1CPAN::Meta::RequirementUss(e3r)Contributed Perl DocumentCaPtAiNo:n:Meta::Requirements(3)
2
6 CPAN::Meta::Requirements - a set of version requirements for a CPAN
7 dist
8
10 version 2.140
11
13 use CPAN::Meta::Requirements;
14 my $build_requires = CPAN::Meta::Requirements->new;
16 $build_requires->add_minimum('Library::Foo' => 1.208);
18 $build_requires->add_minimum('Library::Foo' => 2.602);
20 $build_requires->add_minimum('Module::Bar' => 'v1.2.3');
22 $METAyml->{build_requires} = $build_requires->as_string_hash;
24
26 A CPAN::Meta::Requirements object models a set of version constraints
27 like those specified in the META.yml or META.json files in CPAN
28 distributions, and as defined by CPAN::Meta::Spec; It can be built up
29 by adding more and more constraints, and it will reduce them to the
30 simplest representation.
31 Logically impossible constraints will be identified immediately by
33 thrown exceptions.
34
36 new
37 my $req = CPAN::Meta::Requirements->new;
38 This returns a new CPAN::Meta::Requirements object. It takes an
40 optional hash reference argument. Currently, only one key is
41 supported:
42 • "bad_version_hook" -- if provided, when a version cannot be parsed
44 into a version object, this code reference will be called with the
45 invalid version string as first argument, and the module name as
46 second argument. It must return a valid version object.
47 All other keys are ignored.
49 add_minimum
51 $req->add_minimum( $module => $version );
52 This adds a new minimum version requirement. If the new requirement is
54 redundant to the existing specification, this has no effect.
55 Minimum requirements are inclusive. $version is required, along with
57 any greater version number.
58 This method returns the requirements object.
60 add_maximum
62 $req->add_maximum( $module => $version );
63 This adds a new maximum version requirement. If the new requirement is
65 redundant to the existing specification, this has no effect.
66 Maximum requirements are inclusive. No version strictly greater than
68 the given version is allowed.
69 This method returns the requirements object.
71 add_exclusion
73 $req->add_exclusion( $module => $version );
74 This adds a new excluded version. For example, you might use these
76 three method calls:
77 $req->add_minimum( $module => '1.00' );
79 $req->add_maximum( $module => '1.82' );
80 $req->add_exclusion( $module => '1.75' );
82 Any version between 1.00 and 1.82 inclusive would be acceptable, except
84 for 1.75.
85 This method returns the requirements object.
87 exact_version
89 $req->exact_version( $module => $version );
90 This sets the version required for the given module to exactly the
92 given version. No other version would be considered acceptable.
93 This method returns the requirements object.
95 add_requirements
97 $req->add_requirements( $another_req_object );
98 This method adds all the requirements in the given
100 CPAN::Meta::Requirements object to the requirements object on which it
101 was called. If there are any conflicts, an exception is thrown.
102 This method returns the requirements object.
104 accepts_module
106 my $bool = $req->accepts_module($module => $version);
107 Given an module and version, this method returns true if the version
109 specification for the module accepts the provided version. In other
110 words, given:
111 Module => '>= 1.00, < 2.00'
113 We will accept 1.00 and 1.75 but not 0.50 or 2.00.
115 For modules that do not appear in the requirements, this method will
117 return true.
118 clear_requirement
120 $req->clear_requirement( $module );
121 This removes the requirement for a given module from the object.
123 This method returns the requirements object.
125 requirements_for_module
127 $req->requirements_for_module( $module );
128 This returns a string containing the version requirements for a given
130 module in the format described in CPAN::Meta::Spec or undef if the
131 given module has no requirements. This should only be used for
132 informational purposes such as error messages and should not be
133 interpreted or used for comparison (see "accepts_module" instead).
134 structured_requirements_for_module
136 $req->structured_requirements_for_module( $module );
137 This returns a data structure containing the version requirements for a
139 given module or undef if the given module has no requirements. This
140 should not be used for version checks (see "accepts_module" instead).
141 Added in version 2.134.
143 required_modules
145 This method returns a list of all the modules for which requirements
146 have been specified.
147 clone
149 $req->clone;
150 This method returns a clone of the invocant. The clone and the
152 original object can then be changed independent of one another.
153 is_simple
155 This method returns true if and only if all requirements are inclusive
156 minimums -- that is, if their string expression is just the version
157 number.
158 is_finalized
160 This method returns true if the requirements have been finalized by
161 having the "finalize" method called on them.
162 finalize
164 This method marks the requirements finalized. Subsequent attempts to
165 change the requirements will be fatal, if they would result in a
166 change. If they would not alter the requirements, they have no effect.
167 If a finalized set of requirements is cloned, the cloned requirements
169 are not also finalized.
170 as_string_hash
172 This returns a reference to a hash describing the requirements using
173 the strings in the CPAN::Meta::Spec specification.
174 For example after the following program:
176 my $req = CPAN::Meta::Requirements->new;
178 $req->add_minimum('CPAN::Meta::Requirements' => 0.102);
180 $req->add_minimum('Library::Foo' => 1.208);
182 $req->add_maximum('Library::Foo' => 2.602);
184 $req->add_minimum('Module::Bar' => 'v1.2.3');
186 $req->add_exclusion('Module::Bar' => 'v1.2.8');
188 $req->exact_version('Xyzzy' => '6.01');
190 my $hashref = $req->as_string_hash;
192 $hashref would contain:
194 {
196 'CPAN::Meta::Requirements' => '0.102',
197 'Library::Foo' => '>= 1.208, <= 2.206',
198 'Module::Bar' => '>= v1.2.3, != v1.2.8',
199 'Xyzzy' => '== 6.01',
200 }
201 add_string_requirement
203 $req->add_string_requirement('Library::Foo' => '>= 1.208, <= 2.206');
204 $req->add_string_requirement('Library::Foo' => v1.208);
205 This method parses the passed in string and adds the appropriate
207 requirement for the given module. A version can be a Perl "v-string".
208 It understands version ranges as described in the "Version Ranges" in
209 CPAN::Meta::Spec. For example:
210 1.3
212 >= 1.3
213 <= 1.3
214 == 1.3
215 != 1.3
216 > 1.3
217 < 1.3
218 >= 1.3, != 1.5, <= 2.0
219 A version number without an operator is equivalent to specifying a
220 minimum (">="). Extra whitespace is allowed.
221 from_string_hash
223 my $req = CPAN::Meta::Requirements->from_string_hash( \%hash );
224 my $req = CPAN::Meta::Requirements->from_string_hash( \%hash, \%opts );
225 This is an alternate constructor for a CPAN::Meta::Requirements object.
227 It takes a hash of module names and version requirement strings and
228 returns a new CPAN::Meta::Requirements object. As with
229 add_string_requirement, a version can be a Perl "v-string". Optionally,
230 you can supply a hash-reference of options, exactly as with the "new"
231 method.
232
234 Bugs / Feature Requests
235 Please report any bugs or feature requests through the issue tracker at
236 <https://github.com/Perl-Toolchain-Gang/CPAN-Meta-Requirements/issues>.
237 You will be notified automatically of any progress on your issue.
238 Source Code
240 This is open source software. The code repository is available for
241 public review and contribution under the terms of the license.
242 <https://github.com/Perl-Toolchain-Gang/CPAN-Meta-Requirements>
244 git clone https://github.com/Perl-Toolchain-Gang/CPAN-Meta-Requirements.git
246
248 • David Golden <dagolden@cpan.org>
249 • Ricardo Signes <rjbs@cpan.org>
251
253 • Ed J <mohawk2@users.noreply.github.com>
254 • Karen Etheridge <ether@cpan.org>
256 • Leon Timmermans <fawaka@gmail.com>
258 • robario <webmaster@robario.com>
260
262 This software is copyright (c) 2010 by David Golden and Ricardo Signes.
263 This is free software; you can redistribute it and/or modify it under
265 the same terms as the Perl 5 programming language system itself.
266perl v5.34.0 2021-07-22 CPAN::Meta::Requirements(3)