A simple script for finding non-v.X.Y.Z tags in a repository, renaming and replacing them

fix_versioning_tags.sh

#!/bin/bash

# A simple dumb tag clean-up utility that appends a 'v' to non X.Y.Z tags stored locally and remotely
# Written with love by Ed George - ed@himumsaiddad.com

# =========== =========== ===========
#              Constants
# =========== =========== ===========

# Reset
end="\033[0m"      # Text Reset

# Regular Colors
red="\033[0;31m"    # Red
green="\033[0;32m"  # Green
yellow="\033[0;33m" # Yellow    

# =========== =========== ===========
#               Methods
# =========== =========== ===========

function verbose {
  echo -e "${green}▶ ${1}${end}"
}

function warn {
  echo -e "${yellow}${1}${end}"
}

function error {
  echo -e "${red}${1}${end}"
}

function fatal {
  error "• FATAL: ${1}"
  exit 1
}

# Helper method for prompting continue
# EXAMPLE USAGE:
# prompt_confirm "Delete all tags? || exit 0
prompt_confirm() {
  echo -e "${yellow}"
  while true; do
    read -r -n 1 -p "${1:-Continue?} [y/n]: " REPLY
    case $REPLY in
      [yY]) echo -e "${end}" ; return 0 ;;
      [nN]) echo -e "${end}" ; return 1 ;;
      *) error "invalid input"
    esac 
  done 
  echo -e "${end}"
}

# Helper method for showing all local tags
show_local_tags(){
  verbose "Local tags" 
  git tag || fatal "Could not display local tags"
}

# =========== =========== ===========
#                Main
# =========== =========== ===========

verbose "Version Tag Cleanup"

# Check current directory is a git repo
git rev-parse --is-inside-work-tree 1>/dev/null || fatal "Current directory $(pwd) is not a git repo"

# Prune local tags that are not present on remote
prompt_confirm "Prune local tags that are not present on remote?" || exit 0
git fetch origin --prune --tags || fatal "Could not prune local tags"

# Get all tags from remote
verbose "Fetching tags from remote" 
git fetch --tags || fatal "Could not get remote tags"

show_local_tags

# Remove all remote tags that do not start with 'v' prefix
prompt_confirm "Remove all non vX.Y.Z tags on remote?" || exit 0
verbose "Removing all non-prefixed remote tags" 
git tag | grep -v v | xargs -n 1 -I% git push origin :refs/tags/% || fatal "Could not remove remote tags - you may need to 'git push --tags' to restore them"

# Create duplicate local tags by appending 'v'
prompt_confirm "Create replacement vX.Y.Z tags locally?" || exit 0
verbose "Creating prefixed local tags" 
git tag | grep -v v | xargs -n 1 -I% git tag v% % || fatal "Could not create local tags, run 'git tag' to see current local tags"

show_local_tags

# Remove all local tags that do not start with 'v' prefix
prompt_confirm "Remove all non vX.Y.Z tags locally and push changes?" || exit 0
verbose "Removing all non-prefixed local tags"  
git tag | grep -v v | xargs -n 1 -I% git tag -d % || fatal "Could not remove local non-prefixed tags, run 'git tag' to see current local tags"

# Push tags to remote
verbose "Pushing tags to remote" 
git push --tags || fatal "Could not push tags to remote"

show_local_tags

verbose "Completed cleanup"