NAME Getopt::Long::Util - Utilities for Getopt::Long VERSION This document describes version 0.895 of Getopt::Long::Util (from Perl distribution Getopt-Long-Util), released on 2021-07-10. CONTRIBUTOR Steven Haryanto FUNCTIONS detect_getopt_long_script Usage: detect_getopt_long_script(%args) -> [$status_code, $reason, $payload, \%result_meta] Detect whether a file is a Getopt::Long-based CLI script. The criteria are: * the file must exist and readable; * (optional, if "include_noexec" is false) file must have its executable mode bit set; * content must start with a shebang "#!"; * either: must be perl script (shebang line contains 'perl') and must contain something like "use Getopt::Long"; This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * filename => *str* Path to file to be checked. * include_noexec => *bool* (default: 1) Include scripts that do not have +x mode bit set. * string => *buf* String to be checked. Returns an enveloped result (an array). First element ($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: (any) gen_getopt_long_spec_from_getopt_std_spec Usage: gen_getopt_long_spec_from_getopt_std_spec(%args) -> hash Generate Getopt::Long spec from Getopt::Std spec. This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * is_getopt => *bool* Whether to assume spec is for getopt() or getopts(). By default spec is assumed to be for getopts() instead of getopt(). This means that for a spec like "abc:", "a" and "b" don't take argument while "c" does. But if "is_getopt" is true, the meaning of ":" is reversed: "a" and "b" take arguments while "c" doesn't. * spec* => *str* Getopt::Std spec string. Return value: (hash) humanize_getopt_long_opt_spec Usage: humanize_getopt_long_opt_spec( [ \%optional_named_args ] , $optspec) -> str|hash Convert Getopt::Long option specification into a more human-friendly notation that is suitable for including in help/usage text, for example: help|h|? -> "--help, -h, -?" help|h|? -> "--help | -h | -?" # if you provide 'separator') --foo=s -> "--foo=s" --foo=s -> "--foo=somelabel" # if you provide 'value_label' --foo:s -> "--foo[=s]" --foo=s@ -> "(--foo=s)+" --foo=s% -> "(--foo key=value)+" --foo=s% -> "(--foo somelabel1=somelabel2)+" # if you provide 'key_label' and 'value_label' --debug! -> "--(no)debug" It also produces POD-formatted string for use in POD documentation: --foo=s -> {plaintext=>"--foo=s", pod=>"B<--foo>=I"} # if you set 'extended' to true Will die if can't parse the optspec string. This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * extended => *bool* If set to true, will return a hash of multiple formats instead of a single plaintext format. * key_label => *str* (default: "key") * $optspec* => *str* * separator => *str* (default: ", ") * value_label => *str* Return value: (str|hash) parse_getopt_long_opt_spec Usage: parse_getopt_long_opt_spec($optspec) -> hash Parse a single Getopt::Long option specification. Examples: * Example #1: parse_getopt_long_opt_spec("help|h|?"); # -> { dash_prefix => "", opts => ["help", "h", "?"] } * Example #2: parse_getopt_long_opt_spec("--foo=s"); # -> { dash_prefix => "--", desttype => "", opts => ["foo"], type => "s" } Will produce a hash with some keys: * "is_arg" (if true, then option specification is the special "<>" for argument callback) * "opts" (array of option names, in the order specified in the opt spec) * "type" (string, type name) * "desttype" (either '', or '@' or '%'), * "is_neg" (true for "--opt!") * "is_inc" (true for "--opt+") * "min_vals" (int, usually 0 or 1) * "max_vals" (int, usually 0 or 1 except for option that requires multiple values) Will return undef if it can't parse the string. This function is not exported by default, but exportable. Arguments ('*' denotes required arguments): * $optspec* => *str* Return value: (hash) HOMEPAGE Please visit the project's homepage at . SOURCE Source repository is at . BUGS Please report any bugs or feature requests on the bugtracker website 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 Getopt::Long Getopt::Long::Spec, which can also parse Getopt::Long spec into hash as well as transform back the hash to Getopt::Long spec. OO interface. I should've found this module first before writing my own "parse_getopt_long_opt_spec()". But at least currently "parse_getopt_long_opt_spec()" is at least about 30-100+% faster than Getopt::Long::Spec::Parser, has a much simpler implementation (a single regex match), and can handle valid Getopt::Long specs that Getopt::Long::Spec::Parser fails to parse, e.g. "foo|f=s@". AUTHOR perlancar COPYRIGHT AND LICENSE This software is copyright (c) 2021, 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.