Interactive bash script to push a new tag and release version. Automatically increments major, minor, or patch version based on the latest tag (assumes you are using {major}.{minor}.{patch} format)

git-tag-and-release.sh

#!/usr/bin/env bash

############################################################
# Help                                                     #
############################################################
Help()
{
   # Display Help
   echo "Increment the latest tag and create a new tag & release."
   echo
   echo "Syntax: release [-major|-minor|-patch|-h]"
   echo "options:"
   echo "-M | -major  Increment the major version. (Ex: 1.0.0 -> 2.0.0)"
   echo "-m | -minor  Increment the minor version. (Ex: 1.0.0 -> 1.1.0)"
   echo "-p | -patch  Increment the patch version. (Ex: 1.0.0 -> 1.0.1)"
   echo "-h | -help   Print this Help."
   echo
}

############################################################

while [ $# -gt 0 ] ; do
  case $1 in
    -M | --major) part="0"; name="major" ;;
    -m | --minor) part="1"; name="minor";;
    -p | --patch) part="2"; name="patch" ;;
    -h | --help) Help ; exit 0 ;;
  esac
  shift
done

echo "Incrementing $name version... "

### Increments the part of the string
## $1: version itself
## $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
  echo $(local IFS=$delimiter ; echo "${array[*]}")
}

# Create the github tag
TAG=$(git describe --tags `git rev-list --tags --max-count=1`)
VERSION=`increment_version $TAG $part 1`

echo "New version is: $VERSION"

rm -R -f dist
mkdir -p dist 
cp .serverless/* dist/

git tag -a $VERSION -m "Release of version $VERSION"
git push --tags
gh release create v$VERSION ./dist/* --generate-notes