<commit_before>module Gitlab
  module CurrentSettings
    def current_application_settings
      key = :current_application_settings

      RequestStore.store[key] ||= begin
        settings = nil

        if connect_to_db?
          settings = ApplicationSetting.current
          settings ||= ApplicationSetting.create_from_defaults unless ActiveRecord::Migrator.needs_migration?
        end

        settings || fake_application_settings
      end
    end

    def fake_application_settings
      OpenStruct.new(
        default_projects_limit: Settings.gitlab['default_projects_limit'],
        default_branch_protection: Settings.gitlab['default_branch_protection'],
        signup_enabled: Settings.gitlab['signup_enabled'],
        signin_enabled: Settings.gitlab['signin_enabled'],
        twitter_sharing_enabled: Settings.gitlab['twitter_sharing_enabled'],
        gravatar_enabled: Settings.gravatar['enabled'],
        sign_in_text: Settings.extra['sign_in_text'],
        restricted_visibility_levels: Settings.gitlab['restricted_visibility_levels'],
        max_attachment_size: Settings.gitlab['max_attachment_size'],
        session_expire_delay: Settings.gitlab['session_expire_delay'],
        default_project_visibility: Settings.gitlab.default_projects_features['visibility_level'],
        default_snippet_visibility: Settings.gitlab.default_projects_features['visibility_level'],
        restricted_signup_domains: Settings.gitlab['restricted_signup_domains'],
        import_sources: ['github','bitbucket','gitlab','gitorious','google_code','fogbugz','git'],
        shared_runners_enabled: Settings.gitlab_ci['shared_runners_enabled'],
        max_artifacts_size: Settings.artifacts['max_size'],
        require_two_factor_authentication: false,
        two_factor_grace_period: 48
      )
    end

    private

    def connect_to_db?
      ENV['USE_DB'] != 'false' &&
      ActiveRecord::Base.connection_pool.active_connection? &&
      ActiveRecord::Base.connection.table_exists?('application_settings')

    rescue ActiveRecord::NoDatabaseError
      false
    end
  end
end<commit_msg>Use ActiveRecord::Base.connection.active? and rescue any exception in connect_to_db?<commit_after>module Gitlab
  module CurrentSettings
    def current_application_settings
      key = :current_application_settings

      RequestStore.store[key] ||= begin
        settings = nil

        if connect_to_db?
          settings = ApplicationSetting.current
          settings ||= ApplicationSetting.create_from_defaults unless ActiveRecord::Migrator.needs_migration?
        end

        settings || fake_application_settings
      end
    end

    def fake_application_settings
      OpenStruct.new(
        default_projects_limit: Settings.gitlab['default_projects_limit'],
        default_branch_protection: Settings.gitlab['default_branch_protection'],
        signup_enabled: Settings.gitlab['signup_enabled'],
        signin_enabled: Settings.gitlab['signin_enabled'],
        twitter_sharing_enabled: Settings.gitlab['twitter_sharing_enabled'],
        gravatar_enabled: Settings.gravatar['enabled'],
        sign_in_text: Settings.extra['sign_in_text'],
        restricted_visibility_levels: Settings.gitlab['restricted_visibility_levels'],
        max_attachment_size: Settings.gitlab['max_attachment_size'],
        session_expire_delay: Settings.gitlab['session_expire_delay'],
        default_project_visibility: Settings.gitlab.default_projects_features['visibility_level'],
        default_snippet_visibility: Settings.gitlab.default_projects_features['visibility_level'],
        restricted_signup_domains: Settings.gitlab['restricted_signup_domains'],
        import_sources: ['github','bitbucket','gitlab','gitorious','google_code','fogbugz','git'],
        shared_runners_enabled: Settings.gitlab_ci['shared_runners_enabled'],
        max_artifacts_size: Settings.artifacts['max_size'],
        require_two_factor_authentication: false,
        two_factor_grace_period: 48
      )
    end

    private

    def connect_to_db?
      # When the DBMS is not available, an exception (e.g. PG::ConnectionBad) is raised
      active_db_connection = ActiveRecord::Base.connection.active? rescue false

      ENV['USE_DB'] != 'false' &&
      active_db_connection &&
      ActiveRecord::Base.connection.table_exists?('application_settings')

    rescue ActiveRecord::NoDatabaseError
      false
    end
  end
end
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