#!/bin/sh

# Copyright 2008, 2009, 2010, 2011, 2012, 2013, 2015  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.


PKGNAM=ruby

if echo $PKGNAM-*.tar.?z* | grep -q p ; then
  # With patchlevel in tarball name:
  VERSION=$(echo $PKGNAM-*.tar.?z* | rev | cut -f 3- -d . | cut -f 1,2 -d - | rev)
else
  # Without patchlevel in tarball name:
  VERSION=$(echo $PKGNAM-*.tar.?z* | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
fi

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:-" -j7 "}

CWD=$(pwd)
TMP=${TMP:-/tmp}
PKG=$TMP/package-ruby

if [ "$ARCH" = "i586" ]; then
  # -O3 works around a compile failure due to a miniruby segfault
  # when trying to build ruby with gcc-4.4 or newer.  Evidently
  # -O0 also works, but...
  # other distributions also use -fno-strict-aliasing which helps stability
  SLKCFLAGS="-march=i586 -mtune=i686 -O3 -fno-strict-aliasing"
  OPTFLAGS=-O3
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  # Unknown if s390 is needs -O3.  Check to see if it compiles with -O2.
  SLKCFLAGS="-O3 -fno-strict-aliasing"
  OPTFLAGS=-O3
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O3 -fPIC -fno-strict-aliasing"
  OPTFLAGS=-O3
  LIBDIRSUFFIX="64"
fi

rm -rf $PKG
mkdir -p $TMP $PKG
cd $TMP
rm -rf ruby-$VERSION
tar xvf $CWD/ruby-$VERSION.tar.?z* || exit 1
cd ruby-$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 {} \;

# Evidently certain things must be linked static. 
# Seems suboptimal to me... 

CFLAGS="$SLKCFLAGS" \
optflags=$OPTFLAGS \
./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --mandir=/usr/man \
  --datadir=/usr/share \
  --docdir=/usr/doc/ruby-$VERSION \
  --enable-shared \
  --enable-pthread \
  --disable-install-capi \
  --build=$ARCH-slackware-linux

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

mkdir -p $PKG/usr/doc/ruby-$VERSION
cp -a \
  BSDL COPYING* *GPL* ChangeLog LEGAL NEWS README* ToDo \
  $PKG/usr/doc/ruby-$VERSION

# The entire ChangeLog is excessive for most users:
cat $PKG/usr/doc/ruby-$VERSION/ChangeLog | head -n 1000 > $PKG/usr/doc/ruby-$VERSION/CL
mv $PKG/usr/doc/ruby-$VERSION/CL $PKG/usr/doc/ruby-$VERSION/ChangeLog

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

# Compress and if needed symlink the man pages:
if [ -d $PKG/usr/man ]; then
  ( cd $PKG/usr/man
    for manpagedir in $(find . -type d -name "man*") ; do
      ( cd $manpagedir
        for eachpage in $( find . -type l -maxdepth 1) ; do
          ln -s $( readlink $eachpage ).gz $eachpage.gz
          rm $eachpage
        done
        gzip -9 *.?
      )
    done
  )
fi

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

cd $PKG
/sbin/makepkg -l y -c n $TMP/ruby-$(echo $VERSION | tr - _)-$ARCH-$BUILD.txz