#!/bin/bash

# Slackware build script for tailscale

# Copyright 2023-2026 Andrew Payne <phalange@komputermatrix.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.

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

PRGNAM=tailscale
DAEMON=tailscaled
VERSION=${VERSION:-1.104.1}
ARCHSTR=amd64
BINDIR=$PRGNAM"_"$VERSION"_"$ARCHSTR
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}

# Abort build if architecture is not 64-bit.
if [ "$ARCH" != "x86_64" ]; then
  echo "$ARCH is not supported."
  exit 1
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
mkdir -p $PRGNAM-$VERSION
cd $PRGNAM-$VERSION
tar -xf $CWD/$BINDIR.tgz
tar -xf $CWD/$PRGNAM-$VERSION.tar.gz

chown -R root:root .
find . ! -type l    -a \( \
  \(     -perm /111 -a ! -perm 755 -a -exec chmod -f 755 {} + \) -o \
  \(   ! -perm /111 -a ! -perm 644 -a -exec chmod -f 644 {} + \) \)

mkdir -p $PKG/etc/default/$DAEMON
cp -a $TMP/$PRGNAM-$VERSION/$BINDIR/systemd/$DAEMON.defaults $PKG/etc/default/$DAEMON/

mkdir -p $PKG/lib/systemd/system
cp -a $TMP/$PRGNAM-$VERSION/$BINDIR/systemd/$DAEMON.service $PKG/lib/systemd/system/

mkdir -p $PKG/opt/$PRGNAM
cp -a $TMP/$PRGNAM-$VERSION/$BINDIR/$DAEMON $PKG/opt/$PRGNAM/

mkdir -p $PKG/usr/{bin,sbin}
ln -s /opt/$PRGNAM/$DAEMON $PKG/usr/sbin/$DAEMON
cp -a $TMP/$PRGNAM-$VERSION/$BINDIR/$PRGNAM $PKG/opt/$PRGNAM/
ln -s /opt/$PRGNAM/$PRGNAM $PKG/usr/bin/$PRGNAM

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

PKGDOC=$PKG/usr/doc/$PRGNAM-$VERSION
mkdir -p $PKGDOC
cp -a \
  $PRGNAM-$VERSION/{CODE_OF_CONDUCT.md,LICENSE,PATENTS,README.md,SECURITY.md} \
  $PKGDOC
cat $CWD/$PRGNAM.SlackBuild > $PKGDOC/$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