Changes

* Use tags for build-kit-<reponame>
* Don't support multi platform build

Signed-off-by: Andreas Heinrich <andreas.heinrich@rwth-aachen.de>

.github/workflows/continuous_integration.yml

@@ -258,11 +258,10 @@ jobs:
       - setup-env
     env:
       BUILD_KIT_IMAGE_NAME: local/build-kit-${{ github.event.repository.name }}
-      PLATFORMS: linux/amd64
       BUILD_ARGS: |
         BASE_IMAGE_TAG=${{ needs.setup-env.outputs.tag_everest_ci }}
     outputs:
-      build_kit_image_name: ${{ env.BUILD_KIT_IMAGE_NAME }}
+      build_kit_image_tag: ${{ steps.set-outputs.outputs.tag }}
     steps:
       - name: Checkout Dockerfile
         uses: actions/checkout@v4
@@ -272,29 +271,40 @@ jobs:
           ref: ${{ github.ref }}
           token: ${{ github.token}}
           fetch-depth: 0
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
+      - name: Docker Meta
+        id: meta
+        uses: docker/metadata-action@v5
         with:
-          image: tonistiigi/binfmt:latest
-          platforms: ${{ env.PLATFORMS }}
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+          images: ${{ env.BUILD_KIT_IMAGE_NAME }}
       - name: Build
         uses: docker/build-push-action@v6
         with:
           context: source/${{ inputs.build_kit_docker_directory }}
           push: false
-          platforms: ${{ env.PLATFORMS }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
           build-args: ${{ env.BUILD_ARGS }}
-          tags: ${{ env.BUILD_KIT_IMAGE_NAME }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
           outputs: type=docker,dest=build-kit.tar
       - name: Upload build-kit image
         uses: actions/upload-artifact@v4
         with:
           name: build-kit
           path: build-kit.tar
+      - name: Set output tag
+        id: set-outputs
+        shell: python3 {0}
+        run: |
+          import os
+          tags = "${{ steps.meta.outputs.tags }}".split(",")
+          if len(tags) == 0:
+            print("No tags found!❌")
+            exit(1)
+          tag = tags[0]
+          with open(os.environ["GITHUB_OUTPUT"], "a") as f:
+            f.write(f"tag={tag}\n")
+            print(f"Set tag={tag}")
 
   build:
     name: Build, Unit Tests and Install
@@ -303,7 +313,7 @@ jobs:
       - build-build-kit
     runs-on: ${{ inputs.runner }}
     env:
-      BUILD_KIT_IMAGE: ${{ needs.build-build-kit.outputs.build_kit_image_name }}
+      BUILD_KIT_IMAGE: ${{ needs.build-build-kit.outputs.build_kit_image_tag }}
     steps:
       - name: Checkout local github actions
         uses: actions/checkout@v3
@@ -438,7 +448,7 @@ jobs:
       - build
       - build-build-kit
     env:
-      BUILD_KIT_IMAGE: ${{ needs.build-build-kit.outputs.build_kit_image_name }}
+      BUILD_KIT_IMAGE: ${{ needs.build-build-kit.outputs.build_kit_image_tag }}
     runs-on: ${{ inputs.runner }}
     if: ${{ inputs.run_integration_tests == 'true' }}
     steps: