update_status.thor

class ComponentStatusMigratorGenerator < Thor::Group
  include Thor::Actions

  # Define arguments and options
  argument :name
  class_option :status, default: "alpha", desc: "Status of the component. One of alpha, beta or stable"

  def self.source_root
    File.dirname(__FILE__)
  end

  def find_file
    raise unless File.exist?("app/components/primer/#{name.underscore}.rb")
    puts "File found!"
  end

  def move_controller
    raise unless File.exist?(controller_path)

    copy_file(controller_path, controller_path_with_status)
    remove_file(controller_path)
  end

  def move_template
    raise unless File.exist?(template_path)

    copy_file(template_path, template_path_with_status)
    remove_file(template_path)
  end

  def move_test
    raise unless File.exist?(test_path)

    copy_file(test_path, test_path_with_status)
    remove_file(test_path)
  end

  def move_story
    raise unless File.exist?(story_path)

    copy_file(story_path, story_path_with_status)
    remove_file(story_path)
  end

  def add_module
    insert_into_file(controller_path_with_status, "  module #{status.capitalize}\n", after: "module Primer\n")
    append_to_file(controller_path_with_status, "end\n")
  end

  def remove_suffix
    gsub_file(controller_path_with_status, "class #{name}", name_without_suffix
  end

  def rename_test_class
    # gsub like above
  end

  def add_require_to_story
    insert_into_file(story_path_with_stats, "require \"primer/#{status}/#{name_without_suffix.underscore}\"\n", after: "# frozen_string_literal: true\n")
  end

  def update_all_calls
    # either use `run` https://rubydoc.info/github/wycats/thor/master/Thor/Actions#run-instance_method
    # or use `run_ruby_script` https://rubydoc.info/github/wycats/thor/master/Thor/Actions#run_ruby_script-instance_method
    # to run a regex in all dirs
  end

  def rename_nav_entry
    # another gsub_file
  end

  private

  def controller_path
    "app/components/primer/#{name.underscore}.rb"
  end

  def controller_path_with_status
    "app/components/primer/#{status}/#{name_without_suffix.underscore}.rb"
  end

  def status
    options[:status]
  end
  
  def name_without_suffix
    name.gsub("Component", "")
  end
end

https://rubydoc.info/github/wycats/thor/master/Thor/Actions for docs on thor calls