template.pl


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#!/usr/bin/env perl

# this script is generally responsible for all html postprocessing that md2html can't do

use v5.39;
use utf8;
use autodie;

use Mojo::DOM;

my $template = do {
    local $/ = undef;
    open my $fh, '<', 'template.html';
    <$fh>;
};

my $dom = Mojo::DOM->new($template);

my $content = `md2html $ARGV[0]`;
# inject content @ <article>
$dom->at('article')->append_content($content);

# replace <title> with the contents of the first <h1>
my $title_dom = $dom->at('h1');
$dom->at('title')->content($title_dom->text) if ($title_dom);

for my $img ($dom->find('img')->each) {
    my $alt = $img->attr('alt');
    $img->attr(title => $alt);
}

say "$dom";