rustlings: init at 6.2.0

[luftmensch-luftmensch]

Description of changes

Closes #334595

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/)
• 24.11 Release Notes (or backporting 23.11 and 24.05 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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[aos]

Hmm... looks like rustlings needs cargo (and rust obviously). Should that be included as part of this package?

[nix-shell:~/.cache/nixpkgs-review/pr-334610-1]$ rustlings init
Error: Initialization failed

Caused by:
    0: Failed to run the command `cargo locate-project …`
       Did you already install Rust?
       Try running `cargo --version` to diagnose the problem.
    1: No such file or directory (os error 2)

[luftmensch-luftmensch]

@aos Made some changes to make package work properly

[luftmensch-luftmensch]

@Atemu Moved all buildInputs into postFixup phase using --suffix flag

[Atemu]

Diff LGTM.

I don't know how I would test this. Could you explain a little what QA you have done? I want to be reasonably sure that this actually works as expected.

[luftmensch-luftmensch]

Following these steps:

1. rustlings init
2. cd rustlings
3. rustlings (interactive tutorials)

[Atemu]

And I assume the tutorials work as expected?

[Pandapip1]

Result of nixpkgs-review pr 334610 run on x86_64-linux 1

1 package built:

• rustlings

[Pandapip1]

Basic functionality tested; works.