find_unused_helper_methods.rb

puts "Loading all source files into memory :("
source = {}
 
Dir["app/**/**/*.*"].reject { |f| f =~ /assets/ }.each do |f|
  source[ f ] = File.readlines( f )
end
 
puts "#{source.size} files loaded into memory"
 
 
helpers = []
 
source.keys.grep(/app\/helpers/).each do |f|
  code = source[ f ]
  code.each do |line|
    if line =~ /def ([^\(\s]+)/
      helpers << $1.chomp
    end
  end
end
 
puts "Scanning for #{helpers.size} helpers"
 
# combine the source code
complete_code = source.values.flatten
 
# Find occurances
helpers.each do |name|
  found = false
 
  complete_code.each do |line|
    next if line =~ /def #{name}/
    found = true if line =~ /#{name}/
  end
 
  puts "No traces found of #{name}..." unless found
end