#!/bin/bash

# Slackware build script for ralcgm

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

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

cd $(dirname $0) ; CWD=$(pwd)

PRGNAM=ralcgm
VERSION=${VERSION:-3.50}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

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

# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
# the name of the created package would be, and then exit. This information
# could be useful to other scripts.
if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

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
mkdir -p $PRGNAM-$VERSION
cd $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.Z
chown -R root:root .

# Departure from template here due to annoying perms in the tarball.
find . -type d -exec chmod 755 {} \+
find . -type f -exec chmod 644 {} \+

# This SlackBuild owes a great debt to PLD Linux:
# git://git.pld-linux.org/packages/ralcgm.git

# Add "linux" as a supported OS.
patch -p1 < $CWD/ralcgm-linux.patch

# Patch was created by running the interactive config, then diffing against
# the un-configured source. Also file locations were edited in mach.h.
patch -p1 < $CWD/no_interactive_config.diff

# Compiler warnings scare me.
patch -p1 < $CWD/fix_warnings.diff

# These 3 stanzas come from PLD's ralcgm.spec:
# The genbez and genher tools need to be built with DATADIR set to ../data/
make -j1 -C src COMPILE="gcc $SLKCFLAGS" cgmfile.o cgmerr.o genbez genher

# ..everything else needs it as /usr/share/ralcgm/.
sed -i '/^#define *DATADIR/s,"\..*,"/usr/share/ralcgm/",' include/mach.h

# Clean up, then build for real.
rm -f src/cgmfile.o src/cgmerr.o
make -C src $PRGNAM cgmlib COMPILE="gcc $SLKCFLAGS"

# Manual install, since the "install" script doesn't actually install.
# Not sure that all the includes are necessary, but they shouldn't do
# any harm.
mkdir -p $PKG/usr/bin $PKG/usr/lib$LIBDIRSUFFIX $PKG/usr/man/man1 \
         $PKG/usr/share/$PRGNAM $PKG/usr/include/$PRGNAM
install -s -oroot -groot -m0755 bin/$PRGNAM $PKG/usr/bin
install -oroot -groot -m0644 bin/libcgm.a $PKG/usr/lib$LIBDIRSUFFIX
install -oroot -groot -m0644 data/* $PKG/usr/share/$PRGNAM
install -oroot -groot -m0644 include/* $PKG/usr/include/$PRGNAM

gzip -9c < docs/$PRGNAM.man > $PKG/usr/man/man1/$PRGNAM.1.gz

# The INSTALL actually has somewhat useful info.
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a README docs/INSTALL examples $PKG/usr/doc/$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