openwrt/.github/workflows/label-kernel.yml

# ci:kernel:x86:64 is going to trigger CI kernel check jobs for x86/64 target

name: Build kernel and check patches for target specified in labels
on:
  pull_request:
    types:
      - labeled

jobs:
  set_target:
    if: startsWith(github.event.label.name, 'ci:kernel:')
    name: Set target
    runs-on: ubuntu-latest
    outputs:
      targets_subtargets: ${{ steps.set_target.outputs.targets_subtargets }}
      targets: ${{ steps.set_target.outputs.targets }}

    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Parse label
        id: parse_label
        env:
          CI_EVENT_LABEL_NAME: ${{ github.event.label.name }}
        run: |
          echo "$CI_EVENT_LABEL_NAME" | sed -n 's/ci:kernel:\([^:]*\):\([^:]*\):*\([^:]*\)$/target=\1/p' | tee --append $GITHUB_OUTPUT
          echo "$CI_EVENT_LABEL_NAME" | sed -n 's/ci:kernel:\([^:]*\):\([^:]*\):*\([^:]*\)$/subtarget=\2/p' | tee --append $GITHUB_OUTPUT
          echo "$CI_EVENT_LABEL_NAME" | sed -n 's/ci:kernel:\([^:]*\):\([^:]*\):*\([^:]*\)$/testing=\3/p' | tee --append $GITHUB_OUTPUT

      - name: Set targets
        id: set_target
        run: |
          ALL_TARGETS="$(perl ./scripts/dump-target-info.pl kernels 2>/dev/null)"

          TARGETS_SUBTARGETS="$(echo "$ALL_TARGETS" | sort -u -t '/' -k1)"
          TARGETS="$(echo "$ALL_TARGETS" | sort -u -t '/' -k1,1)"

          [ "${{ steps.parse_label.outputs.subtarget }}" = "first" ] && TARGETS_SUBTARGETS=$TARGETS

          JSON_TARGETS_SUBTARGETS='['
          FIRST=1
          while IFS= read -r line; do
            TARGET_SUBTARGET=$(echo $line | cut -d " " -f 1)
            TARGET=$(echo $TARGET_SUBTARGET | cut -d "/" -f 1)
            SUBTARGET=$(echo $TARGET_SUBTARGET | cut -d "/" -f 2)

            [ "${{ steps.parse_label.outputs.target }}" != "all" ] && [ "${{ steps.parse_label.outputs.target }}" != "$TARGET" ] && continue
            [ "${{ steps.parse_label.outputs.subtarget }}" != "all" ] && [ "${{ steps.parse_label.outputs.subtarget }}" != "first" ] &&
              [ "${{ steps.parse_label.outputs.subtarget }}" != $SUBTARGET ] && continue
            if [ "${{ steps.parse_label.outputs.testing }}" = "testing" ]; then
              TESTING_KERNEL_VER=$(echo $line | cut -d " " -f 3)
              [ -z "$TESTING_KERNEL_VER" ] && continue
            fi

            TUPLE='{"target":"'"$TARGET"'","subtarget":"'"$SUBTARGET"'","testing":"'"$TESTING_KERNEL_VER"'"}'
            [[ $FIRST -ne 1 ]] && JSON_TARGETS_SUBTARGETS="$JSON_TARGETS_SUBTARGETS"','
            JSON_TARGETS_SUBTARGETS="$JSON_TARGETS_SUBTARGETS""$TUPLE"
            FIRST=0
          done <<< "$TARGETS_SUBTARGETS"
          JSON_TARGETS_SUBTARGETS="$JSON_TARGETS_SUBTARGETS"']'

          JSON_TARGETS='['
          FIRST=1
          while IFS= read -r line; do
            TARGET_SUBTARGET=$(echo $line | cut -d " " -f 1)
            TARGET=$(echo $TARGET_SUBTARGET | cut -d "/" -f 1)
            SUBTARGET=$(echo $TARGET_SUBTARGET | cut -d "/" -f 2)

            [ "${{ steps.parse_label.outputs.target }}" != "all" ] && [ "${{ steps.parse_label.outputs.target }}" != $TARGET ] && continue
            if [ "${{ steps.parse_label.outputs.testing }}" = "testing" ]; then
              TESTING_KERNEL_VER=$(echo $line | cut -d " " -f 3)
              [ -z "$TESTING_KERNEL_VER" ] && continue
            fi

            TUPLE='{"target":"'"$TARGET"'","subtarget":"'"$SUBTARGET"'","testing":"'"$TESTING_KERNEL_VER"'"}'
            [[ $FIRST -ne 1 ]] && JSON_TARGETS="$JSON_TARGETS"','
            JSON_TARGETS="$JSON_TARGETS""$TUPLE"
            FIRST=0
          done <<< "$TARGETS"
          JSON_TARGETS="$JSON_TARGETS"']'

          echo -e "\n---- targets to build ----\n"
          echo "$JSON_TARGETS_SUBTARGETS"
          echo -e "\n---- targets to build ----\n"

          echo -e "\n---- targets to check patch ----\n"
          echo "$JSON_TARGETS"
          echo -e "\n---- targets to check patch ----\n"

          echo "targets_subtargets=$JSON_TARGETS_SUBTARGETS" >> $GITHUB_OUTPUT
          echo "targets=$JSON_TARGETS" >> $GITHUB_OUTPUT

  build_kernel:
    name: Build Kernel with external toolchain
    needs: set_target
    permissions:
      contents: read
      packages: read
      actions: write
    uses: ./.github/workflows/build.yml
    strategy:
       fail-fast: False
       matrix:
         include: ${{fromJson(needs.set_target.outputs.targets_subtargets)}}
    with:
      container_name: toolchain
      target: ${{ matrix.target }}
      subtarget: ${{ matrix.subtarget }}
      testing: ${{ matrix.testing != '' && true }}
      build_kernel: true
      build_all_kmods: true

  check-kernel-patches:
    name: Check Kernel patches
    needs: set_target
    permissions:
      contents: read
      packages: read
      actions: write
    strategy:
       fail-fast: False
       matrix:
         include: ${{fromJson(needs.set_target.outputs.targets)}}
    uses: ./.github/workflows/check-kernel-patches.yml
    with:
      target: ${{ matrix.target }}
      subtarget: ${{ matrix.subtarget }}
      testing: ${{ matrix.testing != '' && true }}