Bump git version tag by patch, minor, or major

ZSH Git Bump

# Usage: `tag M` | `tag maj` | `tag major` || `tag m` | `tag min` | `tag minor` || `tag p` | `tag patch`

function gtag() {
  if [ -n $1 ]
  then
    echo "› Creating tag: v$1"
    if git tag -a "v$1" -m "v$1" >/dev/null
    then
      echo "› Pushing Tag to Upstream"
      git push origin --tags
    else
      echo "EXITING"
      return
    fi
  else
    echo "Must pass tag"
  fi
}


function tag() {
  if [ -n $1 ]
  then
    git fetch --all --tags
    current_tag="$(git describe --abbrev=0 --tags)"
    echo "› Current Tag: $current_tag"
    vers=("${(@s/./)current_tag}")
    patch=$vers[3]
    minor=$vers[2]
    major=${vers[1][2,-1]}

    if [[ "$1" == "p" || "$1" == "patch" ]]
    then
      echo "› Patching"
      patch=$(($patch + 1))
    elif [[ $1 == "m" || $1 == "min" || $1 == "minor" ]]
    then
      echo "› Minor Update"
      minor=$(($minor + 1))
      patch=0
    elif [[ $1 == "M" || $1 == "maj" || $1 == "major" ]]
    then
      echo "› Major Update"
      major=$(($major + 1))
      minor=0
      patch=0
    else
      echo '›› Failed to create tag'
      return
    fi

    echo "› Updating to: v$major.$minor.$patch"
    gtag $major.$minor.$patch
  else
    echo "››› Must pass tag"
  fi
}

Nice script!