[OctDev] octave-which : print paths of loaded functions

[Rafael L. <lab...@mp...>]

I do not now if there is already something similar to this in octave-forge,
but the script attached below might be a good contribution.

Sometimes, I need to now which files have been loaded by a given Octave
script, like in cases I need to send teh script to someone else and it
calls some functions not available to the recipient.

The Perl script below do that.  Better explaining with an exemple:

    $ cat testfun.m 
    function x=testfun;x=0;endfunction
    $ cat testscript.m 
    is_scalar(testfun)
    $ octave-which testscript.m
    /usr/share/octave/2.1.36/m/general/is_scalar.m
    /home/rafael/octave/testfun.m

It also accepts input from stdin:

    $ octave-which < testscript.m       
    /usr/share/octave/2.1.36/m/general/is_scalar.m
    /home/rafael/octave/testfun.m

If another octave command is needed, use a second argument:

    $ octave-which testscript.m octave-2.0.17
    /usr/share/octave/2.0.17/m/general/is_scalar.m
    /home/rafael/octave/testfun.m

If stdin is desired along with an alternate octave command, use '-' as the
script name:

    $ cat testscript.m | octave-which - octave-2.1.36
    /usr/share/octave/2.1.36/m/general/is_scalar.m
    /home/rafael/octave/testfun.m

At any rate:

    $ octave-which --help
    Usage: octave-which [script [octave-command]
    
    octave-which runs the Octave script specified as the first argument
    and print a list of paths for the user defined functions loaded in
    the script.  If no argument is given, the Octave commands are read
    from stdin.  An alternative Octave executable can be given as
    second argument.  If stdin is wanted in this case, use '-' at the
    place of the script filename.

    
Comments/enhacements are welcome.
    
-- 
Rafael Laboissiere