Make nix-spoc builds a matrix

Signed-off-by: Sascha Grunert <[email protected]>

Author: saschagrunert

.github/workflows/build.yml

@@ -53,7 +53,37 @@ jobs:
           path: build/${{ matrix.arch }}
 
   nix-spoc:
+    strategy:
+      fail-fast: false
+      matrix:
+        arch:
+          - amd64
+          - arm64
+          - ppc64le
+    runs-on: ubuntu-22.04
+    name: nix / spoc / ${{ matrix.arch }}
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: cachix/install-nix-action@3715ab1a11cac9e991980d7b4a28d80c7ebdd8f9 # v28
+        with:
+          install_url: https://releases.nixos.org/nix/nix-${{ env.NIX_VERSION }}/install
+      - uses: cachix/cachix-action@ad2ddac53f961de1989924296a1f236fcfbaa4fc # v15
+        with:
+          name: security-profiles-operator
+          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+          pushFilter: security-profiles-operator
+      - run: nix-build nix/default-${{ matrix.arch }}.nix
+
+  nix-spoc-push:
+    strategy:
+      fail-fast: false
+      matrix:
+        arch:
+          - amd64
+          - arm64
+          - ppc64le
     if: github.ref == 'refs/heads/main' || contains(github.ref, 'refs/tags')
+    name: nix / spoc / push / ${{ matrix.arch }}
     runs-on: ubuntu-22.04
     permissions:
       contents: write  # required for updating the release
@@ -73,10 +103,10 @@ jobs:
           sudo curl -sSfL --retry 5 --retry-delay 3 -o /usr/bin/bom \
             https://github.com/kubernetes-sigs/bom/releases/download/${{ env.BOM_VERSION }}/bom-amd64-linux
           sudo chmod +x /usr/bin/bom
-      - run: make nix-spoc
+      - run: make nix-spoc-${{ matrix.arch }}
       - uses: actions/upload-artifact@6f51ac03b9356f520e9adb1b1b7802705f340c2b # v4.5.0
         with:
-          name: spoc
+          name: spoc-${{ matrix.arch }}
           path: |
             build/*
       - uses: softprops/action-gh-release@7b4da11513bf3f43f9999e90eabced41ab8bb048 # v2.2.0