Count total number of lines in a project

rakefile.rb

def count_number_of_lines(path, suffix)
	count = 0
	Dir.chdir(path) do
		cmd = 'find . -type f -name "*.SUFFIX" -print0 | xargs -0 cat | wc -l'
		cmd.gsub!('SUFFIX', suffix)
		result = `#{cmd}`
		count = result.to_i
	end
	return count
end

desc "Count the number of lines in this project"
task :lines do
	path_suffix_array = [
		['app_ios/classes', 'm'],
		['app_ios/classes', 'h'],
		['app_ios/classes', 'swift'],
		['server', 'erl'],
	]
	results = path_suffix_array.map do |path_suffix|
		path, suffix = path_suffix
		count_number_of_lines(path, suffix)
	end
	total_count = results.inject(0) { |accum, count| accum + count }
	
	results.zip(path_suffix_array).each do |count, path_suffix|
		path, suffix = path_suffix
		puts "  %6d  %-18s .%s" % [count, path, suffix]
	end
	puts "---------------------------------"
	puts "  %6d  total" % total_count
end