Nixpkgs: Update list of available packages

[FRidh]

Issue description

In #27220 the tool https://repology.org/ was mentioned which scans repositories, records what versions of packages we have, and checks certain meta data. The tool works by using the files

• https://nixos.org/nixpkgs/packages-unstable.json.gz
• https://nixos.org/nixpkgs/packages.json.gz

which are generated by this script as part of the NixOS website.

Maybe the files could be generated as part of the channel update mechanism?

• http://nixos.org/channels/nixos-unstable
• https://github.com/NixOS/nixos-channel-scripts

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Note that I posted this here because the issue spans over multiple repositories.

[vcunat]

packages-unstable.json was on a two months old commit yesterday (c5badb123a2).

[0xABAB]

https://repology.org/statistics kind of shows how badly all distributions do their work, assuming the tool works at all.

[vcunat]

Repology picked up the changes already :tada:

[AMDmi3]

It seems that the update is broken again. https://nixos.org/nixpkgs/packages-unstable.json.gz is at https://github.com/NixOS/nixpkgs/commit/96457d26dded05bcba8e9fbb9bf0255596654aab dated 11 days ago.

[vcunat]

Well, that's "just" because (some of) our packages have been broken the whole 11 days.