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Ohloh's source code line counter.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License Version 2 as
published by the Free Software Foundation.


Ohcount is specifically licensed under GPL v2.0, and no later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <>.


Ohcount is a library for counting lines of source code.
It was originally developed at Ohloh, and is used to generate
the reports at

Ohcount supports multiple languages within a single file: for example,
a complex HTML document might include regions of both CSS and JavaScript.

Ohcount has two main components: a detector which determines the primary
language family used by a particular source file, and a parser which
provides a line-by-line breakdown of the contents of a source file.

Ohcount includes a command line tool that allows you to count individual
files or whole directory trees. It also allows you to find source code
files by language family, or to create a detailed annotation of an
individual source file.

Ohcount includes a Ruby binding which allows you to directly access its
language detection features from a Ruby application.

System Requirements

Ohcount is supported on Ubuntu 18.04 LTS. It has also been tested on Fedora 29.
Other unix-like environments should also work, but your mileage may vary.

Ohcount does not support Windows.

Source Code

Ohcount source code is available as a Git repository:

  git clone git://

Building Ohcount

> Last updated: 2020-02-12

Ohcount targets `Ruby 2.*`. The ruby dev headers provided by Ubuntu/Fedora
package managers were found to be missing a `config.h` header file. If the
default ruby and ruby-dev packages do not work, install ruby using
brew/rbenv/asdf/rvm, which work reliably with ohcount.

You will need ragel 7.0 or higher, bash, gperf, libpcre3-dev, libmagic-dev,
gcc(version 7.3 or greater) and swig (>=3.0.0).
For older gcc versions one could try [this fix](

$ git clone git://
$ cd ohcount

For the ruby bindings, there is a dependency for the 'test-unit' gem:
$ gem install test-unit

#### Ubuntu/Debian

$ sudo apt-get install libpcre3 libpcre3-dev libmagic-dev gperf gcc ragel swig
$ ./build

### Fedora

$ sudo dnf install gcc file-devel gperf ragel swig pcre-devel
$ ./build

#### OSx

$ brew install libmagic pcre ragel swig
$ ./build

#### Other Unix systems

* If build fails with a missing `` error and any `ruby/x86.../` folder has the file, copy it to `ruby/` folder.

Using Ohcount

Once you've built ohcount, the executable program will be at bin/ohcount. The most basic use is to count lines of code in a directory tree. run:

$ bin/ohcount

Ohcount support several options. Run `ohcount --help` for more information.

Building Ruby and Python Libraries

To build the ruby wrapper:

$ ./build ruby

To build the python wrapper, run

$ python python/ build
$ python python/ install

The python wrapper is currently unsupported.