List of not-covered topics

[jonringer]

Just need to write these down before I forget:

• [ ] Dev shells through nix
• [ ] wrapping
• [ ] overrides
• [ ] How to debug builds (nix develop .#)
• [ ] hardware acceleration (addOpenGLRunpath)
• [ ] Shell Hooks
• [ ] Common trivial builders
• [ ] patching
• [ ] pname + version vs name?
• [ ] meta?
• [ ] How contribute to nixpkgs
• [ ] flakes
• [ ] overlays
• [ ] Example build section?
  • [ ] go
  • [ ] cmake
  • [ ] gnumake (this is kind of already covered in the stdenv section)
  • [ ] autotools
  • [ ] rust
  • [ ] python

[nrdxp]

I have another one. Let attribute-sets let {}. Not sure if it needs to be covered though, as I think it's just the the syntatic desugaring of rec blocks, although a bit more explicit.

[jonringer]

Let attribute-sets

I'm not even familiar with this. But as an interesting aside, let blocks are implemented as a rec attr set.

[nrdxp]

I only found about them recently after getting to know the Nix tree-sitter grammar a bit. So for let {}, lets label the attribute-set x. It must contain a body key which is an arbitrary expression where all the other attributes defined in x are in scope. It is essentially another syntax for let in. And if body is an attribute-set itself, can be used as an alternative to rec. So:

let {
  x = 1;
  y = 2;
  body = x + y;
}

evals to 3.

[jonringer]

seems pretty advanced, in rust-lang book terms, I think that would be something which would go into the rust-nomicon instead "intro to nix" book :/

[jonringer]

Was thinking of moving back the build a package section and instead putting a how to use nixpkgs section. Then cover, the most common scenarios: using a flake, using nix develop, nix build, nix eval