#!/bin/bash

# Slackware build script for glktermw

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

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

# Notes:

# Upstream doesn't support shared libraries. I could patch the Makefile
# and do a shared lib, but I'd be inventing my own shared-lib versioning
# scheme (see office/mupdf/README_shared.txt for my reasons not to want
# to do this).

# Using -Os rather than -O2 in SLKCFLAGS. This makes the static library
# 15% smaller with no noticeable difference in speed, since a text game
# spends most of its time waiting for the user to type something. Please,
# SBo admins, don't change this unless you have evidence that the
# optimization is causing an actual problem with running software that
# links to the library. Currently only one thing links with it (fizmo)
# and I've tested it pretty thoroughly.

# The includes get installed in /usr/include/glktermw instead of directly
# in /usr/include as upstream recommends. This is because remglk (another
# glk implementation) wants to install slightly different headers in
# the same place... so both get subdirectories.

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

PRGNAM=glktermw
VERSION=${VERSION:-1.0.4}
BUILD=${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 [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-Os -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-Os -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-Os -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-Os"
  LIBDIRSUFFIX=""
fi

set -e

# tarball inner dir name, *not* the same as PRGNAM. Grr.
DIRNAM=glkterm

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $DIRNAM
tar xvf $CWD/$PRGNAM-${VERSION//./}.tar.gz
cd $DIRNAM

# no subdirs, no scripts, no need for the huge find|chown template stuff.
chown -R root:root .
chmod 644 *

# The readme.txt says to edit gtoption.h if needed; we don't need to.
# The -Wno-endif-labels quiets some pointless warnings (about comments,
# not labels, despite the warning's name).
make OPTIONS="$SLKCFLAGS -Wno-endif-labels"

# Careful, warrior! strip strips too much from a static lib by default.
strip --strip-unneeded lib$PRGNAM.a

# No install target, Makefile comments explain how to install it.
# Make.glktermw really shouldn't go in /usr/include, it's *not* a C
# include (it's a Makefile include), but that's where upstream wants it,
# and where stuff that builds with glktermw looks for it (?)
# The Makefile says we only need to install glk.h and glkstart.h,
# but fizmo wants to include gi_blorb.h. Also gi_dispa.h looks like
# public API stuff.
mkdir -p $PKG/usr/lib$LIBDIRSUFFIX $PKG/usr/include/$PRGNAM
cat lib$PRGNAM.a > $PKG/usr/lib$LIBDIRSUFFIX/lib$PRGNAM.a
for i in glk.h glkstart.h Make.$PRGNAM gi_*.h; do
  cat $i > $PKG/usr/include/$PRGNAM/$i
done

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a *.txt $PKG/usr/doc/$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