#!/bin/bash

# Copyright 2008, 2009, 2010, 2013, 2015, 2017, 2018, 2019, 2020  Patrick J. Volkerding, Sebeka, MN, 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.

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

PKGNAM=clisp
VERSION=${VERSION:-$(echo $PKGNAM-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-5}

# Bundled libraries:
FFCALLVER=2.3

# 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

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

# Don't use icecream:
PATH=$(echo $PATH | sed "s|/usr/libexec/icecc/bin||g" | tr -s : | sed "s/^://g" | sed "s/:$//g")

NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}

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

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

#=================================================================
# Build ffcall - needed for --dynamic-ffi with clisp.
cd $TMP
rm -rf libffcall-$FFCALLVER
tar xvf $CWD/libffcall-$FFCALLVER.tar.?z || exit 1
cd libffcall-$FFCALLVER || exit 1

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

CFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --mandir=/usr/man \
  --enable-static=yes \
  --enable-shared=no \
  --build=$ARCH-slackware-linux || exit 1

make $NUMJOBS || make || exit 1

make install DESTDIR=$PKG || exit 1
# We need libffcall installed in order to build clisp:
make install || exit 1

# Move docs around:
mkdir -pm755 $PKG/usr/doc/clisp-$VERSION/libffcall-$FFCALLVER
install -vpm644 README NEWS COPYING \
  $PKG/usr/doc/clisp-$VERSION/libffcall-$FFCALLVER
mv -f $PKG/usr/share/html/* $PKG/usr/doc/clisp-$VERSION/libffcall-$FFCALLVER
rmdir $PKG/usr/share/html/
rmdir $PKG/usr/share/

#=================================================================
 
# OK, now we compile CLISP:
cd $TMP
rm -rf clisp-$VERSION
tar xvf $CWD/clisp-$VERSION.tar.?z || exit 1
cd clisp-$VERSION || exit 1
chown -R root:root .
find . \
  \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
  -exec chmod 755 {} \+ -o \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \+

# Fix build failure with missing struct member:
zcat $CWD/clisp.c_data.compact_empty_buckets.diff.gz | patch -p1 --verbose || exit 1

# Fix modules that need access to symbols in libgnu.a:
zcat $CWD/clisp.link.libgnu.whole-archive.diff.gz | patch -p1 --verbose || exit 1

# I'll be unsafe if I want to:
export FORCE_UNSAFE_CONFIGURE=1

# --cbc instead of --config below will check the build.
# --cbcx will do even more extra checking.

CFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --mandir=/usr/man \
  --docdir=/usr/doc/clisp-$VERSION \
  --with-module=asdf \
  --with-module=berkeley-db \
  --with-module=bindings/glibc \
  --with-module=clx/new-clx \
  --with-module=dbus \
  --with-module=gdbm \
  --with-module=gtk2 \
  --with-module=pcre \
  --with-module=rawsock \
  --with-module=zlib \
  --config builddir \
  --with-dynamic-ffi || exit 1

# Build:
make $NUMJOBS -C builddir || make -C builddir || exit 1

# Install into package:
make -C builddir install DESTDIR=$PKG || exit 1

# Strip stuff:
find $PKG | xargs file | grep -e "executable" -e "shared object" \
  | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null

# Don't ship .la files:
pushd $PKG
  for lafile in usr/lib${LIBDIRSUFFIX}/*.la ; do
    rm -f ${lafile} /${lafile}
  done
popd

#mv $PKG/usr/share/doc/clisp/* $PKG/usr/doc/clisp-$VERSION
rm -r $PKG/usr/share/doc

mv $PKG/usr/share/man $PKG/usr/man
gzip -9 $PKG/usr/man/man?/*.?

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

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