racket: refactor and add features, 8.14 -> 8.15, mark Darwin as badPlatforms

[rc-zb]

1. Refactor racket and racket-minimal.

   • Reduce the closure size of racket-minimal by removing redundant dependencies. (fixing racket-minimal: closure size is too large #246902)
   • Unify pname to racket.
   • Clean code.

2. Add features to Racket derivations.

   • Add writeScript[Bin].
   • Add some package tests.
   • Add updateScript.

3. Update racket from 8.14 to 8.15 (alternative to racket: 8.14 -> 8.15 #360765, a trivial update on the version and hashes only).

4. Sadly, both this and racket: 8.14 -> 8.15 #360765 (and even the original recipe -- see Build failure: racket #372197) seem to fail to build on Darwin. I have to mark it as badPlatforms since I don't have a macOS device to test it.

5. Add myself to the their maintainer list, which was empty until now.

Limitations

• I guess it could be no more possible to extend the minimal distribution to a full one with raco pkg after installation, for lack of runtime dependencies. I don't know if this is part of the public interface of which all breaking changes must be documented.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[LiberalArtist]

I guess it could be no more possible to extend the minimal distribution to a full one with raco pkg after installation, for lack of runtime dependencies. I don't know if this is part of the public interface of which all breaking changes must be documented.

I haven't reviewed this PR in detail, but I wrote in #209660 (comment) about how we handle this in Guix.

[rc-zb]

I haven't reviewed this PR in detail, but I wrote in #209660 (comment) about how we handle this in Guix.

Thanks for directing me to the discussion. I do replace the LD_LIBRARY_PATH wrapper with config.rktd entries so that it finds the "necessary" foreign libraries cleanly. However, due to how Nix works and what it favors, it is neither very feasible nor expected that Racket just takes the library paths from the global environment. On the other hand, to facilitate things in a Nix shell, we can make use of the setup hook mechanism as Guile does. I decide to leave them to a further PR, where Racket packages would get built with Nix.

[pillowtrucker]

@rc-zb @SuperSandro2000 did this PR change the distribution of .boot files from standalone to embedded in executable? I can no longer build the rust racket-sys bindings due to those missing and I can't actually find them manually any more.
edit: Yes, .rackboot is embedded into the executable now. Was this intended? I'm guessing that they either made this the default in 8.15 or it's auto-enabled if it finds some optional dependency that it didn't have before..