[RFC] Add support for docker-style _FILE environment variables

[apollo13]

I'd like to add support for docker-style _FILE environment variables. What this would mean basically is the following:

Take this line as an example:

DATABASES = {'default': env.db(default=sqlite_default)}

This will make environ look for a DATABASE_URL and use that. I'd like to extend it to first look for DATABASE_URL_FILE and if that variable exists and is set read the file it points to and use that instead of DATABASE_URL.

The idea here is that stuff like docker swarm secrets are injected as files into your container and I'd need an easy way to reference those. You can find more information about it at https://hub.docker.com/r/_/postgres/ (scroll down to Docker Secrets). Note that while I am referring solely to docker here, the same holds true for any other system which injects secrets as files and not environment variables.

Backwards compatibility wise there should be no issue;

env('ASD_FILE')

would try ASD_FILE_FILE and not read ASD_FILE as file directly...

If you think this is a good idea I'll happily supply a PR; if you are need more convincing please also tell me :)

[valberg]

@apollo13 have you done any work on this?

[apollo13]

Nope

…

On Thu, Jan 24, 2019, at 23:50, Víðir Valberg Guðmundsson wrote: @apollo13 <https://github.com/apollo13> have you done any work on this? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#189 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAE-i9yjC8sljIEShn500PdomQsDpU4Pks5vGjjCgaJpZM4VGa3H>.

[sergeyklay]

This is resolved in main branch. Thank you for the report, and for helping us make django-environ better. And I am sorry about the delay.