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  • I have added unit tests if possible.
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Summary of Changes

Hello @chrislusf, I'm Gemini Code Assist1! I'm currently reviewing this 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 primarily addresses a bug in the S3 ListObjectVersions API concerning how prefixes are handled during object listing. The changes refine the internal logic for filtering objects based on a given prefix, ensuring that only truly matching objects and relevant directories are considered, thereby preventing incorrect inclusions in the version list. A new test case has been added to validate the fix for various edge scenarios.

Highlights

  • Corrected Prefix Filtering: The core logic for the S3 ListObjectVersions API has been updated to accurately filter objects based on the provided prefix, resolving issues where non-matching objects might have been incorrectly included in the results.
  • Enhanced Recursive Traversal: The findVersionsRecursively function now includes more robust checks to determine if an object or directory should be considered when applying a prefix filter. This specifically addresses edge cases involving partial matches or complex directory structures, ensuring precise matching and correct traversal.
  • New Test Case for Edge Cases: A dedicated test (TestPrefixFilteringLogic) has been added to thoroughly validate the corrected prefix filtering behavior. This test covers specific scenarios, such as distinguishing between keys like 'a' and 'a/b' when a prefix like 'a/b' or 'a/' is applied, ensuring the fix works as intended.
  • Preservation of Original Prefix in Response: The ListObjectVersions API now ensures that the Prefix field in the response accurately reflects the original prefix provided by the user in the request, rather than an internally normalized version used for processing.
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Code Review

This pull request fixes a bug in the versioning list logic where prefixes could lead to incorrect results. The fix in findVersionsRecursively is correct and is well-supported by the new integration test TestPrefixFilteringLogic. I've added suggestions to improve code readability and reduce redundancy.

Comment on lines +734 to +735
originalPrefix := query.Get("prefix") // Keep original prefix for response
prefix := originalPrefix // Use for internal processing
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medium

It's redundant to assign originalPrefix to prefix on the next line. You can directly use originalPrefix for internal processing to avoid this extra assignment.

Suggested change
originalPrefix := query.Get("prefix") // Keep original prefix for response
prefix := originalPrefix // Use for internal processing
prefix := originalPrefix // Use for internal processing

chrislusf and others added 2 commits July 21, 2025 10:29
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
@chrislusf chrislusf marked this pull request as ready for review July 21, 2025 17:33
@chrislusf chrislusf merged commit 3a5ee18 into master Jul 21, 2025
22 checks passed
@chrislusf chrislusf deleted the fix-versioning-list-only branch July 21, 2025 17:35
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