Increment version number

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script to increment version number

For use with scripts, or more customizability to apply to various versioning systems. It could use a couple more options, but as it stands now it works for my projects using the "major.minor[.maintenance[.build]]" version sequences. Obviously, this is excessive just to increment a version string. But I wrote this because I had a need for different types of projects, and because if speed is not an issue, I prefer reusability over tweaking the same code across dozens of scripts. I guess that's just my object-oriented side leaking into my scripts.

from that source -> http://stackoverflow.com/questions/8653126/how-to-increment-version-number-in-a-shell-script

# Accepts a version string and prints it incremented by one.
# Usage: increment_version <version> [<position>] [<leftmost>]
increment_version() {
  local usage=" USAGE: $FUNCNAME [-l] [-t] <version> [<position>] [<leftmost>]
          -l : remove leading zeros
          -t : drop trailing zeros
   <version> : The version string.
  <position> : Optional. The position (starting with one) of the number 
               within <version> to increment.  If the position does not 
               exist, it will be created.  Defaults to last position.
  <leftmost> : The leftmost position that can be incremented.  If does not
               exist, position will be created.  This right-padding will
               occur even to right of <position>, unless passed the -t flag."

  # Get flags.
  local flag_remove_leading_zeros=0
  local flag_drop_trailing_zeros=0
  while [ "${1:0:1}" == "-" ]; do
     if [ "$1" == "--" ]; then shift; break
     elif [ "$1" == "-l" ]; then flag_remove_leading_zeros=1
     elif [ "$1" == "-t" ]; then flag_drop_trailing_zeros=1
     else echo -e "Invalid flag: ${1}\n$usage"; return 1; fi
     shift; done

  # Get arguments.
  if [ ${#@} -lt 1 ]; then echo "$usage"; return 1; fi
  local v="${1}"             # version string
  local targetPos=${2-last}  # target position
  local minPos=${3-${2-0}}   # minimum position

  # Split version string into array using its periods. 
  local IFSbak; IFSbak=IFS; IFS='.' # IFS restored at end of func to                     
  read -ra v <<< "$v"               #  avoid breaking other scripts.

  # Determine target position.
  if [ "${targetPos}" == "last" ]; then 
     if [ "${minPos}" == "last" ]; then minPos=0; fi
     targetPos=$((${#v[@]}>${minPos}?${#v[@]}:$minPos)); fi
  if [[ ! ${targetPos} -gt 0 ]]; then
     echo -e "Invalid position: '$targetPos'\n$usage"; return 1; fi
  (( targetPos--  )) || true # offset to match array index

  # Make sure minPosition exists.
  while [ ${#v[@]} -lt ${minPos} ]; do v+=("0"); done;

  # Increment target position.
  v[$targetPos]=`printf %0${#v[$targetPos]}d $((${v[$targetPos]}+1))`;

  # Remove leading zeros, if -l flag passed.
  if [ $flag_remove_leading_zeros == 1 ]; then
     for (( pos=0; $pos<${#v[@]}; pos++ )); do
        v[$pos]=$((${v[$pos]}*1)); done; fi

  # If targetPosition was not at end of array, reset following positions to
  #   zero (or remove them if -t flag was passed).
  if [[ ${flag_drop_trailing_zeros} -eq "1" ]]; then
       for (( p=$((${#v[@]}-1)); $p>$targetPos; p-- )); do unset v[$p]; done
  else for (( p=$((${#v[@]}-1)); $p>$targetPos; p-- )); do v[$p]=0; done; fi

  echo "${v[*]}"
  IFS=IFSbak
  return 0
}

# EXAMPLE   ------------->   # RESULT
increment_version 1          # 2
increment_version 1 2        # 1.1
increment_version 1 3        # 1.0.1
increment_version 1.0.0      # 1.0.1
increment_version 1.2.3.9    # 1.2.3.10
increment_version 00.00.001  # 00.00.002
increment_version -l 00.001  # 0.2
increment_version 1.1.1.1 2   # 1.2.0.0
increment_version -t 1.1.1 2  # 1.2
increment_version v1.1.3      # v1.1.4
increment_version 1.2.9 2 4     # 1.3.0.0
increment_version -t 1.2.9 2 4  # 1.3
increment_version 1.2.9 last 4  # 1.2.9.1

find version number

in a script you can use this from your spec file

version=$(grep -sri 'define version' *.spec | sed 's/%define version //gI')