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#!/bin/sh

# Slackware build script for RetroArch

# Copyright 2016-2017 Hunter Sezen California, USA
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

PRGNAM=RetroArch
VERSION=${VERSION:-1.6.7}
BUILD=${BUILD:-2}
TAG=${TAG:-_SBo}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

set -eu

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.xz
cd $PRGNAM-$VERSION
chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;

if [ "${DEBUG:-0}" = 1 ]; then
  DEBUG=1
  RELEASE=debug
  SLKCFLAGS="$(printf %s "$SLKCFLAGS" | sed 's/-O2/-O0 -g/')"
else
  DEBUG=0
  RELEASE=release
fi

if [ "${PYTHON:-0}" = 1 ]; then
  python='--enable-python'
  # Needed for python3 in the 14.1 SBo branch.
  if ! pkg-config --exists python3 && pkg-config --exists python-3.5; then
    sed -i 's/python3/python-3.5/' qb/config.libs.sh
  fi
else
  python=
fi

if [ "${GLES:-0}" = 1 ]; then
  gles='--enable-opengles'
elif [ "${GLES3:-0}" = 1 ]; then
  gles='--enable-opengles --enable-opengles3'
else
  gles=
fi

# Disable downloading cores with the online updater
# https://github.com/libretro/RetroArch/issues/3237
if [ "${BUILDBOT:-0}" != 1 ]; then
  SED_CORE="s|# libretro_directory =|libretro_directory = /usr/lib${LIBDIRSUFFIX}/libretro|"
  SED_INFO="s|# libretro_info_path =|libretro_info_path = /usr/lib${LIBDIRSUFFIX}/libretro/info|"
  SED_MENU='s|# menu_show_core_updater = true|menu_show_core_updater = false|'
else
  SED_CORE=
  SED_INFO=
  SED_MENU=
fi

# Set the config file default directories to be consistent with the installation.
sed -e "s|# audio_filter_dir =|audio_filter_dir = /usr/lib${LIBDIRSUFFIX}/retroarch/filters/audio|" \
    -e "s|# video_filter_dir =|video_filter_dir = /usr/lib${LIBDIRSUFFIX}/retroarch/filters/video|" \
    -e "$SED_CORE;$SED_INFO;$SED_MENU" \
    -i retroarch.cfg

# Disable keyboard input if window is not active
# https://github.com/libretro/RetroArch/commit/84d33fb847d62e833edbf75017d6861bb66aac31
zcat $CWD/udev.patch.gz | patch -p1

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --with-bin_dir=/usr/games \
  --with-man_dir=/usr/man \
  --with-assets_dir=/usr/share/games \
  --disable-dbus \
  --disable-update_assets \
  $gles $python

make GL_DEBUG="$DEBUG" VULKAN_DEBUG="$DEBUG"
make install DESTDIR=$PKG

for filter in audio video; do
  case $filter in
    audio )
      EXT=dsp
      DIR="libretro-common/$filter/dsp_filters"
    ;;
    video )
      EXT=filt
      DIR="gfx/${filter}_filters"
    ;;
  esac
  make -C $DIR build=$RELEASE
  install -dm0755 $PKG/usr/lib${LIBDIRSUFFIX}/retroarch/filters/$filter
  for ext in $EXT so; do
    install -m0644 $DIR/*.$ext $PKG/usr/lib${LIBDIRSUFFIX}/retroarch/filters/$filter
  done
done

mv $PKG/etc/retroarch.cfg $PKG/etc/retroarch.cfg.new

[ "$DEBUG" = 0 ] && \
  find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
    | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

find $PKG/usr/man -type f -exec gzip -9 {} \;
for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a CHANGES.md CONTRIBUTING.md COPYING README* $PKG/usr/doc/$PRGNAM-$VERSION
cp -a media/assets/COPYING $PKG/usr/doc/$PRGNAM-$VERSION/COPYING.assets
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
cat $CWD/doinst.sh > $PKG/install/doinst.sh

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}