dmd: merge into single file

[jtbx]

Description of changes

Merge the dmd package into a single file. The bootstrap package has also been merged into its own file.

Also add meta.changelog.

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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[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/prs-ready-for-review/3032/4059

[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/prs-ready-for-review/3032/4088

[CyberShadow]

Would there be any interest in bootstrapping DMD from source? I've implemented that in Digger.

[jtbx]

Sure I'd be up for that. Do you think we could use the existing LDC package to bootstrap it?

[CyberShadow]

Do you think we could use the existing LDC package to bootstrap it?

I haven't thought of that. Do you think LDC is simpler to bootstrap from source than DMD?

GDC would probably be easiest to bootstrap from source, as it was the longest running pure-C++ implementation of D.

[jtbx]

I haven't thought of that. Do you think LDC is simpler to bootstrap from source than DMD?

I thought LDC would be easier due to it not using DMD's D backend. But yes I agree GDC would probably be the best option here.

[jtbx]

Superseded by #324982