# Main pipeline spec for CI/CD on Azure Pipelines.

trigger:
  branches:
    include:
    - master
    - rc

# We cannot use Pipeline's matrixing framework because only it works with
# *runtime variables*, while we want to use templates with *parameters* which
# are evaluated at *compile time* only. By coding our matrixing data as
# top-level parameters, we can use them in compile-time template evaluation
# (`${{ }}` expressions) to achieve a matrixing effect. Only a few *variables*
# can be used at compile time: see "Available in templates?" in the table at:
# https://docs.microsoft.com/en-us/azure/devops/pipelines/build/variables?view=azure-devops&tabs=yaml
# This is why some platform-specific steps use `condition:` terms rather than
# compile-time `${{ if }}:` statements.
parameters:
  - name: builds
    type: object
    default:
    - name: linux_stable
      vmImage: ubuntu-20.04
      params:
        primaryBuild: true
      vars:
        TARGET: x86_64-unknown-linux-gnu
        TOOLCHAIN: stable

    - name: linux_beta
      vmImage: ubuntu-20.04
      params:
        canaryBuild: true
      vars:
        TARGET: x86_64-unknown-linux-gnu
        TOOLCHAIN: beta

    - name: linux_nightly
      vmImage: ubuntu-20.04
      params:
        canaryBuild: true
      vars:
        TARGET: x86_64-unknown-linux-gnu
        TOOLCHAIN: nightly

    - name: windows_msvc
      vmImage: windows-2019
      params: {}
      vars:
        TARGET: x86_64-pc-windows-msvc
        TOOLCHAIN: stable-x86_64-pc-windows-msvc

    - name: windows_gnu
      vmImage: windows-2019
      params: {}
      vars:
        TARGET: x86_64-pc-windows-gnu
        TOOLCHAIN: stable-x86_64-pc-windows-gnu

    - name: macos
      vmImage: macos-11
      params: {}
      vars:
        TARGET: x86_64-apple-darwin
        TOOLCHAIN: stable

stages:
- stage: BuildAndTest
  jobs:
  - ${{ each build in parameters.builds }}:
    - job: ${{ format('build_{0}', build.name) }}
      pool:
        vmImage: ${{ build.vmImage }}
      steps:
      - template: azure-build-and-test.yml
        parameters:
          ${{ insert }}: ${{ build.params }}
      variables:
        ${{ insert }}: ${{ build.vars }}

# If all of those succeed and we're not in a pull request, run the deployment
# pipeline. If we're specifically on the `rc` branch, this will finalize any
# releases.
- stage: Deploy
  condition: and(succeeded('BuildAndTest'), not(eq(variables['build.reason'], 'PullRequest')))
  jobs:
  - deployment: Deploy
    environment: Deploy
    displayName: Deploy
    pool:
      vmImage: ubuntu-20.04

    variables:
    - group: Deployment Credentials

    strategy:
      runOnce:
        deploy:
          steps:
            - template: azure-deployment.yml
              parameters:
                rcBuild: ${{ eq(variables['Build.SourceBranchName'], 'rc') }}