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 3.00;
use IPC::Open2;

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

sub getsetup () {
    return
        plugin => {
            safe => 1,
            rebuild => undef,
        },
}

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

    my $pid;
    my $sigpipe=0;
    $SIG{PIPE}=sub { $sigpipe=1 };
    $pid=open2(*IN, *OUT, 'tidy -quiet -asxhtml -utf8 --show-body-only yes --show-warnings no --tidy-mark no --markup yes 2>/dev/null');

    # 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;

    $SIG{PIPE}="DEFAULT";
    if ($sigpipe || ! defined $ret) {
        print STDERR gettext("warning: tidy failed")."\n";
        return "";
    }

    return $ret;
}

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