Magento2: Cannot create widget from install script

[samtay]

This is related to #1405, lack of area code being set during bin/magento setup:upgrade. There are events after the widget save that deal with generating layout xml -- which relies Magento\Theme\Model\View\Design, which then tries to access the current app state area code.

Magento\Framework\Exception\LocalizedException: Area code is not set in /home/samtay/git/sites/RDS/webroot/vendor/magento/framework/App/State.php on line 139

Call Stack:
    0.1087     229952   1. {main}() /home/samtay/git/sites/RDS/webroot/bin/magento:0
    0.9102   37266416   2. Symfony\Component\Console\Application->run(???, ???) /home/samtay/git/sites/RDS/webroot/bin/magento:25
    0.9108   37310032   3. Magento\Framework\Console\Cli->doRun(???, ???) /home/samtay/git/sites/RDS/webroot/vendor/symfony/console/Symfony/Component/Console/Application.php:126
    0.9108   37310288   4. Symfony\Component\Console\Application->doRun(???, ???) /home/samtay/git/sites/RDS/webroot/vendor/magento/framework/Console/Cli.php:49
    0.9109   37311176   5. Symfony\Component\Console\Application->doRunCommand(???, ???, ???) /home/samtay/git/sites/RDS/webroot/vendor/symfony/console/Symfony/Component/Console/Application.php:195
    0.9109   37311648   6. Symfony\Component\Console\Command\Command->run(???, ???) /home/samtay/git/sites/RDS/webroot/vendor/symfony/console/Symfony/Component/Console/Application.php:874
    0.9111   37315280   7. Magento\Setup\Console\Command\UpgradeCommand->execute(???, ???) /home/samtay/git/sites/RDS/webroot/vendor/symfony/console/Symfony/Component/Console/Command/Command.php:257
    4.2849   87010208   8. Magento\Setup\Model\Installer->installDataFixtures() /home/samtay/git/sites/RDS/webroot/setup/src/Magento/Setup/Console/Command/UpgradeCommand.php:72
    4.8371   87140608   9. Magento\Setup\Model\Installer->handleDBSchemaData(???, ???) /home/samtay/git/sites/RDS/webroot/setup/src/Magento/Setup/Model/Installer.php:746
    4.8604   87314456  10. BlueAcorn\CustomWidgets\Setup\InstallData->install(???, ???) /home/samtay/git/sites/RDS/webroot/setup/src/Magento/Setup/Model/Installer.php:798
    4.9340   89520432  11. Magento\Framework\Model\AbstractModel->save() /home/samtay/git/sites/RDS/webroot/app/code/BlueAcorn/CustomWidgets/Setup/InstallData.php:113
    4.9340   89520912  12. Magento\Framework\Model\ResourceModel\Db\AbstractDb->save(???) /home/samtay/git/sites/RDS/webroot/vendor/magento/framework/Model/AbstractModel.php:615
    9.7842   89859688  13. Magento\Framework\Model\ResourceModel\Db\AbstractDb->processAfterSaves(???) /home/samtay/git/sites/RDS/webroot/vendor/magento/framework/Model/ResourceModel/Db/AbstractDb.php:408
    9.7842   89860144  14. Magento\Widget\Model\ResourceModel\Widget\Instance->_afterSave(???) /home/samtay/git/sites/RDS/webroot/vendor/magento/framework/Model/ResourceModel/Db/AbstractDb.php:828
   12.7908   89870472  15. Magento\Widget\Model\ResourceModel\Widget\Instance->_saveLayoutUpdates(???, ???) /home/samtay/git/sites/RDS/webroot/vendor/magento/module-widget/Model/ResourceModel/Widget/Instance.php:78
   22.3154   89871744  16. Magento\Widget\Model\Widget\Instance->generateLayoutUpdateXml(???, ???) /home/samtay/git/sites/RDS/webroot/vendor/magento/module-widget/Model/ResourceModel/Widget/Instance.php:124
   22.3155   89872656  17. Magento\Framework\View\FileSystem->getTemplateFileName(???, ???) /home/samtay/git/sites/RDS/webroot/vendor/magento/module-widget/Model/Widget/Instance.php:552
   22.3155   89873664  18. Magento\Framework\View\Asset\Repository->updateDesignParams(???) /home/samtay/git/sites/RDS/webroot/vendor/magento/framework/View/FileSystem.php:121
   22.3193   89917760  19. Magento\Framework\View\Asset\Repository->getDefaultParameter(???) /home/samtay/git/sites/RDS/webroot/vendor/magento/framework/View/Asset/Repository.php:154
   22.3193   89917808  20. Magento\Theme\Model\View\Design\Proxy->getDesignParams() /home/samtay/git/sites/RDS/webroot/vendor/magento/framework/View/Asset/Repository.php:167
   22.3195   89927704  21. Magento\Theme\Model\View\Design->getDesignParams() /home/samtay/git/sites/RDS/webroot/var/generation/Magento/Theme/Model/View/Design/Proxy.php:159
   22.3195   89927816  22. Magento\Theme\Model\View\Design->getArea() /home/samtay/git/sites/RDS/webroot/vendor/magento/module-theme/Model/View/Design.php:264
   22.3195   89927880  23. Magento\Framework\App\State->getAreaCode() /home/samtay/git/sites/RDS/webroot/vendor/magento/module-theme/Model/View/Design.php:126

[kandy]

If you need run some code in specific aria you nee use code like

        $this->appState->emulateAreaCode(
            FrontNameResolver::AREA_CODE,
            function() {
               // put you code specific code here
            }
        );

where state is instance of Magento\Framework\App\State class

[samtay]

I would still consider this a bug. Shouldn't have to emulate an area code every time we want to create entities in an InstallData class.