Jenkins pipeline: checkout explicit git commit

Question

I want to be able to say something like:

git branch: commitHash, credentialsId: credentialsId, url: url

The usecase: I\'m doing parallel build

Answer 1

Yuri G's example didn't work for me when jenkins lacked a workspace due to initial checkout. The following works in this case. I don't understand why they are all that different.

    def commitId = "<insert sha here>"

    checkout ( [$class: 'GitSCM',
        branches: [[name: commitId ]],
        userRemoteConfigs: [[
            credentialsId: 'deploy key for your repo', 
            url: 'repo url']]])

Answer 2

To checkout a specific hash from your repository, in Jenkins pipeline, you can do something like this:

pipeline {
  agent none
  options {
      timeout(time: 1, unit: 'HOURS')
  }
  environment {
    // Jenkins credentials for git auth
    SOURCECODE_JENKINS_CREDENTIAL_ID = 'sourcecode-credential'
    // URL of the repo
    SOURCE_CODE_URL = 'https://sourcecode.com/repo.git'
    // branch
    RELEASE_BRANCH = 'dev'
    // hash
    GIT_HASH = 'your_hash'
  }
  stages {
    stage('Git') {
      agent any
      steps {
        sleep(5)
        
       // Clean dir
        deleteDir()
        
        // Checkout branch
        git branch: "$RELEASE_BRANCH", credentialsId: "$SOURCECODE_JENKINS_CREDENTIAL_ID" , url: "$SOURCE_CODE_URL"
        
    // Checkout hash
        withCredentials([usernamePassword(credentialsId: "$SOURCECODE_JENKINS_CREDENTIAL_ID", usernameVariable: 'GIT_USER', passwordVariable: 'GIT_PASS')]) {
          sh "git checkout '$GIT_HASH'"
        }  
      }
    }
  }
}

Answer 3

Use a general scm step

checkout([$class: 'GitSCM', branches: [[name: commitHash ]],
     userRemoteConfigs: [[url: 'http://git-server/user/repository.git']]])