creates git alias 'vtag' that signs, verifies, and pushes local tag to remote

verifyTag.sh

#!/bin/bash

# description: 
# creates git alias 'vtag' that signs, verifies, and pushes local tag to remote

# usage: `git vtag <tag-name> [<target branch>]` e.g. `git vtag v1.2.3`

# params:
# <tag name> name of tag e.g. 'v1.2.3'
# <target branch> optional argument, branch to be tagged e.g. 'feature-branch', default is 'master'

# executed commands:
# - checkout master (or optionally <target branch>) 
# - update local with remote
# - signs tag with annotation of tag name
# - verifies tag
# - pushes tag to remote 

# assumptions: 
# - GPG signing key is set in git config
# - repo permissions and git credentials allow pushing directly

# create alias:
# copypasta script below and execute in terminal or save file and run `chmod u+x $HOME/verifyTag.sh | . $HOME/verifyTag.sh`

git config --global alias.vtag '! _() {
  if [ -z "${2}" ]; then
    git checkout master
    echo "verifying tag on master branch"
  else 
    git checkout ${2}
    echo "verifying tag on ${2} branch"
  fi
    git pull &&
    git tag -s "$1" -m "$1" &&
    git tag -v "$1" &&
    git push origin "$1"
}; _'