#!/bin/bash

# Copyright 2025, Lockywolf
# 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=demagnetize-rs-bin
VERSION=${VERSION:-0.6.1}
BUILD=${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

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

if [ "$ARCH" = "i586" ]; then
  LIBDIRSUFFIX=""
  UNSUP=1
elif [ "$ARCH" = "i686" ]; then
  LIBDIRSUFFIX=""
  UNSUP=1
elif [ "$ARCH" = "x86_64" ]; then
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "aarch64" ]; then
  LIBDIRSUFFIX="64"
  UNSUP=1
else
  LIBDIRSUFFIX=""
  UNSUP=1
fi

if [[ "$UNSUP" == 1 ]] ; then
  printf "Unsupported architecture: unknown.\n" 1>&2
fi

set -e

TARNAM="${PRGNAM%-rs-bin}"

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
mkdir $PRGNAM-$VERSION
cd $PRGNAM-$VERSION
tar xvf $CWD/$TARNAM-$ARCH-unknown-linux-gnu.tar.*z*

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 \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} +

# Unpack the archive to /opt/
install -d -m755 $PKG/opt
install -d -m755 $PKG/opt/$PRGNAM-$VERSION
mv $TARNAM-$ARCH-unknown-linux-gnu/$TARNAM $PKG/opt/$PRGNAM-$VERSION/

mkdir -p "$PKG"/usr/bin
(
    cd $PKG/usr/bin
    ln -sr ../../opt/${PRGNAM}-${VERSION}/${TARNAM} ./
)

PKGOPT=$PKG/opt/${TARNAM}-${VERSION}-${ARCH}

tar xvf $CWD/source.tar.gz

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a \
  $TARNAM-$VERSION/README.md \
  $PKG/usr/doc/$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

if [[ "${PRGNAM: -4}" != "-bin" ]] ; then
  printf "Fatal Error: PRGNAM must end in '-bin', but now ends with %s\n" \
         "${PRGNAM: -4}"
  exit 2
fi

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE