Select Code to Download

$ visitcpan --append=dist -- perl -E 'say shift if -f "Build.PL"'

...
ABERGMAN/File-Find-Random-0.5.tar.gz
ABERGMAN/SVL-0.29.tar.gz
...

$ visitcpan -- perl -E 'if (-f "inc/Module/Install.pm") { say "MI" } e
+lsif (-f "Build.PL") { say "MB" } elsif (-f "Makefile.PL") { say "EUM
+M" }' | perl -E 'while (<>) { chomp; $cnt{$_}++ } say "$_: $cnt{$_}" 
+for keys %cnt'

MI: 2306
MB: 2675
EUMM: 11781