#!/bin/sh

# Slackware build script for gzdoom

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

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

# 20201115 bkw: Add missing fix_zipdir.diff. Dammit.
# 20201107 bkw: Updated for 4.5.0.
# 20201027 bkw:
# - Updated for 4.4.2.
# - Add new zmusic dep.
# - Use 'make install/strip' now that it's supported.
# - Use upstream's icon, multiple sizes in /usr/share/icons.
# 20200302 bkw: Updated for 4.3.3.
# 20191201 bkw: Updated for 4.2.4.
# 20181022 bkw: Updated for 3.6.0.
# 20180827 bkw: Updated for 3.5.1.
# 20180801 bkw: Updated for 3.5.0.
# 20180623 bkw: Updated for 3.4.1 (released the day after my 3.4.0 update).
# 20180612 bkw: Updated for 3.4.0.
# 20180104 bkw: Updated for 3.2.5.
# 20171222 bkw: Updated for 3.2.4.
# 20170608 bkw:
# - Updated for 3.1.0. fmodapi support has been removed by upstream, so
#   it's no longer a dep.
# - Add OpenAL as a dep. Technically it's not required, as gzdoom will
#   happily compile & run without it... but it won't be able to make
#   any sound at all. Nobody wants this. If you disagree with my decision
#   to make OpenAL a hard dep, I don't want to hear about it (you won't
#   be able to make sound anyway, so I won't have to...)
# - Stop supporting old versions of gzdoom. The old versions are now
#   supported as "gzdoom-legacy" for those that need them.

PRGNAM=gzdoom
VERSION=${VERSION:-4.5.0}
BUILD=${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

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-g$VERSION $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-g$VERSION.tar.gz
cd $PRGNAM-g$VERSION || cd $PRGNAM-$VERSION
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 {} \+

# 20201027 bkw: fix the '<unknown version>' in the window title. This
# used to be done in an uglier way (with a patch that occasionally broke
# when applied against new gzdooms).
sed -i '/COMMAND.*UpdateRevision/s,^,# ,' src/CMakeLists.txt
( echo "#define GIT_DESCRIPTION \"$VERSION\""
  echo "#define GIT_HASH \"release\""
  echo "#define GIT_TIME __DATE__" ) > src/gitinfo.h

# 4.5.0 uses "if constexpr", which is a c++17 feature not supported by
# our compiler from 2016.
[ -e $CWD/compilefix.$VERSION.diff ] && \
  patch -p1 < $CWD/compilefix.$VERSION.diff

# 20201107 bkw: 4.5.0 needs this, patch comes from upstream git. Thanks
# to Steven Voges on the mailing list for pointing it out to me.
patch -p1 < $CWD/fix_zipdir.diff

# 3.1.0 started needing -DNDEBUG. Using ld.gold speeds up the final link
# enough to be worth using (saves 17+ sec on my test box).
SLKCFLAGS="$SLKCFLAGS -DNDEBUG -fuse-ld=gold"

# 20200302 bkw: gcc 5.5 needs this, not sure it's required by the C++ spec
sed -i '1i#include <cmath>' \
       src/rendering/swrenderer/drawers/r_draw.cpp \
       src/rendering/swrenderer/viewport/r_spritedrawer.cpp

mkdir -p build
cd build
  export "PATH=/opt/cmake-202x/bin:$PATH"
  cmake \
    -DCMAKE_C_FLAGS_RELEASE:STRING="$SLKCFLAGS -DSHARE_DIR=\\\"/usr/share/games/doom\\\"" \
    -DCMAKE_CXX_FLAGS_RELEASE:STRING="$SLKCFLAGS -DSHARE_DIR=\\\"/usr/share/games/doom\\\"" \
    -DINSTALL_DOCS_PATH=doc/$PRGNAM-$VERSION \
    -DINSTALL_PATH=games \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DLIB_SUFFIX=${LIBDIRSUFFIX} \
    -DMAN_INSTALL_DIR=/usr/man \
    -DCMAKE_BUILD_TYPE=Release ..
  make VERBOSE=1
  make install/strip DESTDIR=$PKG
cd ..

if fgrep -q '<unknown' src/gitinfo.h; then
  echo "*** BREAKAGE: gitinfo.h got regenerated with <unknown version>" 1>&2
  echo "*** Fix it, or get the maintainer to." 1>&2
  echo "*** Press ^C to abort or wait 5 seconds for the build to continue" 1>&2
  sleep 5
fi

# .desktop written for this SlackBuild
mkdir -p $PKG/usr/share/applications
cat $CWD/$PRGNAM.desktop > $PKG/usr/share/applications/$PRGNAM.desktop

# New-school desktop-ey icons.
for i in 16 22 32 48 64 128 256; do
  SIZE=${i}x${i}
  DIR=$PKG/usr/share/icons/hicolor/$SIZE/apps
  mkdir -p $DIR
  convert src/posix/zdoom.xpm -resize $SIZE $DIR/$PRGNAM.png
done

# Old-school windowmanagerish icon.
mkdir -p $PKG/usr/share/pixmaps
ln -s ../icons/hicolor/64x64/apps/$PRGNAM.png $PKG/usr/share/pixmaps/$PRGNAM.png

cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
cat $CWD/README_SBo.txt > $PKG/usr/doc/$PRGNAM-$VERSION/README_SBo.txt

# Fix DOS CRLF line endings. The stuff in licenses/ is already OK, for 2.3.2.
sed -i 's/\r//' $PKG/usr/doc/$PRGNAM-$VERSION/*.*

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}