[linsword13]

For newer releases of google-auth lib, it attempts to connect using mTLS when it can find the certs in well-known locations. This causes our fetcher to fail with cert error. The mTLS change was introduced by googleapis/google-auth-library-python#1856.

We probably need to upstream this to Spack as well.

[gemini-code-assist]

Summary of Changes

Hello, 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 implements a critical workaround to address certificate errors that occur when the google-auth library, in its newer versions, attempts to establish mTLS connections to the GCE metadata server on Google Cloud Platform virtual machines. By explicitly disabling mTLS for this specific interaction, the change ensures smooth authentication and prevents connection failures caused by the library's updated behavior.

Highlights

• GCE mTLS Workaround: Disabled GCE mTLS for the metadata server by setting the GCE_METADATA_MTLS_MODE environment variable to "none". This resolves certificate errors encountered with newer google-auth library versions on certain GCP VMs, which attempt mTLS connections when certificates are found in well-known locations.

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.

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 introduces a workaround for google-auth mTLS certificate errors on GCP VMs by setting the GCE_METADATA_MTLS_MODE environment variable to "none". A review comment suggests condensing the explanatory comment for improved readability.