public boolean validateExuberantCtags() {
if (exuberantCtagsAvailable != null) {
return exuberantCtagsAvailable;
}
Executor executor = new Executor(new String[]{getCtags(), "--version"});
executor.exec(false);
String output = executor.getOutputString();
exuberantCtagsAvailable = !(output == null || !output.contains("Exuberant Ctags"));
return exuberantCtagsAvailable;