git-tag

#!/usr/bin/env bash
# *************************************
#
#   Git Tag
#   -> Automatically set a git tag based on Semantic Versioning keyword
#
# -------------------------------------
#   Usage
# -------------------------------------
#
# $1 - 'major', 'minor', 'patch'
#
# Usage: `git-tag major`
#
# *************************************

tag=$(git describe --abbrev=0 --tags 2>/dev/null)
prefix=$(echo $tag | grep -o --color=never "[A-z]\+")
major=$(echo $tag | cut -d '.' -f1 | grep -o --color=never "[0-9]")
minor=$(echo $tag | cut -d '.' -f2)
patch=$(echo $tag | cut -d '.' -f3)

case "$1" in

  'major')
    nmajor=$(($major+1))
    version="$nmajor.0.0"
    ;;

  'minor')
    nminor=$(($minor+1))
    version="$major.$nminor.0"
    ;;

  'patch')
    npatch=$(($patch+1))
    version="$major.$minor.$npatch"
    ;;

  *)
    echo "Automatically set a git tag based on Semantic Versioning keyword"
    echo
    echo "Usage: git-tag <major|minor|patch>"
    echo
    echo "Example:"
    echo "  git-tag major"
    echo
    echo "If this is your first tag, use 'git tag' to set up your first one."

esac

if [[ "$version" ]]; then
  git tag -a "$prefix$version" -m "Version $version"
  echo "$prefix$version created!"
fi