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>

.github/workflows/packages.yml

@@ -22,132 +22,20 @@ 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
-
   build:
-    name: Build all core packages
-    needs: setup_build
-    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: read
     strategy:
       fail-fast: False
       matrix:
         include:
-          - name: malta-be
-            target: malta
-            subtarget: be
-          - name: x86-64
-            target: x86
-            subtarget: 64
+          - target: malta/be
+          - target: x86/64
+    uses: ./.github/workflows/build.yml
+    with:
+      target: ${{ matrix.target }}
+      build_all_kmods: true
+      build_all_modules: true
+      build_full: true
 
-    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 ${{ matrix.target }})
-          SUBTARGET=$(echo ${{ matrix.subtarget }})
-          echo "TARGET=$TARGET" >> "$GITHUB_ENV"
-          echo "SUBTARGET=$SUBTARGET" >> "$GITHUB_ENV"
-
-      - name: Parse toolchain file
-        working-directory: openwrt
-        run: |
-          TOOLCHAIN_STRING="$(curl "https://downloads.cdn.openwrt.org/snapshots/targets/${{ env.TARGET }}/${{ env.SUBTARGET }}/sha256sums" \
-            | grep ".*openwrt-toolchain.*tar.xz")"
-          TOOLCHAIN_FILE=$(echo "$TOOLCHAIN_STRING" | sed -n -e 's/.*\(openwrt-toolchain.*\).tar.xz/\1/p')
-          TOOLCHAIN_SHA256=$(echo "$TOOLCHAIN_STRING" | cut -d ' ' -f 1)
-
-          echo "TOOLCHAIN_FILE=$TOOLCHAIN_FILE" >> "$GITHUB_ENV"
-          echo "TOOLCHAIN_SHA256=$TOOLCHAIN_SHA256" >> "$GITHUB_ENV"
-
-      - name: Cache external toolchain
-        id: cache-external-toolchain
-        uses: actions/cache@v3
-        with:
-          path: openwrt/${{ env.TOOLCHAIN_FILE }}
-          key: ${{ env.TOOLCHAIN_FILE }}-${{ env.TOOLCHAIN_SHA256 }}
-
-      - name: Download external toolchain
-        if: steps.cache-external-toolchain.outputs.cache-hit != 'true'
-        shell: su buildbot -c "sh -e {0}"
-        working-directory: openwrt
-        run: |
-          wget -O - https://downloads.cdn.openwrt.org/snapshots/targets/${{ env.TARGET }}/${{ env.SUBTARGET }}/${TOOLCHAIN_FILE}.tar.xz \
-            | tar --xz -xf -
-
-      - name: Extract prebuilt tools
-        shell: su buildbot -c "sh -e {0}"
-        working-directory: openwrt
-        run: ./scripts/ext-tools.sh --tools /tools.tar
-
-      - name: Create configuration
-        shell: su buildbot -c "sh -e {0}"
-        working-directory: openwrt
-        run: |
-          echo CONFIG_ALL=y >> .config
-          echo CONFIG_ALL_KMODS=y >> .config
-          echo CONFIG_ALL_NONSHARED=y >> .config
-          echo CONFIG_DEVEL=y >> .config
-          echo CONFIG_AUTOREMOVE=y >> .config
-
-          ./scripts/ext-toolchain.sh \
-            --toolchain ${{ env.TOOLCHAIN_FILE }}/toolchain-* \
-            --overwrite-config \
-            --config ${{ env.TARGET }}/${{ env.SUBTARGET }}
-
-      - name: Show configuration
-        shell: su buildbot -c "sh -e {0}"
-        working-directory: openwrt
-        run: ./scripts/diffconfig.sh
-
-      - name: Build tools
-        shell: su buildbot -c "sh -e {0}"
-        working-directory: openwrt
-        run: make tools/install -j$(nproc) BUILD_LOG=1 || ret=$? .github/workflows/scripts/show_build_failures.sh
-
-      - name: Build toolchain
-        shell: su buildbot -c "sh -e {0}"
-        working-directory: openwrt
-        run: make toolchain/install -j$(nproc) BUILD_LOG=1 || ret=$? .github/workflows/scripts/show_build_failures.sh
-
-      - name: Build Kernel
-        shell: su buildbot -c "sh -e {0}"
-        working-directory: openwrt
-        run: make target/compile -j$(nproc) BUILD_LOG=1 || ret=$? .github/workflows/scripts/show_build_failures.sh
-
-      - name: Build everything
-        shell: su buildbot -c "sh -e {0}"
-        working-directory: openwrt
-        run: make -j$(nproc) BUILD_LOG=1 || ret=$? .github/workflows/scripts/show_build_failures.sh
-
-      - name: Upload logs
-        if: failure()
-        uses: actions/upload-artifact@v3
-        with:
-          name: ${{ env.TARGET }}-${{ env.SUBTARGET }}-logs
-          path: "openwrt/logs"