o-nikolas commented on PR #46621:
URL: https://github.com/apache/airflow/pull/46621#issuecomment-3074540257

   > Hi all,
   > 
   > Would it be a good idea to introduce a `RemoteDagBundle` interface (or 
perhaps extend `BaseDagBundle` or add a common utility in the `bundles.base` 
module) to support **versioning** for remote Dag bundles like `S3DagBundle`?
   > 
   > We could support bundle versioning using one of the following approaches 
(potentially controlled by an `enable_versioning` parameter in 
`RemoteDagBundle`):
   > 
   >     1. **Content-based hash**: Calculate a hash of the bundle by hashing 
each Dags file and incorporating the directory structure, then return a final 
hash value as the version.
   > 
   >     2. **Timestamp-based version**: Use the last modified timestamp of the 
bundle. Most cloud providers support a `LastModified` or `updated` metadata 
field that we can leverage.
   > 
   > 
   > If this sounds reasonable, I will open a new issue to track this feature 
and raise PR for it.
   
   CC @jedcunningham 
   
   I was talking to Jed about something very similar last week. I don't even 
think the interface needs to enforce the "how" for the versioning, that can be 
delegated to each Bundle provider. But I agree that the interface should 
support this, especially from the persistence side of things. IMHO the 
interface should expect a string payload back from the bundle provider which is 
the representation of the dag bundle version (which can be whatever mechanism 
the provider wants/can use to serialize the state of the dags at that time). 
I'd also vote that the interface creates the version id for that, otherwise 
each provider will create their own semantics and shape of the id which is 
going to create inconsistency. 


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