Archival for CPAN is currently in development:
The Comprehensive Perl Archive Network <https://www.cpan.org/> is Perl’s main package manager.
CPAN packages archived by Software Heritage will be associated to the metacpan.org domain rather than
cpan.org in order to point to an original web page with information about the package.
This pattern of origin URLs is:
which references all versions of the same package.
metacpan.org is also used by Software Heritage to list packages, thanks to its ElasticSearch API.
CPAN does not seem to store any extrinsic metadata, beyond mapping between author username and package. Author name and email is present in intrinsic metadata and in release fields, anyway.
Source code from CPAN is currently only archived on Software Heritage’s staging infrastructure.