public String _ide(String[] args) throws IOException {
	if (args.length < 2) {
		error("The ${ide;<>} macro needs an argument");
		return null;
	}
	if (ide == null) {
		ide = new Properties();
		File file = getFile(".settings/org.eclipse.jdt.core.prefs");
		if (!file.isFile()) {
			error("The ${ide;<>} macro requires a .settings/org.eclipse.jdt.core.prefs file in the project");
			return null;
		}
		FileInputStream in = new FileInputStream(file);
		ide.load(in);
	}
	
	String deflt = args.length > 2 ? args[2] : null;
	if ("javac.target".equals(args[1])) {
		return ide.getProperty("org.eclipse.jdt.core.compiler.codegen.targetPlatform", deflt);
	}
	if ("javac.source".equals(args[1])) {
		return ide.getProperty("org.eclipse.jdt.core.compiler.source", deflt);
	}
	return null;
}