#!/bin/sh

# Slackware build script for commandergenius

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

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

# 20170301 bkw:
# - updated for 1.9.8.7beta
# - fix the build for the case where SDL2 is installed but SDL2_image is not.
# - update man page (level= option, correct author's full name)
# - use github long-form URL

# 20170122 bkw: updated for 1.9.8.1beta.

PRGNAM=commandergenius
VERSION=${VERSION:-1.9.8.7beta}
BUILD=${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}

# note that upstream has -O3 hardcoded *after* the specified flags,
# so the -O2 here doesn't actually do anything. The -fPIC and arch/tune
# stuff still applies though.
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

# I wish upstream would pick a name and stick with it... they also use
# ~/.CommanderGenius for user data, and their README mentions CGenius.
SRCNAM="Commander-Genius"
EXENAME="CGeniusExe"
DESKTOP="cgenius.desktop"

# the real VERSION is from version.h in the source. the tarball names
# omit the dots.
SRCVER="$( echo $VERSION | sed 's,\.,,g' )"

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

# permissions are blethcherous, please don't revert to template here.
find -L . -type f -a -exec chmod 644 '{}' '+'
find -L . -type d -a -exec chmod 755 '{}' '+'

# placate desktop-file-validate
sed -i 's,Application;,,' share/$DESKTOP

# Apply upstream fix for building with SDL-1.2
patch -p1 < $CWD/a67003b_sdl_12_compatibility.diff

# SDL 2 is optional. I prefer it, others may not.
SDLOPT="-DUSE_SDL2=no"
SDLVER=1
if pkg-config --exists sdl2 SDL2_image && [ "${SDL2:-yes}" != "no" ]; then
  SDLOPT="-DUSE_SDL2=yes"
  SDLVER=2
fi

echo "=== Building with $SDLOPT"

mkdir -p build
cd build
  cmake \
    $SDLOPT \
    -DGAMES_SHAREDIR:STRING=/usr/share/games \
    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DLIB_SUFFIX=${LIBDIRSUFFIX} \
    -DMAN_INSTALL_DIR=/usr/man \
    -DCMAKE_BUILD_TYPE=Release ..
  make VERBOSE=1
  make install/strip DESTDIR=$PKG
cd ..

# upstream installs 2 identical-looking (but not byte-identical) icons
rm -f $PKG/usr/share/icons/hicolor/512x512/apps/CGLogo.png
ln -s ../../../../games/$PRGNAM/cglogo512.png \
      $PKG/usr/share/icons/hicolor/512x512/apps/CGLogo.png

# grrrr. don't force command-line users to remember the name is CGeniusExe
ln -s $EXENAME $PKG/usr/games/$PRGNAM

# the High Quality Pack. this is redundant for Keen 1 and 4 (just download
# the Special versions of these games), so we only install the data for
# 2 and 3. strace shows the files are being loaded, but TBH I haven't
# played these games enough to notice the difference with/without the HQP.
rm -rf hqp/games/keen1 hqp/games/keen4
cp -a hqp/* $PKG/usr/share/games/$PRGNAM

# man page written for this SlackBuild.
mkdir -p $PKG/usr/man/man6
gzip -9c < $CWD/$PRGNAM.6 > $PKG/usr/man/man6/$PRGNAM.6.gz
ln -s $PRGNAM.6.gz $PKG/usr/man/man6/$EXENAME.6.gz

# upstream installs most of the docs in /usr/share/games/$PRGNAM...
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a COPYRIGHT $PKG/usr/doc/$PRGNAM-$VERSION
for i in README changelog.txt Readme_hqp.txt; do
  ln -s ../../share/games/$PRGNAM/$i $PKG/usr/doc/$PRGNAM-$VERSION
done
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
sed "s,@SDLVER@,$SDLVER," < $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}