Inverting a dependency list

I recall, years ago, having a set of utilities that would build a call
tree from application code written in C. This was useful for figuring
out dependencies in code that someone else had written. I would like to
do something similar with a large PHP application I am now maintaining,
but with a slightly different emphasis.

This application includes several library files which contain more than
400 function declarations. I need to determine how many of those
functions are actually used by the application and which can be culled
from the code base. Is there an easy way to determine which of them are
called somewhere and then work through the call tree to identify the
orphans?

Bob McConnell

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Re: Inverting a dependency list

On Thu, Jul 16, 2009 at 12:09 PM, Bob McConnell wrote:
> I recall, years ago, having a set of utilities that would build a call
> tree from application code written in C. This was useful for figuring
> out dependencies in code that someone else had written. I would like to
> do something similar with a large PHP application I am now maintaining,
> but with a slightly different emphasis.
>
> This application includes several library files which contain more than
> 400 function declarations. I need to determine how many of those
> functions are actually used by the application and which can be culled
> from the code base. Is there an easy way to determine which of them are
> called somewhere and then work through the call tree to identify the
> orphans?
>
> Bob McConnell
>
> --
> PHP General Mailing List (http://www.php.net/)
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>

PHPUnit + Xdebug has a really nice code coverage generation. Perhaps
you could use the way phpunit hooks into xdebug to figure out likes
that get hit in the code base. I don't know of a simple, ready-made
solution off the top of my head though.

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http://www.ericbutera.us/

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