make src image multi-arch; remove NGC logic

Signed-off-by: Mitchell <mitch_dz@hotmail.com>

Author: mitchdz

.github/workflows/build_package_sources.yml

@@ -24,14 +24,6 @@
 on:
   workflow_dispatch:
     inputs:
-      push_to_NGC:
-        required: false
-        type: boolean
-        default: false
-        description: 'Push the built source image to NGC, otherwise push to GHCR.'
-      environment:
-        required: false
-        type: string
       artifact_url:
         required: false
         type: string
@@ -378,39 +370,43 @@ jobs:
           push: false
 
       - name: Log in to GitHub CR
-        if: github.event.inputs.push_to_NGC != 'true'
         uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ github.token }}
 
-      - name: Log in to NGC
-        if: github.event.inputs.push_to_NGC == 'true'
-        uses: docker/login-action@v3
-        with:
-          registry: nvcr.io
-          username: '$oauthtoken'
-          password: ${{ secrets.NGC_CREDENTIALS }}
-
-      - name: Tag and push to GHCR or NGC
+      - name: Tag and push amd64 image
         id: push
         run: |
           docker load --input /tmp/package-sources.tar
           cuda_major=$(echo "${{ matrix.cuda }}" | cut -d. -f1)
           target_image="nvcr.io/nvidia/nightly/cuda-quantum:cu${cuda_major}-latest"
           tag_suffix="${target_image##*:}"
-          if [ "${{ github.event.inputs.push_to_NGC }}" = "true" ]; then
-            # Derive push destination from target_image: .../cuda-quantum:tag -> .../cuda-quantum-src:tag
-            repo_part="${target_image%:*}"
-            tag="${repo_part}-src:${tag_suffix}"
-          else
-            owner_lower=$(echo "${{ github.repository_owner }}" | tr '[:upper:]' '[:lower:]')
-            tag="ghcr.io/${owner_lower}/cuda-quantum-src:${tag_suffix}"
-          fi
-          docker tag package-sources:latest "$tag"
-          docker push "$tag"
+          owner_lower=$(echo "${{ github.repository_owner }}" | tr '[:upper:]' '[:lower:]')
+          tag="ghcr.io/${owner_lower}/cuda-quantum-src:${tag_suffix}"
+          tag_amd64="${tag}-amd64"
+          docker tag package-sources:latest "$tag_amd64"
+          docker push "$tag_amd64"
           echo "image_tag=$tag" | tee -a $GITHUB_OUTPUT
+          echo "tag_amd64=$tag_amd64" | tee -a $GITHUB_OUTPUT
+
+      - name: Create arm64 manifest from amd64 (same contents)
+        run: |
+          tag="${{ steps.push.outputs.image_tag }}"
+          tag_amd64="${{ steps.push.outputs.tag_amd64 }}"
+          tag_arm64="${tag}-arm64"
+          docker run --rm \
+            -v $HOME/.docker/config.json:/root/.docker/config.json:ro \
+            gcr.io/go-containerregistry/crane:latest \
+            copy --platform=linux/arm64 "$tag_amd64" "$tag_arm64"
+
+      - name: Create and push multi-arch manifest
+        run: |
+          tag="${{ steps.push.outputs.image_tag }}"
+          tag_amd64="${{ steps.push.outputs.tag_amd64 }}"
+          tag_arm64="${tag}-arm64"
+          docker buildx imagetools create --tag "$tag" "$tag_amd64" "$tag_arm64" --push
 
       - name: Summary
         run: |