#!/bin/sh

# Slackware build script for lz4

# Written by B. Watson (yalhcru@gmail.com)

# Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.

# 20180611 bkw: update for 1.8.2. don't try to use the updated script
#               to builds older versions, the man pages will end up
#               in the wrong place due to upstream changing how they
#               interpret MANDIR
# 20180114 bkw: update for 1.8.1.2. had to add -j1 to the make command.
# 20170819 bkw: update for 1.8.0
# 20170302 bkw: use github long-format URL
# 20170122 bkw: update for 1.7.5

PRGNAM=lz4
VERSION=${VERSION:-1.8.2}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${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 {} \;

# -j1 was necessary in 1.8.1.2. Not sure it's still needed in 1.8.2, but
# lz4 is small & builds pretty fast even with -j1, so I'll leave it for now.
make -j1 \
  CFLAGS="$SLKCFLAGS" \
  PREFIX=/usr \
  LIBDIR=/usr/lib$LIBDIRSUFFIX \
  MANDIR=/usr/man \
  DESTDIR=$PKG \
  BUILD_STATIC=no \
  default install

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

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

DOCDIR=$PKG/usr/doc/$PRGNAM-$VERSION
mkdir -p $DOCDIR
cp -a NEWS README* doc/* examples $DOCDIR

# the library is BSD licensed, but the programs are GPL.
cat programs/COPYING > $DOCDIR/LICENSE.programs.txt
cat lib/LICENSE > $DOCDIR/LICENSE.lib.txt

cat $CWD/$PRGNAM.SlackBuild > $DOCDIR/$PRGNAM.SlackBuild

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:-tgz}