Configuration file validation should evaluate environment variables

[babadofar]

kafka-shell works fine using environment variables for bootstrap server and zookeeper, but barfs at schema_registry_url due to a validation error
To Reproduce
Use a config.yaml file like this

version: 1
enable:
  history: true
  save_on_exit: true
  auto_complete: true
  auto_suggest: true
  inline_help: true
  fuzzy_search: true
cluster: local
clusters:
  local:
    bootstrap_servers: $BOOTSTRAP_SERVER
    zookeeper_connect: $ZOO_KEEPER
    schema_registry_url: $SCHEMA_REGISTRY

Expected behavior
It should evalute the environment variables
Screenshots

[root@d89fde020d7f /]# kafka-shell
Invalid user configuration (clusters, local, schema_registry_url): '$SCHEMA_REGISTRY' does 
not match '^https?://(.*)$'

[devshawn]

Hey, thanks for the detailed bug report. This wasn't a use case I considered heavily -- but definitely a great idea. I'll take a look at this tonight and get a fix out.

[devshawn]

Hi there, schema_registry_url and ksql_server_url will now accept environment variables. I've released 0.1.2 to address this.

Please let me know if there are any other configuration settings that you'd like to work with environment variables. Thanks!! :)

[babadofar]

🏆 awesome work! Thanks