/ 
URI-PackageURL-2.21
River stage one • 1 direct dependent • 1 total dependent
/ URI::PackageURL

NAME

URI::PackageURL - Perl extension for Package URL (aka "purl")

SYNOPSIS

use URI::PackageURL;

# OO-interface

# Encode components in Package URL string
$purl = URI::PackageURL->new(
  type      => cpan,
  namespace => 'GDT',
  name      => 'URI-PackageURL',
  version   => '2.21'
);

say $purl; # pkg:cpan/GDT/URI-PackageURL@2.20

# Parse Package URL string
$purl = URI::PackageURL->from_string('pkg:cpan/GDT/URI-PackageURL@2.20');

# exported functions

$purl = decode_purl('pkg:cpan/GDT/URI-PackageURL@2.20');
say $purl->type;  # cpan

$purl_string = encode_purl(type => cpan, name => 'URI::PackageURL', version => '2.21');
say $purl_string; # pkg:cpan/URI::PackageURL@2.20

DESCRIPTION

This module converts Package URL components to "purl" string and vice versa.

A Package URL (aka "purl") is a URL string used to identify and locate a software package in a mostly universal and uniform way across programing languages, package managers, packaging conventions, tools, APIs and databases.

https://github.com/package-url/purl-spec

A purl is a URL composed of seven components:

scheme:type/namespace/name@version?qualifiers#subpath

Components are separated by a specific character for unambiguous parsing.

The definition for each components is:

  • "scheme": this is the URL scheme with the constant value of "pkg". One of the primary reason for this single scheme is to facilitate the future official registration of the "pkg" scheme for package URLs. Required.

  • "type": the package "type" or package "protocol" such as cpan, maven, npm, nuget, gem, pypi, etc. Required.

  • "namespace": some name prefix such as a Maven groupid, a Docker image owner, a GitHub user or organization. Optional and type-specific.

  • "name": the name of the package. Required.

  • "version": the version of the package. Optional.

  • "qualifiers": extra qualifying data for a package such as an OS, architecture, a distro, etc. Optional and type-specific.

  • "subpath": extra subpath within a package, relative to the package root. Optional.

CPAN PURL TYPE

cpan is an official "purl" type (https://github.com/package-url/purl-spec/blob/master/PURL-TYPES.rst)

  • The default repository is https://www.cpan.org/.

  • The namespace:

    • To refer to a CPAN distribution name, the namespace MUST be present. In this case, the namespace is the CPAN id of the author/publisher. It MUST be written uppercase, followed by the distribution name in the name component. A distribution name MUST NOT contain the string ::.

    • To refer to a CPAN module, the namespace MUST be absent. The module name MAY contain zero or more :: strings, and the module name MUST NOT contain a -

  • The name is the module or distribution name and is case sensitive.

  • The version is the module or distribution version.

  • Optional qualifiers may include:

    • repository_url: CPAN/MetaCPAN/BackPAN/DarkPAN repository base URL (default is https://www.cpan.org)

    • download_url: URL of package or distribution

    • vcs_url: extra URL for a package version control system

    • ext: file extension (default is tar.gz)

Examples

pkg:cpan/Perl::Version@1.013
pkg:cpan/DROLSKY/DateTime@1.55
pkg:cpan/DateTime@1.55
pkg:cpan/GDT/URI-PackageURL
pkg:cpan/LWP::UserAgent
pkg:cpan/OALDERS/libwww-perl@6.76
pkg:cpan/URI

FUNCTIONAL INTERFACE

They are exported by default:

$purl_string = encode_purl(%purl_components)

Converts the given Package URL components to "purl" string. Croaks on error.

This function call is functionally identical to:

$purl_string = URI::PackageURL->new(%purl_components)->to_string;
$purl_components = decode_purl($purl_string)

Converts the given "purl" string to Package URL components. Croaks on error.

This function call is functionally identical to:

$purl = URI::PackageURL->from_string($purl_string);

OBJECT-ORIENTED INTERFACE

$purl = URI::PackageURL->new(%components)

Create new URI::PackageURL instance using provided Package URL components (type, name, version ,etc).

$purl->type

The package "type" or package "protocol" such as cpan, maven, npm, nuget, gem, pypi, etc.

$purl->namespace

Some name prefix such as a Maven groupid, a Docker image owner, a GitHub user or organization. Optional and type-specific.

$purl->name

The "name" of the package.

$purl->version

The "version" of the package.

$purl->qualifiers

Extra qualifying data for a package such as an OS, architecture, a distro, etc.

$purl->subpath

Extra subpath within a package, relative to the package root.

$purl->to_string

Stringify Package URL components.

$purl->to_urls

Return download and/or repository URLs.

$purl->TO_JSON

Helper method for JSON modules (JSON, JSON::PP, JSON::XS, Mojo::JSON, etc).

use Mojo::JSON qw(encode_json);

say encode_json($purl);  # {"name":"URI-PackageURL","namespace":"GDT","qualifiers":null,"subpath":null,"type":"cpan","version":"2.20"}
$purl = URI::PackageURL->from_string($purl_string);

Converts the given "purl" string to Package URL components. Croaks on error.

SUPPORT

Bugs / Feature Requests

Please report any bugs or feature requests through the issue tracker at https://github.com/giterlizzi/perl-URI-PackageURL/issues. You will be notified automatically of any progress on your issue.

Source Code

This is open source software. The code repository is available for public review and contribution under the terms of the license.

https://github.com/giterlizzi/perl-URI-PackageURL

git clone https://github.com/giterlizzi/perl-URI-PackageURL.git

AUTHOR

  • Giuseppe Di Terlizzi <gdt@cpan.org>

LICENSE AND COPYRIGHT

This software is copyright (c) 2022-2024 by Giuseppe Di Terlizzi.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.