#!/bin/bash

# Slackware build script for mag

# Written by B. Watson (urchlay@slackware.uk)

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

# VERSION comes from the last modified date on the homepage.

# 20211207 bkw: BUILD=2
# - fix blank window on -current (it shouldn't have worked on 14.2 either).
# - add BUGS to man page (no way to exit mag).

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

PRGNAM=mag
VERSION=${VERSION:-20100913}
BUILD=${BUILD:-2}
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 [ ! -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 [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
else
  SLKCFLAGS="-O2"
fi

set -e

# Since it's just a single C source file, we don't have a
# $TMP/$PRGNAM-$VERSION and don't need find/chown/chmod stuff.
# In case you're wondering, -Wl,-s builds a stripped binary.
rm -rf $PKG
mkdir -p $PKG/usr/bin $OUTPUT

cd $PKG

# 20211207 bkw: we *do* have to patch it now, and we don't want
# to write to $CWD, so:
cat $CWD/$PRGNAM.c > $PRGNAM.c

# 20211207 bkw: silly mistake in the code: it was calling
# XDestroyImage(ximage) before the for loop that *uses* ximage.
# On 14.2's X, this was equivalent to a use-after-free, and worked
# accidentally most (or even all) of the time, but on -current's X,
# it results in a blank (all-black) window.
patch -p0 < $CWD/xdestroyimage.diff

gcc $SLKCFLAGS -Wl,-s -o $PKG/usr/bin/$PRGNAM $PRGNAM.c -lX11
rm $PRGNAM.c

# Man page written by SlackBuild author. Please don't include mag.rst
# in the package, it's the source for the man page only.
mkdir -p $PKG/usr/man/man1
gzip -9c < $CWD/$PRGNAM.1 > $PKG/usr/man/man1/$PRGNAM.1.gz

# Include our own README.
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/README > $PKG/usr/doc/$PRGNAM-$VERSION/README
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