Function SubstituteVars

devcontainer/devcontainer.go:78–93

(s string, workspaceFolder string, lookupEnv func(string) (string, bool))

}

func SubstituteVars(s string, workspaceFolder string, lookupEnv func(string) (string, bool)) string {
	var buf string
	for {
		beforeOpen, afterOpen, ok := strings.Cut(s, "${")
		if !ok {
			return buf + s
		}
		varExpr, afterClose, ok := strings.Cut(afterOpen, "}")
		if !ok {
			return buf + s
		}

		buf += beforeOpen + substitute(varExpr, workspaceFolder, lookupEnv)
		s = afterClose
	}
}

// Spec for variable substitutions:
// https://containers.dev/implementors/json_reference/#variables-in-devcontainerjson