gemini-code-assist[bot] commented on PR #36547:
URL: https://github.com/apache/beam/pull/36547#issuecomment-3412220710
## Summary of Changes
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pull request and will post my feedback shortly. In the meantime, here's a
summary to help you and other reviewers quickly get up to speed!
This pull request addresses and resolves flakiness in the `PostCommit Python
ValidatesContainer Dataflow` CI job. The core issue stemmed from an unreliable
image cleanup process that could either delete incorrect images or fail due to
malformed image digests. The changes introduce more robust filtering to target
only relevant images, validate image digests for correctness, and implement
better error handling to skip deletions when digests are invalid, significantly
improving the stability and reliability of the container validation pipeline.
### Highlights
* **Enhanced Image Filtering**: The cleanup script now uses a more precise
`grep` pattern to ensure only Docker images relevant to the current run are
targeted for deletion, preventing accidental removal of unrelated images.
* **Robust Digest Validation**: Introduced validation for image digests,
checking if they are non-empty and conform to the `sha256:[a-f0-9]{64}` format
before attempting deletion from Google Cloud Container Registry.
* **Improved Error Handling**: The script now gracefully skips the deletion
of images when their digests are invalid or empty, reducing potential failures
in the cleanup process.
* **Debugging Capabilities**: Added explicit logging statements to provide
better visibility into the image cleanup process, including digest lookup
results and reasons for skipping deletions, aiding in future troubleshooting.
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