azure-pipelines-merge-mirror.yml

# Disable CI triggers, only called using Maestro
trigger: none

# Merges code from GitHub into internal branches in internal repos
jobs:
- template: /eng/common/templates/jobs/jobs.yml
  parameters:
    enableTelemetry: true
    helixRepo: dotnet/arcade
    jobs:
    - job: Merge_GitHub_to_Azure_DevOps
      pool:
        name: Hosted VS2017
      variables:
      - name: WorkingDirectoryName
        value: repo-dir
      steps:
      - task: PowerShell@1
        displayName: Calculate Merge Branch Names
        inputs:
          scriptType: inlineScript
          arguments: '$(GithubRepo) $(BranchToMirror)'
          inlineScript: |
            param([string]$repo, [string]$branch)
          
            $azDORepo = $repo.Replace("/", "-");
            # Check that the parameters look correct
            if ($azDORepo -eq "" -or $branch -eq "")
            {
              Write-Error "Expected valid branch and GitHub repo in the form of owner/repo"
            }
            
            $targetBranch = "internal/$branch"
            Write-Host "##vso[task.setvariable variable=AzDORepoNameName]$azDORepo"
            Write-Host "##vso[task.setvariable variable=TargetBranchName]$targetBranch"
            Write-Host "Merging branch '$branch' in GitHub repo '$repo' to $targetBranch in Azure DevOps repo '$azDORepo'."
      - script: |
          git clone https://dotnet-maestro-bot:$(BotAccount-dotnet-maestro-bot-PAT)@github.com/$(GithubRepo) $(WorkingDirectoryName) -b $(BranchToMirror)
        displayName: Clone GitHub repo
      - script: |
          git remote add azdo-mirror https://dn-bot:$(dn-bot-dnceng-build-rw-code-rw)@dev.azure.com/dnceng/internal/_git/$(AzDORepoNameName)
        displayName: Add Azure DevOps remote
        workingDirectory: $(WorkingDirectoryName)
      - script: |
          git fetch azdo-mirror
        displayName: Fetch AzDO repo
        workingDirectory: $(WorkingDirectoryName)
      - script: |
          git checkout -b $(TargetBranchName) -t azdo-mirror/$(TargetBranchName) || git checkout -b $(TargetBranchName) -t azdo-mirror/$(BranchToMirror)
        displayName: Check out target branch
        workingDirectory: $(WorkingDirectoryName)
      - script: |
          git -c user.email="dotnet-bot@microsoft.com" -c user.name="dotnet-bot" merge origin/$(BranchToMirror) -m "Merge in '$(BranchToMirror)' changes" 
        displayName: Merge open to target branch
        workingDirectory: $(WorkingDirectoryName)
      - script: |
          git push azdo-mirror $(TargetBranchName) $(ExtraPushArgs)
        displayName: Push changes to Azure DevOps repo
        workingDirectory: $(WorkingDirectoryName)

      - task: PowerShell@1
        displayName: Broadcast target, branch, commit in metadata
        continueOnError: true
        condition: always()
        inputs:
          scriptType: inlineScript
          arguments: '$(GithubRepo) $(BranchToMirror)'
          workingDirectory: $(WorkingDirectoryName)
          inlineScript: |
            param([string]$repo, [string]$branch)

            $commit = (git rev-parse HEAD).Substring(0, 7)
            $target = "$repo $branch".Replace('/', ' ')

            Write-Host "##vso[build.updatebuildnumber]$target $commit"
            Write-Host "##vso[build.addbuildtag]$target"