#!/bin/bash

# Copyright 2008, 2009, 2010, 2013, 2014, 2018, 2021  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.

# by: volkerdi@slackware.com

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

PKGNAM=gpm
VERSION=1.20.7
BUILD=${BUILD:-9}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i586 ;;
    arm*) export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) export ARCH=$( 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 "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PKGNAM-$VERSION-$ARCH-$BUILD.txz"
  exit 0
fi

TMP=${TMP:-/tmp}
PKG=$TMP/package-gpm

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686 -fcommon"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2 -fcommon"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC -fcommon"
  LIBDIRSUFFIX="64"
fi

rm -rf $PKG
mkdir -p $TMP $PKG

cd $TMP
rm -rf gpm-$VERSION || exit 1
tar xvf $CWD/gpm-$VERSION.tar.xz || exit 1
cd gpm-$VERSION || exit 1

chown -R root:root .
find . \
  \( -perm 700 -o -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
  -exec chmod 755 {} \+ -o \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \+

zcat $CWD/gpm-1.20.1-lib-silent.patch.gz | patch -p1 --verbose || exit 1
zcat $CWD/gpm-1.20.5-close-fds.patch.gz | patch -p1 --verbose || exit 1
zcat $CWD/gpm-1.20.1-select-1.patch.gz | patch -p1 --verbose || exit 1
zcat $CWD/gpm.types.diff.gz | patch -p1 --verbose || exit 1
zcat $CWD/gpm.gcc7.diff.gz | patch -p1 --verbose || exit 1

sh autogen.sh

# This is *supposed* to prevent linking libgpm.so with -lncurses,
# but for some reason it doesn't have the desired effect here.
# Any ideas?  The patch is supposed to resolve a circular dependency
# between libgpm.so and libncurses.so.  I don't notice any ill effects
# here, but perhaps the problem would occur if prelinking was used.
# Also, ncurses has not shown an ldd link to libgpm for several releases,
# so perhaps any problem that existed was fixed on their end.
# NOTE:  Since this isn't preventing gpm from linking to ncurses, I'm
# commenting this patch out until we understand better if it's even
# useful for anything.  Half a patch seems worse than no patch.
#zcat $CWD/gpm-1.20.1-weak-wgetch.patch.gz | patch -p1 --verbose || exit 1

# Since we just patched configure.ac, run this again to carry the change
# into configure:
autoconf

CFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --sysconfdir=/etc \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --build=$ARCH-slackware-linux || exit 1

make || exit 1
make install DESTDIR=$PKG || exit 1

# Emacs ships better versions of these:
rm -rf $PKG/usr/share/emacs

chmod 755 $PKG/usr/lib${LIBDIRSUFFIX}/libgpm.so.*
mkdir $PKG/lib${LIBDIRSUFFIX}
mv $PKG/usr/lib${LIBDIRSUFFIX}/libgpm.so.* $PKG/lib${LIBDIRSUFFIX}
rm -f $PKG/usr/lib${LIBDIRSUFFIX}/libgpm.so
( cd $PKG/usr/lib${LIBDIRSUFFIX}
  ln -sf ../../lib${LIBDIRSUFFIX}/libgpm.so.? libgpm.so )

zcat $CWD/inputattach.c.gz > inputattach.c
gcc $SLKCFLAGS -o inputattach inputattach.c || exit
cat inputattach > $PKG/usr/bin/inputattach

mkdir -p $PKG/etc/rc.d

( cd conf
  cat gpm-root.conf > $PKG/etc/gpm-root.conf
  cat gpm-syn.conf > $PKG/etc/gpm-syn.conf
  cat gpm-twiddler.conf > $PKG/etc/gpm-twiddler.conf
)

mv $PKG/usr/share/{info,man} $PKG/usr
gzip -9 $PKG/usr/man/man*/*.?
gzip -9 $PKG/usr/info/*

mkdir -p $PKG/usr/doc/gpm-$VERSION
cp -a \
  BUGS COPYING* Changelog Changes MANIFEST README* TODO \
  doc/{Announce,FAQ,HACK_GPM,README*,changelog} \
  $PKG/usr/doc/gpm-$VERSION

zcat $CWD/mouseconfig.gz > $PKG/usr/sbin/mouseconfig
chmod 755 $PKG/usr/bin/* $PKG/usr/sbin/*
mkdir -p $PKG/var/log/setup
zcat $CWD/setup.mouse.gz > $PKG/var/log/setup/setup.mouse
chmod 755 $PKG/var/log/setup/setup.mouse

( cd $PKG
  find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
  find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
)

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

# Build the package:
cd $PKG
makepkg -l y -c n $TMP/gpm-$VERSION-$ARCH-$BUILD.txz