#!/bin/sh

#
#    Copyright 2014-2016 Nest Labs Inc. All Rights Reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License");
#    you may not use this file except in compliance with the License.
#    You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS,
#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#    See the License for the specific language governing permissions and
#    limitations under the License.
#

#
#    Description:
#      This file is a convenience script for building, for the current
#      build host system, the minimal, core set of GNU autotools on
#      which other projects' build systems depend.
#

#
# usage
#
# Display program usage.
#
usage() {
    name=`basename ${0}`

    echo "Usage: ${name} [ options ] [ -- <package> ... ]"

    if [ $1 -ne 0 ]; then
        echo "Try '${name} -h' for more information."
    fi

    if [ $1 -ne 1 ]; then
        echo ""
        echo "  -h, --help       Print this help, then exit."
        echo ""
    fi

    exit $1
}

# Parse out any command line options

while [ ${#} -gt 0 ]; do
    if [ ${1} == "-h" ] || [ ${1} == "--help" ]; then
        usage 0

    elif [ ${1} == "--" ]; then
        shift 1
        break

    else
        usage 1

    fi
done

# Determine what packages to build

if [ ${#} -gt 0 ]; then
    SUBDIRS="${*}"

else
    SUBDIRS="`cat packages`"

fi

stem=tools/packages
abs_srcdir=`pwd`
abs_top_srcdir=`echo ${abs_srcdir} | sed -e s,/${stem},,g`

abs_top_hostdir="${abs_top_srcdir}/tools/host"

# Figure out what sort of build host we are running on, stripping off
# any trailing version number information typically included on Darwin
# / Mac OS X.

host=`../../autoconf/config.guess | sed -e 's,[[:digit:].]*$,,g'`

echo "================================================================================"
echo "Building GNU autotools for ${host}..."

for subdir in ${SUBDIRS}; do
  echo "--------------------------------------------------------------------------------"
  version=`cat ${subdir}/${subdir}.version`
  package="${subdir}-${version}"

  cd ${subdir} || exit ${?}

  if [ ! -d "${package}" ]; then
      echo "Expanding ${subdir}..."
      tar -xf ${subdir}.tar.?z || exit ${?}
  fi

  echo "Setting up ${subdir}..."
  mkdir -p build/${host} || exit ${?}
  cd build/${host} || exit ${?}

  echo "Configuring ${package}..."
  PATH=${abs_top_hostdir}/bin:${abs_top_hostdir}/${host}:${PATH} ${abs_srcdir}/${subdir}/${package}/configure --prefix=/ --exec-prefix=/${host} || exit ${?}
  cd ../.. || exit ${?}

  echo "Building ${package}..."
  make -C build/${host} all || exit ${?}

  echo "Installing ${package}..."
  make -C build/${host} DESTDIR=${abs_top_hostdir} install || exit ${?}
  echo "Done."
  cd ${abs_srcdir} || exit ${?}
done

echo "================================================================================"