Question

I would like to translate a Perl package name to the full path of the file.

say package_name_to_path('Foo::Bar::Baz'); /tmp/Foo/Bar/Baz.pm 

I know there is a CPAN module to do this? I just can’t find it again?

Answer 1

If you’ve loaded the module, just look in %INC but you have to do it by filename.

say $INC{'Foo/Bar/Baz.pm'}; 

If you haven’t, you can use Module::Util or the module_info program which comes with Module::Info.

$ module_info Module::Build  Name:        Module::Build Version:     0.30 Directory:   /usr/local/lib/site_perl File:        /usr/local/lib/site_perl/Module/Build.pm Core module: no 

Or you can go through @INC manually.

my $module = 'Foo::Bar';  # Convert from Foo::Bar to Foo/Bar.pm my $file   = $module; $file =~ s{::}{/}; $file .= '.pm';  my $path; for my $dir (@INC) {     $path = '$dir/$file';     last if -r $path;     $path = undef; }  say defined $path ? '$module is found at $path' : '$module not found'; 

(A fully cross platform solution would use File::Spec instead of joining with slashes.)

If you just need to find a module quick, perldoc -l works well as Fayland mentioned, but it will fail to find a module that has no POD.