Basic YAML pipeline for Python Function App

trigger:
  branches:
    include:
    # This will ensure that the pipeline is only triggered when the code changes are made to the 'master' branch.
    - master
  paths:
    include:
    # This will ensure that the pipeline is only triggered when coomits/PR contain changes in this particular
    # folder. You can of course choose to omit this, if you always want it to trigger, regardless of what code
    # is changed in the repository.
    -  'source/code/path/*'

variables:
  bin: '$(Build.BinariesDirectory)'
  zip: '$(Build.ArtifactStagingDirectory)/$(Build.BuildId).zip'

jobs:
- job: Build
  displayName: Build
  pool:
    # You can use 'ubuntu-latest' here as well. Currently translates to 18.04. 20.04 is currently in preview,
    # and I do not recommend using it (I used not long ago, and it was causing a lot of issues). If you go
    # with 'ubuntu-latest', be prepared for a pipeline that'll potentially start breaking when 'latest'
    # will translate to 20.04.
    vmImage: ubuntu-18.04

  steps:
  - task: DeleteFiles@1
    inputs:
     SourceFolder: '$(bin)'

  # I don't really know if this step is needed. I haven't built any python function apps, but it was part of the template file,
  # so I thought it would be a good idea to include it here as well. If you know better, do with it whatever you want. :-)
  - bash: |
      if [ -f extensions.csproj ]
      then
          dotnet build extensions.csproj --runtime ubuntu.16.04-x64 --output ./bin
      fi
    workingDirectory: $(bin)
    displayName: 'Build extensions'

  # Functions V2 supports Python 3.6 as of today
  - task: UsePythonVersion@0
    displayName: 'Use Python 3.6'
    inputs:
      versionSpec: 3.6

  - bash: |
      python -m venv worker_venv
      source worker_venv/bin/activate
      pip install -r requirements.txt
    workingDirectory: $(bin)
    displayName: 'Install application dependencies'

  - task: ArchiveFiles@2
    displayName: 'Archive files'
    inputs:
      rootFolderOrFile: '$(bin)'
      includeRootFolder: false
      archiveType: zip
      archiveFile: '$(zip)'
      replaceExistingArchive: true

  # You probably want to change the name of the artifact ;-)
  - task: PublishBuildArtifacts@1
    displayName: 'Publish articats'
    inputs:
     ArtifactName: 'My precious'
     PathtoPublish: '$(zip)'