3 The Ohloh source code line counter
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License Version 2 as
7 published by the Free Software Foundation.
9 Ohcount is specifically licensed under GPL v2.0, and no later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 Ohcount is a library for counting lines of source code.
23 It was originally developed at Ohloh, and is used to generate
24 the reports at www.ohloh.net.
26 Ohcount supports multiple languages within a single file: for example,
27 a complex HTML document might include regions of both CSS and JavaScript.
29 Ohcount has two main components: a detector which determines the primary
30 language family used by a particular source file, and a parser which
31 provides a line-by-line breakdown of the contents of a source file.
33 Ohcount includes a command line tool that allows you to count individual
34 files or whole directory trees. It also allows you to find source code
35 files by language family, or to create a detailed annotation of an
36 individual source file.
38 Ohcount includes a Ruby binding which allows you to directly access its
39 language detection features from a Ruby application.
41 == System Requirements
43 Ohcount is supported on Mac OS X 10.4 and Ubuntu 6.06 LTS. Other Linux
44 environments should also work, but your mileage may vary.
46 Ohcount does not support Windows.
48 Ohcount targets Ruby 1.8.6. The build script targets Rake 0.7.3. You will
49 also require a C compiler to build the native extensions.
51 Ohcount requires the pcre library (http:///www.pcre.org).
55 The source code for ohcount is available as a tarball:
57 http://labs.ohloh.net/download/ohcount-1.0.0.tgz
59 You can also download the source code as a Git repository:
61 git clone http://git.ohloh.net/git/ohcount.git
65 Ohcount is packaged as a RubyGem. To build and install the gem (you will need
66 root priveleges for the install):
70 To uninstall the RubyGem:
72 $ gem uninstall ohcount
74 If you do not want to install the gem, you can simply build and run it like this:
81 To measure the lines of code, simply pass filenames or directory names
82 to the +ohcount+ script:
84 $ ohcount helloworld.c
86 Directories will be probed recursively. If you do not pass any parameters,
87 the current directory tree will be counted.
89 You can use the ohcount +detect+ option to simply determine the language
90 family of each source file. The files will not be parsed or counted.
91 For example, to find all of the ruby files in the current directory tree:
93 $ ohcount --detect | grep ^ruby
95 The +annotate+ option presents a line-by-line accounting
96 of the languages used in a source code file. For example:
98 $ ohcount --annotate ./test/src_dir/php1.php
100 == Loading ohcount from Ruby
102 If you have installed ohcount as a gem, you can load it like this:
107 If you have not installed the gem, you'll have to make sure that
108 ohcount is on your ruby load path and then require:
112 The <tt>bin/ohcount</tt> script shows examples of calling the ohcount
115 == How to Add a New Language
117 These are the steps required to add a new language to ohcount:
119 * Update Ohcount::Detector to identify files that use the new language.
120 * Update Ohcount::DetectorTest to confirm the Detector changes.
121 * In Ohcount::Generator, instantiate a new Ohcount::Monoglot or
122 Ohcount::Polyglot to parse the language.
123 * Create a new Ohcount::Test to verify the parser.
127 For more information visit the Ohloh website:
128 http://labs.ohloh.net
130 You can reach Ohloh via email at: