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App::lcpan::Cmd::deps - List dependencies


This document describes version 1.032 of App::lcpan::Cmd::deps (from Perl distribution App-lcpan), released on 2019-01-09.




 handle_cmd(%args) -> [status, msg, payload, meta]

List dependencies.

By default only runtime requires are displayed. To see prereqs for other phases (e.g. configure, or build, or ALL) or for other relationships (e.g. recommends, or ALL), use the --phase and --rel options.

Note that dependencies information are taken from META.json or META.yml files. Not all releases (especially older ones) contain them. lcpan (like MetaCPAN) does not extract information from Makefile.PL or Build.PL because that requires running (untrusted) code.

Also, some releases specify dynamic config, so there might actually be more dependencies.

This function is not exported.

Arguments ('*' denotes required arguments):

  • cpan => dirname

    Location of your local CPAN mirror, e.g. /path/to/cpan.

    Defaults to ~/cpan.

  • flatten => bool

    Instead of showing tree-like information, flatten it.

    When recursing, the default is to show the final result in a tree-like table, i.e. indented according to levels, e.g.:

     % lcpan deps -R MyModule
     | module            | author  | version |
     | Foo               | AUTHOR1 | 0.01    |
     |   Bar             | AUTHOR2 | 0.23    |
     |   Baz             | AUTHOR3 | 1.15    |
     | Qux               | AUTHOR2 | 0       |

    To be brief, if Qux happens to also depends on Bar, it will not be shown in the result. Thus we don't know the actual Bar version that is needed by the dependency tree of MyModule. For example, if Qux happens to depends on Bar version 0.45 then MyModule indirectly requires Bar 0.45.

    To list all the direct and indirect dependencies on a single flat list, with versions already resolved to the largest version required, use the flatten option:

     % lcpan deps -R --flatten MyModule
     | module            | author  | version |
     | Foo               | AUTHOR1 | 0.01    |
     | Bar               | AUTHOR2 | 0.45    |
     | Baz               | AUTHOR3 | 1.15    |
     | Qux               | AUTHOR2 | 0       |

    Note that Bar's required version is already 0.45 in the above example.

  • include_core => bool (default: 1)

    Include core modules.

  • include_noncore => bool (default: 1)

    Include non-core modules.

  • index_name => filename (default: "index.db")

    Filename of index.

    If index_name is a filename without any path, e.g. index.db then index will be located in the top-level of cpan. If index_name contains a path, e.g. ./index.db or /home/ujang/lcpan.db then the index will be located solely using the index_name.

  • level => int (default: 1)

    Recurse for a number of levels (-1 means unlimited).

  • modules* => array[perl::modname]

  • perl_version => str (default: "v5.26.1")

    Set base Perl version for determining core modules.

  • phase => str (default: "runtime")

  • rel => str (default: "requires")

  • use_bootstrap => bool (default: 1)

    Whether to use bootstrap database from App-lcpan-Bootstrap.

    If you are indexing your private CPAN-like repository, you want to turn this off.

  • with_xs_or_pp => bool

    Check each dependency as XS/PP.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (payload) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (any)


Please visit the project's homepage at https://metacpan.org/release/App-lcpan.


Source repository is at https://github.com/perlancar/perl-App-lcpan.


Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=App-lcpan

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.


perlancar <perlancar@cpan.org>


This software is copyright (c) 2019, 2018, 2017, 2016, 2015 by perlancar@cpan.org.

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