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Ohcount

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.

License

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 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 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 http://www.gnu.org/licenses/.

Overview

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

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.

Language Support

See: src/languages.h

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.

Building Ohcount

$ git clone git://github.com/blackducksoftware/ohcount.git
$ cd ohcount

Dockerfile

One may use the bundled Dockerfile to build ohcount for Ubuntu:

$ docker build -t ohcount:ubuntu .

Manual build

Last updated: 2021-12-09

Ohcount needs Ruby 2.* to run tests. 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.

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 ohcount.so 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:

$ bin/ohcount path/to/directory

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/setup.py build
$ python python/setup.py install

The python wrapper is currently unsupported.

Contributing

Observe any existing PR contribution and emulate the pattern. For e.g. see this.
Run ./build to compile the ragel files.
While writing the test/expected_dir files, disable any whitespace/tab replacing options from your editor.
Ohcount output has tabs in it, so the test/expected_dir also needs to contain tab characters.
Sample format of test/expected_dir is as follows. There is a Tab character after dart, code & comment:

dart	code	void main() {
dart	comment	  // Line comment

Some editors convert Tab to Space. The following steps help ensure that the proper character is added. ** Open the file in Vim editor. ** Run :set list. This makes all hidden characters like Tab visible. ** Type dart, press ctrl+v followed by tab. ** Run the tests to confirm these changes: ./build tests.