Is there a way to apply environment variables in the litestream.yml file?

[junkei-okinawa]

I want to set the replica type in an environment variable, but I get an error.
./etc/litestream.yml

# AWS credentials
access-key-id:     $AWS_ACCESS_KEY_ID
secret-access-key: $AWS_SECRET_ACCESS_KEY

dbs:
- path: $LITESTREAM_ROOT/DB/fruits.db # Database to replicate from
  replicas:
  - type: $REPLICA_TYPE
    bucket: $BUKET_NAME # bucket name
    path: $REPLICA_DB_PATH # File-based replication
    region: $REPLICA_REGION # region of bucket

Execution result of echo $ REPLICA_TYPE

junkeinoMacBook-Pro:litestream junkei$ echo $REPLICA_TYPE
s3

Execution result of litestream replicate

junkeinoMacBook-Pro:litestream junkei$ litestream replicate -config ./litestream/etc/litestream.yml
litestream v0.3.2
unknown replica type in config: "$REPLICA_TYPE"

[benbjohnson]

Hi @junkei-okinawa. The config file doesn't currently allow for expanding environment variables. You don't need to set the access-key-id and secret-access-key though if you have AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY already set.

As for the other settings, what's the use case you want to use them for? Why not just write the values in directly? Or you could use envsubst to expand the values from a template YAML file.