# Maintainer: Angel Velasquez <angvp@archlinux.org>
# Maintainer: Felix Yan <felixonmars@archlinux.org>
# Contributor: Stéphane Gaudreault <stephane@archlinux.org>
# Contributor: Allan McRae <allan@archlinux.org>
# Contributor: Jason Chu <jason@archlinux.org>

# ALARM: Kevin Mihelich <kevin@archlinuxarm.org>
#  - removed valgrind from makedepends
#  - configure with --without-lto
#  - don't configure with --enable-optimizations - PGO kills builds

shopt -s extglob

pkgbase=python
pkgname=(python python-tests)
pkgver=3.9.0
pkgrel=1
_pybasever=${pkgver%.*}
pkgdesc="Next generation of the python high-level scripting language"
arch=('x86_64')
license=('custom')
url="https://www.python.org/"
depends=('bzip2' 'expat' 'gdbm' 'libffi' 'libnsl' 'libxcrypt' 'openssl' 'zlib')
makedepends=('tk' 'sqlite' 'bluez-libs' 'mpdecimal' 'llvm' 'gdb' 'xorg-server-xvfb' 'ttf-font')
source=("https://www.python.org/ftp/python/${pkgver%rc*}/Python-${pkgver}.tar.xz"{,.asc})
sha512sums=('b141039c9701a8cb0d15cd11a279153077524af4d0599e7d2c7279d4c18d05fda06b33ef82342d875de996c7117b7dc6eb154dc3669d38a1efa99801aeec6c5e'
            'SKIP')
validpgpkeys=('0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D'  # Ned Deily (Python release signing key) <nad@python.org>
              'E3FF2839C048B25C084DEBE9B26995E310250568') # Łukasz Langa (GPG langa.pl) <lukasz@langa.pl>

prepare() {
  cd Python-${pkgver}

  # FS#23997
  sed -i -e "s|^#.* /usr/local/bin/python|#!/usr/bin/python|" Lib/cgi.py

  # Speed up LTO
  sed -i -e "s|-flto |-flto=4 |g" configure configure.ac

  # Ensure that we are using the system copy of various libraries (expat, libffi, and libmpdec),
  # rather than copies shipped in the tarball
  rm -r Modules/expat
  rm -r Modules/_ctypes/{darwin,libffi}*
  rm -r Modules/_decimal/libmpdec
}

build() {
  cd Python-${pkgver}

  # PGO should be done with -O3
  # Also included the -fno-semantic-interposition optimization:
  # https://fedoraproject.org/wiki/Changes/PythonNoSemanticInterpositionSpeedup
  CFLAGS="${CFLAGS/-O2/-O3} -fno-semantic-interposition"
  LDFLAGS="$LDFLAGS -fno-semantic-interposition"

  # Disable bundled pip & setuptools
  ./configure --prefix=/usr \
              --enable-shared \
              --with-computed-gotos \
              --without-lto \
              --enable-ipv6 \
              --with-system-expat \
              --with-dbmliborder=gdbm:ndbm \
              --with-system-ffi \
              --with-system-libmpdec \
              --enable-loadable-sqlite-extensions \
              --without-ensurepip \
              --with-tzpath=/usr/share/zoneinfo

  # Obtain next free server number for xvfb-run; this even works in a chroot environment.
  export servernum=99
  while ! xvfb-run -a -n "$servernum" /bin/true 2>/dev/null; do servernum=$((servernum+1)); done

  LC_CTYPE=en_US.UTF-8 xvfb-run -s "-screen 0 1920x1080x16 -ac +extension GLX" -a -n "$servernum" make EXTRA_CFLAGS="$CFLAGS"
}

check() {
  # test_tk: https://bugs.python.org/issue41306
  # test_lib2to3: https://bugs.python.org/issue41970
  # test_tools: https://bugs.python.org/issue41971

  cd Python-${pkgver}

  # Obtain next free server number for xvfb-run; this even works in a chroot environment.
  export servernum=99
  while ! xvfb-run -a -n "$servernum" /bin/true 2>/dev/null; do servernum=$((servernum+1)); done

  LD_LIBRARY_PATH="${srcdir}/Python-${pkgver}":${LD_LIBRARY_PATH} \
  LC_CTYPE=en_US.UTF-8 xvfb-run -s "-screen 0 1920x1080x16 -ac +extension GLX" -a -n "$servernum" \
    "${srcdir}/Python-${pkgver}/python" -m test.regrtest -v -uall -x test_tk -x test_lib2to3 -x test_tools
}

package_python() {
  optdepends=('python-setuptools'
              'python-pip'
              'sqlite'
              'mpdecimal: for decimal'
              'xz: for lzma'
              'tk: for tkinter')
  provides=('python3')
  replaces=('python3')

  cd Python-${pkgver}

  # Hack to avoid building again
  sed -i 's/^all:.*$/all: build_all/' Makefile

  # PGO should be done with -O3
  CFLAGS="${CFLAGS/-O2/-O3}"

  make DESTDIR="${pkgdir}" EXTRA_CFLAGS="$CFLAGS" install

  # Split tests
  rm -r "$pkgdir"/usr/lib/python*/{test,ctypes/test,distutils/tests,idlelib/idle_test,lib2to3/tests,sqlite3/test,tkinter/test,unittest/test}

  # Why are these not done by default...
  ln -s python3               "${pkgdir}"/usr/bin/python
  ln -s python3-config        "${pkgdir}"/usr/bin/python-config
  ln -s idle3                 "${pkgdir}"/usr/bin/idle
  ln -s pydoc3                "${pkgdir}"/usr/bin/pydoc
  ln -s python${_pybasever}.1 "${pkgdir}"/usr/share/man/man1/python.1

  # some useful "stuff" FS#46146
  install -dm755 "${pkgdir}"/usr/lib/python${_pybasever}/Tools/{i18n,scripts}
  install -m755 Tools/i18n/{msgfmt,pygettext}.py "${pkgdir}"/usr/lib/python${_pybasever}/Tools/i18n/
  install -m755 Tools/scripts/{README,*py} "${pkgdir}"/usr/lib/python${_pybasever}/Tools/scripts/

  # License
  install -Dm644 LICENSE "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE"
}

package_python-tests() {
  pkgdesc="Regression tests packages for Python"
  depends=('python')

  cd Python-${pkgver}

  make DESTDIR="${pkgdir}" EXTRA_CFLAGS="$CFLAGS" libinstall
  cd "$pkgdir"/usr/lib/python*/
  rm -r !(test|ctypes|distutils|idlelib|lib2to3|sqlite3|tkinter|unittest)
  cd "$pkgdir"/usr/lib/python*/ctypes
  rm -r !(test)
  cd "$pkgdir"/usr/lib/python*/distutils
  rm -r !(tests)
  cd "$pkgdir"/usr/lib/python*/idlelib
  rm -r !(idle_test)
  cd "$pkgdir"/usr/lib/python*/lib2to3
  rm -r !(tests)
  cd "$pkgdir"/usr/lib/python*/sqlite3
  rm -r !(test)
  cd "$pkgdir"/usr/lib/python*/tkinter
  rm -r !(test)
  cd "$pkgdir"/usr/lib/python*/unittest
  rm -r !(test)
}