#!/bin/bash

# Slackware build script for gprolog
# Written by Eugene Suter (easuter@gmail.com)
# Updated by Erik Falor (ewfalor@gmail.com) for version 1.4.5
# Copyright 2020

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

PRGNAM=gprolog
VERSION=${VERSION:-1.5.0}
BUILD=${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 the variable PRINT_PACKAGE_NAME is set, then this script will report what
# the name of the created package would be, and then exit. This information
# could be useful to other scripts.
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 [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
cd $PRGNAM-$VERSION
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 {} \;

# gprolog seems to ignore the default SlackBuild configure options
# and installs itself into $prefix/gprolog-$VERSION
# So build it with only these two flags for now
cd src

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --build=$ARCH-slackware-linux

make -j1
make install DESTDIR=$PKG

# Correct gprolog's installation dirs
rm -rf $PKG/usr/bin # Only symlinks in here
mv $PKG/usr/$PRGNAM-$VERSION/bin $PKG/usr/
mv $PKG/usr/$PRGNAM-$VERSION/lib $PKG/usr/lib$LIBDIRSUFFIX
rm $PKG/usr/lib$LIBDIRSUFFIX/*.o
mkdir $PKG/usr/doc
mv $PKG/usr/$PRGNAM-$VERSION/doc $PKG/usr/doc/$PRGNAM-$VERSION/
mv $PKG/usr/$PRGNAM-$VERSION/examples* $PKG/usr/doc/$PRGNAM-$VERSION/
mv $PKG/usr/$PRGNAM-$VERSION/include $PKG/usr/

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

mv $PKG/usr/$PRGNAM-$VERSION/{ChangeLog,COPYING,NEWS} \
   $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

rm -rf $PKG/usr/$PRGNAM-$VERSION
mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

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