Script to copy environment variables from an existing heroku app to another one

heroku_env_copy.rb

# https://emirkarsiyakali.com/heroku-copying-environment-variables-from-an-existing-app-to-another-9253929198d9
# Bash script
heroku config -s -a existing-heroku-app > config.txt
cat config.txt | tr '\n' ' ' | xargs heroku config:set -a new-heroku-app


# Ruby Script
#!/usr/bin/env ruby

require 'json'

source_app = ARGV[0]
dest_app = ARGV[1]
ignore = %w(DATABASE_URL)

vars = JSON.parse `heroku config --app #{source_app} --json`
vars.each do |key, value|
  next if ignore.include?(key)
  `heroku config:set #{key}="#{value}" --app #{dest_app}`
end