当跳过默认签出时，Jenkins 管道 git checkout 访问 GIT_COMMIT

Question

观察结果：

詹金斯文件

pipeline {
    agent { node 'master' }

    stages {
        stage('Hello') {
            steps {
                echo env.GIT_COMMIT
            }
        }
    }
}

输出：

[Pipeline] }
[Pipeline] // stage
[Pipeline] withEnv
[Pipeline] {
[Pipeline] stage
[Pipeline] { (Hello)
[Pipeline] echo
e5b4b2deed1c8db486cef5641ef14c61fd48f9ed
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // withEnv
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline

詹金斯文件

pipeline {
    agent { node 'master' }
    
    options {
        skipDefaultCheckout(true)
    }

    stages {
        stage('Hello') {
            steps {
                checkout([$class: 'GitSCM', branches: [[name: '*/master']], extensions: [], userRemoteConfigs: [[url: '/tmp/r']]])
                echo env.GIT_COMMIT
            }
        }
    }
}

输出：

[Pipeline] node
Running on Jenkins in /var/jenkins_home/workspace/HelloWorld_master
[Pipeline] {
[Pipeline] stage
[Pipeline] { (Hello)
[Pipeline] checkout
Selected Git installation does not exist. Using Default
The recommended git tool is: NONE
No credentials specified
 > git rev-parse --resolve-git-dir /var/jenkins_home/workspace/HelloWorld_master/.git # timeout=10
Fetching changes from the remote Git repository
 > git config remote.origin.url /tmp/r # timeout=10
Fetching upstream changes from /tmp/r
 > git --version # timeout=10
 > git --version # 'git version 2.30.2'
 > git fetch --tags --force --progress -- /tmp/r +refs/heads/*:refs/remotes/origin/* # timeout=10
 > git rev-parse refs/remotes/origin/master^{commit} # timeout=10
Checking out Revision e5b4b2deed1c8db486cef5641ef14c61fd48f9ed (refs/remotes/origin/master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f e5b4b2deed1c8db486cef5641ef14c61fd48f9ed # timeout=10
Commit message: "init"
First time build. Skipping changelog.
[Pipeline] echo
null
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline

问题：

我使用的是jenkins版本2.349，该项目是多分支管道类型。

正如我在 Jenkins git 插件的 page 上读到的那样，它应该注入环境变量，但似乎只有在不跳过默认签出时才会执行，但在我们显式签出时则不会。我只能找到通过使用 script { } 块来访问这些 SCM 值（在我的例子中为 GIT_COMMIT）的方法。有没有办法在不跳入脚本块的情况下获取这些变量？

Answer 1

checkout() 调用返回一个具有 commit 属性的对象：

def result = checkout(...)
echo "Commit: ${result.GIT_COMMIT}"

请注意，这可能取决于安装的 git 插件的版本。