#!/bin/sh
#
# Copyright 2012-2014 Red Hat, Inc.
#
# This file is part of Thermostat.
#
# Thermostat is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published
# by the Free Software Foundation; either version 2, or (at your
# option) any later version.
#
# Thermostat is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Thermostat; see the file COPYING.  If not see
# <http://www.gnu.org/licenses/>.
#
# Linking this code with other modules is making a combined work
# based on this code.  Thus, the terms and conditions of the GNU
# General Public License cover the whole combination.
#
# As a special exception, the copyright holders of this code give
# you permission to link this code with independent modules to
# produce an executable, regardless of the license terms of these
# independent modules, and to copy and distribute the resulting
# executable under terms of your choice, provided that you also
# meet, for each linked independent module, the terms and conditions
# of the license of that module.  An independent module is a module
# which is not derived from or based on this code.  If you modify
# this code, you may extend this exception to your version of the
# library, but you are not obligated to do so.  If you do not wish
# to do so, delete this exception statement from your version.
#
#####################################################################

usage() {
  echo "Usage:"
  echo "   update-version <-h|-help|--help|help> | -<t|r|d> OLD_VERSION NEW_VERSION"
  echo "Each version should be of the form \"x.y.z\""
}

bad_option() {
  echo "Invalid option: $1"
  usage
  exit 1
}

bad_version() {
  echo "Invalid version: $1"
  usage
  exit 1
}

valid_version="[[:digit:]]\+.[[:digit:]]\+.[[:digit:]]\+"
check_version() {
  if [ -z ${1} ]; then
    bad_version ${1}
  fi
  stripped_version=`echo $1 | sed -E  's/[[:digit:]]+\.[[:digit:]]+\.[[:digit:]]+//'`
  if [ ! -z ${stripped_version} ]; then
    bad_version ${1}
  fi
}

print_help() {
  echo "update-version: a tool to help with bumping versions in Thermostat trunk and release branches"
  echo ""
  usage
  echo ""
  echo "Updates version across project from OLD_VERSION to NEW_VERSION"
  echo ""
  echo "Options:"
  echo "  -t: Bump version on trunk."
  echo "      SNAPSHOT qualifier is assumed to be present, and will remain."
  echo "  -r: Bump version on release branch in preparation for release."
  echo "      SNAPSHOT qualifier is assumed to be present, and will be removed."
  echo "  -d: Bump version on release branch to prepare for devel/backports."
  echo "      SNAPSHOT qualifier is assumed to be absent, and will be added."
  
}

if [ $1 = "-help" -o $1 = "-h" -o $1 = "--help" -o $1 = "help" ]; then
  print_help
  exit 0
fi

if [ $# != 3 ]; then
  echo "Invalid number of arguments"
  usage
  exit 1
fi

option=$1
old=$2
new=$3
old_regex=`echo ${old} | sed -e 's/[.]/\\\\&/g'`

check_version ${old}
check_version ${new}

find_and_warn_incomplete() {
  echo "Check for possible missed version changes in the following files:"
  echo ""
  grep --binary-files=without-match --exclude-dir=target -l -R ${old_regex} ./*
}

find_pom_metadata() {
  find ./ -name pom.xml -o -name archetype-metadata.xml | grep -v \/target\/
}

find_target() {
  find ./ -name *.target | grep -v \/target\/
}

find_eclipse_manifest() {
  find ./eclipse -name MANIFEST.MF | grep -v \/target\/
}

find_eclipse_category_feature() {
  find ./eclipse -name category.xml -o -name feature.xml | grep -v \/target\/
}

find_build_properties() {
  find ./eclipse -name build.properties | grep -v \/target\/
}

bump_keep_qualifier() {
  echo "Keeping SNAPSHOT qualifier..."
  sed -i s/${old_regex}-SNAPSHOT/${new}-SNAPSHOT/g `find_pom_metadata`
  sed -i s/${old_regex}\.SNAPSHOT/${new}.SNAPSHOT/g `find_target`
  sed -i "s/Bundle-Version: ${old_regex}.qualifier/Bundle-Version: ${new}.qualifier/g" `find_eclipse_manifest`
  sed -i s/${old_regex}.qualifier/${new}.qualifier/g `find_eclipse_category_feature`
}

bump_drop_qualifier() {
  echo "Dropping SNAPSHOT qualifier..."
  sed -i s/${old_regex}-SNAPSHOT/${new}/g `find_pom_metadata`
  sed -i s/${old_regex}\.SNAPSHOT/${new}/g `find_target`
  sed -i "s/Bundle-Version: ${old_regex}.qualifier/Bundle-Version: ${new}/g" `find_eclipse_manifest`
  sed -i s/${old_regex}.qualifier/${new}/g `find_eclipse_category_feature`
  sed -i "s/forceContextQualifier = SNAPSHOT//" `find_build_properties`
  sed -i '${/^$/d}' `find_build_properties`
}

bump_add_qualifier() {
  echo "Adding SNAPSHOT qualifier..."
  sed -i s/${old_regex}/${new}-SNAPSHOT/g `find_pom_metadata`
  sed -i s/${old_regex}/${new}.SNAPSHOT/g `find_target`
  sed -i "s/Bundle-Version: ${old_regex}/Bundle-Version: ${new}.qualifier/g" `find_eclipse_manifest`
  sed -i s/${old_regex}/${new}.qualifier/g `find_eclipse_category_feature`
  sed -i "$ a \forceContextQualifier = SNAPSHOT" `find_build_properties`
}

echo ""
echo "Updating version across project..."
if [ ${option} = "-t" ]; then
  # trunk; bump version but keep SNAPSHOT qualifier
  bump_keep_qualifier
elif [ ${option} = "-r" ]; then
  # release; bump version and drop SNAPSHOT qualifier
  bump_drop_qualifier
elif [ ${option} = "-d" ]; then
  # devel; restore SNAPSHOT qualifier
  bump_add_qualifier
else
  bad_option ${option}
fi
echo "Finished updating version."
echo ""
find_and_warn_incomplete
echo ""
echo "Before you commit, tag, or release, be sure to run a full build:"
echo "   USE_VNC=true make"
exit 0