#!/bin/bash

# Slackware build script for VICE

# Copyright 2008 Mauro Giachero (email removed)
# Copyright 2020 B. Watson (yalhcru@gmail.com)
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ''AS IS'' AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# 20200801 bkw:
# - Take over maintenance
# - Autodetect ffmpeg
# - Allow building with SDL 1.x
# - Allow building without pulseaudio
# - Get rid of xa dep
# - Install TTF fonts in correct place, get rid of other formats
# - install-info in doinst.sh so vice.info shows up in the info dir
# - Have slack-desc show build options
# - Re-enable the old x64 emulator
# - BUILD=3

PRGNAM=vice
VERSION=${VERSION:-3.4}
BUILD=${BUILD:-3}
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" = "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 -pipe"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

set -e

# The "--enable-shared-ffmpeg" option creates conflicts with external
# ffmpeg libraries, so we don't use it here. Static would be OK, but
# it won't build, so it's not an option for now either: I don't care
# enough about it to spend any more time trying to fix it. If you do
# care, come up with a way to build with --enable-static-ffmpeg, send
# me a patch, and I'll include it here.

[ -x /usr/bin/ffmpeg ] && ffmpeg="--enable-external-ffmpeg"

SDL="${SDL:-auto}"
if [ "$SDL" = "auto" ]; then
  SDL=1
  pkg-config --exists sdl2 && SDL=2
fi

case "$SDL" in
  1)   sdlopt="--enable-sdlui"  ;;
  2)   sdlopt="--enable-sdlui2" ;;
  *)   echo -e "$( basename $0 ):" \
               "invalid SDL option '$SDL'." \
               "Valid options are:\n  auto 1 2" \
               1>&2
       exit 1 ;;
esac

# Anticipating 15.0's pure-alsa-system
if [ "${PULSE:-yes}" != "yes" ]; then
  pulseopt="--without-pulse"
fi

echo "=== sdlopt '$sdlopt', ffmpeg '$ffmpeg', pulseopt '$pulseopt'"

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

# Set proper paths in documentation.
sed -i "s/\/usr\/local\/lib\//\/usr\/lib${LIBDIRSUFFIX}\//g" \
  man/vice.1
sed -i 's/"\/vice_toc\.html"/"\/html\/vice_toc\.html"/g' \
  src/arch/gtk3/uicommands.c
sed -i "s/\/usr\/local/\/usr/g" doc/vice.* doc/html/*html
sed -i "s/\/usr\/lib\//\/usr\/lib${LIBDIRSUFFIX}\//g" doc/vice.* doc/html/*html

# Avoid the need for xa. It's only used to generate a small C header
# file, which we include a prebuilt version of here. There's nothing
# dynamic about this header, it's just a small chunk of 6502 object
# code as a C array, and for a given version of vice it'll always be
# the same code.
cat $CWD/psiddrv.h.prebuilt.$VERSION > src/c64/psiddrv.h

autoreconf -vif

DOCDIR=/usr/doc/$PRGNAM-$VERSION
PKGDOC=$PKG/$DOCDIR

CFLAGS="$SLKCFLAGS -w -Wl,--allow-multiple-definition" \
CXXFLAGS="$SLKCFLAGS" \
XA=/bin/true \
./configure \
  $sdlopt \
  $ffmpeg \
  $pulseopt \
  --enable-x64 \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --mandir=/usr/man \
  --infodir=/usr/info \
  --docdir=$DOCDIR \
  --with-x \
  --enable-quicktime \
  --enable-ethernet \
  --enable-parsid \
  --enable-cpuhistory \
  --build=$ARCH-slackware-linux

make
make install-strip DESTDIR=$PKG
rm -f $PKG/usr/info/dir
gzip -9 $PKG/usr/man/man?/*.?  $PKG/usr/info/*

mkdir -p $PKG/usr/share/{applications,pixmaps}
install -D -m 0644 $CWD/config/*.desktop $PKG/usr/share/applications
install -D -m 0644 $CWD/config/vice.png $PKG/usr/share/pixmaps

# Move the docs to the Slackware standard place, symlink to where vice
# expects it to be.
mkdir -p $PKGDOC
mv $PKG/usr/lib$LIBDIRSUFFIX/$PRGNAM/doc/* $PKGDOC
( cd $PKGDOC
  chmod 644 *
  mkdir html
  mv *.html *.png *.gif *.css html/ )
( cd $PKG/usr/lib$LIBDIRSUFFIX/$PRGNAM
  rmdir doc
  ln -s $DOCDIR doc )

# 20200728 bkw: when I inherited this build, it was installing the
# fonts to the doc dir (where they can't be used), but updating
# the font cache in doinst.sh. I'm not so sure the fonts are
# really necessary, but in case they are, I've moved them to
# /usr/share/fonts/TTF (and gotten rid of the non-TTF ones).
mkdir -p $PKG/usr/share/fonts/TTF
mv $PKGDOC/*.ttf $PKG/usr/share/fonts/TTF
rm -f $PKGDOC/Lato-*

# This would install Commodore font where other software can use it.
# However, the characters in the font are in PETSCII order, not ASCII
# or Unicode, so it's not all that useful.
#ln -s ../../../lib$LIBDIRSUFFIX/$PRGNAM/common/CBM.ttf $PKG/usr/share/fonts/TTF

cp -a AUTHORS ChangeLog COPYING FEEDBACK NEWS README $PKGDOC
cat $CWD/$PRGNAM.SlackBuild > $PKGDOC/$PRGNAM.SlackBuild

# Make the slack-desc reflect the build options.
FF=no; SDL=1.2; PA=no

# We can't use ldd to detect whether ffmpeg is built in since it
# gets loaded with dlopen(). Hence this stuff:
grep -q '^#define USE_SDLUI2\>'  src/config.h && SDL=2.0
grep -q '^#define HAVE_FFMPEG\>' src/config.h && FF=yes
grep -q '^#define USE_PULSE\>'   src/config.h && PA=yes

mkdir -p $PKG/install
sed -e "s,@FF@,$FF," \
    -e "s,@PA@,$PA," \
    -e "s,@SDL@,$SDL," \
 $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}