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#!/usr/bin/perl -wn
use strict;
use autodie;
our (@doc, @toc);
our $last;
sub scanline () {
if (m/^-+$/ || m/^=+$/) {
my $lev = $& =~ m/^=/ ? ' ' : ' ';
my $href = $last;
$href =~ y/ A-Z/-a-z/;
$href =~ y/-._a-z//cd;
my $text = $last;
$text = 'Introduction' if $. == 2;
push @toc, "${lev}* [$text](#$href)\n";
}
$last = $_;
chomp $last;
}
if (1..(m/^[A-Z]/ && m/table of contents/i)) {
# before TOC
scanline();
print;
} elsif (m/^\w/..0) {
# after TOC
push @doc, $_;
scanline();
} else {
# in TOC
print if m/^===|^---/;
scanline();
}
END {
print <<END, @toc, "\n";
<!-- TOC autogenerated by $0, do not edit -->
END
print @doc;
}
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