variable_string_default

Define a variable from another variable name, with a default value if undefined.

⚙️ Compatible targets: Linux

Parameters

Name	Documentation
prefix	The prefix of the variable name. This parameter is required.
name	The variable to define, the full name will be prefix.name. This parameter is required.
source_variable	The source variable name. This parameter is required.
default_value	The default value to use if source_variable is not defined. This parameter is required.

Example

method: variable_string_default
params:
  default_value: VALUE
  source_variable: VALUE
  prefix: VALUE
  name: VALUE

Documentation

To use the generated variable, you must use the form ${prefix.name} with each name replaced with the parameters of this method.

Be careful that using a global variable can lead to unpredictable content in case of multiple definition, which is implicitly the case when a technique has more than one instance (directive). Please note that only global variables are available within templates.