# The MIT License (MIT)
#
# Copyright (c) 2014 Fritz Mahnke
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

# From: https://github.com/fmahnke/shell-semver/tree/master

#!/bin/bash

# Increment a version string using Semantic Versioning (SemVer) terminology.

# Parse command line options.

while getopts ":Mmp" Option
do
  case $Option in
    M ) major=true;;
    m ) minor=true;;
    p ) patch=true;;
  esac
done

shift $(($OPTIND - 1))

version=$1

# Build array from version string.

a=( ${version//./ } )

# If version string is missing or has the wrong number of members, show usage message.

if [ ${#a[@]} -ne 3 ]
then
  echo "usage: $(basename $0) [-Mmp] major.minor.patch"
  exit 1
fi

# Increment version numbers as requested.

if [ ! -z $major ]
then
  ((a[0]++))
  a[1]=0
  a[2]=0
fi

if [ ! -z $minor ]
then
  ((a[1]++))
  a[2]=0
fi

if [ ! -z $patch ]
then
  ((a[2]++))
fi

echo "${a[0]}.${a[1]}.${a[2]}"