#!/bin/bash

# Slackware build script for signal-desktop

# Copyright 2022-2026 Gregory J. L. Tourte, Frome, Somerset, U.K.
# Copyright 2018 David O'Shaughnessy
# 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=signal-desktop
VERSION=${VERSION:-8.28.0}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

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

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

# Upstream only has binary support for x86_64 at present.
if [ "$ARCH" = "x86_64" ]; then
    DEBARCH="amd64"
else
    echo "Sorry, the Signal binary is currently available for x86_64 only."
    exit 1
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $PKG
ar p $CWD/${PRGNAM}_${VERSION}_$DEBARCH.deb data.tar.xz | tar xJv
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 {} +

GLIBC_VERSION=$(getconf GNU_LIBC_VERSION|awk '{print $2}')
if (( $( echo "$GLIBC_VERSION < 2.34" | bc -l ) )); then
  tar -C opt/Signal/ -xvf $CWD/aaa_glibc-solibs-2.42-x86_64-1_slack15.0.txz lib64 usr 
  ( cd opt/Signal/lib64/incoming
    for f in *.so; do
      s=$(readelf -d "$f" 2>/dev/null | sed -n 's/.*SONAME.*\[\(.*\)\]/\1/p')
      [ -n "$s" ] && [ "$s" != "$f" ] && ln -sf "$f" "$s"
    done
    [ -e libc.so.6 ]
    [ -e ld-linux-x86-64.so.2 ]
  )

  # Point the Electron binary at the bundled loader.  Last thing touched before
  # makepkg: strip rewrites the ELF and can drop the dynamic entries, so this
  # has to come after it.  --force-rpath writes DT_RPATH instead of DT_RUNPATH,
  # which is what makes the path apply to the dlopened *.node addons as well.
  patchelf --set-interpreter \
    /opt/Signal/lib64/incoming/ld-linux-x86-64.so.2 \
    --force-rpath --set-rpath \
    /opt/Signal/lib64/incoming:/opt/Signal \
    $PKG/opt/Signal/$PRGNAM

  mkdir -p $PKG/usr/bin
  install -m 755 $CWD/Signal.sh $PKG/usr/bin/$PRGNAM
  sed -i 's?opt/Signal?usr/bin?' $PKG/usr/share/applications/signal-desktop.desktop
else
  # create soft link for launcher
  mkdir -p $PKG/usr/bin
  ln -sf ../../opt/Signal/$PRGNAM $PKG/usr/bin/$PRGNAM
fi

find $PKG -print0 | xargs -0 file | grep -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs chmod a+x 2> /dev/null || true

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp $PKG/usr/share/doc/$PRGNAM/* $PKG/opt/Signal/LICENSE* $PKG/usr/doc/$PRGNAM-$VERSION
rm -rf $PKG/usr/share/doc
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 --remove-tmp-rpaths -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE