Create "config/install" folders in execution time

I've run into this as well, heres a patch that always tries to create the folder.

well, perhaps on a dev site the permissions are set so this can happen (certainly wouldn't in my setup but w/e) but I think we need a try-catch or something to handle errors? What happens when this mkdir fails anyways?

I believe mkdir currently returns FALSE when it fails, but it returns FALSE when the folder already exists as well. I'll have a go at improving the overall flow to give some more useful feedback.

Adding a try/catch block on mkdir() doesn't solve the problem as errors are raised on creating the files (and also for any other reason like write permission on the created folder, available space, etc.).

I would suggest to add the patch above as it is and extending the try/catch block on writeBackConfig().

Patch at #2 works on 1.0-beta16 but not on 1.x anymore.

How about this, check for the directory first, then try create it. Un-tested because my drush was playing up but i'll get that sorted later and give it a whirl. Feedback welcome.

Works great, but there could be a small improvement: if the directories could not be created (e.g. due to a permissions problem) then a notice is logged but this is not shown to the end user. The command just exits silently without an error code, making it look like everything went fine, even though nothing was exported. Let's just change it to a drush_set_error() so that an error is shown to the user and an error code is returned.

Thanks everyone!

This is a nice -- current behaviour is a crash:

file_put_contents(modules/commerce_license/config/install/views.view.commerce_licenses.yml):[warning]
failed to open stream: No such file or directory
ConfigDevelAutoExportSubscriber.php:115

which I would call a bug.