#!/bin/bash

# Slackware build script for mpb

# Copyright 2019,2020 Paul Kinsler, U.K.
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

PRGNAM=mpb
VERSION=${VERSION:-1.11.1}
BUILD=${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

# change annoying underscores into hyphens
SVERSION=$(echo $VERSION | tr '_' '-')
# make a custom list of doc files in advance
DOCFILES="AUTHORS COPYING COPYRIGHT TODO README.md NEWS.md"

set -e

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

# if there is no configure script, try to build one!
if [ ! -f ./configure ] ; then
  ./autogen.sh
fi

LOCALCONFIGS=
XDBFILE=/etc/sbo_pkg_options.conf
if [ -f ${XDBFILE} ] ; then
  LOCALCONFIGS=${LOCALCONFIGS}" "$(grep "^${PRGNAM}:" ${XDBFILE} | grep -v '^#' | awk -F: '{print$2}')
  echo Build options selected by file: LOCALCONFIGS=${LOCALCONFIGS}
fi
if [  -n "${SBOPTIONS_MPB}" ] ; then
  LOCALCONFIGS=${LOCALCONFIGS}" "${SBOPTIONS_MPB}
  echo Build options selected by environment: LOCALCONFIGS=${LOCALCONFIGS}
fi

# check for the Atlas replacement for blas; if the libraries are found,
#  add the configure option accordingly

if [ -f /usr/lib/libatlas.a ] ; then
  if [ -f /usr/lib/libatlas.so ] ; then
    echo "NOTICE: libatlas was found, configure --with-blas=atlas"
    LOCALCONFIGS=${LOCALCONFIGS}" --with-blas=atlas"
  fi
fi

#  LOCALCONFIGS without any mpi requests so I can do a no-mpi compile.
SPLOCALCONFIGS=$(echo $LOCALCONFIGS | sed s/--with-mpi// | sed s/--with-openmp//)


# do two passes; first with no mpi (to get mpb-data),
# then a second *with* mpi

CFLAGS="$SLKCFLAGS" \
CPPFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --mandir=/usr/man \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --docdir=/usr/doc/$PRGNAM-$VERSION \
  --build=$ARCH-slackware-linux \
  $SPLOCALCONFIGS

make
make install DESTDIR=$PKG

CFLAGS="$SLKCFLAGS" \
CPPFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --mandir=/usr/man \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --docdir=/usr/doc/$PRGNAM-$VERSION \
  --build=$ARCH-slackware-linux \
  $LOCALCONFIGS

make
make install DESTDIR=$PKG

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

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
install -m 0644 $DOCFILES $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$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}