Scanning Dependencies

cpanm 1.4 has the new option --scandeps to scan and show the dependency graph in the console.

NOTE that this option takes into account what you already have in your perl library path, so if you already have Moose, running cpanm --scandeps Foo wouldn't display Moose even if the Foo module depends on Moose.

If you want the dependency tree for a vanilla perl installation, you can combine this option with -L, like:

cpanm -q --scandeps -L /tmp/perl5 Catalyst

which will print all of the non-core dependencies, instead of what you don't have. See also [[Module::Build with -L].