Method expandMacros

framework/cfgparser/imports.go:114–154

(node *Node)

}

func (ctx *parseContext) expandMacros(node *Node) error {
	if strings.HasPrefix(node.Name, "$(") && strings.HasSuffix(node.Name, ")") {
		return ctx.Err("can't use macro argument as directive name")
	}

	newArgs := make([]string, 0, len(node.Args))
	for _, arg := range node.Args {
		if !strings.HasPrefix(arg, "$(") || !strings.HasSuffix(arg, ")") {
			if strings.Contains(arg, "$(") && strings.Contains(arg, ")") {
				var err error
				arg, err = ctx.expandSingleValueMacro(arg)
				if err != nil {
					return err
				}
			}

			newArgs = append(newArgs, arg)
			continue
		}

		macroName := arg[2 : len(arg)-1]
		replacement, ok := ctx.macros[macroName]
		if !ok {
			// Undefined macros are expanded to zero arguments.
			continue
		}

		newArgs = append(newArgs, replacement...)
	}
	node.Args = newArgs

	if node.Children != nil {
		for i := range node.Children {
			if err := ctx.expandMacros(&node.Children[i]); err != nil {
				return err
			}
		}
	}

	return nil
}

var macroRe = regexp.MustCompile(`\$\(([^\$]+)\)`)