Displays Heroku config vars as JSON, to make importing them into EJSON files easier

display_json_secrets.rb

require 'json'
require 'optparse'

options = {}
ARGV << '--help' if ARGV.empty?

OptionParser.new do |opts|
  opts.on('--heroku-app HEROKU_APP', String, 'Heroku app name') do |o|
    options[:heroku_app] = o
  end

  opts.on('--config-vars CONFIG_VARS', Array, 'comma separated list of Heroku config vars') do |o|
    options[:config_vars] = o
  end
end.parse!

unless options[:heroku_app]
  STDERR.puts "Missing --heroku-app"
  exit 1
end

unless options[:config_vars]
  STDERR.puts "Missing --config-vars"
  exit 1
end

secret_hash = {}
options[:config_vars].each do |config_var|
  secret_value = `heroku config:get #{config_var} --app #{options[:heroku_app]}`
  secret_hash[config_var] = secret_value.chomp
end

puts JSON.pretty_generate(secret_hash)