如何使用Jenkins管道编写环境变量

Question

如何在Jenkins管道中用writeFile写出环境变量？这似乎是一项简单的任务，但我找不到任何有关如何使其工作的文档。

我试过$VAR，${VAR}和${env.VAR}，什么都行不通......？

Answer 1

在声明性管道中（使用writeFile的脚本块），它将如下所示：

pipeline {
    agent any

    environment {
        SENTENCE = 'Hello World\n'
    }

    stages {
        stage('Write') {
            steps {
                script {
                    writeFile file: 'script.txt', text: env.SENTENCE
                }
            }
        }

        stage('Verify') {
            steps {
                sh 'cat script.txt'
            }
        }
    }
}

输出：

...
[Pipeline] { (Verify)
[Pipeline] sh
[test] Running shell script
+ cat script.txt
Hello World
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // withEnv
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
Finished: SUCCESS

如果你想避免groovy，这也会有效：

writeFile file: 'script.txt', text: "${SENTENCE}"

要将env var与文本组合，您可以执行以下操作：

...
environment {
    SENTENCE = 'Hello World'
}
...

writeFile file: 'script.txt', text: env.SENTENCE + ' is my newest sentence!\n'