#!perl

our $DATE = '2019-07-27'; # DATE
our $VERSION = '0.004'; # VERSION

use 5.010001;
use strict;
use warnings;

use Perinci::CmdLine::Any;

Perinci::CmdLine::Any->new(
    url => '/App/htmlsel/htmlsel',
)->run;

# ABSTRACT: Select HTML::Element nodes using CSel syntax
# PODNAME: htmlsel

__END__

=pod

=encoding UTF-8

=head1 NAME

htmlsel - Select HTML::Element nodes using CSel syntax

=head1 VERSION

This document describes version 0.004 of htmlsel (from Perl distribution App-htmlsel), released on 2019-07-27.

=head1 SYNOPSIS

 % htmlsel '.Element[tag="p"] .Element[tag="b"]' file.html

=head1 DESCRIPTION

This utility uses CSel to select against a tree of L<HTML::Element> nodes
constructed by L<HTML::TreeBuilder>. You probably want to use L<html-css-sel>
instead.

About the tree: the root node is HTML::TreeBuilder object. HTML::TreeBuilder is
a subclass of HTML::Element. All the other nodes are HTML::Element objects. This
utility allows you to omit the C<HTML::> prefix, so to select any node you can
use:

 .Element

which means to select any HTML::Element object (as well as instances of
HTML::Element subclasses).

=head1 OPTIONS

C<*> marks required options.

=head2 Main options

=over

=item B<--action>=I<s@>

Specify action(s) to perform on matching nodes.

Default value:

 ["print_as_string"]

Can be specified multiple times.

=item B<--actions-json>=I<s>

Specify action(s) to perform on matching nodes (JSON-encoded).

See C<--action>.

=item B<--count>

Shortcut for --action count.

See C<--action>.

=item B<--dump>

Shortcut for --action dump.

See C<--action>.

=item B<--expr>=I<s>*

=item B<--file>=I<filename>

Default value:

 "-"

=item B<--print>

Shortcut for --action print_as_string.

See C<--action>.

=item B<--print-method>=I<s@>

--print-method M is shortcut for --action print_method:M.

See C<--action>.

Can be specified multiple times.

=back

=head2 Configuration options

=over

=item B<--config-path>=I<s>, B<-c>

Set path to configuration file.

=item B<--config-profile>=I<s>, B<-P>

Set configuration profile to use.

=item B<--no-config>, B<-C>

Do not use any configuration file.

=back

=head2 Environment options

=over

=item B<--no-env>

Do not read environment for default options.

=back

=head2 Output options

=over

=item B<--format>=I<s>

Choose output format, e.g. json, text.

Default value:

 undef

=item B<--json>

Set output format to json.

=item B<--naked-res>

When outputing as JSON, strip result envelope.

Default value:

 0

By default, when outputing as JSON, the full enveloped result is returned, e.g.:

    [200,"OK",[1,2,3],{"func.extra"=>4}]

The reason is so you can get the status (1st element), status message (2nd
element) as well as result metadata/extra result (4th element) instead of just
the result (3rd element). However, sometimes you want just the result, e.g. when
you want to pipe the result for more post-processing. In this case you can use
`--naked-res` so you just get:

    [1,2,3]


=back

=head2 Other options

=over

=item B<--help>, B<-h>, B<-?>

Display help message and exit.

=item B<--version>, B<-v>

Display program's version and exit.

=back

=head1 COMPLETION

This script has shell tab completion capability with support for several
shells.

=head2 bash

To activate bash completion for this script, put:

 complete -C htmlsel htmlsel

in your bash startup (e.g. F<~/.bashrc>). Your next shell session will then
recognize tab completion for the command. Or, you can also directly execute the
line above in your shell to activate immediately.

It is recommended, however, that you install modules using L<cpanm-shcompgen>
which can activate shell completion for scripts immediately.

=head2 tcsh

To activate tcsh completion for this script, put:

 complete htmlsel 'p/*/`htmlsel`/'

in your tcsh startup (e.g. F<~/.tcshrc>). Your next shell session will then
recognize tab completion for the command. Or, you can also directly execute the
line above in your shell to activate immediately.

It is also recommended to install L<shcompgen> (see above).

=head2 other shells

For fish and zsh, install L<shcompgen> as described above.

=head1 CONFIGURATION FILE

This script can read configuration files. Configuration files are in the format of L<IOD>, which is basically INI with some extra features.

By default, these names are searched for configuration filenames (can be changed using C<--config-path>): F<~/.config/htmlsel.conf>, F<~/htmlsel.conf>, or F</etc/htmlsel.conf>.

All found files will be read and merged.

To disable searching for configuration files, pass C<--no-config>.

You can put multiple profiles in a single file by using section names like C<[profile=SOMENAME]> or C<[SOMESECTION profile=SOMENAME]>. Those sections will only be read if you specify the matching C<--config-profile SOMENAME>.

You can also put configuration for multiple programs inside a single file, and use filter C<program=NAME> in section names, e.g. C<[program=NAME ...]> or C<[SOMESECTION program=NAME]>. The section will then only be used when the reading program matches.

Finally, you can filter a section by environment variable using the filter C<env=CONDITION> in section names. For example if you only want a section to be read if a certain environment variable is true: C<[env=SOMEVAR ...]> or C<[SOMESECTION env=SOMEVAR ...]>. If you only want a section to be read when the value of an environment variable has value equals something: C<[env=HOSTNAME=blink ...]> or C<[SOMESECTION env=HOSTNAME=blink ...]>. If you only want a section to be read when the value of an environment variable does not equal something: C<[env=HOSTNAME!=blink ...]> or C<[SOMESECTION env=HOSTNAME!=blink ...]>. If you only want a section to be read when an environment variable contains something: C<[env=HOSTNAME*=server ...]> or C<[SOMESECTION env=HOSTNAME*=server ...]>. Note that currently due to simplistic parsing, there must not be any whitespace in the value being compared because it marks the beginning of a new section filter or section name.

List of available configuration parameters:

 actions (see --action)
 expr (see --expr)
 file (see --file)
 format (see --format)
 naked_res (see --naked-res)

=head1 ENVIRONMENT

=head2 HTMLSEL_OPT => str

Specify additional command-line options.

=head1 FILES

F<~/.config/htmlsel.conf>

F<~/htmlsel.conf>

F</etc/htmlsel.conf>

=head1 HOMEPAGE

Please visit the project's homepage at L<https://metacpan.org/release/App-htmlsel>.

=head1 SOURCE

Source repository is at L<https://github.com/perlancar/perl-App-htmlsel>.

=head1 BUGS

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

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.

=head1 SEE ALSO

L<Data::CSel>

L<html-css-sel> (from L<App::html::css::sel>), similar utility to select HTML
tree nodes but using CSS Selector syntax instead of L<CSel|Data::CSel> syntax.
It's what people normally use.

Other utilities that use CSel against various data: L<ddsel>, L<jsonsel>,
L<orgsel>, L<podsel>, L<ppisel>, L<yamlsel>.

=head1 AUTHOR

perlancar <perlancar@cpan.org>

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2019 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.

=cut
