Count the lines of code of a rails project - in pure Ruby

rails_project_loc.rb

# Workflow:
#
# 1- if the path points to a directory
#   1.1- if the directory isn't in the exclusion list then: count LOC
#   1.2- else: prune directory
# 2- else
#   1.1- if the file extension is whitelisted then: count LOC
#   1.2- else: next

require 'find'

hidden_dir_char = '.'
total_loc       = 0

DIRECTORIES_TO_IGNORE = %W(node_modules tmp log storage public .git .idea).freeze
EXTENSIONS            = %W(erb rb css js html haml scss coffee yml).freeze

# rails path passed as argument or cwd path
rails_app_path = ARGV[0] || Dir.pwd

Find.find(rails_app_path) do |path|
  basename = File.basename(path)

  if FileTest.directory?(path)
    if basename[0] == hidden_dir_char ||
       DIRECTORIES_TO_IGNORE.include?(basename)
    then
      Find.prune
    else
      next
    end
  else
    next unless EXTENSIONS.include?(basename.split('.').last)
  end

  total_loc += File.foreach(path).count
end

puts "#{total_loc} LOC"

?> ruby rails_project_loc.rb "path/to/your/rails/project"

Feel free to have a look to my latest project HERE

Thank you for taking the time to read this Gist !