#!/bin/bash

# Slackware build script for openvaf-bin

# Copyright 2026 A. Tomasini
# 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.

# OpenVAF is distributed by upstream only as a precompiled, statically linked
# x86_64 executable (the build requires LLVM 15, which is not part of
# Slackware 15.0).  This script therefore repackages the official binary rather
# than compiling from source.

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

PRGNAM=openvaf-bin
SRCNAM=openvaf
VERSION=${VERSION:-23.5.0}
SRCVER=${SRCVER:-23_5_0}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

if [ -z "$ARCH" ]; then
  ARCH=$( uname -m )
fi

if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

if [ "$ARCH" != "x86_64" ]; then
  printf "\n$ARCH is not supported: openvaf is a precompiled x86_64 binary.\n\n"
  exit 1
fi

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

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT

# The upstream tarball holds a single 'openvaf' executable with no top-level
# directory, so unpack it into a build directory we create.
rm -rf $TMP/$PRGNAM-$VERSION
mkdir -p $TMP/$PRGNAM-$VERSION
cd $TMP/$PRGNAM-$VERSION
tar xvf $CWD/${SRCNAM}_${SRCVER}_linux_amd64.tar.gz
chown -R root:root .

install -D -m 0755 openvaf $PKG/usr/bin/openvaf

# The upstream binary ships unstripped (~210 MB); strip it to shrink the
# package.  strip only removes debug/symbol data, the compiler still runs.
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
cat $CWD/$PRGNAM.SlackBuild > $PKGDOC/$PRGNAM.SlackBuild
[ -f $CWD/README ] && cat $CWD/README > $PKGDOC/README

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