Jenkins並行管道：參數塊中的所有子例程調用都從最後一個塊傳遞參數

Question

我在尋求幫助，瞭解Groovy閉包發生了什麼，以及什麼是「正確」的做法。我有一個Jenkins管道，我在5個平行分支中調用子程序;它需要一個參數，其實際值是一個字符串常量 - 在並行分支的每個調用中不同的參數。我所看到的是，所有5個處決接收的最後並聯支路命名字符串常量：

段：

def build_if_needed = { project -> 
    println "build_if_needed: $project" 
    // ultimately this will kick off a build job... 
} 

parallel (
    aaa : { build_if_needed('aaa')}, 
    bbb : { build_if_needed('bbb')}, 
    ccc : { build_if_needed('ccc')}, 
    ddd : { build_if_needed('ddd')}, 
    eee : { build_if_needed('eee')}, 
) 

輸出：

[Pipeline] parallel 
[Pipeline] [aaa] { (Branch: aaa) 
[Pipeline] [bbb] { (Branch: bbb) 
[Pipeline] [ccc] { (Branch: ccc) 
[Pipeline] [ddd] { (Branch: ddd) 
[Pipeline] [eee] { (Branch: eee) 
[Pipeline] [aaa] echo 
[aaa] build_if_needed: eee 
[Pipeline] [aaa] } 
[Pipeline] [bbb] echo 
[bbb] build_if_needed: eee 
[Pipeline] [bbb] } 
[Pipeline] [ccc] echo 
[ccc] build_if_needed: eee 
[Pipeline] [ccc] } 
[Pipeline] [ddd] echo 
[ddd] build_if_needed: eee 
[Pipeline] [ddd] } 
[Pipeline] [eee] echo 
[eee] build_if_needed: eee 
[Pipeline] [eee] } 
[Pipeline] // parallel 
[Pipeline] End of Pipeline 

我期待的參數值傾倒在[aaa]中是'aaa'，而不是'eee'。它是一個固定的字符串常量，作爲參數傳遞。爲什麼所有5次執行的'build_if_needed'從最終的並行調用中接收到字符串常量？我錯過了什麼？

有沒有辦法做我想做的事情？

Answer 1

這被認爲是一個基本上是duplicate question的bug。它已被修正爲Groovy Pipeline 2.35。

Answer 2

它在我的情況下，運作良好（詹金斯2.7.4）使用方法，而不是封閉的：

def build_if_needed(project) { 
    println "build_if_needed: $project" 
    // ultimately this will kick off a build job... 
} 

parallel (
    aaa : { build_if_needed('aaa')}, 
    bbb : { build_if_needed('bbb')}, 
    ccc : { build_if_needed('ccc')}, 
    ddd : { build_if_needed('ddd')}, 
    eee : { build_if_needed('eee')} 
) 

以我的經驗，你應該避免使用封閉儘可能多的，你可以在管道的腳本。 Jenkins似乎有問題來處理關閉，如https://issues.jenkins-ci.org/browse/JENKINS-26481。