73 lines
1.6 KiB
Markdown
73 lines
1.6 KiB
Markdown
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---
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title: Quick reproducible zig dev env using nix flakes
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date: 2022-01-01
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tags: [zig, nix]
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---
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Want this great feeling of entering a directory and having all your dev setup done but can never remember how to set up nix flakes ?
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What you'll need is, in addition to a working [direnv](https://direnv.net/) with `nix` and `nix flake` enabled, is:
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`.envrc`:
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```text
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use flake
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```
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`.gitignore`:
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```text
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.direnv/
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```
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`flake.nix` (this `nixpkgs` hash points to the first revision with zig 0.9 present):
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```nix
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{
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inputs = {
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nixpkgs = {
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type = "github";
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owner = "nixos";
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repo = "nixpkgs";
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ref = "e1eeb53e64159fbb2610ba7810ed511e4d5c10ca";
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};
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flake-compat = {
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url = "github:edolstra/flake-compat";
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flake = false;
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};
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};
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outputs = { self, nixpkgs, flake-compat }:
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let pkgs = nixpkgs.legacyPackages.x86_64-linux;
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in
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{
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devShell.x86_64-linux =
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pkgs.mkShell {
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buildInputs = with pkgs;[
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nixpkgs-fmt
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zig
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zls
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];
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};
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};
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}
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```
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and some `shell.nix` for this extra bit of `nix-shell` compatibility, if you'd want it:
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```nix
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(import
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(
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let
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lock = builtins.fromJSON (builtins.readFile ./flake.lock);
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in
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fetchTarball {
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url = "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
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sha256 = lock.nodes.flake-compat.locked.narHash;
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}
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)
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{
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src = ./.;
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}).shellNix
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```
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Don't forget to:
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* `git add` all of the above, otherwise nix flake operations might not work
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* `direnv allow` this directory
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* have fun !
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