azure-pipelines-code-mirror.yml

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

# Moves code from GitHub into 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 Mirrored 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 $branch -eq "")
            {
              Write-Error "Expected valid branch and GitHub repo in the form of owner/repo"
            }
            Write-Host "##vso[task.setvariable variable=AzDORepoName]$azDORepo"
            Write-Host "Mirroring branch '$branch' from GitHub repo '$repo' to 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/$(AzDORepoName)
        displayName: Add Azure DevOps remote
        workingDirectory: $(WorkingDirectoryName)
      - script: |
          git reset --hard origin/$(BranchToMirror)
        displayName: Hard reset local branch to GitHub branch
        workingDirectory: $(WorkingDirectoryName)
      - task: PowerShell@2
        displayName: Push changes to Azure DevOps repo
        inputs:
          targetType: inline
          workingDirectory: $(WorkingDirectoryName)
          script: |
            git push azdo-mirror $(BranchToMirror) $(ExtraPushArgs)

            if ($LASTEXITCODE -EQ 0) {
              Write-Host "Push was successful"
              exit
            }

            git fetch azdo-mirror
            git fetch origin
            $commits = (git --no-pager rev-list origin/$(BranchToMirror)..azdo-mirror/$(BranchToMirror) | Measure-Object -line).Lines
            if ($commits -NE 0) {
              Write-Host "##vso[task.LogIssue type=error;]Mirror repository $(AzDORepoName) has unexpected commits"
              git --no-pager log origin/$(BranchToMirror)..azdo-mirror/$(BranchToMirror)
              exit 1
            }

            Write-Host "##vso[task.LogIssue type=warning;]Push failed for unknown reason"

            $retryattempt=0
            while ($retryattempt -LT 3) {
              $retryattempt+=1
              Write-Host "Retry attempt $retryattempt of 3 in 5 seconds..."
              Start-Sleep -Seconds 5

              git push azdo-mirror $(BranchToMirror) $(ExtraPushArgs)
              if ($LASTEXITCODE -EQ 0) {
                Write-Host "Push successful"
                exit
              }
            }

            Write-Host "##vso[task.LogIssue type=error;]git failed to push to Azure DevOps mirror"
            exit 1

      - 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"