Determining module dependencies

[echo]

I'm soon to install an application on a box on which has no Internet access. Therefore my plan is to bring along a CD with tarballs for all the modules my application requires. I'd like to be make sure I have all the dependencies covered though, is there a way to determine them in advance?

[Fletch]

END { print "$_ => $INC{$_}" for sort keys %INC }

Or getting slightly fancy (but not foolproof)

package DumpPkgs;

use Filter::Util::Call;

sub import {
  my( $type ) = @_;
  filter_add( bless { } );
}

sub filter {
  my $self = shift;
  my $status;

  if( ($status = filter_read()) > 0 ) {
     print "Used $1\n" while /use\s+(\S+)/g
  }

  $status;
}
1;

You also could use the CPAN.pm autobundle command to generate a bundle of what's currently installed on the machine.

[MZSanford]

You could run your code under the debugger and use the V command to examine what is being loaded ... or, you could add some code (maybe in an END block) to print out the contents of %INC (i think it holds that info)

Last thought would be to use perl -Dp and some grepping.

---

The requirements change because they don't know what they want, or how much they own you.

[andreychek]

This isn't anywhere near as slick as fletch's solution.. however, I know you're a mod_perl guy.. so if you have your application running under mod_perl, you could always make use of mod_perl's status page, which lists all the loaded modules.

Althought I know you know this, for the benefit of everyone else, you can put this code into your httpd.conf to give yourself access to a mod_perl status report:


 
 <Location /perl-status>
   SetHandler  perl-script
   PerlHandler Apache::Status
 </Location>

Then you just fire up your browser, and wander over to http://www.mydomain.com/perl-status.

So if project X that you're working on now is the only Perl app loaded under mod_perl, it'd be pretty simple to figure out which modules it's using.

TMTOWTDI ;-)

-Eric

[Anonymous Monk]

Get Devel::Modlist and then run

perl -d:Modlist=stop,path script.pl

which should give you all modules along with their path for script.pl.
The advantage is that you don't have to know all the modules installed.

artist