checkPreconditions(registry);
        List<T> matches = new ArrayList<T>();
        select(registry, matches);
        if (matches.isEmpty()) {
            String message = formatNoMatchesMessage(settingsDescription) + UNRELATED_BUILD_HINT;
            throw new InvalidUserDataException(message);
        }
        if (matches.size() != 1) {

    private final File buildFile;

    public BuildFileProjectSpec(File buildFile) {
        this.buildFile = buildFile;
    }

    @Override
    protected String formatNoMatchesMessage(String settings) {
        return String.format("Build file '%s' is not part of the build defined by %s.", buildFile, settings);
    }

    @Override

            }
        }
        if (useRootWhenNoMatch && matches.isEmpty()) {
            matches.add(candidates.getRootProject());
        }
    }

    @Override
    protected String formatNoMatchesMessage(String settings) {
        return String.format("Project directory '%s' is not part of the build defined by %s.",  currentDir, settings);
    }

    @Override

    private final File dir;

    public ProjectDirectoryProjectSpec(File dir) {
        this.dir = dir;
    }

    @Override
    protected String formatNoMatchesMessage(String settings) {
        return String.format("Project directory '%s' is not part of the build defined by %s.", dir, settings);
    }

    @Override