#!/bin/bash
# Build script for Slackware
# Copyright (C) 2018 Damien Goutte-Gattat
#
# Redistribution and use of this script, with or without modifications,
# 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.
#
# Contact: Damien Goutte-Gattat <dgouttegattat@incenp.org>
#
# Latest puzzles sourcecode is available at:
# <https://www.chiark.greenend.org.uk/~sgtatham/puzzles/>.

# Source package infos
NAMESRC=${NAMESRC:-puzzles}
VERSION=${VERSION:-20180429.31384ca}
ARCHIVE=${ARCHIVE:-$NAMESRC-$VERSION.tar.gz}
WGET=${WGET:-https://www.chiark.greenend.org.uk/%7Esgtatham/puzzles/$ARCHIVE}

# Build infos
NAMEPKG=${NAMEPKG:-puzzles}
BUILD=${BUILD:-1GGD}
ARCH=${ARCH:-$(uname -m | sed 's/^i.86$/i486/;s/^arm.*/arm/')}
JOBS=${JOBS:-1}
EXT=${EXT:-txz}

# Directories
TMP=${TMP:-/tmp}
OUT=${OUT:-$TMP/build}
PKG=${PKG:-$OUT/$NAMEPKG}
CWD=$(pwd)

set -e  # Quit if a command returns non-zero

# Sanity checks
if [ $UID -eq 0 ]; then
    echo "You should NOT run this script as ROOT!"
    exit 1
fi
if [ ! -d $TMP ]; then
    echo "$TMP does not exists or is not a directory!"
    exit 1
fi

# Compilation flags
LIBDIRSUFFIX=""
case "$ARCH" in
i?86)
    CPUOPT="-O2 -march=$ARCH -mtune=i686"
    ;;
x86_64)
    CPUOPT="-O2 -fPIC"
    LIBDIRSUFFIX="64"
    ;;
*)
    CPUOPT="-O2"
    ;;
esac

# Get and verify the source archive
if [ ! -r $ARCHIVE ]; then
    wget -c -O $ARCHIVE.part "$WGET"
    mv $ARCHIVE.part $ARCHIVE
fi
sha256sum -c $ARCHIVE.sha256
NAME=$(tar ft $ARCHIVE | head -n 1 | cut -d / -f 1)

# Compile
cd $TMP
echo "Building $ARCHIVE..."
tar xf $CWD/$ARCHIVE
cd $NAME
CFLAGS=$CPUOPT \
./configure \
  --prefix=/usr \
  --disable-dependency-tracking \
  --build=$ARCH-slackware-linux \
  --program-transform-name='s/^/puzzles-/'
make -j $JOBS
make install-strip DESTDIR=$PKG

# Install the documentation
mkdir -p $PKG/usr/doc/$NAME
install -m 644 HACKING LICENCE README $PKG/usr/doc/$NAME

# Copy slack-desc file
install -D -m 644 $CWD/slack-desc $PKG/install/slack-desc

# Package the tree
cd $PKG
mkdir -p $OUT
PACKAGING="
chown root:root . -R
/sbin/makepkg -l y -c n $OUT/$NAMEPKG-$VERSION-$ARCH-$BUILD.$EXT
rm -rf $PKG
rm -rf $TMP/$NAME
"
if type -p fakeroot ; then
    echo "$PACKAGING" | fakeroot
else
    su -c "$PACKAGING"
fi