#!/bin/sh

# Written by Thomas Bourdon <thomas dot bourdon at halpanet dot org>
# Copyright: See COPYING file at <http://ftp.halpanet.org/slackware/slackbuilds/COPYING>.

# Build infos
PRGNAM=erlang
VERSION=${VERSION:-24.1.7}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

# Determine some specific variables to build software.
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

# Exit on most errors
set -e

# Extract the software
rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf otp-OTP-${VERSION}
tar xvf $CWD/OTP-${VERSION}.tar.?z*
cd otp-OTP-${VERSION}
chown -R root:root .
find . \
 \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
 -exec chmod 755 {} + -o \
 \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
 -exec chmod 644 {} +

# Build the software
./otp_build autoconf

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --disable-riak \
  --with-ssl=/opt/openssl1.1 \
  --build=$ARCH-slackware-linux

INSTALL_DV="install: install.dirs install.emulator install.libs"
sed -i -e "s|$INSTALL_DV install.Install install.bin|$INSTALL_DV|" Makefile

make ${NUMJOBS:-" -j5 "} || make
make install DESTDIR=$PKG

cd $PKG/usr/bin
for file in erl erlc epmd run_erl to_erl dialyzer typer escript ; do
  rm -f $file
  ln -s ../lib${LIBDIRSUFFIX}/erlang/bin/$file .
done
cd -

# Strip binaries and libraries
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

# Copy the slack-desc and a custom doinst.sh into ./install
mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
sed "s%@LIBDIR@%/usr/lib${LIBDIRSUFFIX}%g" $CWD/doinst.sh > $PKG/install/doinst.sh

# Make the package
cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}