#!/bin/bash

# Slackware build script for snes9x

# Written by B. Watson (urchlay@slackware.uk)

# Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.

# 20230418 bkw: BUILD=2, make portaudio optional + autodetected.
# 20230410 bkw: update for 1.62.3.
# Most of the work needed for this update was done by M.Dinslage,
# to whom I owe thanks. I updated the man page, and added the
# non-GUI binary plus a man page for it.

# For older change-comments, see ChangeLog.old (it was getting too long
# to keep in the script).

cd $(dirname $0) ; CWD=$(pwd)

PRGNAM=snes9x
VERSION=${VERSION:-1.62.3}
BUILD=${BUILD:-2}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

SPIRVVER="2021-01-15"
VULKVER="1.3.246"
GLSLANGVER="12.1.0"

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

if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

# Note: the flags we set here are followed by -O3, meaning the
# -O2 does nothing. *shrug*
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 -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
# Don't extract the stuff we don't need, this saves a few MB in $TMP.
tar xvf $CWD/$PRGNAM-$VERSION.tar.gz \
        --wildcards \
        --exclude '*/win32/*' \
        --exclude '*/macosx/*'
cd $PRGNAM-$VERSION

tar xvf $CWD/glslang-$GLSLANGVER.tar.gz \
  -C external/glslang --strip-components=1
tar xvf $CWD/SPIRV-Cross-$SPIRVVER.tar.gz \
  -C external/SPIRV-Cross --strip-components=1
tar xvf $CWD/Vulkan-Headers-$VULKVER.tar.gz \
  -C external/vulkan-headers --strip-components=1

chown -R root:root .
find -L .  -perm /111 -a \! -perm 755 -a -exec chmod 755 {} \+ -o \
        \! -perm /111 -a \! -perm 644 -a -exec chmod 644 {} \+

WITHPULSE=yes
if [ "$PULSE" = "no" ] || ! pkg-config --exists libpulse; then
  PULSEOPT="-DUSE_PULSEAUDIO=OFF"
  WITHPULSE=no
fi

WITHOSS=yes
if [ "${OSS:-no}" = "no" ]; then
  OSSOPT="-DUSE_OSS=OFF"
  WITHOSS=no
fi

WITH_PA=no
PA_OPT="-DUSE_PORTAUDIO=OFF"
if pkg-config --exists portaudio-2.0 && [ "${PORTAUDIO:-yes}" = "yes" ]; then
  WITH_PA=yes
  PA_OPT="-DUSE_PORTAUDIO=ON"
fi

SLKCFLAGS+=" -DNDEBUG"
mkdir -p gtk/build
cd gtk/build
  cmake \
    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DCMAKE_INSTALL_BINDIR=games \
    $PULSEOPT $OSSOPT $PA_OPT \
    -DCMAKE_INSTALL_DATAROOTDIR=share \
    -DUSE_SYSTEMZIP=OFF \
    -DCMAKE_BUILD_TYPE=Release ..
  make VERBOSE=1
  make install/strip DESTDIR=$PKG
cd -

# 20230410 bkw: Insidious weirdness: The bitmap icons all look the
# same, but the .svg icon looks completely different. Just get rid
# of it; we have the bitmap icons at every size we could want.
rm -rf $PKG/usr/share/icons/hicolor/scalable

# RetroArch support, contributed by orbea (Hunter Sezen).
# Note that the source here is self-contained, there's no build-time
# dependency on RetroArch or libretro or such.
# snes9x_libretro-info originally came from:
# https://raw.githubusercontent.com/libretro/libretro-super/383f18fd7c36ffd5fe76ebac58e9e596dde67e66/dist/info/snes9x_libretro.info
# Renamed .info => .info.txt to avoid confusing SBo tools that deal with
# SBo's .info files.
# 20181201 bkw: made this optional, auto-detected, and controllable
# via environment. It makes the build take 7x as long, no point wasting
# time building it if it's not wanted/needed.

case "$RETROARCH" in
  yes) build_ra=yes ;;
  no)  build_ra=no ;;
  *)   if [ -x /usr/share/games/retroarch ]; then
         build_ra=yes
       else
         build_ra=no
       fi ;;
esac

if [ "$build_ra" = "yes" ]; then
  echo "=== Building libretro core"
  ( LIBNAM=${PRGNAM}_libretro
    PKGLIB=$PKG/usr/lib$LIBDIRSUFFIX
    cd libretro
    make LTO="-flto=jobserver"
    install -sDm0755 $LIBNAM.so $PKGLIB/libretro/$LIBNAM.so
    install -Dm0644 -o root -g root $CWD/$LIBNAM.info.txt \
      $PKGLIB/libretro/info/$LIBNAM.info
  )
else
  echo "=== NOT building libretro core"
fi

# Go ahead and include the non-gui binary. Note that it doesn't
# support OSS or Pulse (only ALSA), so the OSS and PULSE environment
# vars don't affect it.
cd unix
  CFLAGS="$SLKCFLAGS" \
  CXXFLAGS="$SLKCFLAGS" \
  ./configure \
    --prefix=/usr \
    --libdir=/usr/lib${LIBDIRSUFFIX} \
    --sysconfdir=/etc \
    --localstatedir=/var \
    --mandir=/usr/man \
    --docdir=/usr/doc/$PRGNAM-$VERSION \
    --enable-gamepad \
    --enable-gzip \
    --enable-screenshot \
    --enable-zip \
    --without-system-zip \
    --build=$ARCH-slackware-linux
  make
cd -

# No 'make install' target.
install -s -m0755 unix/snes9x $PKG/usr/games/snes9x

# Man pages written by SlackBuild author.
mkdir -p $PKG/usr/man/man6
gzip -9c $CWD/snes9x-gtk.6 > $PKG/usr/man/man6/snes9x-gtk.6.gz
gzip -9c $CWD/snes9x.6 > $PKG/usr/man/man6/snes9x.6.gz

PKGDOC=$PKG/usr/doc/$PRGNAM-$VERSION
mkdir -p $PKGDOC
cp -a LICENSE README* docs/* unix/docs/* unix/snes9x.conf.default $PKGDOC
cat $CWD/$PRGNAM.SlackBuild > $PKGDOC/$PRGNAM.SlackBuild

mkdir -p $PKG/install
sed -e "s,@PU@,$WITHPULSE," \
    -e "s,@OSS@,$WITHOSS," \
    -e "s,@PA@,$WITH_PA," \
    -e "s,@RA@,$build_ra," \
    < $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