最近在学习Jenkins。在学习Build a Node.js and React app with npm (opens new window)部分时，按照官网给的simple-node-js-react-npm-app例子，需要跑一个pipeline，配置文件Jenkifile如下

pipeline {
  agent any
  environment {
    CI = 'true'
  }
  stages {
    stage('Build') {
      steps {
        sh 'npm install'
      }
    }
    stage('Test') {
      steps {
        sh './jenkins/scripts/test.sh'
      }
    }
    stage('Deliver') {
      steps {
        sh './jenkins/scripts/deliver.sh'
        input message: 'Finished using the web site? (Click "Proceed" to continue)'
        sh './jenkins/scripts/kill.sh'
      }
    }
  }
}

但在运行时总报下面的错误：

java.io.IOException: Cannot run program "nohup" (in directory "C:\Users\king\.jenkins\workspace\node-pipeline-demo"): CreateProcess error=2, 系统找不到指定的文件。

有答案说sh是Linux用的，window应该用bat，我将sh改成bat还是没有解决。

最后在stackoverflow (opens new window)上面找到了原因和一个比较满意的答案，

原因是在Windows下，使用了如下路径：

• mklink "C:\Program Files\Git\cmd\nohup.exe" "C:\Program Files\git\usr\bin\nohup.exe"
• mklink "C:\Program Files\Git\cmd\msys-2.0.dll" "C:\Program Files\git\usr\bin\msys-2.0.dll"
• mklink "C:\Program Files\Git\cmd\msys-iconv-2.dll" "C:\Program Files\git\usr\bin\msys-iconv-2.dll"
• mklink "C:\Program Files\Git\cmd\msys-intl-8.dll" "C:\Program Files\git\usr\bin\msys-intl-8.dll"

解决步骤如下

• 下载git-bash (opens new window)，例如安装目录是C:\Program Files\Git
• 将C:\Program Files\Git\bin注册到环境变量下， 注意注册环境变量后，可能需要重启才能生效，我重启后就没报错了。
• 在使用git-bash时，使nohup对Jenkins可用。以管理员身份运行windows cmd，然后输入下列命令：

mklink "C:\Program Files\Git\bin\nohup.exe" "C:\Program Files\git\usr\bin\nohup.exe"

mklink "C:\Program Files\Git\bin\msys-2.0.dll" "C:\Program Files\git\usr\bin\msys-2.0.dll"

mklink "C:\Program Files\Git\bin\msys-iconv-2.dll" "C:\Program Files\git\usr\bin\msys-iconv-2.dll"

mklink "C:\Program Files\Git\bin\msys-intl-8.dll" "C:\Program Files\git\usr\bin\msys-intl-8.dll"

参考文献

Jenkins pipeline sh fail with “cannot run program nohup” on windows (opens new window)