How to count lines of code? - ruby-on-rails

Question

I tried rake stats but that seems highly inaccurate. Perhaps it ignores several directories?

Answer 1

I use the free Perl script cloc. Sample usage:
phrogz$ cloc .
180 text files.
180 unique files.
77 files ignored.
http://cloc.sourceforge.net v 1.56 T=1.0 s (104.0 files/s, 19619.0 lines/s)
-------------------------------------------------------------------------------
Language files blank comment code
-------------------------------------------------------------------------------
Javascript 29 1774 1338 10456
Ruby 61 577 185 4055
CSS 10 118 133 783
HTML 1 13 3 140
DOS Batch 2 6 0 19
Bourne Shell 1 4 0 15
-------------------------------------------------------------------------------
SUM: 104 2492 1659 15468
-------------------------------------------------------------------------------

Answer 2

Here's a simple solution. It counts the lines of code in your rails project's app folder - CSS, Ruby, CoffeeScript, and all. At the root of your project, run this command:
find ./app -type f | xargs cat | wc -l
EDIT
Read the comments. Then try this instead:
find ./app -type f -name "*.rb" | xargs cat | sed "/^\s*\(#\|$\)/d" | wc -l

Answer 3

You can try out these two options:
Hack rake stats
Rakestats snippet from blogpost:
namespace :spec do
desc "Add files that DHH doesn't consider to be 'code' to stats"
task :statsetup do
require 'code_statistics'
class CodeStatistics
alias calculate_statistics_orig calculate_statistics
def calculate_statistics
#pairs.inject({}) do |stats, pair|
if 3 == pair.size
stats[pair.first] = calculate_directory_statistics(pair[1], pair[2]); stats
else
stats[pair.first] = calculate_directory_statistics(pair.last); stats
end
end
end
end
::STATS_DIRECTORIES << ['Views', 'app/views', /\.(rhtml|erb|rb)$/]
::STATS_DIRECTORIES << ['Test Fixtures', 'test/fixtures', /\.yml$/]
::STATS_DIRECTORIES << ['Email Fixtures', 'test/fixtures', /\.txt$/]
# note, I renamed all my rails-generated email fixtures to add .txt
::STATS_DIRECTORIES << ['Static HTML', 'public', /\.html$/]
::STATS_DIRECTORIES << ['Static CSS', 'public', /\.css$/]
# ::STATS_DIRECTORIES << ['Static JS', 'public', /\.js$/]
# prototype is ~5384 LOC all by itself - very hard to filter out
::CodeStatistics::TEST_TYPES << "Test Fixtures"
::CodeStatistics::TEST_TYPES << "Email Fixtures"
end
end
task :stats => "spec:statsetup"
metric_fu - A Ruby Gem for Easy Metric Report Generation
PS: I haven't tried any of the above, but metric_fu sounds interesting, see the screenshots of the output.

Answer 4

This one calculates number of files, total lines of code, comments, and average LOC per file. It also excludes files inside directories with "vendor" in their name.
Usage:
count_lines('rb')
Code:
def count_lines(ext)
o = 0 # Number of files
n = 0 # Number of lines of code
m = 0 # Number of lines of comments
files = Dir.glob('./**/*.' + ext)
files.each do |f|
next if f.index('vendor')
next if FileTest.directory?(f)
o += 1
i = 0
File.new(f).each_line do |line|
if line.strip[0] == '#'
m += 1
next
end
i += 1
end
n += i
end
puts "#{o.to_s} files."
puts "#{n.to_s} lines of code."
puts "#{(n.to_f/o.to_f).round(2)} LOC/file."
puts "#{m.to_s} lines of comments."
end

Answer 5

If your code is hosted on GitHub, you can use this line count website. Just enter your GitHub URL and wait for the result.
Example for Postgres: https://line-count.herokuapp.com/postgres/postgres
File Type Files Lines of Code Total lines
Text 1336 0 472106
C 1325 1069379 1351222
Perl 182 23917 32443
Shell 5 355 533
...