Re: [PBML] What modules
>>>>> "Dukelow," == Dukelow, Don <dukelow@...> writes:Dukelow,> I deal with quit a few servers all of which have several versions of
Dukelow,> Perl on them so I know about the -v and -V options. But is there a
Dukelow,> command or something to see what modules have been installed.
You need to learn about the Perl FAQ. You should be reading at least the
table of contents of the FAQ weekly until you know what's in there:
And you can search the faq with "perldoc -q". For example, "perldoc -q
Found in /usr/libdata/perl5/pod/perlfaq3.pod
How do I find which modules are installed on my system?
You can use the ExtUtils::Installed module to show all installed
distributions, although it can take awhile to do its magic. The standard
library which comes with Perl just shows up as "Perl" (although you can
get those with Module::CoreList).
my $inst = ExtUtils::Installed->new();
my @modules = $inst->modules();
If you want a list of all of the Perl module filenames, you can use
my @files = File::Find::Rule->file()->name( '*.pm' )->in( @INC );
If you do not have that module, you can do the same thing with
File::Find which is part of the standard library.
push @files, $File::Find::name
if -f $File::Find::name && /\.pm$/
print join "\n", @files;
If you simply need to quickly check to see if a module is available, you
can check for its documentation. If you can read the documentation the
module is most likely installed. If you cannot read the documentation,
the module might not have any (in rare cases).
prompt% perldoc Module::Name
You can also try to include the module in a one-liner to see if perl
perl -MModule::Name -e1
Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
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