--parameter-overrides using host Environment variables

[royassis]

Hey

Right now i'm using samconfig.toml to pass Parameters into my template.yaml.
The file is under version control and is uploaded to a remote repo.

There is a secret which is not in samconfig.toml and I explicitly pass it via the command line, i.e.

saws build --parameter-overrides mysecret=1234

It would would have been nice if it could be passed implicitly direct from my host environment parameters.

Best,
Roy

[davidjb]

At the moment, I'm managing this with a Makefile so the env variables gets passed though automatically for the various --parameter-overrides I need to set. There's quite a few of them so writing them out by hand each time is impossible.

Ideally, SAM would support some manner of defining/loading Parameters from the host environment, allowing sensitive data to be used by SAM but not stored directly in samconfig.[toml|yml] or the template.