Add environment variable option to cluster.yaml

[jafreck]

environment_variables:
  - name: MY_ENV_VAR
    value: VALUE
  - name: MY_ENV_VAR2
    value: VALUE2

[timotheeguerin]

should that be a plugin though?

[jafreck]

I feel like it would be a very easy interface to specify environment variables. Potentially this could be a top level feature in cluster.yaml though. I would be fine with it either way, plugins just seem like a easy fit to implement, but I don't think it's necessary for the feature.

[timotheeguerin]

Yeah I believe it would nicer as a global setting as this could be used in plugins too and I would expect it to be set before them

[jafreck]

Yeah I like that idea much better

[jafreck]

edited to reflect @timotheeguerin suggestion