#!/bin/sh

# Slackware build script for kegs

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

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

# 20150621 bkw: bump BUILD to 2
# - fix link to GS/OS images in README
# - split up huge README, move most of it to README.Slackware
# - add allow_sound_open_fail.diff
# - add instructions on getting OSS audio to work on modern Slack
# - "Exec=aoss xkegs" in .desktop file

PRGNAM=kegs
VERSION=${VERSION:-0.91}
BUILD=${BUILD:-2}
TAG=${TAG:-_SBo}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i486 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

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

if [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
else
  SLKCFLAGS="-O2"
fi

set -e

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 .
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 {} \;

# xkegs refuses to close (close button greyed-out by window manager).
# Small patch by SlackBuild author fixes this large annoyance (which is
# extra-annoying because there's also no Quit option in the kegs menu).
# I've sent this upstream, maybe it'll get integrated in future versions.
patch -p1 < $CWD/allow_window_close.diff

# Matthew Miller pointed out this patch to me. Since kegs uses OSS for
# audio, and modern Slackware has ALSA OSS emulation disabled by default,
# sound won't work unless xkegs is run via aoss, or OSS modules are
# loaded. This patch allows the emulator to start with sound disabled if
# it can't open the OSS audio device (instead of it being a fatal error).
# I've also updated the README to explain how to get audio to work.
patch -p1 < $CWD/allow_sound_open_fail.diff

cd src
rm -f vars
ln -s vars_x86linux vars
make CCOPTS="$SLKCFLAGS" x$PRGNAM to_pro partls
cd -

# No install target, just stick it all where it goes.
# The icon was converted from the Mac OSX icon with icns2png.
# The .desktop has 'Terminal=true' because xkegs *really* wants
# to be started from a terminal (the debugger uses stdio, and
# is too easy to accidentally enter by center-clicking the window).

mkdir -p \
  $PKG/usr/bin \
  $PKG/usr/libexec \
  $PKG/usr/share/pixmaps \
  $PKG/usr/share/applications \
  $PKG/usr/share/$PRGNAM \
  $PKG/usr/man/man1
install -s -m0755 x$PRGNAM $PKG/usr/libexec/
install -s -m0755 src/to_pro src/partls $PKG/usr/bin/
install -m0755 $CWD/x$PRGNAM.sh $PKG/usr/bin/x$PRGNAM
install -m0644 $CWD/$PRGNAM.png $PKG/usr/share/pixmaps/
install -m0644 $CWD/$PRGNAM.desktop $PKG/usr/share/applications/

# Man pages are specific to the SlackBuild, though I've sent
# them upstream for consideration.
for file in $CWD/*.1; do
  sed "s/@VERSION@/$VERSION/g" $file \
  | gzip -9c \
  > $PKG/usr/man/man1/$( basename $file ).gz
done

# Half the supplied documentation refers to it as "kegs" and
# the other half calls it "xkegs". To avoid confusion:
ln -s x$PRGNAM.1.gz $PKG/usr/man/man1/$PRGNAM.1.gz
ln -s x$PRGNAM $PKG/usr/bin/$PRGNAM

# Handle the ROM image, if we find it. Filenames are listed in
# reverse order of preference.
for file in ROM01 rom01 ROM03 rom03; do
  if [ -e "$CWD/$file" ]; then
    ROMFILE="$CWD/$file"
  fi
done

if [ -e "$ROMFILE" ]; then
  ROMNAME="$( basename "$ROMFILE" )"
  install -m0644 "$ROMFILE" $PKG/usr/share/$PRGNAM
else
  # We don't have a ROM, so we don't include one in the package, but we
  # do still set the path to /usr/share/kegs/rom03 in the config file,
  # so all the user has to do is copy the ROM there later.
  ROMNAME=rom03
fi

sed "s,@ROM@,/usr/share/$PRGNAM/$ROMNAME," \
  < $CWD/config.$PRGNAM.default \
  > $PKG/usr/share/$PRGNAM/config.$PRGNAM.default

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
install -m0644 *.txt $PKG/usr/doc/$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:-tgz}