[signer] Check ability to assemble an iPXE ISO image

Signed-off-by: Michael Brown <mbrown@fensystems.co.uk>

Author: mcb30

.github/workflows/signer.yml

@@ -39,4 +39,23 @@ jobs:
           push: true
           tags: |
             ${{ env.reponame }}/${{ env.pkgname }}:draft-${{ github.sha }}
-            ${{ env.reponame }}/${{ env.pkgname }}:${{ env.label }}
+
+      - name: Build (checker)
+        uses: docker/build-push-action@v6
+        with:
+          context: signer
+          target: check-signer
+          push: false
+          load: true
+          tags: |
+            check-signer
+
+      - name: Test
+        run: |
+          docker run --rm check-signer
+
+      - name: Publish
+        run: |
+          docker buildx imagetools create \
+            --tag ${{ env.reponame }}/${{ env.pkgname }}:${{ env.label }} \
+            ${{ env.reponame }}/${{ env.pkgname }}:draft-${{ github.sha }}

signer/Dockerfile

@@ -15,6 +15,22 @@ RUN dnf update -y \
 	syslinux \
     && dnf clean all -y
 
+FROM signer AS check-signer
+
+RUN dnf install -y \
+	libcdio \
+	shim-x64 \
+    && dnf clean all -y
+
+RUN ln -s /bin/true dummy.lkrn
+
+RUN ln -s /boot/efi/EFI/BOOT/BOOTX64.EFI dummy.efi
+
+ADD https://github.com/ipxe/ipxe.git /ipxe
+
+CMD /ipxe/src/util/genfsimg -o dummy.iso dummy.lkrn dummy.efi && \
+    iso-info dummy.iso
+
 #
 # Specify the default target
 #