Beefy Boxes and Bandwidth Generously Provided by pair Networks
We don't bite newbies here... much

Re: Checking for PERL Modules

by epoptai (Curate)
on Jul 19, 2002 at 18:47 UTC ( #183370=note: print w/ replies, xml ) Need Help??

in reply to Checking for PERL Modules

You can check for the existence of a module with eval:
eval "use Some::Module"; $@ && print_an_error_message_with_a_nice_link_to_cpan();

Here's another technique for using non-core modules that fits in better with the other module calls, and is able to report multiple missing modules:

#!/usr/bin/perl -w use strict; use CGI ':standard'; use_('Some::Module'); use_('Some::OtherModule'); install_modules() if %_; # if use_ fails this happens sub use_ { eval "use $_[0]"; $@ && $_{$_[0]}++; undef $@ } sub install_modules { # link to dist(s) on cpan if(keys %_ > 1){ $_ = 's' } else { $_ = '' } my $p = header; $p .= qq~Required perl module$_ not found: ~; for(keys %_){ $p .= qq~<a href='$_'>$_</a>, ~ +; } $p =~ s|, $||; print $p; exit }
Hope this helps.

Update: Cleaned it up a bit.

Check out my Perlmonks Related Scripts like framechat, reputer, and xNN.

Comment on Re: Checking for PERL Modules
Select or Download Code

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://183370]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others having an uproarious good time at the Monastery: (6)
As of 2016-05-28 11:10 GMT
Find Nodes?
    Voting Booth?