public Optional<String> altProjectSettings() {
        return returnFirstPresentOrEmpty(Options::altProjectSettings);
    }

    @Override
    public Optional<String> altInstallationSettings() {
        return returnFirstPresentOrEmpty(Options::altInstallationSettings);
    }

    @Override
    public Optional<String> altUserToolchains() {
        return returnFirstPresentOrEmpty(Options::altUserToolchains);
    }

    /**
     * Returns the path to an alternate installation settings file.
     *
     * @return an {@link Optional} containing the file path, or empty if not set
     */
    @Nonnull
    Optional<String> altInstallationSettings();

    /**
     * Returns the path to an alternate user toolchains file.
     *
     * @return an {@link Optional} containing the file path, or empty if not set
     */
    @Nonnull

            }
        }

        Path installationSettingsFile = null;
        if (context.options().altInstallationSettings().isPresent()) {
            installationSettingsFile = context.cwd.resolve(
                    context.options().altInstallationSettings().get());

            if (!Files.isRegularFile(installationSettingsFile)) {
                throw new FileNotFoundException(

            return Optional.of(commandLine.getOptionValue(CLIManager.ALTERNATE_PROJECT_SETTINGS));
        }
        return Optional.empty();
    }

    @Override
    public Optional<String> altInstallationSettings() {
        if (commandLine.hasOption(CLIManager.ALTERNATE_INSTALLATION_SETTINGS)) {
            return Optional.of(commandLine.getOptionValue(CLIManager.ALTERNATE_INSTALLATION_SETTINGS));
        }

                .ifPresent(projectSettings -> failIfFileNotExists(
                        context, projectSettings, "The specified project settings file does not exist"));
        options.altInstallationSettings()
                .ifPresent(installationSettings -> failIfFileNotExists(
                        context, installationSettings, "The specified installation settings file does not exist"));