For parameters in the environment namespace it is possible to inject variables into the TOML using the environment variable resolver.

This expects an entry of the form ${env.VARIABLE_NAME}.

Note: Flyway parameters outside of the environment namespace have their own configuration - see the 'Environment Variable' section of the parameter of interest

Usage

Flyway Desktop

This can't be set in a config file via Flyway Desktop, although it will be honoured.

TOML Configuration File

[environments.mydevdb]
user = "${env.DATABASE_USERNAME}"