package' 'libsemigroups: semigroups package' 'cddlib: CddLib interface package'
              'normaliz: NormalizInterface package')
  pkgdesc="Extra packages for GAP"
  cd gap-$pkgver

  mkdir -p "$pkgdir"/usr/{bin,lib/gap}
  cp -r pkg "$pkgdir"/usr/lib/gap

# fix xgap launch script
  sed -e "s|/build/gap/src/gap-$pkgver|/usr/lib/gap|g" -e 's|^GAP=.*|GAP=/usr/lib/gap/gap|g' \
    "$pkgdir"/usr/lib/gap/pkg/xgap/xgap.sh > "$pkgdir"/usr/bin/xgap
  chmod 755 "$pkgdir"/usr/bin/xgap
  rm "$pkgdir"/usr/lib/gap/pkg/xgap/xgap.sh

# provided by main gap package
  for _pkg in ${_standardpkgs[@]}; do
    rm -r "$pkgdir"/usr/lib/gap/pkg/$_pkg
  done

# fix RPATH
  find "$pkgdir"/usr/lib/gap/pkg/ -name '*.so' | xargs chrpath -d

# remove bundled planarity
  rm -fr "$pkgdir"/usr/lib/gap/pkg/digraphs/bin/lib/

# remove leftover binaries and source files
  find "$pkgdir"/usr/lib/gap/pkg -name .libs -o -name '*.o' | xargs rm -fr
  find "$pkgdir"/usr/lib/gap/pkg -type d -name src | xargs rm -fr
  rm -r "$pkgdir"/usr/lib/gap/pkg/digraphs/extern
  rm -r "$pkgdir"/usr/lib/gap/pkg/semigroups/libsemigroups
  rm -r "$pkgdir"/usr/lib/gap/pkg/caratinterface/carat*
  rm -r "$pkgdir"/usr/lib/gap/pkg/kbmag/standalone
  rm -r "$pkgdir"/usr/lib/gap/pkg/log

# Add provides for bundled packages
  for _f in "$pkgdir"/usr/lib/gap/pkg/*/PackageInfo.g; do
    _pkg=$(cat $_f | sed -ze 's|:=\n|:=|g' | grep PackageName | tr '\n' ' ' | cut -d '"' -f2 | tr '[:upper:]' '[:lower:]')
    _ver=$(cat $_f | sed -ze 's|:=\n|:=|g' | grep Version | tr '\n' ' ' | cut -d '"' -f2)
    _prov="gap-$_pkg=${_ver/-/.}"
    provides+=($_prov)
  done
}