Is there a way to set a StringSource to have a default value from a particular env variable?

No, StringSource expects that the value is set in the env var (if that’s the way it’s configured).

how do I set that up? I only see a set to

env

option when I pass it into the execute/run stage, not on the resource itself as part of the field

For a resource, I think you could use the

configured

API to hardcode the configuration at definition time:

my_resource.configured({"my_value": { "env": "MY_ENV_VAR" }})

does that need to be passed around anywhere, or that just updates my_resource in place?

you’d pass that into the job in place of your naked resource:

@job(resource_defs={"my_resource_key": my_resource.configured({"my_value": { "env": "MY_ENV_VAR" }})})
def my_job():
    ...

the the resource needs to be configured the same way for a whole repo, is there an easy way to do that once, or I do that per job/asset list`with_resources`

We don’t currently attach resources at the repository level. Your best bet might just be to define your variable as the configured resource and use that everywhere:

my_resource = my_unconfigured_resource.configured(...)