fix: remove mandatory attrs response in MRD

[krishnamd-jkp]

This removes mandatory check on metadata in the response from the server. Creation of multiple MRDs will not work if mandatory check is present. If read handle is provided, the server might not return metadata, so removing the mandatory check

[gemini-code-assist]

Summary of Changes

Hello @krishnamd-jkp, 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 streamlines the multi-range downloader (MRD) by removing the explicit handling and conversion of negative offsets, which previously relied on object attributes. The convertToPositiveOffset function and its invocations have been eliminated, simplifying the request processing logic within handleAddCmd and processSessionResult. This change suggests a refactoring where negative offsets are either no longer supported in this component or are expected to be resolved before reaching this stage, thereby removing a mandatory dependency on attribute responses for this specific operation.

Highlights

• Removed Negative Offset Conversion Logic: The convertToPositiveOffset function and all its calls have been entirely removed, simplifying the multi-range download request processing.
• Eliminated Attribute Dependency for Offset Handling: The system no longer attempts to convert negative offsets using object attributes (m.attrs.Size) within the handleAddCmd and processSessionResult methods.
• Streamlined Session Result Processing: The logic for handling the first session result has been simplified by removing the conditional conversion of pending ranges and an error check for missing metadata.

🧠 New Feature in Public Preview: You can now enable Memory to help Gemini Code Assist learn from your team's feedback. This makes future code reviews more consistent and personalized to your project's style. Click here to enable Memory in your admin console.

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point by creating a comment using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands on the current page.

Feature	Command	Description
Code Review	/gemini review	Performs a code review for the current pull request in its current state.
Pull Request Summary	/gemini summary	Provides a summary of the current pull request in its current state.
Comment	@gemini-code-assist	Responds in comments when explicitly tagged, both in pull request comments and review comments.
Help	/gemini help	Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments. If you're interested in giving your feedback about your experience with Gemini Code Assist for Github and other Google products, sign up here.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩

[gemini-code-assist]

Code Review

This pull request refactors the multi-range downloader by removing the client-side logic for handling negative offsets and making the object attributes in the initial server response optional. The convertToPositiveOffset function and its usages have been removed, simplifying the client by delegating negative offset resolution to the server. Additionally, the code no longer errors if the first response from the stream does not contain object metadata. The changes appear to be self-contained and correctly implemented to reflect a change in the client-server protocol.

[tritone]

Thanks for your work on this, a couple thoughts...

1. We should add an integration test for this case (creating MRD using a read handle).
2. We should get persisted size in the first response even with the read handle correct? In that case I would expect us to be able to convert to positive offset using that.
3. Are there deadlocks as a result of waiting on the attrs in NewMultiRangeDownloader?

Can discuss all this via chat and/or when we meet.