get a list of all packages, and then list which file defines each package

get a list of all packages

Use Devel::Symdump's packages()

what file is that package defined in?

• %INC is close to what I want, but it doesn't include any package that is defined but not 'use'd, typically because it's a 2nd/3rd/4th package in that file.

What file is one of that package's subroutines defined in?

• Sub::Identify's get_code_location()

Unorganized / TODO: explore

• https://metacpan.org/pod/Module::Info