basic autoformat in helix

flake.lock

@@ -1,5 +1,28 @@
 {
   "nodes": {
+    "alejandra": {
+      "inputs": {
+        "fenix": "fenix",
+        "flakeCompat": "flakeCompat",
+        "nixpkgs": [
+          "nixpkgs-nixos-unstable"
+        ]
+      },
+      "locked": {
+        "lastModified": 1668317688,
+        "narHash": "sha256-wC04cwcKyV2TUYXqMibFWkq7WOMIXHw5DrfAJrWHzgI=",
+        "owner": "kamadorueda",
+        "repo": "alejandra",
+        "rev": "378cde949be70caea431682756b36552a58e965d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "kamadorueda",
+        "ref": "main",
+        "repo": "alejandra",
+        "type": "github"
+      }
+    },
     "crane": {
       "flake": false,
       "locked": {
@@ -113,6 +136,28 @@
         "type": "github"
       }
     },
+    "fenix": {
+      "inputs": {
+        "nixpkgs": [
+          "alejandra",
+          "nixpkgs"
+        ],
+        "rust-analyzer-src": "rust-analyzer-src"
+      },
+      "locked": {
+        "lastModified": 1668234453,
+        "narHash": "sha256-FmuZThToBvRsqCauYJ3l8HJoGLAY5cMULeYEKIaGrRw=",
+        "owner": "nix-community",
+        "repo": "fenix",
+        "rev": "8f219f6b36e8d0d56afa7f67e6e3df63ef013cdb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "fenix",
+        "type": "github"
+      }
+    },
     "flake-compat": {
       "flake": false,
       "locked": {
@@ -160,6 +205,22 @@
         "type": "github"
       }
     },
+    "flakeCompat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1650374568,
+        "narHash": "sha256-Z+s0J8/r907g149rllvwhb4pKi8Wam5ij0st8PwAh+E=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "b4a34015c698c7793d592d66adbab377907a2be8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
     "helix": {
       "inputs": {
         "nci": "nci",
@@ -339,6 +400,7 @@
     },
     "root": {
       "inputs": {
+        "alejandra": "alejandra",
         "darwin": "darwin",
         "flake-compat": "flake-compat",
         "flake-utils": "flake-utils",
@@ -353,6 +415,23 @@
         "sops": "sops"
       }
     },
+    "rust-analyzer-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1668182250,
+        "narHash": "sha256-PYGaOCiFvnJdVz+ZCaKF8geGdffXjJUNcMwaBHv0FT4=",
+        "owner": "rust-lang",
+        "repo": "rust-analyzer",
+        "rev": "45ec315e01dc8dd1146dfeb65f0ef6e5c2efed78",
+        "type": "github"
+      },
+      "original": {
+        "owner": "rust-lang",
+        "ref": "nightly",
+        "repo": "rust-analyzer",
+        "type": "github"
+      }
+    },
     "rust-overlay": {
       "inputs": {
         "flake-utils": "flake-utils_2",

flake.nix

@@ -2,7 +2,7 @@
   description = "NixOS configuration with flakes";
   outputs = { self, flake-utils, flake-compat, home-manager
     , nixpkgs-nixos-unstable, nixpkgs-master, nixpkgs-stable, darwin
-    , nixos-hardware, nur, sops, nil, helix }@inputs:
+    , nixos-hardware, nur, sops, nil, helix, alejandra }@inputs:
 
     let
       mkServer = pkgs: system: hostname:
@@ -262,7 +262,13 @@
       inputs.nixpkgs.follows = "nixpkgs-stable";
       inputs.nixpkgs-stable.follows = "nixpkgs-stable";
     };
-
+alejandra = {
+      type = "github";
+      owner = "kamadorueda";
+      repo = "alejandra";
+      ref = "main";
+      inputs.nixpkgs.follows = "nixpkgs-nixos-unstable";
+    };
     flake-compat = {
       url = "github:edolstra/flake-compat";
       flake = false;

nixos/home-manager/programs/helix.nix

@@ -1,14 +1,33 @@
-{ config, pkgs, lib, inputs, system, ... }: {
+{
+  config,
+  pkgs,
+  lib,
+  inputs,
+  system,
+  ...
+}: let
+  alejandra = lib.getExe inputs.alejandra.packages.${system}.default;
+  nil = lib.getExe inputs.nil.packages.${system}.default;
+in {
   programs.helix = {
     enable = true;
     package = inputs.helix.packages."${system}".helix;
-    settings = { theme = "solarized_dark"; };
-    languages = [{
-      name = "nix";
-      auto-format = true;
-      language-server = {
-        command = "${inputs.nil.packages.${system}.default}/bin/nil";
+    settings = {
+      keys.normal = {
+        C-p = "file_picker";
+        C-b = "buffer_picker";
       };
-    }];
+    };
+    languages = [
+      {
+        name = "nix";
+        auto-format = true;
+        language-server = {command = nil;};
+        formatter = {
+          command = alejandra;
+          args = ["-q"];
+        };
+      }
+    ];
   };
 }