#!/bin/sh

# Slackware build script for eduke32

# Written by B. Watson (yalhcru@gmail.com)

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

# 20160808 bkw:
# - update for 20160704_5811
# - install samples/ to the doc dir, not the game data dir
# - rework wrapper script to let mods like bloodcm be installed
#   system-wide in /usr/share/games/eduke32
# - add compilefix.diff to get the tools to build
# - support SDL2 build, add SDL2=no to force SDL1
# - use OPTIMIZATIONS instead of ARCH for $SLKCFLAGS, upstream
#   changed the build a bit
# - undocumented VPX flag now defaults to "yes", since libvpx is a
#   core Slackware 14.2 package
# - slack-desc shows SDL version and whether or not libvpx was used.

PRGNAM=eduke32
VERSION=${VERSION:-20160704_5811}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}

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

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

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"
fi

set -e

SRCVER=${VERSION/_/-}

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf ${PRGNAM}_${SRCVER}
tar xvf $CWD/${PRGNAM}_src_${SRCVER}.tar.xz
cd ${PRGNAM}_${SRCVER}
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 {} \;

# this was always undocumented, defaulted to "no" in Slack <= 14.1.
# should be safe to default to "yes" now that 14.2 has libvpx.
if [ "${VPX:-yes}" != "yes" ]; then
  VPXFLAG="USE_LIBVPX=0"
else
  ANDVPX=" and libvpx"
fi

patch -p1 < $CWD/compilefix.diff

# On some systems, the game spits out tons of warnings:
# Error: glGetTexLevelParameteriv returned GL_FALSE!
# These don't seem to actually hurt anything (the game looks
# and plays fine), so let's get rid of them to clean up
# the log output.
sed -i '/"Error: glGetTexLevelParameteriv/d' build/src/texcache.c

# SDL2 might be preferred for some users. Specifically, those of us
# who use a left-handed mouse (SDL1 gets the button mappings backwards).
SDL2=${SDL2:-auto}
if [ "$SDL2" = "auto" ]; then
  sdl2-config --version >/dev/null && SDL_TARGET=2
elif [ "$SDL2" = "yes" ]; then
  SDL_TARGET=2
else
  SDL_TARGET=1
fi

# Mildly confusing: the Makefile uses ARCH for arch-specific cflags
make \
  ARCH="" \
  OPTIMIZATIONS="$SLKCFLAGS" \
  SDL_TARGET=$SDL_TARGET \
  $VPXFLAG

# Build the utilities, if requested.
if [ "${BUILD_UTILS:-yes}" = "yes" ]; then
  make utils \
    OPTIMIZATIONS="$SLKCFLAGS" \
    ARCH="" \
    $VPXFLAG \
    SDL_TARGET=$SDL_TARGET \

  for i in kextract kgroup transpal wad2art wad2map; do
    install -s -D -m0755 $i $PKG/usr/games/$i
  done

  mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
  cp build/doc/* $PKG/usr/doc/$PRGNAM-$VERSION
fi

install -D -m0755 $PRGNAM $PKG/usr/libexec/$PRGNAM/$PRGNAM
install -D -m0755 mapster32 $PKG/usr/libexec/$PRGNAM/mapster32

mkdir -p $PKG/usr/man/man6
gzip -9c $CWD/$PRGNAM.6 > $PKG/usr/man/man6/$PRGNAM.6.gz

# Wrapper script to make things behave nicer
install -D -m0755 $CWD/$PRGNAM.wrapper  $PKG/usr/games/$PRGNAM
( cd $PKG/usr/games ; ln -s $PRGNAM mapster32 )

# Mapster help files
mkdir -p $PKG/usr/share/games/$PRGNAM
cd package/sdk
cp *.hlp *.HLP names.h tiles.cfg $PKG/usr/share/games/$PRGNAM
cd -

mkdir -p $PKG/usr/share/applications
cp $CWD/mapster32.desktop $CWD/$PRGNAM.desktop $PKG/usr/share/applications

mkdir -p $PKG/usr/share/pixmaps
cp $CWD/$PRGNAM.png $PKG/usr/share/pixmaps

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp build/buildlic.txt source/gpl-2.0.txt $CWD/README_game_data.txt \
  $PKG/usr/doc/$PRGNAM-$VERSION
cp -r package/sdk/samples $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

( cd $PKG/usr/share/games/$PRGNAM
  ln -s ../../../doc/$PRGNAM-$VERSION/README_game_data.txt . )

mkdir -p $PKG/install
sed -e "s,@SDL_TARGET@,$SDL_TARGET," \
    -e "s,@ANDVPX@,$ANDVPX," \
       $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}