release-body.yml

name: Generate release body
on:
  workflow_run:
    workflows: ["Test drivers against a matrix of kernels/distros"]
    types: [completed]
    branches-ignore: ['master'] # ignore master runs (we could skip this given the below extract semver check; still, this is a small optimization)
      
permissions:
  contents: write

concurrency:
  group: "release-body"
  cancel-in-progress: true

jobs:
  release-body:
    runs-on: ubuntu-latest
    steps:
      # Note: there is no `tag` filter for `workflow_run`.
      # We need to manually check whether we are running on a tag.
      - name: Extract semver ℹ️
        uses: actions-ecosystem/action-regex-match@v2
        id: regex-match
        with:
          text: ${{ github.event.workflow_run.head_branch }}
          regex: '[0-9]+.[0-9]+.[0-9]+\+driver$'

      - name: Skip on non driver tag
        if: steps.regex-match.outputs.match == ''
        run: exit 0
          
      - name: Download matrixes
        uses: dawidd6/action-download-artifact@v2
        with:
          workflow: kernel_tests.yaml
          name: matrix_*
          name_is_regexp: true
          run_id: ${{ github.event.workflow_run.id }}
      
      # Steps:
      # Remove everything after the table (ie: since the first line that starts with "# ",
      # ie: a markdown section start.
      # Remove links to the markdown sections in the table too.
      # Then, add a small title to each matrix
      # Finally, merge them together
      - name: Append matrixes to create release body
        run: |
          mv matrix_*/*.md .
          sed -i -n '/# /q;p' matrix_X64.md
          sed -i -n '/# /q;p' matrix_ARM64.md
          sed -i 's/\[\(.\)\]([^)]*)/\1/g' matrix_X64.md
          sed -i 's/\[\(.\)\]([^)]*)/\1/g' matrix_ARM64.md
          sed -i '1s/^/# Driver Testing Matrix amd64\n\n/' matrix_X64.md
          sed -i '1s/^/# Driver Testing Matrix arm64\n\n/' matrix_ARM64.md
          cat matrix_X64.md matrix_ARM64.md > release-body.md

      - name: Release
        uses: softprops/action-gh-release@v1
        with:
          body_path: ./release-body.md
          append_body: true
          tag_name: ${{ github.event.workflow_run.head_branch }}