Jenkins Pipeline waitUntil bash命令返回特定字符串

Question

我有一个管道阶段，我等待从 sh 脚本返回某个字符串，并且只有当字符串匹配时，才继续到下一个阶段，但是，它无法按预期工作:

node('master') {
    stage("wait for bash completion") {
        waitUntil {
            def output = sh returnStdout: true, script: 'cat /tmp/test.txt'
            output == "hello"
        }
    }
    stage("execute after bash completed") {
        echo "the file says hello!!!"
    }
}

执行过程是这样的:

+ cat /tmp/test.txt
[Pipeline] }
Will try again after 0.25 sec
[Pipeline] {
[Pipeline] sh
[workspace] Running shell script
+ cat /tmp/test.txt
[Pipeline] }
Will try again after 0.3 sec
[Pipeline] {
[Pipeline] sh
[workspace] Running shell script
+ cat /tmp/test.txt
[Pipeline] }
Will try again after 0.36 sec
...
(so on and so forth)

我错过了什么？

Answer 1

来自waitUntil的帮助:

Runs its body repeatedly until it returns true. If it returns false, waits a while and tries again. --

您的执行输出看起来与等待 output == "hello" 匹配完全一样。也许文件 /tmp/test.txt 的内容并不完全是 hello。其中可能有一些空格，例如新行作为最后一个字符。