generate-release-notes.yml

name: 'Generate release notes'
run-name: '[${{ github.ref_name }}] Generate release notes'

on:
  workflow_dispatch:

permissions: {}

jobs:
  generate-release-notes:
    name: 'Generate release notes'
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write

    steps:
      - name: Checkout release branch
        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
        with:
          persist-credentials: false
          fetch-depth: 0 # Fetch the entire repo for the below git commit graph operations

      - name: Calculate release information
        run: |
          git fetch --tags

          # Grab the latest tag from the current branch. If it doesn't exist, grab the latest tag across all branches.
          last_release_tag=$(git describe --tags --abbrev=0 || git describe --tags $(git rev-list --tags --max-count=1))
          echo "Using tag: $last_release_tag"
          last_release_date=$(git log -1 --format=%aI "$last_release_tag")
          echo "last_release_date=$last_release_date" >> $GITHUB_ENV

          versionFile="./eng/Versions.props"
          release_version=$(perl -ne '/<VersionPrefix>([^<]*)/ && print $1' $versionFile)
          release_version_label=$(perl -ne '/<PreReleaseVersionLabel>([^<]*)/ && print $1' $versionFile)
          release_version_iteration=$(perl -ne '/<PreReleaseVersionIteration>([^<]*)/ && print $1' $versionFile)

          friendly_release_name=""
          qualified_release_version="$release_version-$release_version_label.$release_version_iteration"

          if [ "$release_version_label" == "rtm" ] || [ "$release_version_label" == "servicing" ]; then
            friendly_release_name="$release_version build"
            qualified_release_version="$release_version"
          elif [ "$release_version_label" == "rc" ]; then
            friendly_release_name="official $release_version Release Candidate"
          else
            friendly_release_name="next official preview version"
          fi

          release_note_path="./documentation/releaseNotes/releaseNotes.v${qualified_release_version}.md"
          echo "release_note_path=$release_note_path" >> $GITHUB_ENV
          echo "friendly_release_name=$friendly_release_name" >> $GITHUB_ENV
          echo "qualified_release_version=$qualified_release_version" >> $GITHUB_ENV

      - name: Checkout main
        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
        with:
          persist-credentials: true # We need to persist credentials to push the resulting changes upstream.
          ref: main

      - name: Generate release notes
        uses: ./.github/actions/generate-release-notes
        with:
          output: ${{ env.release_note_path }}
          last_release_date:  ${{ env.last_release_date }}
          build_description: ${{ env.friendly_release_name }}
          auth_token: ${{ secrets.GITHUB_TOKEN }}
          branch_name: ${{ github.ref_name }}

      - name: Open PR
        uses: ./.github/actions/open-pr
        with:
          files_to_commit: ${{ env.release_note_path }}
          title: "Add ${{ env.qualified_release_version }} release notes"
          commit_message: generate release notes
          body: Add ${{ env.qualified_release_version }} release notes. This PR was auto generated and will not be automatically merged in.
          branch_name: releaseNotes/${{ env.qualified_release_version }}
          fail_if_files_unchanged: true
          auth_token: ${{ secrets.GITHUB_TOKEN }}