#!/bin/bash

# Slackware build script for doomretro

# Copyright 2017 Dugan Chen Canada
# Copyright 2020-2023 B. Watson
# 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.

# 20230715 bkw: update for v4.9.2.
# - finally fix the segfaults when the music changes.
# - remove music note from README, since music works now.
# - remove -nomusic from the .desktop file.

# 20230114 bkw: update for v4.7.2, add note about music to README.
# 20220611 bkw: update for v4.5.1, fix 16x16 icon path.
# 20211006 bkw:
# - update for v4.2.3.
# - get rid of wrapper script; game now picks an IWAD itself.
# 20210224 bkw: update for v4.0.3
# 20200927 bkw: update for v3.6.1, reformat README to 72 chars
# 20200804 bkw: update for v3.5.10
# 20200413 bkw:
# - take over maintenance
# - update for v3.5.4
# - move binary to /usr/games
# - include wrapper script

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

PRGNAM=doomretro
VERSION=${VERSION:-4.9.2}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

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}

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

LIBNAM=SDL2_mixer
LIBVER=${LIBVER:-2.0.4}

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
TOPDIR=$TMP/$PRGNAM-build
rm -rf $TOPDIR
mkdir -p $TOPDIR
cd $TOPDIR

tar xvf $CWD/$LIBNAM-$LIBVER.tar.lz

# All these --excludes save ~30MB in /tmp, and avoid the recursive chmod
# tripping over broken symlinks.
tar xvf $CWD/$PRGNAM-$VERSION.tar.gz \
  --exclude=xcode \
  --exclude=codeblocks \
  --exclude=msvc \
  --exclude=SDL2\*

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 {} \+

# 20230715 bkw: This is an ugly way to fix an issue caused by Slackware's
# SDL2_mixer package. doomretro uses SDL2_mixer's FluidSynth support for
# its music. And SDL2_mixer-2.0.4 (what's in Slackware 15.0) has a crashing
# bug: any time Mix_FreeMusic(handle) is called when the handle is using
# fluidsynth, we get a use-after-free that causes the app to segfault.
# More details, including a link to the patch I use, here:
# https://github.com/FluidSynth/fluidsynth/issues/748
# The fix, here, is to build a *static* patched SDL2_mixer for
# doomretro to link with. Lot of work, but it does fix the issue. When
# Slackware 15.1 releases, we should be able to get rid of this.

mkdir -p $LIBNAM-install
cd $LIBNAM-$LIBVER

patch -p0 < $CWD/fix-sdl-mixer-fluidsynth.diff

# N.B. --disable-music-mp3-mad-gpl because enabling it breaks the build,
# as we have no static libmad.a. doesn't matter, because doomretro doesn't
# use mp3 audio anyway.
CFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=$TOPDIR/$LIBNAM-install \
  --sysconfdir=/etc \
  --disable-shared \
  --enable-static \
  --disable-dependency-tracking \
  --disable-music-mp3-mad-gpl \
  --build=$ARCH-slackware-linux

make
make install

# this actually works fine, amazingly enough:
export PKG_CONFIG_PATH=$TOPDIR/$LIBNAM-install/lib/pkgconfig:$PKG_CONFIG_PATH

cd $TOPDIR/$PRGNAM-$VERSION
mkdir -p build
cd build
  cmake \
    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DCMAKE_BUILD_TYPE=Release ..
  make
  make install/strip DESTDIR=$PKG
cd ..

mv $PKG/usr/bin $PKG/usr/games

mkdir -p $PKG/usr/share/applications
cat $CWD/$PRGNAM.desktop > $PKG/usr/share/applications/$PRGNAM.desktop

hicolor=$PKG/usr/share/icons/hicolor
mkdir -p $hicolor/{16x16,32x32,48x48,256x256}/apps
convert res/$PRGNAM.ico[0] $hicolor/256x256/apps/$PRGNAM.png
convert res/$PRGNAM.ico[1] $hicolor/48x48/apps/$PRGNAM.png
convert res/$PRGNAM.ico[2] $hicolor/32x32/apps/$PRGNAM.png
convert res/$PRGNAM.ico[3] $hicolor/16x16/apps/$PRGNAM.png
mkdir -p $PKG/usr/share/pixmaps
ln -s ../icons/hicolor/48x48/apps/$PRGNAM.png $PKG/usr/share/pixmaps

# 20230715 bkw: include COPYING.txt from SDL2_mixer, since we statically
# link it to the binary.
PKGDOC=$PKG/usr/doc/$PRGNAM-$VERSION
mkdir -p $PKGDOC
cp -a CODEOWNERS LICENSE *.md $PKGDOC
cp -a $TOPDIR/$LIBNAM-$LIBVER/COPYING.txt $PKGDOC/COPYING-SDL2_mixer.txt
cat $CWD/$PRGNAM.SlackBuild > $PKGDOC/$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