Dereferencing a Variable

To dereference or otherwise obtain the value stored in a particular key of an export, enclose the name of the variable between opening and closing braces {} and prepended with a dollar sign $.

For example, the variable named KEY can be dereferenced when specified as ${KEY}, as illustrated in the following example, which sets the attribute destination to VALUE.

exports:
    - KEY: VALUE
fileList:
    - destination: ${KEY}