#!/bin/env perl
# Generate asciidoc documentation from known tags

sub read_file {
	open(ALL, $_[0]);
	my @lines = <ALL>;
	close(ALL);

	my $in_block = 0;

	foreach $line (@lines) {
		if($line =~ /^##\s*$/) {
			$in_block ^= 1;
		}

		# stuff between '##' and '##' blocks but starting with '#'
		if($in_block && $line =~ /^#\s+/) {
			$line =~ s/^#\s+//;

			# remove possible ending spaces
			$line =~ s/\s+$/\n/;

			# check for '\function' or '\fn' tag
			if($line =~ /\\function\s+/ || $line =~ /\\fn\s+/) {
				$line =~ s/\\function\s+//;
				$line =~ s/\\fn\s+//;

				my $undeline = "~" x (length($line) - 1);

				print "\n";
				print $line;
				print $undeline . "\n";
			} else {
				# replace '\code' and '\endcode' if possible
				$line =~ s/\\code/\n-------------------------/;
				$line =~ s/\\endcode/-------------------------\n/;

				# replace '\p' with empty line so it behaves much as newline
				$line =~ s/\\p//;

				print $line;
			}
		}
	}
}

$len = @ARGV;
if($len != 1) {
	print "Usage: extract-jam-doc <directory>\n";
	print "Generate documentation with asciidoc tags by reading jam files from given directory.\n";
	print "Output will be written to stdout.\n";
	exit 1;
}

@files = <$ARGV[0]/*.jam>;
$len = @files;

if($len < 1) {
	print "No jam files found in '$ARGV[0]' directory.\n";
	exit 1;
}

print "EDE Jam Build API\n";
print "=================\n";

foreach $file (@files) {
	&read_file($file);
}