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Version::Requirements(3) User Contributed Perl Documentation Version::Requirements(3)
NAME
Version::Requirements - a set of version requirements for a CPAN dist
VERSION
version 0.101022
SYNOPSIS
use Version::Requirements;
my $build_requires = Version::Requirements->new;
$build_requires->add_minimum('Library::Foo' => 1.208);
$build_requires->add_minimum('Library::Foo' => 2.602);
$build_requires->add_minimum('Module::Bar' => 'v1.2.3');
$METAyml->{build_requires} = $build_requires->as_string_hash;
DESCRIPTION
A Version::Requirements object models a set of version constraints like those specified in
the META.yml or META.json files in CPAN distributions. It can be built up by adding more
and more constraints, and it will reduce them to the simplest representation.
Logically impossible constraints will be identified immediately by thrown exceptions.
METHODS
new
my $req = Version::Requirements->new;
This returns a new Version::Requirements object. It ignores any arguments given.
add_minimum
$req->add_minimum( $module => $version );
This adds a new minimum version requirement. If the new requirement is redundant to the
existing specification, this has no effect.
Minimum requirements are inclusive. $version is required, along with any greater version
number.
This method returns the requirements object.
add_maximum
$req->add_maximum( $module => $version );
This adds a new maximum version requirement. If the new requirement is redundant to the
existing specification, this has no effect.
Maximum requirements are inclusive. No version strictly greater than the given version is
allowed.
This method returns the requirements object.
add_exclusion
$req->add_exclusion( $module => $version );
This adds a new excluded version. For example, you might use these three method calls:
$req->add_minimum( $module => '1.00' );
$req->add_maximum( $module => '1.82' );
$req->add_exclusion( $module => '1.75' );
Any version between 1.00 and 1.82 inclusive would be acceptable, except for 1.75.
This method returns the requirements object.
exact_version
$req->exact_version( $module => $version );
This sets the version required for the given module to exactly the given version. No
other version would be considered acceptable.
This method returns the requirements object.
add_requirements
$req->add_requirements( $another_req_object );
This method adds all the requirements in the given Version::Requirements object to the
requirements object on which it was called. If there are any conflicts, an exception is
thrown.
This method returns the requirements object.
accepts_module
my $bool = $req->accepts_modules($module => $version);
Given an module and version, this method returns true if the version specification for the
module accepts the provided version. In other words, given:
Module => '>= 1.00, < 2.00'
We will accept 1.00 and 1.75 but not 0.50 or 2.00.
For modules that do not appear in the requirements, this method will return true.
clear_requirement
$req->clear_requirement( $module );
This removes the requirement for a given module from the object.
This method returns the requirements object.
required_modules
This method returns a list of all the modules for which requirements have been specified.
clone
$req->clone;
This method returns a clone of the invocant. The clone and the original object can then
be changed independent of one another.
is_simple
This method returns true if and only if all requirements are inclusive minimums -- that
is, if their string expression is just the version number.
is_finalized
This method returns true if the requirements have been finalized by having the "finalize"
method called on them.
finalize
This method marks the requirements finalized. Subsequent attempts to change the
requirements will be fatal, if they would result in a change. If they would not alter the
requirements, they have no effect.
If a finalized set of requirements is cloned, the cloned requirements are not also
finalized.
as_string_hash
This returns a reference to a hash describing the requirements using the strings in the
META.yml specification.
For example after the following program:
my $req = Version::Requirements->new;
$req->add_minimum('Version::Requirements' => 0.102);
$req->add_minimum('Library::Foo' => 1.208);
$req->add_maximum('Library::Foo' => 2.602);
$req->add_minimum('Module::Bar' => 'v1.2.3');
$req->add_exclusion('Module::Bar' => 'v1.2.8');
$req->exact_version('Xyzzy' => '6.01');
my $hashref = $req->as_string_hash;
$hashref would contain:
{
'Version::Requirements' => '0.102',
'Library::Foo' => '>= 1.208, <= 2.206',
'Module::Bar' => '>= v1.2.3, != v1.2.8',
'Xyzzy' => '== 6.01',
}
from_string_hash
my $req = Version::Requirements->from_string_hash( \%hash );
This is an alternate constructor for a Version::Requirements object. It takes a hash of
module names and version requirement strings and returns a new Version::Requirements
object.
AUTHOR
Ricardo Signes <rjbs AT cpan.org>
COPYRIGHT AND LICENSE
This software is copyright (c) 2010 by Ricardo Signes.
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 v5.16.3 2012-02-03 Version::Requirements(3)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2024-04-26 18:41 @3.144.248.24 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)