NAME Module::CPANfile - Parse cpanfile SYNOPSIS use Module::CPANfile; my $file = Module::CPANfile->load("cpanfile"); my $prereqs = $file->prereqs; # CPAN::Meta::Prereqs object $file->merge_meta('MYMETA.json'); DESCRIPTION Module::CPANfile is a tool to handle cpanfile format to load application specific dependencies, not just for CPAN distributions. METHODS load $file = Module::CPANfile->load; $file = Module::CPANfile->load('cpanfile'); Load and parse a cpanfile. By default it tries to load "cpanfile" in the current directory, unless you pass the path to its argument. from_prereqs $file = Module::CPANfile->from_prereqs({ runtime => { requires => { DBI => '1.000' } }, }); Creates a new Module::CPANfile object from prereqs hash you can get via CPAN::Meta's "prereqs", or CPAN::Meta::Prereqs' "as_string_hash". # read MYMETA, then feed the prereqs to create Module::CPANfile my $meta = CPAN::Meta->load_file('MYMETA.json'); my $file = Module::CPANfile->from_prereqs($meta->prereqs); # load cpanfile, then recreate it with round-trip my $file = Module::CPANfile->load('cpanfile'); $file = Module::CPANfile->from_prereqs($file->prereq_specs); # or $file->prereqs->as_string_hash prereqs Returns CPAN::Meta::Prereqs object out of the parsed cpanfile. prereq_specs Returns a hash reference that should be passed to "CPAN::Meta::Prereqs->new". to_string($include_empty) $file->to_string; $file->to_string(1); Returns a canonical string (code) representation for cpanfile. Useful if you want to convert CPAN::Meta::Prereqs to a new cpanfile. # read MYMETA's prereqs and print cpanfile representation of it my $meta = CPAN::Meta->load_file('MYMETA.json'); my $file = Module::CPANfile->from_prereqs($meta->prereqs); print $file->to_sring; By default, it omits the phase where there're no modules registered. If you pass the argument of a true value, it will print them as well. save $file->save('cpanfile'); Saves the currently loaded prereqs as a new "cpanfile" by calling "to_string". Beware this method will overwrite the existing cpanfile without any warning or backup. Taking a backup or giving warnings to users is a caller's responsibility. # Read MYMETA.json and creates a new cpanfile my $meta = CPAN::Meta->load_file('MYMETA.json'); my $file = Module::CPANfile->from_prereqs($meta->prereqs); $file->save('cpanfile'); merge_meta $file->merge_meta('META.yml'); $file->merge_meta('MYMETA.json', '2.0'); Merge the effective prereqs with Meta speicifcation loaded from the given META file, using CPAN::Meta. You can specify the META spec version in the second argument, which defaults to 1.4 in case the given file is YAML, and 2 if it is JSON. AUTHOR Tatsuhiko Miyagawa SEE ALSO cpanfile, CPAN::Meta, CPAN::Meta::Spec