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#!/bin/bash

# Slackware build script for gaiasky

# Copyright 2023 Giancarlo Dessì, Cagliari, IT
# Based on Booktab.SlackBuild written by Matteo Bernardini
# at https://ponce.cc/slackware/testing/Booktab/ 
# 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.

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

PRGNAM=gaiasky
VERSION=${VERSION:-"3.5.7"}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

SRCVERSION=$( echo ${VERSION//./_} )

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 [ "$ARCH" = "x86_64" ]; then
  SRCARCH="x86-64"
  PKGARCH="$ARCH"
elif [ "$ARCH" = "arm" ]; then
  printf "\n$ARCH is unsupported for gaiasky...\n\n"
  exit 1
else
  SRCARCH="x86"
  PKGARCH="i586"
fi

set -e

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

#Extract the application from the Ubuntu package
ar xv $CWD/${PRGNAM}_linux_$SRCVERSION.deb data.tar.gz
tar xvf data.tar.gz -C $TMP/$PRGNAM-$VERSION
rm -f data.tar.gz

cd $TMP/$PRGNAM-$VERSION

# patch the application entry: as is provided it won't work 
# in Slackware/KDE
patch -p0 << 'EOF'
--- opt/gaiasky/gaiasky.desktop	2023-04-05 16:00:00.000000000 +0200
+++ opt/gaiasky/gaiasky.desktop	2023-04-05 16:00:01.000000000 +0200
@@ -3,6 +3,8 @@
 Name=Gaia Sky
 Comment=3D universe simulator for desktop and VR with support for more than a billion objects
-Exec=gaiasky
+Exec=/opt/gaiasky/gaiasky
+GenericName=Desktop 3D universe viewer
 Icon=/opt/gaiasky/gs_icon.svg
 Terminal=false
-Categories=Science;
+Categories=Education;Science;Astronomy;
+StartupNotify=true

EOF

chown -R root:root .

# The application will be installed in /opt but some files will be moved or 
# linked in /usr according to the standard of Slackware installations
mkdir -p usr/share/applications
mkdir -p usr/doc/$PRGNAM-$VERSION
mkdir -p usr/bin

# link the executable in /usr/bin
cd usr/bin
ln -s ../../opt/gaiasky/gaiasky gaiasky
cd ../../

# link the application desktop entry
cp -a opt/gaiasky/gaiasky.desktop usr/share/applications/gaiasky.desktop

# move the entire tree in package-gaiasky
cp -a * $PKG/

# strip ELF objects
find $PKG/opt/gaiasky -type f -print0  | \
  xargs -0 file -m /etc/file/magic/elf | \
  grep 'ELF.*dynamic.*not stripped'    | \
  cut -d: -f1 | xargs strip

chmod 755 $PKG/opt/gaiasky/jre/lib/*.so
chmod 755 $PKG/opt/gaiasky/jre/lib/server/*.so

# move some documentation files in /usr/doc/gaiasky-x.y.z
mv opt/gaiasky/*.md opt/gaiasky/releasenotes.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