This YAML script is an Azure DevOps pipeline configuration for building, testing, and deploying an ASP.NET Core application to both Test and Production environments, with the Production deployment requiring a successful Test deployment and utilizing slot swapping for zero-downtime deployment.

pipeline.yaml

trigger:
- main

stages:
- stage: Build
  displayName: 'Build and Test'
  jobs:
  - job: BuildJob
    displayName: 'Build Job'
    pool:
      vmImage: 'ubuntu-latest'
    steps:
    - task: DotNetCoreCLI@2
      displayName: 'Restore Packages'
      inputs:
        command: 'restore'
        projects: '**/*.csproj'

    - task: DotNetCoreCLI@2
      displayName: 'Build Solution'
      inputs:
        command: 'build'
        projects: '**/*.csproj'
        arguments: '--configuration Release'

    - task: DotNetCoreCLI@2
      displayName: 'Run Tests'
      inputs:
        command: 'test'
        projects: '**/*Tests/*.csproj'
        arguments: '--configuration Release'

    - task: DotNetCoreCLI@2
      displayName: 'Publish Artifacts'
      inputs:
        command: 'publish'
        publishWebProjects: true
        arguments: '--configuration Release --output $(Build.ArtifactStagingDirectory)'
        zipAfterPublish: true

    - task: PublishBuildArtifacts@1
      displayName: 'Upload Artifacts'
      inputs:
        pathtoPublish: '$(Build.ArtifactStagingDirectory)'
        artifactName: 'drop'

- stage: DeployTest
  displayName: 'Deploy to Test Environment'
  dependsOn: Build
  condition: succeeded('Build')
  jobs:
  - deployment: DeployTestJob
    displayName: 'Deploy Test Job'
    environment: 'Test'
    pool:
      vmImage: 'ubuntu-latest'
    strategy:
      runOnce:
        deploy:
          steps:
          - task: DownloadBuildArtifacts@0
            displayName: 'Download Artifacts'
            inputs:
              buildType: 'current'
              artifactName: 'drop'
              downloadPath: '$(System.ArtifactsDirectory)'

          - task: AzureWebApp@1
            displayName: 'Deploy to Test Environment'
            inputs:
              azureSubscription: '$(AzureSubscriptionName)'
              appName: '$(AppServiceName)'
              appType: 'webApp'
              package: '$(System.ArtifactsDirectory)/drop/**/*.zip'
              slotName: 'staging'

- stage: DeployProduction
  displayName: 'Deploy to Production Environment'
  dependsOn: DeployTest
  condition: succeeded('DeployTest')
  jobs:
  - deployment: DeployProductionJob
    displayName: 'Deploy Production Job'
    environment: 'Production'
    pool:
      vmImage: 'ubuntu-latest'
    strategy:
      runOnce:
        deploy:
          steps:
          - task: AzureAppServiceManage@0
            displayName: 'Swap Slots'
            inputs:
              azureSubscription: '$(AzureSubscriptionName)'
              action: 'Swap Slots'
              webAppName: '$(AppServiceName)'
              ResourceGroupName: '$(RgName)'
              sourceSlot: 'staging'