#!/bin/bash

# Copyright 2005-2019  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=readline
VERSION=${VERSION:-$(echo $PKGNAM-*.tar.?z* | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-1}

# 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

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

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

if [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=pentium4 -mtune=generic"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -march=x86-64 -mtune=generic -fPIC"
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
else
  SLKCFLAGS=${SLKCFLAGS:-"-O2"}
  LIBDIRSUFFIX=${LIBDIRSUFFIX:-""}
fi

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

# Determine readline patchlevel:
PATCHLEVEL="$( cd $CWD/readline-${VERSION}-patches ; /bin/ls readline??-??? 2> /dev/null | tail -1 | cut -f 2 -d - 2> /dev/null )"
if [ "$PATCHLEVEL" = "" ]; then
  PATCHLEVEL=000
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-$VERSION.$PATCHLEVEL-$ARCH-$BUILD.txz"
  exit 0
fi

cd $TMP
rm -rf readline-$VERSION
tar xvf $CWD/readline-$VERSION.tar.?z* || exit 1
cd readline-$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 {} \+

if [ ! "$PATCHLEVEL" = "000" ]; then
  for file in $CWD/readline-*-patches/readline*-??? ; do
    cat $file | patch -p0 --verbose || exit 1
  done
fi

CFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --mandir=/usr/man \
  --infodir=/usr/info \
  --docdir=/usr/doc/readline-$VERSION \
  --with-curses \
  --enable-multibyte \
  --disable-static \
  --build=$ARCH-slackware-linux-gnu || exit 1

# Link with libtinfo:
make $NUMJOBS static shared SHLIB_LIBS=-ltinfo || make static shared SHLIB_LIBS=-ltinfo || exit 1
make install DESTDIR=$PKG || exit 1

# build rlfe (ReadLine Front-End) from examples/
# NOTE:  This will link against the currently installed libreadline!
# Build/install this package twice whenever there is an .soname bump.
( cd examples/rlfe || exit 1
  CFLAGS="$SLKCFLAGS -Wno-error=implicit-function-declaration -Wno-error=implicit-int -Wno-error=int-conversion" \
  ./configure \
    --prefix=/usr \
    --libdir=/usr/lib${LIBDIRSUFFIX} \
    --mandir=/usr/man \
    --infodir=/usr/info \
    --docdir=/usr/doc/readline-$VERSION \
    --build=$ARCH-slackware-linux-gnu || exit 1
  make $NUMJOBS || exit 1
  install -m 755 rlfe $PKG/usr/bin
  cp -a README $PKG/usr/doc/readline-$VERSION/README.rlfe
) || exit 1

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

# Compress manual pages:
find $PKG/usr/man -type f -exec gzip -9 {} \+
for i in $( find $PKG/usr/man -type l ) ; do
  ln -s $( readlink $i ).gz $i.gz
  rm $i
done

# Compress info files, if any:
if [ -d $PKG/usr/info ]; then
  ( cd $PKG/usr/info
    rm -f dir
    gzip -9 *
  )
fi

chmod 755 $PKG/usr/lib${LIBDIRSUFFIX}/lib*.so.*

mkdir -p $PKG/usr/doc/readline-$VERSION
cp -a \
  CHANGELOG CHANGES COPYING* INSTALL MANIFEST README* USAGE \
  $PKG/usr/doc/readline-$VERSION

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

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