This adds a new function which can be used as the passthru.updateScript of many simple ruby packages. It also puts that function to use in every "simple" ruby package I could find.

Though I tried to keep the changes I made minimal, I thought it would be polite to list myself as a maintainer of each package I touched.

Motivation for this change

I was working on a PR for updating fastlane (#63543), a ruby package which I use and which has frequent releases. I wrote an updateScript for it, then realized it was generalizable. I've also been hoping for semi-automated package updates in more parts of nixpkgs for a while.

Things done

I've run the scripts successfully, using nix-shell maintainers/scripts/update.nix --argstr maintainer nicknovitski

For some reason nix-review fails on attempting to evaluate the new function. I don't fully understand that.

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nix-review --run "nix-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.