[Jenkins] Use old.stats.jenkins.io for JSON data

[froque]

Related with

• Replacing existing stats.jenkins.io code with https://github.com/jenkins-infra/stats.jenkins.io jenkins-infra/helpdesk#4265
• fix(utils.mjs) use the old stats.jenkins.io website (temporarily?) jenkins-infra/plugin-site#1890

[github-actions]

	Warnings
⚠️	This PR modified service code for jenkins but not its test code. That's okay so long as it's refactoring existing code.

	Messages
📖	✨ Thanks for your contribution to Shields, @froque!

Generated by 🚫 dangerJS against 77f66e9

[lemeurherveCB]

Note that this old.stats.jenkins.io website will be deprovisioned soon.

Ref:

• Replacing existing stats.jenkins.io code with https://github.com/jenkins-infra/stats.jenkins.io jenkins-infra/helpdesk#4265 (comment)

[chris48s]

Obviously I can see that
https://old.stats.jenkins.io/plugin-installation-trend/view-job-filters.stats.json serves some JSON
and
https://stats.jenkins.io/plugin-installation-trend/view-job-filters.stats.json
is a 404

but what's the long-term goal here?

Is the situation that the new https://stats.jenkins.io site still provides this data, but we need to account for some breaking changes? If so, lets do that.

If https://stats.jenkins.io just removes access to this data and old.stats.jenkins.io will only be around for a short time, lets sunset this following the deprecation process.

To me, it looks like the second one. While it does seem to be possible to initiate a download of JSON data via javascript in a browser, it seems to me like there is now no obvious or documented way to do this via a call to a predictable URL.

[lemeurherveCB]

As there are far more consumers than we initially though (https://github.com/search?q=stats.jenkins.io&type=code 😱), I'll open an issue on the new frontend project and/or Jenkins infra helpdesk to determine how/if we can continue to serve those files without breaking existing URLs. (No ETA yet, to be discussed first)

I'll keep you informed.

EDIT: proposed a potential solution (redirections) at jenkins-infra/helpdesk#4132 (comment)

[lemeurherveCB]

FWIW, the current data is still available at https://github.com/jenkins-infra/infra-statistics/tree/gh-pages/plugin-installation-trend. (Note: we'll change the branch from gh-pages to data soon.)

[lemeurherveCB]

Sorry for the inconvenience, I'm at fault here I should have searched for external consumers earlier.

[chris48s]

OK. Thanks. For the moment I am going to merge this as a stop-gap but I'll make an issue for the follow up