Increment semantic git version tag by one

tag.increment.sh

#!/bin/bash

### Increments the part of the string
## $2: number of part: 0 – major, 1 – minor, 2 – patch

increment_version() {
  local delimiter=.
  local array=($(echo "$1" | tr $delimiter '\n'))
  array[$2]=$((array[$2]+1))
  if [ $2 -lt 2 ]; then array[2]=0; fi
  if [ $2 -lt 1 ]; then array[1]=0; fi
  NEW_TAG=$(local IFS=$delimiter ; echo "${array[*]}")
}

LATEST_TAG=$(git describe --tags --abbrev=0)

increment_version "$LATEST_TAG" $1

read -r -p "Apply tag $NEW_TAG to branch? [Y/n]" response
response=${response,,} # tolower
if [[ $response =~ ^(yes|y| ) ]] || [[ -z $response ]]; then
    git tag -a $NEW_TAG -m "$NEW_TAG"
else
    exit 1
fi

read -r -p "Push tag $NEW_TAG to origin? [Y/n]" response
response=${response,,} # tolower
if [[ $response =~ ^(yes|y| ) ]] || [[ -z $response ]]; then
    git push origin $NEW_TAG --follow-tags
fi