You can refer back to an already defined argument.


Declare a placeholder in this way: ${reference}

Where reference is the name of:

  • an existing argument in your Arkenv instance
  • a argument passed from the command line
  • any other key in Arkenv::keyValue, loaded via a feature
  • a system environment variable

Here is an example of using a placeholder in a properties file:

app_name        = MyApp
app_description = ${app_name} is a Arkenv application