Increment Build Version Azure DevOps pipelines

Very often DevPos eng have to increment Build version in CI/CD:

I use Azure DevOps and TFS tools. You cat save variable between tasks by 

• echo "##vso[task.setvariable variable=BuildVersion; isOutput=false]$BuildVersionlocal"
  echo "##vso[build.updatebuildnumber]$BuildNumber"
  

  But this is not enough when you increment version between builds. So you have to save changes in somewhere... I save in repo by git push.  But for this I have to solve tasks:

  • For self-host agent or pool vmImage authorize in github

  • generate, save, sink, use PAT or sshKey/sshkeyPub 

  • git push changes to REPO

So I have steps:

1. Generate  sshKey/sshkeyPub  on Linux host

   • ssh-keygen -t ed25519 -C "Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript."
     chmod =600 ~/.ssh/id_ed25519
     cat /root/.ssh/id_ed25519.pub
     cat /root/.ssh/id_ed25519

2. add to GitHud portal 
   • https://github.com/settings/ssh/new
   • https://docs.github.com/en/authentication/connecting-to-github-with-ssh/adding-a-new-ssh-key-to-your-github-account
3. Export and save Public key and PUB to Azure Library secure files
   • https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/utility/download-secure-file?view=azure-devops
   • https://docs.microsoft.com/en-us/azure/devops/pipelines/library/?view=azure-devops
4. Import to pool agent and use this for authorize in Repo Portal. Create this Yml
5. create this YML, 

•  trigger:
    branches:
      include:
      - master
    paths:
     exclude:
       - 'CI/Untrig/*'
  resources:
  - repo: self
  pool:
    vmImage: 'ubuntu-latest'
  variables:
    app: 'app'
    env: 'sandbox'
    tag: '$(Build.BuildId)'
  #########  GIT ##################################################
    GitBranch: 'master'
    GitLink: 'Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.:sergharkov/AKS.git'
    GitUserName: 'Azure_DevOps_Pipeline '
    GitUserMAil: 'Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.'
  ########  Increment file  ############################################  
    VarFileVersion: '$(Build.SourcesDirectory)/CI/UnTriger/CI-Version.txt'
    
  stages:
  - stage: Build
    displayName: Build image
    jobs:
    - job: Build
      displayName: Build
      steps:       
      - task: DownloadSecureFile@1
        inputs:
          secureFile: 'id_ed25519'
      - task: DownloadSecureFile@1
        inputs:
          secureFile: 'id_ed25519.pub'
      - task: Bash@3
        displayName: IncrementVar
        name: IncrementVar
        inputs:
          targetType: 'inline'
          script: |
            echo '#########################add public key ##########################'
            ls -l $(Agent.TempDirectory)
            mkdir -p ~/.ssh
            touch ~/.ssh/known_hosts
            ssh-keyscan github.com >> ~/.ssh/known_hosts
            cp -f $(Agent.TempDirectory)/id_ed25519 ~/.ssh/
            cp -f $(Agent.TempDirectory)/id_ed25519.pub ~/.ssh/
            chmod =600 ~/.ssh/id_ed25519
  
            echo -e '\n##########################git pull################################'
            git remote set-url origin $(GitLink)
            git checkout $(GitBranch)
            git config --global user.email $(GitUserMail)
            git config --global user.name $(GitUserName)
            git pull origin $(GitBranch)
  
            echo "####################### Increment #################################"
            OldVersion=$(cat  $(VarFileVersion) |  grep -oP '<Version>\K.*(?=</Version>)')
            BuildNumber=$(($(echo $OldVersion | awk -F '.' '{print $3}')+1))
            echo "OldVersion        "$OldVersion
            echo "BuildNumber       "$BuildNumber
            echo "DargVersion       "$(DargVersion)
            echo "VarFileVersion    "$(VarFileVersion)
            DargVersionLocal="$(DargVersion).$BuildNumber.$(env)"
            echo "<Version>$DargVersionLocal</Version>" > $(VarFileVersion)
  
            echo "######################## git push ################################"
            git add $(VarFileVersion)
            git commit -m "change file version.txt add Version $NewVersion"
            git status
            git push origin $(GitBranch)
            echo "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
  
            ####change global variables##################
            echo "##vso[task.setvariable variable=DargVersion; isOutput=false]$DargVersionLocal"
            echo "##vso[build.updatebuildnumber]$BuildNumber"