Add script to update the Debian base image

[Camila-B]

This is a first step towards automating image updates

[google-oss-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please ask for approval from camila-b. For more information see the Kubernetes Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[gemini-code-assist]

Summary of Changes

Hello @Camila-B, 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 introduces a new automation script and integrates it into the Makefile to streamline the process of updating the Debian base image. This change is a foundational step towards achieving more comprehensive automation for image updates, reducing manual effort and ensuring the use of the latest stable base images.

Highlights

• New Automation Script: Introduced scripts/update-debian-base-image.sh to automate the process of finding and updating the latest Debian base image tag (bookworm) in the Makefile.
• Makefile Integration: Added a new make update-debian-base-image target to the Makefile, which executes the new automation script, simplifying the update process.
• Improved Documentation: Updated the Makefile comments to guide users to the new make target for updating the Debian base image.

🧠 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.

Changelog

• Makefile
  • Added a new update-debian-base-image target that executes the scripts/update-debian-base-image.sh script.
  • Included a comment guiding users to the new make target for updating the Debian base image.
• scripts/update-debian-base-image.sh
  • New file added, containing a bash script that fetches the latest bookworm tag for gcr.io/gke-release/debian-base using gcloud.
  • The script compares the latest tag with the current tag in the Makefile and updates the DEBIAN_BASE_IMAGE variable if a newer version is found.

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 introduces a script and a corresponding Makefile target to automate updating the Debian base image version. The script correctly identifies the latest tag and updates the Makefile. I've added a couple of suggestions to improve the script's robustness and adherence to shell scripting best practices.