#!/bin/bash

# Slackware build script for zdoom

# Originally written by Pablo Santamaria (email removed)

# Modified and now maintained by B. Watson <yalhcru@gmail.com>. Original
# version had no license, modified version released under the WTFPL,
# see http://www.wtfpl.net/txt/copying/ for details.

# 20170207 bkw:
# - Take over maintenance, update for v2.8.1, BUILD=1. Upstream
#   says zdoom development has halted, so 2.8.1 should be the last
#   version ever.
# - i486 => i586.
# - Add SDL2 to REQUIRES as upstream no longer supports SDL1.
# - Remove TiMidity++ from REQUIRES as it's no longer required (likely,
#   it never was).
# - Use .tar.gz source from github rather than .7z from zdoom.org. The
#   source is identical except for CRLF line endings and a generated
#   gitinfo.h file.
# - Remove p7zip from REQUIRES, now that we're using .tar.gz source.
# - Fix the build so when fmodapi is built in, it'll actually *work*.
#   Original version of this script required fmodapi at compile time,
#   but failed to install liboutput_sdl.so, meaning fmodapi wasn't
#   usable at runtime.
# - Replace crappy looking 16x16 "Z" icon with a larger higher-res version,
#   the "Z" from this image: https://zdoom.org/wiki/File:Logo_phpBB.gif
# - Various cosmetic script fixes.

# Note to the purists out there: I listed fmodapi as a hard dependency and
# OpenAL as optional. Actually, they're both optional. One or the other
# is required for the game to make sound at all though. I'd say the vast
# majority of users (myself included) would consider a sound-less Doom
# engine an incomplete implementation of the game, and would get annoyed
# if a default build didn't include sound. You may disagree with this,
# but please do so quietly, as though you also had been compiled without
# sound support :)

PRGNAM=zdoom
VERSION=${VERSION:-2.8.1}
BUILD=${BUILD:-1}
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 -e

# Decide whether to build OpenAL support in.
OPENAL="${OPENAL:-auto}"
if [ "$OPENAL" = "auto" ]; then
  if [ -e /usr/include/AL ]; then
    OPENAL=yes
  else
    OPENAL=no
  fi
fi

case "$OPENAL" in
  y*|Y*|t*|T*|1|[oO][nN])
    OPENAL=yes
    OPENALOPT="-DNO_OPENAL=OFF"
    WITHOPENAL=WITH
    ;;
  *)
    OPENAL=no
    OPENALOPT="-DNO_OPENAL=ON"
    WITHOPENAL=WITHOUT
    ;;
esac

# I could do the same as above for fluidsynth, but it's not necessary.
# By default, zdoom loads it dynamically at runtime, and if it's missing,
# the game runs anyway... and if fluidsynth is installed after the fact,
# it'll Just Work (no need to recompile). Also, TiMidity++ is purely an
# optional runtime dep.

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
cd $PRGNAM-$VERSION
chown -R root:root .

# Slight template deviation: I used \+ rather than \; (same result, but maybe
# 40x faster).
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 -o -perm 511 \) \
 -exec chmod 755 {} \+ -o \
 \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
 -exec chmod 644 {} \+

# gitinfo.h made like so:
## git clone https://github.com/rheit/zdoom.git
## git reset <commit ID, as listed on github's releases page>
## cd zdoom/tools/updaterevision
## cmake .
## make
## ./updaterevision ../../../gitinfo.h
# Without this, we get fugly <unknown version> in the window's title.

cat $CWD/gitinfo.h > src/gitinfo.h

# Set default directory for IWADs (share with other doom engines, e.g. prboom)
sed -i 's|/usr/local/share/|/usr/share/games/doom/|' src/posix/i_system.h

# fmodapi support tries to find its lib in the current dir, fix it:
sed -i \
  "s,setPluginPath(progdir),setPluginPath(\"/usr/lib$LIBDIRSUFFIX/$PRGNAM\")," \
  src/sound/fmodsound.cpp

mkdir release
cd release

cmake \
  -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
  -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
  -DCMAKE_BUILD_TYPE="Release" \
  -DFMOD_LIBRARY=/usr/lib${LIBDIRSUFFIX}/libfmodex${LIBDIRSUFFIX}.so \
  $OPENALOPT \
  ..

make

mkdir -p \
  $PKG/usr/games \
  $PKG/usr/share/applications \
  $PKG/usr/share/pixmaps \
  $PKG/usr/share/games/doom \
  $PKG/usr/lib$LIBDIRSUFFIX/$PRGNAM

# No 'make install' target, though there are some cmake_install.cmake files.
# Manual install is simple enough anyway.
install -s -m755 $PRGNAM $PKG/usr/games
[ -e liboutput_sdl.so ] && \
  install -s -m755 liboutput_sdl.so $PKG/usr/lib$LIBDIRSUFFIX/$PRGNAM
install -m644 $PRGNAM.pk3 $PKG/usr/share/games/doom/
install -m644 $CWD/$PRGNAM.png $PKG/usr/share/pixmaps/
install -m644 $CWD/$PRGNAM.desktop $PKG/usr/share/applications/

cd ..

# Get rid of CRLF endings in the docs.
PKGDOC=$PKG/usr/doc/$PRGNAM-$VERSION
mkdir -p $PKGDOC
for i in docs/*; do
  sed 's,\r,,' $i > $PKGDOC/$( basename $i )
done
cat $CWD/$PRGNAM.SlackBuild > $PKGDOC/$PRGNAM.SlackBuild

# Make slack-desc tell us whether OpenAL was built in or not.
mkdir -p $PKG/install
sed "s,@WITHOPENAL@,$WITHOPENAL,g" $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}