name: Refresh kernel for target

on:
  workflow_call:
    inputs:
      target:
        required: true
        type: string
      testing:
        type: boolean
      use_openwrt_container:
        type: boolean
        default: true

permissions:
  contents: read

jobs:
  setup_build:
    name: Setup build
    runs-on: ubuntu-latest
    outputs:
      owner_lc: ${{ steps.lower_owner.outputs.owner_lc }}
      container_tag: ${{ steps.determine_tools_container.outputs.container_tag }}

    steps:
      - name: Set lower case owner name
        id: lower_owner
        run: |
          OWNER_LC=$(echo "${{ github.repository_owner }}" \
            | tr '[:upper:]' '[:lower:]')

          if [ ${{ inputs.use_openwrt_container }} == "true" ]; then
            OWNER_LC=openwrt
          fi

          echo "owner_lc=$OWNER_LC" >> $GITHUB_OUTPUT

      # Per branch tools container tag
      # By default stick to latest
      # For official test targetting openwrt stable branch
      # Get the branch or parse the tag and push dedicated tools containers
      # For local test to use the correct container for stable release testing
      # you need to use for the branch name a prefix of openwrt-[0-9][0-9].[0-9][0-9]-
      - name: Determine tools container tag
        id: determine_tools_container
        run: |
          CONTAINER_TAG=latest
          if [ -n "${{ github.base_ref }}" ]; then
            if echo "${{ github.base_ref }}" | grep -q -E '^openwrt-[0-9][0-9]\.[0-9][0-9]$'; then
              CONTAINER_TAG="${{ github.base_ref }}"
            fi
          elif [ ${{ github.ref_type }} == "branch" ]; then
            if echo "${{ github.ref_name }}" | grep -q -E '^openwrt-[0-9][0-9]\.[0-9][0-9]$'; then
              CONTAINER_TAG=${{ github.ref_name }}
            elif echo "${{ github.ref_name }}" | grep -q -E '^openwrt-[0-9][0-9]\.[0-9][0-9]-'; then
              CONTAINER_TAG="$(echo ${{ github.ref_name }} | sed 's/^\(openwrt-[0-9][0-9]\.[0-9][0-9]\)-.*/\1/')"
            fi
          elif [ ${{ github.ref_type }} == "tag" ]; then
            if echo "${{ github.ref_name }}" | grep -q -E '^v[0-9][0-9]\.[0-9][0-9]\..+'; then
              CONTAINER_TAG=openwrt-"$(echo ${{ github.ref_name }} | sed 's/^v\([0-9][0-9]\.[0-9][0-9]\)\..\+/\1/')"
            fi
          fi
          echo "Tools container to use tools:$CONTAINER_TAG"
          echo "container_tag=$CONTAINER_TAG" >> $GITHUB_OUTPUT

  check-patch:
    name: Check Kernel patches
    needs: setup_build
    runs-on: ubuntu-latest

    container: ghcr.io/${{ needs.setup_build.outputs.owner_lc }}/tools:${{ needs.setup_build.outputs.container_tag }}

    permissions:
      contents: read
      packages: read

    steps:
      - name: Checkout master directory
        uses: actions/checkout@v3
        with:
          path: openwrt

      - name: Fix permission
        run: |
          chown -R buildbot:buildbot openwrt

      - name: Opt-out from Git stricter repository ownership checks
        run: |
          git config --global --add safe.directory '*'

      - name: Initialization environment
        run: |
          TARGET=$(echo ${{ inputs.target }} | cut -d "/" -f 1)
          SUBTARGET=$(echo ${{ inputs.target }} | cut -d "/" -f 2)
          echo "TARGET=$TARGET" >> "$GITHUB_ENV"
          echo "SUBTARGET=$SUBTARGET" >> "$GITHUB_ENV"

      - name: Prepare prebuilt tools
        shell: su buildbot -c "sh -e {0}"
        working-directory: openwrt
        run: |
          mkdir -p staging_dir build_dir
          ln -sf /prebuilt_tools/staging_dir/host staging_dir/host
          ln -sf /prebuilt_tools/build_dir/host build_dir/host

          ./scripts/ext-tools.sh --refresh

      - name: Configure testing kernel
        if: inputs.testing == true
        shell: su buildbot -c "sh -e {0}"
        working-directory: openwrt
        run: |
          echo CONFIG_TESTING_KERNEL=y >> .config

      - name: Configure system
        shell: su buildbot -c "sh -e {0}"
        working-directory: openwrt
        run: |
          echo CONFIG_ALL_KMODS=y >> .config
          echo CONFIG_DEVEL=y >> .config
          echo CONFIG_AUTOREMOVE=y >> .config
          echo CONFIG_CCACHE=y >> .config

          echo "CONFIG_TARGET_${{ env.TARGET }}=y" >> .config
          echo "CONFIG_TARGET_${{ env.TARGET }}_${{ env.SUBTARGET }}=y" >> .config

          make defconfig

      - name: Build tools
        shell: su buildbot -c "sh -e {0}"
        working-directory: openwrt
        run: make tools/quilt/compile -j$(nproc) BUILD_LOG=1 || ret=$? .github/workflows/scripts/show_build_failures.sh

      - name: Refresh Kernel patches
        shell: su buildbot -c "sh -e {0}"
        working-directory: openwrt
        run: make target/linux/refresh V=s

      - name: Validate Refreshed Kernel Patches
        working-directory: openwrt
        run: |
          . .github/workflows/scripts/ci_helpers.sh

          if git diff --name-only --exit-code; then
            success "Kernel patches for ${{ env.TARGET }}/${{ env.SUBTARGET }} seems ok"
          else
            err "Kernel patches for ${{ env.TARGET }}/${{ env.SUBTARGET }} require refresh. (run 'make target/linux/refresh' and force push this pr)"
            err "You can also check the provided artifacts with the refreshed patch from this CI run."
            mkdir ${{ env.TARGET }}-${{ env.SUBTARGET }}-refreshed
            for f in $(git diff --name-only); do
              cp --parents $f ${{ env.TARGET }}-${{ env.SUBTARGET }}-refreshed/
            done
            exit 1
          fi

      - name: Upload Refreshed Patches
        if: failure()
        uses: actions/upload-artifact@v3
        with:
          name: ${{ env.TARGET }}-${{ env.SUBTARGET }}-refreshed
          path: openwrt/${{ env.TARGET }}-${{ env.SUBTARGET }}-refreshed