CURI.pm6

        my @comp-units = (
                self!repository-version < 1
                ?? $lookup.lines.unique.map({
                        # Old, slower, repo format - must parse json meta data to determine name/auth/ver
                        my $dist = self.distribution($_);
                        CompUnit.new(
                            repo         => self,
                            short-name   => $spec.short-name,
                            auth         => $dist.meta<auth>,
                            version      => Version.new( $dist.meta<ver> || 0 ),
                            api          => Version.new( $dist.meta<api> || 0 ),
                            repo-id      => (
                                    $dist.meta<provides>{$spec.short-name}.values[0]<file>
                                ||  $dist.meta<files>{$spec.short-name}
                                ||  Any
                            ),
                            distribution => $dist,
                        )
                    })
                !! $lookup.dir.map({
                        # Faster repo format stores common data in a non-json format for quicker lookups
                        my ($ver, $auth, $api, $source, $checksum) = $_.slurp.split("\n");

                        my $dist = self!lazy-distribution($_.basename);
                        CompUnit.new(
                            repo         => self,
                            short-name   => $spec.short-name,
                            auth         => $auth,
                            version      => Version.new( $ver || 0 ),
                            api          => Version.new( $api || 0 ),
                            repo-id      => $source,
                            distribution => $dist,
                            checksum     => $checksum,
                        )
                    })
            );