#!/bin/sh

# Copyright 2010 B. Watson (yalhcru@gmail.com)
# Copyright 2010, 2015  Patrick J. Volkerding, Sebeka, Minnesota, USA
# 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.

# Slackware build script for xaos

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

# A few notes:
#
# Package really wants to use its own CFLAGS (even checks for them
# in the configure script). Let it...
# 
# SFFE is the user formula evaluator, which allows users to define their
# own fractals. On x86 platforms, an assembly-language implementation of
# SFFE is used. On non-x86 platforms, SFFE requires a library called GSL
# (GNU Scientific Library, available from SBo).
# 
# xaos is still interesting and useful without SFFE support (most users
# probably don't know/care about the math, so they'll never use the SFFE
# stuff anyway), so we'll just disable it on non-x86 platforms by default.
# 
# If you really want to use it, set USE_GSL=yes in the environment before
# running this script. There's no need to use GSL on x86 platforms, since
# the asm code is (or should be) faster, but the option is there if you
# want to use it anyway.
# 
# Multilib users also have the option of building on a 32-bit Slackware system
# (or in a chroot) and the resulting package will run just fine on 64-bit.
#
# If the preceding didn't make any sense, here's the bottom line:
# 
# - Regular Slackware (x86) users can just run this script and ignore the junk
#   above.
#
# - Everyone else (Slamd64, Bluewhite64, Slackware64, ???) can just
#   run this script and probably never notice the missing functionality.
#
# - If you're not on x86, but you want the formula evaluator, install GSL
#   and then run this script with USE_GSL=yes in the environment.

PKGNAM=xaos
VERSION=${VERSION:-$(echo $PKGNAM-*.tar.?z* | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-1}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    # might as well use i686 since it won't listen to our CFLAGS anyway
    i?86) ARCH=i686 ;;
    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}
PKG=$TMP/package-$PKGNAM
OUTPUT=${OUTPUT:-/tmp}

USE_GSL=${USE_GSL:-no}

if [ "$USE_GSL" = "yes" ]; then
	GSL_OPT="yes"
	SFFE_OPT="yes"
elif [ "$ARCH" = "i486" -o "$ARCH" = "i686" ]; then
	GSL_OPT="no"
	SFFE_OPT="yes"
else
	GSL_OPT="no"
	SFFE_OPT="no"
fi

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PKGNAM-$VERSION
tar xvf $CWD/$PKGNAM-$VERSION.tar.?z* || exit 1
cd $PKGNAM-$VERSION || exit 1

zcat $CWD/xaos.x86.registers.diff.gz | patch -p1 --verbose || exit 1

chown -R root:root .
chmod -R a-s,u+w,go+r-w .

./configure \
  --prefix=/usr \
  --docdir=/usr/doc/$PKGNAM-$VERSION \
  --infodir=/usr/info \
  --mandir=/usr/man \
  --with-gsl=$GSL_OPT \
  --with-sffe=$SFFE_OPT \
  --with-pthread=yes \
  --build=$ARCH-slackware-linux

make || exit 1
# binary already stripped, yay!
make install DESTDIR=$PKG || exit 1

# Replace bogus manpage:
zcat $CWD/xaos.6.gz > $PKG/usr/man/man6/xaos.6

gzip -9 $PKG/usr/man/man6/xaos.6
rm -f $PKG/usr/info/dir
gzip -9 $PKG/usr/info/*.info*

mkdir -p $PKG/usr/doc
mv $PKG/usr/share/XaoS/doc $PKG/usr/doc/xaos-$VERSION
( cd $PKG/usr/share/XaoS ; ln -sf ../../doc/xaos-$VERSION doc )

mkdir -p $PKG/usr/share/applications
cat $CWD/xaos.desktop > $PKG/usr/share/applications/xaos.desktop

mkdir -p $PKG/usr/share/pixmaps
cat $CWD/xaos.png > $PKG/usr/share/pixmaps/xaos.png

chmod 644 $PKG/usr/doc/xaos-$VERSION/*
rm -f $PKG/usr/doc/xaos-$VERSION/ChangeLog.old
cp -a \
  AUTHORS COPYING* INSTALL NEWS README* TODO \
  $PKG/usr/doc/xaos-$VERSION

# If there's a ChangeLog, installing at least part of the recent history
# is useful, but don't let it get totally out of control:
if [ -r ChangeLog ]; then
  DOCSDIR=$(echo $PKG/usr/doc/${PKGNAM}-$VERSION)
  cat ChangeLog | head -n 1000 > $DOCSDIR/ChangeLog
  touch -r ChangeLog $DOCSDIR/ChangeLog
fi

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PKGNAM-$VERSION-$ARCH-$BUILD.txz