带有值列表的 Groovy Switch 语句

本文介绍了带有值列表的 Groovy Switch 语句的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我想在 Jenkins 流水线作业中使用 Switch 语句.

I want to use Switch statement in Jenkins pipeline job.

def version = "1.2"
switch(GIT_BRANCH) {
  case "develop":
    result = "dev"
    break
  case ["master", "support/${version}"]:
    result = "list"
    break
  case "support/${version}":
    result = "sup"
    break
  default:
    result = "def"
    break
}
echo "${result}"

当 GIT_BRANCH 等于:

develop - 返回值为 dev - OK
master - 返回值为 list - OK
support/1.2 - 返回值为 sup - 为什么不是 list?

develop - returned value is dev - OK
master - returned value is list - OK
support/1.2 - returned value is sup - why not list?

推荐答案

我的猜测是 GIT_BRANCH 的类型是 String 而 "support/${version}" 是一个 GString.如果您将后者转换为 String 它应该可以工作:

My guess is that the type of GIT_BRANCH is a String whereas "support/${version}" is a GString. If you convert the latter to a String it should work:

def version = "1.2"
switch(GIT_BRANCH) {
  case "develop":
    result = "dev"
    break
  case ["master", "support/${version}".toString()]:
    result = "list"
    break
  case "support/${version}":
    result = "sup"
    break
  default:
    result = "def"
    break
}
echo "${result}"

两种字符串类型之间的差异在相互比较时无关紧要，但对于其他类型的比较可能很重要，例如在您的代码中，您隐式地将 GString 与 List 的元素进行比较.

The difference between the two string types doesn't matter when comparing them to each other, but it can matter for other types of comparison, e.g. in your code you're implicitly comparing a GString with the elements of a List.

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