#!/bin/bash

# Slackware build script for 86box

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

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

# Notes:

# Version 4.x used to write the config file to the current directory.
# Starting with 5.0, it stores configs in ~/.config/86box.

# We now have rtmidi in the repo. The build doesn't autodetect it and
# disable it if it's missing, we have to help it out with -DRTMIDI=OFF
# if needed. It's OK, it'll use FluidSynth for MIDI playback if there's
# no rtmidi.

# The linbox-qt5 frontend, despite its name, seems to require qt6 (pyside6).
# The sl86 fronend looks too simple to be useful.
# The other frontends are mac/windows only.
# Anyway, it has a nice Qt GUI, I don't see why it needs a frontend.

# 20250829 bkw: update for v5.0.
# 20240925 bkw: update for v4.2.1.
# 20240812 bkw: update for v4.2.
# 20240311 bkw: update for v4.1.
# - submitted a build for rtmidi, so it's now supported here as an
#   optional dep.

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

PRGNAM=86box
SRCNAM=86Box
VERSION=${VERSION:-5.0}
BUILD=${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

# 20250829 bkw: Starting with version 5.0, SSE2 is required at
# runtime, for x86 and x86_64. If we're somehow building on an ancient
# CPU that lacks SSE2, warn the user, but don't stop the build.
# There is probably a way to patch it to build without SSE2 on x86,
# but I'm not spending a lot of time to figure it out because I doubt
# anyone really needs it.
check_sse2() {
  grep -q '\<sse2\>' /proc/cpuinfo && return
  cat <<EOF

********************************************************************
* WARNING: 86box requires SSE2 extensions, but you are building on a
* system without SSE2. If you install the resulting package on this
* system, it will fail with "Illegal Instruction" errors.
*
* Press ^C within 5 seconds to abort the build, or wait 5 seconds to
* continue.
********************************************************************

EOF
  sleep 5
}

TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686 -msse2"
  check_sse2
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686 -msse2"
  check_sse2
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 $SRCNAM-$VERSION
tar xvf $CWD/$SRCNAM-$VERSION.tar.gz
cd $SRCNAM-$VERSION
tar xvf $CWD/roms-$VERSION.tar.gz
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 {} +

# 20240311 bkw: rtmidi still not autodetected in 4.1.
# 20250829 bkw: or 5.0 either.
if [ "${RTMIDI:-yes}" != "yes" ] || ! pkg-config --exists rtmidi; then
  RTMIDI="-DRTMIDI=OFF"
fi

mkdir -p build
cd build
  cmake \
    $RTMIDI \
    -DCMAKE_C_FLAGS="$SLKCFLAGS" \
    -DCMAKE_CXX_FLAGS="$SLKCFLAGS" \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DCMAKE_BUILD_TYPE=Release ..
  make
  make install/strip DESTDIR=$PKG
cd ..

# Allow running "86box", lowercase B, to match the package name.
ln -s $SRCNAM $PKG/usr/bin/$PRGNAM

# This mv will be fast, src and dest are always on the same FS.
mkdir -p $PKG/usr/share/$SRCNAM
mv roms-$VERSION $PKG/usr/share/$SRCNAM/roms

# Upstream ships desktop/icons, but 'make install' doesn't install them.
mkdir -p $PKG/usr/share/applications
cp -a src/unix/assets/net.86box.86Box.desktop $PKG/usr/share/applications

mkdir -p $PKG/usr/share/metainfo
cp -a src/unix/assets/net.86box.86Box.metainfo.xml $PKG/usr/share/metainfo

for i in src/unix/assets/[0-9]*x*/; do
  dir=$PKG/usr/share/icons/hicolor/$( basename $i )/apps
  mkdir -p $dir
  cp -a $i/*.png $dir
done

mkdir -p $PKG/usr/share/pixmaps
ln -s ../icons/hicolor/48x48/apps/net.86box.86Box.png \
      $PKG/usr/share/pixmaps/$PRGNAM.png

# Make the slack-desc show whether optional rtmidi support is built in.
WITH=WITHOUT
objdump -p $PKG/usr/bin/$PRGNAM | grep -q 'NEEDED.*librtmidi' && WITH="WITH"

PKGDOC=$PKG/usr/doc/$PRGNAM-$VERSION
mkdir -p $PKGDOC
cp -a AUTHORS COPYING *.md $PKGDOC
cat $CWD/$PRGNAM.SlackBuild > $PKGDOC/$PRGNAM.SlackBuild

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