badges/shields

Badge request: Newest dockerhub image

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#6016 opened on Jan 5, 2021

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good first issueservice-badge

Description

:clipboard: Description

This badge would work similarly to the docker version badge. Instead of showing the latest tag by date, it would show the latest date of the newest tag. This shows that a docker image is up to date.

:link: Data

The docker version badge already makes use of the date of images. I was thinking about creating a PR myself, but the docker version service looked a bit intimidating so far. As far as I can tell, the same API should also provide the newest date.

:microphone: Motivation

Docker hub builds images according to GitHub sources. But there's no way of knowing if a Docker image is actually maintained by looking at the git repo. It should be possible to see at a glance: How old is this image? Is the underlying ubuntu/alpine/debian up to date or is it ancient? Does it make sense to build the image on my own, or can I use this one and trust that it has recent software in it?

You don't have to push code to a git repo to build an image on Docker Hub. In fact, I don't change my repos much but I trigger rebuilds all the time. Someone who looks at a git repo without a commit in 2y might think that its image is outdated but it might be really new.

Contributor guide

Tech stack
javascriptnodejsdocker
Domain
devopsdeveloper experience
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Understand existing Docker version badge implementationKnowledge of Shields badge service structure
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50
Research direction
Review the existing Docker version badge implementation in the Shields codebase (likely in services/docker/) to understand how date information is fetched and displayed. Investigate the Docker Hub API to confirm it can provide the creation date of the newest tag. Consider whether the new badge should show the date of the most recently updated tag or the newest tag by version. Check the issue comments for any additional context or constraints.