Perl::Metrics::Lite is the pluggable perl code metrics system.

Perl::Metrics::Lite provides just enough methods to run static
analysis of one or many Perl files and obtain a few metrics.

Perl::Metrics::Lite is far simpler than Perl::Metrics and more
extensible than Perl::Metrics::Simple.

WWW: https://metacpan.org/release/Perl-Metrics-Lite