Alter command behavior using templates¶

You can use templates to alter the definition using environment variables. For example, the following project definition templates the schema for a Streamlit dashboard:

definition_version: "1.1"
env:
  schema: "test"
streamlit:
  name: "MY_APP"
  schema: <% ctx.env.schema %>

This feature lets you to alter the behavior of the snow streamlit deploy command by setting a schema environment variable. Using this approach, you can deploy the same dashboard to multiple different schemas by entering the following commands to deploy different schemas:

schema="staging"; snow streamlit deploy
schema="prod"; snow streamlit deploy

You can also use the template feature without defining variables in the env section. If a variable is not present in env section, Snowflake CLI looks for corresponding environment variables. For example, if you define a Streamlit application similar to the following, you can still alter the behavior of snow streamlit deploy by specifying a schema environment variable.

definition_version: "1.1"
streamlit:
  name: "MY_APP"
  schema: <% ctx.env.schema %>