Find unused Ruby methods in current project

check_methods.rb

skip_methods = %w(new create edit update destroy index show initialize to_s call as_json page per_page build up down change)

output = `grep -hir "^\s*def\s" *`

methods = output.split("\n")
puts "Found #{methods.size} methods."
ununsed_methods = []

methods.each_with_index do |line, i|
  line = line.gsub(/^\s*/, '')
             .gsub(/\(.*/, '')
             .gsub(/def /, '')
             .gsub(/self\./, '')

  next if skip_methods.include?(line)
  next if line[-1] == '='

  puts "(#{i}) Looking for #{line}."
  if `grep -hir "#{line}" *`.split("\n").size == 1
    puts "\tFound unused: #{line}"
    ununsed_methods << line
  end
end

puts "UNUSED METHODS:\n"
p ununsed_methods