NAME
    Perinci::Sub::To::CLIDocData - From Rinci function metadata, generate
    structure convenient for producing CLI documentation (help/usage/POD)

VERSION
    This document describes version 0.298 of Perinci::Sub::To::CLIDocData
    (from Perl distribution Perinci-Sub-To-CLIDocData), released on
    2021-07-11.

SYNOPSIS
     use Perinci::Sub::To::CLIDocData qw(gen_cli_doc_data_from_meta);
     my $clidocdata = gen_cli_doc_data_from_meta(meta => $meta);

    Sample function metadata ($meta):

     {
       args => {
         bool1 => {
                    cmdline_aliases => { z => { summary => "This is summary for option `-z`" } },
                    schema => "bool",
                    summary => "Another bool option",
                    tags => ["category:cat1"],
                  },
         flag1 => {
                    cmdline_aliases => { f => {} },
                    schema => ["bool", "is", 1],
                    tags => ["category:cat1"],
                  },
         str1  => {
                    pos => 0,
                    req => 1,
                    schema => "str*",
                    summary => "A required option as well as positional argument",
                  },
       },
       examples => [
         {
           argv    => ["a value", "--bool1"],
           summary => "Summary for an example",
           test    => 0,
         },
       ],
       summary => "Function summary",
       v => 1.1,
     }
    Sample result:

     do {
       my $a = [
         200,
         "OK",
         {
           "compact_usage_line" => "[[prog]] [options] <str1>",
           "example_categories" => { Examples => { order => 99 } },
           "examples" => [
             {
               categories   => ["Examples"],
               category     => "Examples",
               cmdline      => "[[prog]] 'a value' --bool1",
               description  => undef,
               example_spec => {
                                 argv    => ["a value", "--bool1"],
                                 summary => "Summary for an example",
                                 test    => 0,
                               },
               summary      => "Summary for an example",
             },
           ],
           "option_categories" => { "Cat1 options" => { order => 50 }, "Main options" => { order => 0 } },
           "opts" => {
             "--bool1" => {
               arg         => "bool1",
               arg_spec    => {
                                cmdline_aliases => { z => { summary => "This is summary for option `-z`" } },
                                schema => ["bool", {}, {}],
                                summary => "Another bool option",
                                tags => ["category:cat1"],
                              },
               categories  => ["Cat1 options"],
               category    => "Cat1 options",
               description => undef,
               fqarg       => "bool1",
               opt_parsed  => { opts => ["bool1"] },
               orig_opt    => "bool1",
               summary     => "Another bool option",
               tags        => 'fix',
             },
             "--flag1, -f" => {
               arg         => "flag1",
               arg_spec    => {
                                cmdline_aliases => { f => {} },
                                schema => ["bool", { is => 1 }, {}],
                                tags => ["category:cat1"],
                              },
               categories  => ["Cat1 options"],
               category    => "Cat1 options",
               description => undef,
               fqarg       => "flag1",
               opt_parsed  => { opts => ["flag1"] },
               orig_opt    => "flag1",
               summary     => undef,
               tags        => 'fix',
             },
             "--str1=s*" => {
               arg => "str1",
               arg_spec => {
                 pos => 0,
                 req => 1,
                 schema => ["str", { req => 1 }, {}],
                 summary => "A required option as well as positional argument",
               },
               categories => ["Main options"],
               category => "Main options",
               description => undef,
               fqarg => "str1",
               opt_parsed => { desttype => "", opts => ["str1"], type => "s" },
               orig_opt => "str1=s",
               pos => 0,
               req => 1,
               summary => "A required option as well as positional argument",
             },
             "-z" => {
               alias_for   => "bool1",
               alias_spec  => 'fix',
               arg         => "bool1",
               arg_spec    => 'fix',
               categories  => ["Cat1 options"],
               category    => "Cat1 options",
               description => undef,
               fqarg       => "bool1",
               is_alias    => 1,
               main_opt    => "--bool1",
               opt_parsed  => { opts => ["z"] },
               orig_opt    => "z",
               summary     => "This is summary for option `-z`",
               tags        => 'fix',
             },
           },
           "usage_line" => "[[prog]] [--bool1|-z|--no-bool1|--nobool1] [--flag1|-f] -- <str1>",
           "usage_line.alt.fmt.pod" => "B<[[prog]]> [B<--bool1>|B<-z>|B<--no-bool1>|B<--nobool1>] [B<--flag1>|B<-f>] -- E<lt>I<str1>E<gt>",
         },
       ];
       $a->[2]{"opts"}{"--bool1"}{tags} = $a->[2]{"opts"}{"--bool1"}{arg_spec}{tags};
       $a->[2]{"opts"}{"--flag1, -f"}{tags} = $a->[2]{"opts"}{"--flag1, -f"}{arg_spec}{tags};
       $a->[2]{"opts"}{"-z"}{alias_spec} = $a->[2]{"opts"}{"--bool1"}{arg_spec}{cmdline_aliases}{z};
       $a->[2]{"opts"}{"-z"}{arg_spec} = $a->[2]{"opts"}{"--bool1"}{arg_spec};
       $a->[2]{"opts"}{"-z"}{tags} = $a->[2]{"opts"}{"--bool1"}{arg_spec}{tags};
       $a;
     }
    For a more complete sample, see function metadata for C<demo_cli_opts> in
    L<Perinci::Examples::CLI>.

RINCI
    Observed function argument attribute: "x.cli.opt_value_label",
    "caption", "".

FUNCTIONS
  gen_cli_doc_data_from_meta
    Usage:

     gen_cli_doc_data_from_meta(%args) -> [$status_code, $reason, $payload, \%result_meta]

    From Rinci function metadata, generate structure convenient for
    producing CLI documentation (help/usage/POD).

    This function calls Perinci::Sub::GetArgs::Argv's
    "gen_getopt_long_spec_from_meta()" (or receive its result as an
    argument, if passed, to avoid calling the function twice) and
    post-processes it: produce command usage line, format the options,
    include information from metadata, group the options by category. It
    also selects examples in the "examples" property which are applicable to
    CLI environment and format them.

    The resulting data structure is convenient to use when one wants to
    produce a documentation for CLI program (including help/usage message
    and POD).

    This function is not exported by default, but exportable.

    Arguments ('*' denotes required arguments):

    *   common_opts => *hash*

        Will be passed to gen_getopt_long_spec_from_meta().

    *   ggls_res => *array*

        Full result from gen_getopt_long_spec_from_meta().

        If you already call Perinci::Sub::GetArgs::Argv's
        "gen_getopt_long_spec_from_meta()", you can pass the *full*
        enveloped result here, to avoid calculating twice. What will be
        useful for the function is the extra result in result metadata
        ("func.*" keys in "$res->[3]" hash).

    *   lang => *str*

    *   meta* => *hash*

    *   meta_is_normalized => *bool*

    *   per_arg_json => *bool*

        Pass per_arg_json=1 to Perinci::Sub::GetArgs::Argv.

    *   per_arg_yaml => *bool*

        Pass per_arg_json=1 to Perinci::Sub::GetArgs::Argv.

    Returns an enveloped result (an array).

    First element ($status_code) is an integer containing HTTP-like status
    code (200 means OK, 4xx caller error, 5xx function error). Second
    element ($reason) is a string containing error message, or something
    like "OK" if status is 200. Third element ($payload) is the actual
    result, but usually not present when enveloped result is an error
    response ($status_code is not 2xx). Fourth element (%result_meta) is
    called result metadata and is optional, a hash that contains extra
    information, much like how HTTP response headers provide additional
    metadata.

    Return value: (hash)

HOMEPAGE
    Please visit the project's homepage at
    <https://metacpan.org/release/Perinci-Sub-To-CLIDocData>.

SOURCE
    Source repository is at
    <https://github.com/perlancar/perl-Perinci-Sub-To-CLIOptSpec>.

BUGS
    Please report any bugs or feature requests on the bugtracker website
    <https://rt.cpan.org/Public/Dist/Display.html?Name=Perinci-Sub-To-CLIDoc
    Data>

    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.

SEE ALSO
    Perinci::CmdLine, Perinci::CmdLine::Lite

    Pod::Weaver::Plugin::Rinci

AUTHOR
    perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE
    This software is copyright (c) 2021, 2019, 2016, 2015, 2014 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.