nightly.yaml

name: Nightly Build

on:
  schedule:
    - cron: '15 7 * * *'

jobs:
  # Only execute if the current commit does _not_ have a tag that starts with "nightly/".
  # This is intended to avoid creating a nightly build if there's no changes.
  check-should-execute:
    runs-on: windows-latest
    outputs:
      should_execute: ${{ steps.should_execute_step.outputs.should_execute }}
    steps:
      - uses: actions/checkout@v3

      - name: Get tags
        run: git fetch --tags origin

      - id: should_execute_step
        shell: bash
        run: |
          git tag --points-at ${{ github.sha }}
          if [ $(git tag --list nightly/* --points-at HEAD) ]; then
            echo "Nightly tag found, skipping build."
          else
            echo "No nightly tag found, building."
            echo "should_execute=true" >> $GITHUB_OUTPUT
          fi

  build:
    needs: check-should-execute
    if: ${{ needs.check-should-execute.outputs.should_execute }}
    uses: ./.github/workflows/build.yaml

  create-nightly-release:
    runs-on: windows-latest

    needs: [check-should-execute, build]
    if: ${{ needs.check-should-execute.outputs.should_execute }}

    permissions:
      contents: write

    steps:
    - name: Download artifacts
      uses: actions/download-artifact@v3
      with:
        path: release-artifacts/

    - name: Get the current date (UTC)
      id: get-date
      shell: bash
      run: |
        echo "nightly_date=$(date -u +%Y-%m-%d)" >> $GITHUB_OUTPUT
    
    # actions/download-artifact will unzip each artifact to its own directory, so we need to re-zip them.
    # We'll also replace the commit SHA with the date in the zip file name.
    - name: Re-zip each artifact
      shell: powershell
      run: |
        Get-ChildItem release-artifacts -Directory |
        Foreach-Object {
            Compress-Archive -Path $_.FullName -DestinationPath ("release-artifacts/" + ($_ -replace "[0-9a-z]{40}","${{ steps.get-date.outputs.nightly_date }}") + ".zip")
        }

    - name: Create a release
      uses: ncipollo/release-action@v1
      with:
        artifactErrorsFailBuild: true
        artifacts: "release-artifacts/*.zip"
        commit: ${{ github.sha }}
        generateReleaseNotes: true
        name: Nightly build for ${{ steps.get-date.outputs.nightly_date }} 
        prerelease: true
        skipIfReleaseExists: true
        tag: nightly/${{ steps.get-date.outputs.nightly_date }}