[llvm] workflows/build-ci-container: Add an arm64 container (PR #120828)

[Aiden Grossman via llvm-commits]

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@@ -75,13 +80,29 @@ jobs:
     steps:
       - name: Download container
         uses: actions/download-artifact at v4
-        with:
-          name: container
 
       - name: Push Container
         run: |
-          podman load -i ${{ needs.build-ci-container.outputs.container-filename }}
-          podman tag ${{ needs.build-ci-container.outputs.container-name-tag }} ${{ needs.build-ci-container.outputs.container-name }}:latest
+          function push_container {
+            image_name=$1
+            latest_name=$(echo $image_name | sed 's/:[.0-9]\+$/:latest/g')
+            podman tag $image_name $latest_name
+            echo "Pushing $image_name ..."
+            podman push $image_name
+            echo "Pushing $latest_name ..."
+            podman push $latest_name
+          }
+
           podman login -u ${{ github.actor }} -p $GITHUB_TOKEN ghcr.io
-          podman push ${{ needs.build-ci-container.outputs.container-name-tag }}
-          podman push ${{ needs.build-ci-container.outputs.container-name }}:latest
+          for f in $(find . -iname *.tar); do
+            image_name=$(podman load -q -i $f | sed 's/Loaded image: //g')
+            push_container $image_name
+
+            if echo $image_name | grep '/amd64/'; then
+              # For amd64, create an alias with the arch component removed.
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boomanaiden154 wrote:

Do we need to add an alias? It shouldn't be too difficult to switch things over to use the new naming, and I would personally prefer the consistency.

https://github.com/llvm/llvm-project/pull/120828