Substitution

[benzvan]

Many descriptions of variable substitution are vague. It looks like the substitution follows bash 4.0 rules but is unclear. A link to bash explanations of substitutions, if valid or describing the substitutions would be greatly appreciated.

[JordanSussman]

The underlying library that implements the variable substitution has somewhat decent explanation of the available functions here. Are you looking for some specific example(s) beyond what is offered in that link?

[benzvan]

This is where I was looking https://go-vela.github.io/docs/reference/environment/substitution/