#!/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\/
}

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`
}

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`
}

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`
}

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 and"
echo "run all tests.  The easiest way to do this is to run \"make for-release\""
echo "from the root of the repository.  In addition to the full build with"
echo "unit and integration tests, this also runs tests which verify the maven"
echo "archetypes that plugin developers rely on to set up their projects."
exit 0