forked from dan/liminix
33 lines
1.3 KiB
Markdown
33 lines
1.3 KiB
Markdown
# Some notes on Nix language style
|
|
|
|
In an attempt to keep this more consistent than NixWRT ended up being,
|
|
here is a Nix language style guide for this repo.
|
|
|
|
* favour `callPackage` over raw `import` for calling derivations
|
|
or any function that may generate one - any code that might need
|
|
`pkgs` or parts of it.
|
|
|
|
* prefer `let inherit (quark) up down strange charm` over `with
|
|
quark`, in any context where the scope is more than a single
|
|
expression or there is more than one reference to `up`, `down` etc.
|
|
`with pkgs; [ foo bar baz]` is OK,
|
|
`with lib; stdenv.mkDerivation { ... } ` is usually not.
|
|
|
|
* <liminix> is defined only when running tests, so don't refer to it in
|
|
"application" code
|
|
|
|
* the parameters to a derivation are sorted alphabetically, except for
|
|
`lib`, `stdenv` and maybe other non-package "special cases"
|
|
|
|
* indentation is whatever emacs nix-mode says it is.
|
|
|
|
* where a `let` form defines multiple names, put a newline after the
|
|
token `let`, and indent each name two characters
|
|
|
|
* should it be a package or a module? packages are self-contained -
|
|
they live in /nix/store/eeeeeee-name and don't directly change
|
|
system behaviour by their presence or absense. modules can add to
|
|
/etc or /bin or other global state, create services, all that
|
|
side-effecty stuff. generally it should be a package unless it
|
|
can't be.
|