IkiWiki/Plugin/htmltidy.pm



#!/usr/bin/perl
# HTML Tidy plugin
# requires 'tidy' binary, found in Debian or http://tidy.sf.net/
# mostly a proof-of-concept on how to use external filters.
# It is particularly useful when the html plugin is used.
#
# by Faidon Liambotis
package IkiWiki::Plugin::htmltidy;

use warnings;
use strict;
use IkiWiki;
use IPC::Open2;

sub import { #{{{
    IkiWiki::hook(type => "sanitize", id => "tidy", call => \&sanitize);
} # }}}

sub sanitize (@) { #{{{
    my %params=@_;

    my $tries=10;
    my $pid;
    while (1) {
        eval {
            $pid=open2(*IN, *OUT, 'tidy -quiet -asxhtml -utf8 --show-body-only yes --show-warnings no --tidy-mark no');
        };
        last unless $@;
        $tries--;
        if ($tries < 1) {
            IkiWiki::debug("failed to run tidy: $@");
            return $params{content};
        }
    }
    # open2 doesn't respect "use open ':utf8'"
    binmode (IN, ':utf8'); 
    binmode (OUT, ':utf8'); 
    
    print OUT $params{content};
    close OUT;

    local $/ = undef;
    my $ret=<IN>;
    close IN;
    waitpid $pid, 0;

    return $ret;
} # }}}

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