common/libimage/manifests.list.Add(): add from lists without images #382
+48
−13
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When adding the contents of a list to another list, keep track of the MediaType that described the list elements, so that we can handle cases where the entry being referred to is unreadable.
When adding a non-list manifest to a list, default to reusing the MediaType of the non-list for its entry in the list to which it's being added.
If we can't read a manifest or configuration blob from an item that we're adding to a list, don't fail if we already have the information that we would try to read from the configuration blob.
Fixes containers/podman#27228.