Using view_helper methods directly in a view_component file throws an error. We have to use helper.method_name to access the view helper method. So first we need to find helper methods that are used in the view_component.

check_presense_of_helper_methods.rb

# Script to get all function names from all helpers and check their presence in a specific file

def get_all_helper_functions
  all_helper_functions = []

  Dir[Rails.root.join("app", "helpers", "**", "*_helper.rb")].each do |helper_file|
    relative_path = Pathname.new(helper_file).relative_path_from(Rails.root.join("app", "helpers")).to_s
    helper_module_name = relative_path.chomp(".rb").camelize

    begin
      helper_module = helper_module_name.constantize
      methods = helper_module.instance_methods(false)
      methods.each do |method|
        all_helper_functions << "#{helper_module_name}##{method}"
      end
    rescue NameError => e
      puts "Warning: Couldn't load #{helper_module_name}: #{e.message}"
    end
  end

  all_helper_functions
end

def check_file_for_helper_functions(file_path, helper_functions)
  found_functions = []

  File.open(file_path, "r") do |file|
    file_content = file.read
    helper_functions.each do |func|
      module_name, method_name = func.split("#")
      if file_content.include?(method_name)
        found_functions << func
      end
    end
  end

  found_functions
end

all_helper_functions = get_all_helper_functions

file_name = "app/components/incidents/sidebar_component.html.erb"

file_path = Rails.root.join(file_name)

unless File.exist?(file_path)
  puts "Error: File does not exist: #{file_path}"
  exit
end

found_functions = check_file_for_helper_functions(file_path, all_helper_functions)

if found_functions.empty?
  puts "No helper functions found in the file: #{file_name}"
else
  puts "Helper functions found in the file #{file_name}:"
  found_functions.each { |func| puts "- #{func}" }
  puts "\nTotal helper functions found: #{found_functions.size}"
end

# We can run this by using rails runner check_presense_of_helper_methods.rb