#!/bin/bash

# Copyright 2021 Trevor D. Cook, Issaquah, WA, USA
# Copyright 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.

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

PKGNAM=rubygem-asciidoctor
SRCNAM=asciidoctor
VERSION=${VERSION:-$(basename $(echo $SRCNAM-*.gem | cut -f 2 -d -) .gem)}
BUILD=${BUILD:-1}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$(uname -m)" in
    i?86) ARCH=i586 ;;
    arm*) readelf /usr/bin/file -A | egrep -q "Tag_CPU.*[4,5]" && ARCH=arm || ARCH=armv7hl ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
    *) ARCH=$(uname -m) ;;
  esac
  export ARCH
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

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

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "armv7hl" ]; then
  SLKCFLAGS="-O3 -march=armv7-a -mfpu=vfpv3-d16"
  LIBDIRSUFFIX=""
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

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

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

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 || exit 1

# Strip binaries (there aren't any though):
find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null

# Add a documentation directory:
mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION
cp -a $PKG/usr/lib${LIBDIRSUFFIX}/ruby/gems/*/gems/asciidoctor-${VERSION}/CHANGELOG* $PKG/usr/doc/$PKGNAM-$VERSION
cp -a $PKG/usr/lib${LIBDIRSUFFIX}/ruby/gems/*/gems/asciidoctor-${VERSION}/LICENSE* $PKG/usr/doc/$PKGNAM-$VERSION
cp -a $PKG/usr/lib${LIBDIRSUFFIX}/ruby/gems/*/gems/asciidoctor-${VERSION}/README* $PKG/usr/doc/$PKGNAM-$VERSION

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

cd $PKG
/sbin/makepkg -l y -c n $TMP/$PKGNAM-$VERSION-$ARCH-$BUILD.txz