this.projectSettingsSource = projectSettingsSource;

        return this;
    }

    @Override
    public File getUserSettingsFile() {
        return userSettingsFile;
    }

    @Override
    public DefaultSettingsBuildingRequest setUserSettingsFile(File userSettingsFile) {
        this.userSettingsFile = userSettingsFile;

        SettingsBuildingRequest settingsRequest = new DefaultSettingsBuildingRequest();
        settingsRequest.setUserSettingsFile(request.getUserSettingsFile());
        settingsRequest.setProjectSettingsFile(request.getProjectSettingsFile());
        settingsRequest.setGlobalSettingsFile(request.getGlobalSettingsFile());

        Settings globalSettings = readSettings(globalSettingsSource, request, problems);

        Source userSettingsSource = getSettingsSource(request.getUserSettingsFile(), request.getUserSettingsSource());
        Settings userSettings = readSettings(userSettingsSource, request, problems);

        settingsMerger.merge(userSettings, globalSettings, TrackableBase.GLOBAL_LEVEL);

    /**
     * Gets the user settings file.
     *
     * @return The user settings file or {@code null} if none.
     */
    File getUserSettingsFile();

    /**
     * Sets the user settings file. A non-existent settings file is equivalent to empty settings. If both a user
     * settings file and a global settings file are given, the user settings take precedence.