Module variables 

Port of internal/variables: resolves caproni configuration variables. Supports user-defined static literal variables and predefined (built-in) variables, falling back to the process environment.

Modules

expand

Port of internal/variables/expand.go: shell-like ${VAR}/$VAR expansion of config values and variable definitions.

predefined

Port of internal/variables/predefined_variable.go.

resolver

Port of internal/variables/resolver.go.