Inspired by Ohloh, and a need to start scoping migration of a large cluster of Drupal sites from Drupal 4.7 to Drupal 5.x/6.x, I've started some work on a static analysis / code metrics tool specifically intended for PHP / Drupal.

Code is available from Bryght's public svn repository, with repo URL https://svn.bryght.com/dev/svn/scripts/metrics.

The metrics.php program is currently implemented as a command line script, which is pointed at a directory containing code to be analyzed:

Reports are generated on standard output.

History

This code started from the sloccount.php script written by Arto Bendiken. I've tried to extend the script by making it more comprehensive and precise, but also more flexible and general. The architecture is intended to be pluggable, allowing users to easily write analysis tools for new types of files.

Currently there are two supported file types: generic, and PHP.

The 'generic' code analysis supports 'C' style code, with in-line comments initiated by '//' and comment blocks set of by '/*' and '*/'. This gives rough metrics for javascript and CSS files.

The PHP analyzer uses PHP's tokenizer and a rudimentary parser to obtain additional information about PHP code.

Analysis is completely separated from reporting: the analysis phase builds an array of metrics per file, where each metric can itself be structured.