CI: Extract the OpenWrt building to own sub workflow

Extract the building of OpenWrt into an own workflow which is then
triggered by the kernel.yml and packages.yml workflow with different
inputs. This allows us to share much of the code of the workflow.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
(cherry picked from commit 7c406a5f0837b0bfc293b723932695176a8ef6fe)

1 files changed, 93 insertions, 0 deletions

diff --git a/.github/workflows/check-kernel-patches.yml b/.github/workflows/check-kernel-patches.yml
new file mode 100644
index 0000000000..3608b5a3cc
--- /dev/null
+++ b/.github/workflows/check-kernel-patches.yml
@@ -0,0 +1,93 @@
+name: Refresh kernel for target
+
+on:
+  workflow_call:
+    inputs:
+      target:
+        required: true
+        type: string
+
+permissions:
+  contents: read
+
+jobs:
+  setup_build:
+    name: Setup build
+    runs-on: ubuntu-latest
+    outputs:
+      owner_lc: ${{ steps.lower_owner.outputs.owner_lc }}
+
+    steps:
+      - name: Set lower case owner name
+        id: lower_owner
+        run: |
+          OWNER_LC=$(echo "${{ github.repository_owner }}" \
+            | tr '[:upper:]' '[:lower:]')
+          echo "owner_lc=$OWNER_LC" >> $GITHUB_OUTPUT
+
+  check-patch:
+    name: Check Kernel patches
+    needs: setup_build
+    runs-on: ubuntu-latest
+
+    container: ghcr.io/${{ needs.setup_build.outputs.owner_lc }}/tools:latest
+
+    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: 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" >> "$GITHUB_ENV"
+
+      - name: Extract prebuilt tools
+        shell: su buildbot -c "sh -e {0}"
+        working-directory: openwrt
+        run: ./scripts/ext-tools.sh --tools /tools.tar
+
+      - name: Configure system
+        shell: su buildbot -c "sh -e {0}"
+        working-directory: openwrt
+        run: |
+          echo CONFIG_ALL_KMODS=y >> .config
+          echo CONFIG_DEVEL=y >> .config
+          echo CONFIG_AUTOREMOVE=y >> .config
+          echo CONFIG_CCACHE=y >> .config
+
+          echo "CONFIG_TARGET_${{ 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
+
+          . .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)"
+            exit 1
+          fi