示例#1
0
func (n NodeCommand) Eval(scp *variables.Scope, ioc *T.IOContainer) T.ExitStatus {
	// A line with only assignments applies them to the Root Scope
	// We check this first to avoid unnecessary scope Push/Pop's
	if len(n.Args) == 0 {
		for k, v := range n.Assign {
			scp.Set(k, v.Expand(scp))
		}
		return T.ExitSuccess
	}

	// Minimum of len(n.Args) after expansions, Likely
	// that it will be more after globbing though
	expandedArgs := []string{}
	for _, arg := range n.Args {
		expandedArgs = append(expandedArgs, arg.Expand(scp))
	}

	// Order of precedence:
	// Relative command > Builtin > User Function > Other external command
	command := expandedArgs[0]
	builtinFunc, builtinFound := builtins.All[command]
	userFunc, userFuncFound := scp.Functions[command]

	if strings.ContainsRune(command, '/') || (!builtinFound && !userFuncFound) {
		scp.Push()
		defer scp.Pop()

		for k, v := range n.Assign {
			scp.Set(k, v.Expand(scp), variables.LocalScope)
		}
		return n.execExternal(scp, ioc, expandedArgs)
	}

	if builtinFound {
		return builtinFunc(scp, ioc, expandedArgs[1:])
	}

	if userFuncFound {
		x := userFunc.(NodeFunction)
		return x.EvalFunc(scp, ioc, expandedArgs[1:])
	}

	return T.ExitUnknownCommand
}
示例#2
0
func (n NodeFunction) EvalFunc(scp *variables.Scope, ioc *T.IOContainer, args []string) T.ExitStatus {
	scp.PushFunction(args)
	defer scp.Pop()
	return n.Body.Eval(scp, ioc)
}