Haxe Path Relative-to.hx

static function relativePath(relativeTo: String, path: String) {
	// make both absolute
	path = Path.removeTrailingSlashes(FileSystem.absolutePath(path));
	relativeTo = Path.removeTrailingSlashes(FileSystem.absolutePath(relativeTo));

	var aPath = path.split('/');
	var aRelativeTo = relativeTo.split('/');

	// find shared part of path
	var matchesUpToIndex = 0;
	for (i in 0...aRelativeTo.length) {
		if (aPath[i] == aRelativeTo[i]) {
			matchesUpToIndex = i;
		} else {
			break;
		}
	}

	return [for (_ in 0...(aRelativeTo.length - 1) - matchesUpToIndex) '..']
		.concat(aPath.slice(matchesUpToIndex + 1))
		.join('/');
}