Hi Chris, Since blog post about Data Services seems floating around, I describe what I find useful as an end-user of the service. And if you have not showed me IRL at FOSDEM (and you showed me several times ;-)), then I would not be using the service so often.
To me, the entry point is always: <https://data.guix.gnu.org/repository/1/branch/master/package/PACKAGE> and to be exact <https://data.guix.gnu.org/…/PACKAGE/output-history>. Even, I have this Emacs trivial helper function: --8<---------------cut here---------------start------------->8--- (defun my/guix-data (package) "Add URL of PACKAGE to `kill-ring'. Yankable result: `https://data.guix.gnu.org/repository/1/branch/master/package/PACKAGE/output-history'. With `universal-argument', load URL using `browse-url'." (interactive "sPackage: ") (let ((url (format "https://data.guix.gnu.org/repository/1/branch/master/package/%s/output-history"; package))) (kill-new url) (when current-prefix-arg (browse-url url)) (message (format "%s killed." url)))) --8<---------------cut here---------------end--------------->8--- (This dumb function could be improved using “guix-emacs” with package completion etc. But the time to implement such thing is not worth for me because I generally exactly know which package I look up. :-)) Let’s take the recent example of the package ’python-umap-learn’ [1]. >From the webpage, it is quick and easy to see which version build or fail. Then, once I know that: Version Output Builds From To “From” means the date of the first commit corresponding to Version –– specifically at the derivation. And “To” resp. the last commit. Then I can click to say the “To” date of the last “Succeeded” build and it leads to the webpage: <https://data.guix.gnu.org/revision/cac674d99dc4a332e6210c57ec7f1b8164f66642> which provides the commit hash. Now, it is easy to use the time-machine: guix time-machine –commit=cac674d99dc4a332e6210c57ec7f1b8164f66642 \ – install python-umap-learn Time to time, I click to “Failed Dependency” but I do not know how this information is accurate. Well, I could describe other use cases, but I think this one is really useful for the end-user: - list all the versions available (since Dec. 2019 I guess) - know which build and which not - easily find the commit for “guix time-machine” Cheers, simon 1: <https://lists.gnu.org/archive/html/help-guix/2020-09/msg00140.html>