This scripts show the list of plugins deployed in a Jenkins instance

list_jenkins_plugins.rb

#!/usr/bin/env ruby

require 'yaml'

jenkins_server_hiera_config_file_name = File.expand_path('~/workspace/4iq/devops/cm/puppet/modules/puppet_control/data/role/jenkinsserver.yaml')
current_plugin_list                   = File.expand_path('./jenkins_server_deployed_plugins.lst')
plugins_deployed                      = YAML.load_file(jenkins_server_hiera_config_file_name)['jenkins_server::plugins'].keys.sort
plugins_self_deployed                 = [
  'credentials',
  'swarm'
]

File.open(current_plugin_list).each do |line|
  plugin = line.split.first
  puts plugin unless plugins_self_deployed.include?(plugin) || plugins_deployed.include?(plugin)
end