#!/bin/bash

# Slackware build script for srb2

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

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

# 20230714 bkw: updated for v2.2.11.
# - new deps (see .info file).
# - cmake sed stuff to allow building without net access.
# - new-style icons.

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

PRGNAM=srb2
VERSION=${VERSION:-2.2.11}
BUILD=${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

rm -rf $PKG
mkdir -p $TMP/$PRGNAM $PKG $OUTPUT
cd $TMP/$PRGNAM
rm -rf SRB2-SRB2_release_$VERSION

# There's a lot of stuff in the source that we don't need. All the
# --exclude stuff saves 182MB of space in $TMP.
tar xvf $CWD/SRB2-SRB2_release_$VERSION.tar.gz \
  --exclude '*/libs' \
  --exclude '*/android' \
  --exclude '*/windows-installer' \
  --exclude '*/bin' \
  --exclude '*/objs' \
  --exclude '*/tools'

cd SRB2-SRB2_release_$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 {} \+

# Assets (actually WAD and pk3 aka zip files) aren't found in the
# source, have to download them separately. The build actually checks
# for them & refuses to compile if they're missing, which is kinda
# unfair since it doesn't ship with the damn things... so we have to
# extract them from the 'full' zip file. Can't just touch them, since
# the md5sums of the files get hardcoded into the binary (and it'll
# refuse to run if they don't match).
( cd assets
  mkdir installer
  cd installer

  # upstream release a 2.2.8 followed by a 229, handle either.
  ZIPFILE="$CWD/SRB2-v$VERSION-Full.zip"
  [ -e "$ZIPFILE" ] || ZIPFILE="$CWD/SRB2-v${VERSION//.}-Full.zip"
  unzip "$ZIPFILE" '*.dta' '*.pk3'
)

# As shipped, the path /usr/games/SRB2 is hardcoded in various places
# in the source (no cmake variable to change it). It should be in
# /usr/share/games, not /usr/games, so sed-fest:
sed -i 's,usr/games,usr/share/games,g' \
       src/sdl/i_system.c src/sdl/i_ttf.c

# 20230714 bkw: cmake silliness. it wants to download Ccache.cmake to
# support ccache on Linux. on Windows, it seems to support ccache
# without external dependency... and it turns out, this support works
# on Linux as well. So:
sed -i '/CMAKE_HOST_SYSTEM_NAME/s,STREQ.*,MATCHES Linux),' CMakeLists.txt

mkdir -p build
cd build
  cmake \
    -DCMAKE_C_FLAGS_RELEASE:STRING="$SLKCFLAGS -DNDEBUG" \
    -DCMAKE_CXX_FLAGS_RELEASE:STRING="$SLKCFLAGS -DNDEBUG" \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DLIB_SUFFIX=${LIBDIRSUFFIX} \
    -DMAN_INSTALL_DIR=/usr/man \
    -DUSE_CCACHE=ON \
    -DCMAKE_BUILD_TYPE=Release ..
  make VERBOSE=1
  #make install/strip DESTDIR=$PKG # don't bother, it's broken
cd ..

# 'make install' puts all the files in the same dir, so manual install:
mkdir -p $PKG/usr/games $PKG/usr/share/games/SRB2 \
         $PKG/usr/share/pixmaps $PKG/usr/share/applications \
         $PKG/usr/doc/$PRGNAM-$VERSION
# as of 2.2.8 the binary's name changed.
# 20230714 bkw: ...and it changed again in 2.2.11.
[ -x build/bin/lsdl$PRGNAM-$VERSION ] || mv build/bin/lsdl$PRGNAM build/bin/lsdl$PRGNAM-$VERSION
install -s -m0755 build/bin/lsdl$PRGNAM-$VERSION $PKG/usr/games
ln -s lsdl$PRGNAM-$VERSION $PKG/usr/games/lsdl$PRGNAM
ln -s lsdl$PRGNAM-$VERSION $PKG/usr/games/$PRGNAM
install -m0644 assets/LICENSE* assets/README* $PKG/usr/doc/$PRGNAM-$VERSION

hicolor=$PKG/usr/share/icons/hicolor
for px in 16 22 32 48 64 128 256; do
  sz=${px}x${px}
  dir=$hicolor/$sz/apps
  mkdir -p $dir
  convert -resize $sz $PRGNAM.png $dir/$PRGNAM.png
done

ln -s ../icons/hicolor/48x48/apps/$PRGNAM.png $PKG/usr/share/pixmaps/$PRGNAM.png

echo -n "Copying data files: "
( cd assets/installer
  for i in *; do
    echo -n "$i "
    cat $i > $PKG/usr/share/games/SRB2/$i
  done
)
echo

# desktop file is a modified version of debian/srb2.desktop. I fixed
# the absolute paths and got it to validate.
cat $CWD/$PRGNAM.desktop > $PKG/usr/share/applications/$PRGNAM.desktop

# dev and modding docs in doc/, config files for cwiid and various doom
# level editors in extras/. We don't need yet another copy of the GPL
# in doc/, so:
rm -f doc/.gitignore doc/copying
cp -a doc extras $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$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