#!/bin/bash

# Slackware build script for rubygem-powerpack

# Copyright 2018,2020 Andrew Clemons, Wellington New Zealand
# 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)

PRGNAM=rubygem-powerpack
VERSION=${VERSION:-0.1.3}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

SRCNAM=powerpack

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) 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 "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

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

set -e

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

DESTDIR=$( ruby -r rbconfig -e '
include RbConfig
printf("%s/%s/gems/%s\n",
	CONFIG["libdir"],
	CONFIG["RUBY_INSTALL_NAME"],
	CONFIG["ruby_version"]
      )
')

gem specification $CWD/$SRCNAM-$VERSION.gem | \
	ruby -r yaml -r rbconfig -e '
c = RbConfig::CONFIG
path = sprintf("%s/%s/gems/%s",
        c["libdir"],
        c["RUBY_INSTALL_NAME"],
        c["ruby_version"])
sys_gemspecs = Dir.glob(path + "/specifications/**/*.gemspec").map {|g| gs = Gem::Specification.load(g); gs.name }
obj = Gem::Specification.from_yaml($stdin)
obj.dependencies.each {|dep|
        if not(dep.type == :runtime)
                next
        end
        if not(sys_gemspecs.include?(dep.name))
                $stderr.write("WARNING: #{dep.name} gem not found\n")
                sleep 0.5
        end

}'

gem install \
	--local \
	--no-update-sources \
	--ignore-dependencies \
	--backtrace \
	--install-dir $PKG/$DESTDIR \
	--bindir $PKG/usr/bin \
	$CWD/$SRCNAM-$VERSION.gem

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
tar -x -O --file=$CWD/$SRCNAM-$VERSION.gem data.tar.gz \
  | tar -xz -C $PKG/usr/doc/$PRGNAM-$VERSION --file=- \
  CHANGELOG.md LICENSE.txt README.md
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