Script recreates an existing Git tag by removing it and creating on the same commit. Useful for checking idempotent triggers or dropping large amount of tags.

tag.sh

#!/usr/bin/env bash

# tag.sh -t [email protected] -dcyv
#
# -d Deletes tags
# -c Creates tag on the same commit
# -y Non-interactive mode (always YES)
# -v Slightly increased verbosity

TAG=''
OPT_DEL=0
OPT_CREATE=0
YES_MAN=0
VERBOSE=0

while getopts ":dcyvt:" OPTION; do
  case "$OPTION" in
    t) # tag name
      TAG=$OPTARG
      ;;
    d) # drop tag
      OPT_DEL=1
      ;;
    c) # create same tag
      OPT_CREATE=1
      ;;
    y) # all yes
      YES_MAN=1
      ;;
    v) # verbose
      VERBOSE=1
      ;;
    \?) # Invalid option
      echo "Error: Invalid option -$OPTARG"
      exit;;
    :)
      echo "Missing option argument for -$OPTARG" >&2
      exit 1;;
    *)
      echo "Unimplemented option: -$option" >&2
      exit 1;;
  esac
done

if [ -z "${TAG}" ]; then
  echo "Empty tag! Aborting ...";
  exit 1
fi

COMMIT=$(git rev-list -n 1 "${TAG}")

if [ $? != 0 ] || [ -z "$COMMIT" ]; then
  echo '  Tag not found!'
  exit 2;
fi

echo "Tag: ${TAG} (${COMMIT})"

function confirm {
    while true; do
        read -p "$* [y/n]: " yn
        case $yn in
            [Yy]*) return 0 ;;
            [Nn]*) return 1 ;;
        esac
    done
}

if [[ $YES_MAN == 0 ]]; then
  confirm "Continue?"

  if [[ $? == 1 ]]; then
    echo "Aborted ..."
  fi
fi

if [[ $OPT_DEL == 1 ]]; then
  [[ $VERBOSE == 1 ]] && echo "- Removing remote tag"
  git push origin :$TAG

  if [[ $? != 0 ]]; then
    echo "  ! Failed to remove remote tag ..."
    exit 120
  fi

  [[ $VERBOSE == 1 ]] && echo "- Removing local tag"
  git tag -d $TAG

  if [[ $? != 0 ]]; then
    echo "  ! Failed to remove local tag ..."
    exit 121
  fi
fi

if [[ $OPT_CREATE == 1 ]]; then
  [[ $VERBOSE == 1 ]] && echo "+ Re-creating tag"
  git tag ${TAG} ${COMMIT}

  if [[ $? != 0 ]]; then
    echo "  ! Failed to re-create tag ..."
    exit 122
  fi

  [[ $VERBOSE == 1 ]] && echo "+ Pushing tag"
  git push origin $TAG

  if [[ $? != 0 ]]; then
    echo "  ! Failed to push tag ..."
    exit 123
  fi
fi