为了记录目的,我想写一个打印包名的函数。 我可以为目录名称执行此操作:
// file is the full file name
// 4 - how many calls we want to go up in a stack trace.
_, file, line, ok := runtime.Caller(4)
...但找不到包名的方法(包名可以与目录名不同)。
答案 0 :(得分:1)
我遇到了类似的问题 - 从包路径中如何获得包名称。我发现的最佳解决方案是执行" go list"命令。不理想,但我在其他地方空白。
在我的情况下,我也有一个问题,有时包是一个空目录。没有源文件,"去列表"抛出一个错误,所以我添加了一个函数来从路径创建一个合理的包名称。
以下是代码:
func getPackageName(path string) string {
output, err := exec.Command("go", "list", "-f", "{{.Name}}", path).CombinedOutput()
if err != nil {
return guessPackageName(path)
}
return strings.TrimSpace(string(output))
}
func guessPackageName(path string) string {
preferred := path
if strings.HasSuffix(preferred, "/") {
// training slashes are usually tolerated, so we can get rid of one if it exists
preferred = preferred[:len(preferred)-1]
}
if strings.Contains(preferred, "/") {
// if the path contains a "/", use the last part
preferred = preferred[strings.LastIndex(preferred, "/")+1:]
}
if strings.Contains(preferred, "-") {
// the name usually follows a hyphen - e.g. github.com/foo/go-bar
// if the package name contains a "-", use the last part
preferred = preferred[strings.LastIndex(preferred, "-")+1:]
}
if strings.Contains(preferred, ".") {
// dot is commonly usually used as a version - e.g. github.com/foo/bar.v1
// if the package name contains a ".", use the first part
preferred = preferred[:strings.LastIndex(preferred, ".")]
}
return preferred
}