#!/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
# Updated by Gwenhael Le Moine, inspired by https://git.archlinux.org/svntogit/packages.git/tree/lua/trunk/PKGBUILD

# 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=lua
VERSION=${VERSION:-5.3.4}
MAJOR_VERSION=${VERSION%.*}
BUILD=${BUILD:-1}
TAG=${TAG:-cyco}

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

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

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION

[ ! -e $CWD/$PRGNAM-${VERSION}.tar.gz ] && wget -c http://www.lua.org/ftp/$PRGNAM-${VERSION}.tar.gz -O $CWD/$PRGNAM-${VERSION}.tar.gz

tar xvf $CWD/$PRGNAM-${VERSION}.tar.gz
cd $PRGNAM-$VERSION
chown -R root:root .

[ ! -e $CWD/liblua.so.patch ] && wget -c https://git.archlinux.org/svntogit/packages.git/plain/lua/trunk/liblua.so.patch -O $CWD/liblua.so.patch
patch -p1 -i $CWD/liblua.so.patch

make MYCFLAGS="$CFLAGS -fPIC -DLUA_COMPAT_5_2 -DLUA_COMPAT_5_1" MYLDFLAGS="$LDFLAGS" linux

make \
    TO_LIB="liblua.a liblua.so liblua.so.$MAJOR_VERSION liblua.so.$VERSION" \
    INSTALL_DATA='cp -d' \
    INSTALL_TOP="$PKG"/usr \
    INSTALL_MAN="$PKG"/usr/man/man1 \
    install

cat <<EOF > lua.pc
V=$MAJOR_VERSION
R=$VERSION

prefix=/usr
INSTALL_BIN=\${prefix}/bin
INSTALL_INC=\${prefix}/include
INSTALL_LIB=\${prefix}/lib
INSTALL_MAN=\${prefix}/man/man1
INSTALL_LMOD=\${prefix}/share/lua/\${V}
INSTALL_CMOD=\${prefix}/lib/lua/\${V}
exec_prefix=\${prefix}
libdir=\${exec_prefix}/lib
includedir=\${prefix}/include

Name: Lua
Description: An Extensible Extension Language
Version: \${R}
Requires:
Libs: -L\${libdir} -llua -lm
Cflags: -I\${includedir}
EOF

install -Dm644 lua.pc "$PKG"/usr/lib/pkgconfig/${PRGNAM}53.pc

ln -sf /usr/bin/lua "$PKG"/usr/bin/lua$MAJOR_VERSION
ln -sf /usr/bin/luac "$PKG"/usr/bin/luac$MAJOR_VERSION
ln -sf /usr/lib/liblua.so.$VERSION "$PKG"/usr/lib/liblua$MAJOR_VERSION.so
ln -sf /usr/lib/pkgconfig/${PRGNAM}53.pc "$PKG"/usr/lib/pkgconfig/$PRGNAM.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/html
cp -a README $PKG/usr/doc/$PRGNAM-$VERSION
cp -a doc/*.html doc/logo.gif doc/lua.css $PKG/usr/doc/$PRGNAM-$VERSION/html

cat $CWD/SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/SlackBuild

mkdir -p $PKG/install
cat <<EOF > $PKG/install/slack-desc
# HOW TO EDIT THIS FILE:
# The "handy ruler" below makes it easier to edit a package description.
# Line up the first '|' above the ':' following the base package name, and
# the '|' on the right side marks the last column you can put a character in.
# You must make exactly 11 lines for the formatting to be correct.  It's also
# customary to leave one space after the ':' except on otherwise blank lines.

   |-----handy-ruler------------------------------------------------------|
lua: lua (a powerful, fast, light-weight, embeddable scripting language)
lua:
lua: Lua combines simple procedural syntax with powerful data description
lua: constructs based on associative arrays and extensible semantics.
lua: Lua is dynamically typed, runs by interpreting bytecode for a
lua: register-based virtual machine, and has automatic memory management
lua: with incremental garbage collection, making it ideal for
lua: configuration, scripting, and rapid prototyping.
lua:
lua:
lua:
EOF

cd $PKG
rm -f $PKG/{,usr/}lib$(uname -m | grep -o 64)/*.la
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}