in reply to Re: finding the absolute path to a module, from the module's, perspective
in thread finding the absolute path to a module, from the module's, perspective

Quote: BTW - an absolute path has no "perspective", its an absolute path.

What I meant by that statement is that I don't want the absolute path of the script that's calling the module, I want the absolute path of the module the script is calling - that's the difference in perspective.

Quote: Try it again, because that works. If it doesn't work for you, upgrade File::Spec.

Well, here's proof of what you're saying, I give you FOO.pm: 

package FOO; 
use File::Spec;

require Exporter; 
@ISA = qw(Exporter); 
@EXPORT = qw(bar); 

sub bar { 
    print File::Spec->rel2abs(__FILE__) . "\n";
}


1;

[download]
And here's a test cgi script: 
 
#!/usr/bin/perl 

use FOO; 

use CGI qw(:standard); 
print header(); 

FOO::bar();

[download]

Prints: /home/user/www/cgi-bin/test.pl

But (of course, sigh), my not as tiny program is still giving me the not-so-absolute path. It's almost as if it thinks the absolute path *starts* at the lib directory.

Hmm. I'll come post back if I can figure something else out, must be some weird gremlin hunting about.

 

-justin simoni
!skazat!

Replies are listed 'Best First'.
Re^3: finding the absolute path to a module, from the module's, perspective
by PodMaster (Abbot) on Sep 12, 2004 at 04:51 UTC
    Well it works for me. File::Spec 0.88, Cwd 2.20.

    What does it print for you from the commandline?

    Are you sure what you think is getting loaded is in fact getting loaded. Try appending 

    print "$_\n" for %INC";

    [download]
    Also, try just printing __FILE__

    MJD says "you can't just make shit up and expect the computer to know what you mean, retardo!"
    I run a Win32 PPM repository for perl 5.6.x and 5.8.x -- I take requests (README).
    ** The third rule of perl club is a statement of fact: pod is sexy.

[reply]
[d/l]

      This is pretty weird, but I think I've figured it out;

      doing a, 

       
print __FILE__;

      [download]
      inside my module will return something like: 
       
/lib/Stuff/Template.pm
      File::Spec has a method called, file_name_is_absolute(), which basically on Unix, looks for a '/' as the first character -> 
       
sub file_name_is_absolute {
    my ($self,$file) = @_;
    return scalar($file =~ m:^/:s);
}

      [download]

      File::Spec will consult this method before it tries to piece together a absolute path; thus, File::Spec isn't even attempting to make an absolute path from the information from __FILE__

      The workaround I've done is simply to hack the first, '/' off.

      Changing my FOO.pm to something like: 

       
package FOO; 
use File::Spec;

require Exporter; 
@ISA = qw(Exporter); 
@EXPORT = qw(bar); 

sub bar { 
    print __FILE__; 
    print '<p>';
    print File::Spec->rel2abs(__FILE__) . "\n";
}


1;

      [download]
      Will print:

      lib/FOO.pm

      /usr/home/user/www/cgi-bin/lib/FOO.pm

      So, it doesn't look like it's *really* File::Spec's fault, but what would cause Perl to put a '/' at the beginning of the path in my module?

      Hmm...

       

      -justin simoni
      !skazat!

[reply]
[d/l]
[select]
        what would cause Perl to put a '/' at the beginning of the path in my module?
        chroot? mod_perl?
[reply]

In Section Seekers of Perl Wisdom