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CPAN::Meta::Prereqs(3perl) Perl Programmers Reference Guide CPAN::Meta::Prereqs(3perl)
NAME
CPAN::Meta::Prereqs - a set of distribution prerequisites by phase and type
VERSION
version 2.150010
DESCRIPTION
A CPAN::Meta::Prereqs object represents the prerequisites for a CPAN distribution or one
of its optional features. Each set of prereqs is organized by phase and type, as
described in CPAN::Meta::Prereqs.
METHODS
new
my $prereq = CPAN::Meta::Prereqs->new( \%prereq_spec );
This method returns a new set of Prereqs. The input should look like the contents of the
"prereqs" field described in CPAN::Meta::Spec, meaning something more or less like this:
my $prereq = CPAN::Meta::Prereqs->new({
runtime => {
requires => {
'Some::Module' => '1.234',
...,
},
...,
},
...,
});
You can also construct an empty set of prereqs with:
my $prereqs = CPAN::Meta::Prereqs->new;
This empty set of prereqs is useful for accumulating new prereqs before finally dumping
the whole set into a structure or string.
requirements_for
my $requirements = $prereqs->requirements_for( $phase, $type );
This method returns a CPAN::Meta::Requirements object for the given phase/type
combination. If no prerequisites are registered for that combination, a new
CPAN::Meta::Requirements object will be returned, and it may be added to as needed.
If $phase or $type are undefined or otherwise invalid, an exception will be raised.
phases
my @phases = $prereqs->phases;
This method returns the list of all phases currently populated in the prereqs object,
suitable for iterating.
types_in
my @runtime_types = $prereqs->types_in('runtime');
This method returns the list of all types currently populated in the prereqs object for
the provided phase, suitable for iterating.
with_merged_prereqs
my $new_prereqs = $prereqs->with_merged_prereqs( $other_prereqs );
my $new_prereqs = $prereqs->with_merged_prereqs( \@other_prereqs );
This method returns a new CPAN::Meta::Prereqs objects in which all the other prerequisites
given are merged into the current set. This is primarily provided for combining a
distribution's core prereqs with the prereqs of one of its optional features.
The new prereqs object has no ties to the originals, and altering it further will not
alter them.
merged_requirements
my $new_reqs = $prereqs->merged_requirements( \@phases, \@types );
my $new_reqs = $prereqs->merged_requirements( \@phases );
my $new_reqs = $prereqs->merged_requirements();
This method joins together all requirements across a number of phases and types into a new
CPAN::Meta::Requirements object. If arguments are omitted, it defaults to "runtime",
"build" and "test" for phases and "requires" and "recommends" for types.
as_string_hash
This method returns a hashref containing structures suitable for dumping into a distmeta
data structure. It is made up of hashes and strings, only; there will be no Prereqs,
CPAN::Meta::Requirements, or "version" objects inside it.
is_finalized
This method returns true if the set of prereqs has been marked "finalized," and cannot be
altered.
finalize
Calling "finalize" on a Prereqs object will close it for further modification. Attempting
to make any changes that would actually alter the prereqs will result in an exception
being thrown.
clone
my $cloned_prereqs = $prereqs->clone;
This method returns a Prereqs object that is identical to the original object, but can be
altered without affecting the original object. Finalization does not survive cloning,
meaning that you may clone a finalized set of prereqs and then modify the clone.
BUGS
Please report any bugs or feature using the CPAN Request Tracker. Bugs can be submitted
through the web interface at <http://rt.cpan.org/Dist/Display.html?Queue=CPAN-Meta>
When submitting a bug or request, please include a test-file or a patch to an existing
test-file that illustrates the bug or desired feature.
AUTHORS
o David Golden <dagolden AT cpan.org>
o Ricardo Signes <rjbs AT cpan.org>
o Adam Kennedy <adamk AT cpan.org>
COPYRIGHT AND LICENSE
This software is copyright (c) 2010 by David Golden, Ricardo Signes, Adam Kennedy and
Contributors.
This is free software; you can redistribute it and/or modify it under the same terms as
the Perl 5 programming language system itself.
perl v5.34.0 2023-11-23 CPAN::Meta::Prereqs(3perl)
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On Apache
Under GNU General Public License
2024-12-12 17:05 @18.218.188.40 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)