[gentoo-dev] Reverse dependency Scanning

[Spider]

Well,  this is something I spent quite a bit of time on yesterday, with
some help from bonsaikitten on figuring out the python madness.


Before ferringb tells it again, no, I know this isn't foolproof, cannot
be 100% in coverage, won't cover dlopen, conditional includes, bash
source inherit or other such fancy things that people do :)

However, it somewhat works ;)
What it does :
 given a list of files ( `etcat files category/package`  generates a
nice one ) it scans them, classifies into "scripts, perl, python,
libraries, executables" ,  then does its best to parse theese into
generating a list of -needed- files.

This means that it outputs a list of shared libraries linked against,
python modules imported, perl modules,  and script interpreters
( #!/bin/bash ...)

So,  taking that list you can then play around a bit with `qpkg -f` and
you'll end up with a nice list of packages that are actually used.


So, I know it isn't foolproof, don't expect it to be.  However, feedback
would be nice, patches and so on.   

oh, where it lives?  cvs : gentoo/users/spider/depreverse  , expects to
be ran from the current directory as it calls "./..."  for the included
scripts.

http://www.gentoo.org/cgi-bin/viewcvs.cgi/users/spider/depreverse/?root=gentoo


//Spider


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