Determining what file contains a module/class

[Nicholas Wieland]

Hi *,
I need to find the file that contains a known module or class, to
"inspect" the source code and extract what I need from the file.
Something like:

>> require 'digest'
>> Digest::base_file
'/usr/local/lib/ruby/1.8/digest.rb'

I already had some suggestions on IRC that involve scanning through all
the files in the path with a regexp, and in fact it solves my problem,
but I think it's a bit overcomplicated, so I'd like to know if there's
some other way that avoids all that scanning.

TIA,
ngw

--
checking for life_signs in -lKenny... no
Oh my god, make (1) killed Kenny ! You, bastards !

nicholas_wieland-at-yahoo-dot-it

[Austin Ziegler]

On 5/21/05, Nicholas Wieland <nicholas...@yahoo.it> wrote:
> Hi *,
> I need to find the file that contains a known module or class, to
> "inspect" the source code and extract what I need from the file.
> Something like:
>
> >> require 'digest'
> >> Digest::base_file
> '/usr/local/lib/ruby/1.8/digest.rb'

The problem in this case is that digest is specifically in digest.so,
not digest.rb. It also doesn't help if a module or class is defined
across multiple files, which is certainly permitted in Ruby.

-austin
--
Austin Ziegler * halos...@gmail.com
* Alternate: aus...@halostatue.ca

[gene...@gmail.com]

For ruby-coded classes/modules only, Hugh Sasse's comprehensive RDOC of
every file/ class/method (builtins only, no Std. Lib):

http://www.eng.cse.dmu.ac.uk/~hgs/ruby/RUBY_SNAPSHOT_RDOC/index.html

(Also not sure which 1.8 snapshot this is)

[Nicholas Wieland]

- Austin Ziegler :

> On 5/21/05, Nicholas Wieland <nicholas...@yahoo.it> wrote:
> > Hi *,
> > I need to find the file that contains a known module or class, to
> > "inspect" the source code and extract what I need from the file.
> > Something like:
> >
> > >> require 'digest'
> > >> Digest::base_file
> > '/usr/local/lib/ruby/1.8/digest.rb'
>
> The problem in this case is that digest is specifically in digest.so,
> not digest.rb. It also doesn't help if a module or class is defined
> across multiple files, which is certainly permitted in Ruby.

Well, I've used digest just to make an example, my question was more
general :=)
Actually I'm using something like:

SCRIPT_LINES__ = {}
require 'net/ftp'
SCRIPT_LINES__.keys

that solves two problems in one.

TIA,
ngw

--
checking for life_signs in -lKenny... no
Oh my god, make (1) killed Kenny ! You, bastards !

nicholas_wieland-at-yahoo-dot-it

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[Eric Mahurin]

If you wanted to do it like you initially wanted, you could
redefine require to get the filenames from SCRIPT_LINES__ (as
above) and get the new classes added from
ObjectSpace.each_object(Class). Based on that you could add
the base_file method. But, you'd only be able to detect when a
new class is added and not when it is being modified.

With that SCRIPT_LINES__ Hash, it doesn't look like you even
need to read the files since the file content is already in
SCRIPT_LINES__.

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