#!/bin/sh

# Slackware build script for Lua

# Written by Menno Duursma
# Modified by the SlackBuilds.org project
# Modified by Aaron W. Hsu
# Updated by Matteo Bernardini
# Modified by Rafael Tavares <mdrafaeltavares@gmail.com> for gfs (2021)

# This program is free software. It comes without any warranty.
# Granted WTFPL, Version 2, as published by Sam Hocevar. See
# http://sam.zoy.org/wtfpl/COPYING for more details.

PRGNAM=$(basename $0 | cut -f1 -d.)
VERSION=${VERSION:-$(find . -maxdepth 1 -name "$PRGNAM-*.tar.?z*" | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-1}
TAG=${TAG:-_gfs}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i486 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${TMP:-/tmp/gfs}
PKG=$TMP/pkg-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}
JOBS=${JOBS:-" -j$(expr $(getconf _NPROCESSORS_ONLN) \* 2 ) "}

if [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
fi

set -e

UMASKBKP=$(umask)
umask 0022

DEPCHK=""
OPTDEP=""

if [ -z $VERSION ]
 then
 VERSION=5.1.5
fi

MDSCHK=2e115fe26e435e33b0d5c022e4490567
DWNLCMD=${DWNLCMD:-"wget -c --no-check-certificate"}
SRCDOWN=${SRCDOWN:-"http://www.lua.org/ftp/lua-$VERSION.tar.gz"}

if [ -z $(find . -maxdepth 1 -name "$PRGNAM-$VERSION.tar.?z*") ]
then
 $DWNLCMD $SRCDOWN
else
 if md5sum -c <<<"$MDSCHK $(echo $PRGNAM-$VERSION.tar.?z*)";
  then
   continue
  else
   rm -rf $PRGNAM-$VERSION.tar.?z*
   $DWNLCMD $SRCDOWN
 fi
fi

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 .

# Fix up a to-be-installed header and the pkgconfig file
sed -i "s|/usr/local|/usr|" src/luaconf.h
sed -i "s|lib/lua|lib$LIBDIRSUFFIX/lua|" src/luaconf.h
sed -i "s|/usr/local|/usr|" etc/lua.pc
sed -i "s|prefix}/lib|prefix}/lib${LIBDIRSUFFIX}|g" etc/lua.pc

make $JOBS linux \
  CFLAGS="$SLKCFLAGS \$(MYCFLAGS)" \
  INSTALL_TOP=/usr \
  INSTALL_LIB=/usr/lib${LIBDIRSUFFIX} \
  INSTALL_LMOD=/usr/share/lua/5.1 \
  INSTALL_CMOD=/usr/lib${LIBDIRSUFFIX}/lua/5.1

make linux install \
  CFLAGS="$SLKCFLAGS \$(MYCFLAGS)" \
  INSTALL_TOP=$PKG/usr \
  INSTALL_LIB=$PKG/usr/lib${LIBDIRSUFFIX} \
  INSTALL_LMOD=$PKG/usr/share/lua/5.1 \
  INSTALL_CMOD=$PKG/usr/lib${LIBDIRSUFFIX}/lua/5.1

# Now let's build the shared library
mkdir -p shared
cd shared
  ar -x $PKG/usr/lib${LIBDIRSUFFIX}/liblua.a
  gcc -ldl -lreadline -lhistory -lncurses -lm -shared *.o -o liblua.so.$VERSION
  cp -a liblua.so.$VERSION $PKG/usr/lib${LIBDIRSUFFIX}
  ( cd $PKG/usr/lib${LIBDIRSUFFIX}
    ln -s liblua.so.$VERSION liblua.so.5.1
    ln -s liblua.so.$VERSION liblua.so.5
    ln -s liblua.so.$VERSION liblua.so
  )
cd ..

# and install the pkgconfig file
mkdir -p $PKG/usr/lib${LIBDIRSUFFIX}/pkgconfig
cat etc/lua.pc > $PKG/usr/lib${LIBDIRSUFFIX}/pkgconfig/lua.pc

#cat etc/lua.pc > $PKG/usr/lib${LIBDIRSUFFIX}/pkgconfig/lua51.pc
#sed -i 's/-llua/-llua${V}/g' $PKG/usr/lib${LIBDIRSUFFIX}/pkgconfig/lua51.pc
#ln -s /usr/lib${LIBDIRSUFFIX}/pkgconfig/lua51.pc $PKG/usr/lib${LIBDIRSUFFIX}/pkgconfig/lua5.1.pc
#ln -s /usr/lib${LIBDIRSUFFIX}/pkgconfig/lua51.pc $PKG/usr/lib${LIBDIRSUFFIX}/pkgconfig/lua-5.1.pc

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

find $PKG/usr/man -type f -exec gzip -9 {} \;
for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION/{extras,html}
cp -a COPYRIGHT HISTORY INSTALL README $PKG/usr/doc/$PRGNAM-$VERSION
cp -a doc/*.html doc/logo.gif doc/lua.css $PKG/usr/doc/$PRGNAM-$VERSION/html
cp -a etc test $PKG/usr/doc/$PRGNAM-$VERSION/extras
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
#      |-----handy-ruler------------------------------------------------------|
cat <<EOT >$PKG/install/slack-desc
$PRGNAM: lua (a powerful, fast, light-weight, embeddable scripting language)
$PRGNAM:
$PRGNAM: Lua combines simple procedural syntax with powerful data description
$PRGNAM: constructs based on associative arrays and extensible semantics.
$PRGNAM: Lua is dynamically typed, runs by interpreting bytecode for a
$PRGNAM: register-based virtual machine, and has automatic memory management
$PRGNAM: with incremental garbage collection, making it ideal for
$PRGNAM: configuration, scripting, and rapid prototyping.
$PRGNAM:
$PRGNAM:
EOT

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

umask ${UMASKBKP}