Various flake improvements

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -1,2 +1,2 @@
 /target
-Cargo.lock
+/.direnv

flake.lock

@@ -1,8 +1,31 @@
 {
   "nodes": {
+    "fenix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "rust-analyzer-src": "rust-analyzer-src"
+      },
+      "locked": {
+        "lastModified": 1662533965,
+        "narHash": "sha256-56td0N02VeIOuzyesNWLCwTcoVwP0wuQauUbzh6RpMg=",
+        "owner": "nix-community",
+        "repo": "fenix",
+        "rev": "b5b70debeb3c2f93186eaed7de13674b9783b9d2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "fenix",
+        "type": "github"
+      }
+    },
     "naersk": {
       "inputs": {
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": [
+          "nixpkgs"
+        ]
       },
       "locked": {
         "lastModified": 1662220400,
@@ -19,20 +42,6 @@
       }
     },
     "nixpkgs": {
-      "locked": {
-        "lastModified": 1662096612,
-        "narHash": "sha256-R+Q8l5JuyJryRPdiIaYpO5O3A55rT+/pItBrKcy7LM4=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "21de2b973f9fee595a7a1ac4693efff791245c34",
-        "type": "github"
-      },
-      "original": {
-        "id": "nixpkgs",
-        "type": "indirect"
-      }
-    },
-    "nixpkgs_2": {
       "locked": {
         "lastModified": 1662410893,
         "narHash": "sha256-jmZjdA/n92OpUdaEjU7QJNsa1np+u+JWDj300x3K3XY=",
@@ -49,11 +58,29 @@
     },
     "root": {
       "inputs": {
+        "fenix": "fenix",
         "naersk": "naersk",
-        "nixpkgs": "nixpkgs_2",
+        "nixpkgs": "nixpkgs",
         "utils": "utils"
       }
     },
+    "rust-analyzer-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1662377094,
+        "narHash": "sha256-0bvOQxEe8nzk/VlhHBrUn/Mz3DlE92Us7JqveVjTe0A=",
+        "owner": "rust-lang",
+        "repo": "rust-analyzer",
+        "rev": "6dfd8aebdfa1ee1824446f01daf5bdb229b32f92",
+        "type": "github"
+      },
+      "original": {
+        "owner": "rust-lang",
+        "ref": "nightly",
+        "repo": "rust-analyzer",
+        "type": "github"
+      }
+    },
     "utils": {
       "locked": {
         "lastModified": 1659877975,

flake.nix

@@ -2,38 +2,66 @@
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs";
     utils.url = "github:numtide/flake-utils";
-    naersk.url = "github:nix-community/naersk";
+    naersk = {
+      url = "github:nix-community/naersk";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    fenix = {
+      url = "github:nix-community/fenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
-  outputs = { self, nixpkgs, utils, naersk }:
-    utils.lib.eachDefaultSystem (system:
-    let
-      pkgs = nixpkgs.legacyPackages."${system}";
-      naersk-lib = naersk.lib."${system}";
-    in rec 
-    {
-      packages.jade = naersk-lib.buildPackage {
-        pname = "jade";
-        root = ./.;
-      };
-      
-      packages.default = packages.jade;
+  outputs = {
+    self,
+    nixpkgs,
+    utils,
+    naersk,
+    fenix,
+    ...
+  }:
+    utils.lib.eachDefaultSystem (system: let
+        pkgs = nixpkgs.legacyPackages."${system}";
+        toolchain = with fenix.packages."${system}";
+          combine [
+            latest.rustc
+            latest.cargo
+            latest.clippy
+            latest.rustfmt
+            latest.rust-analyzer
+            latest.rust-src
+          ];
+        naersk-lib = naersk.lib."${system}".override {
+          cargo = toolchain;
+          rustc = toolchain;
+          clippy = toolchain;
+          rustfmt = toolchain;
+          rust-analyzer = toolchain;
+          rust-src = toolchain;
+        };
+      in rec
+      {
+        packages.jade = naersk-lib.buildPackage {
+          pname = "Jade";
+          root = ./.;
+        };
 
-      apps.jade = utils.lib.mkApp {
-        drv = packages.jade;
-      };
-      
-      apps.default = apps.jade;
+        packages.default = packages.jade;
 
-      devShells.default = pkgs.mkShell {
-        nativeBuildInputs = with pkgs; [
-          rustc
-          cargo
-          rustfmt
-          cargo-audit
-          clippy
-        ];
-      };
-    });
-}
+        apps.jade = utils.lib.mkApp {
+          drv = packages.jade;
+        };
+
+        apps.default = apps.jade;
 
+        devShells.default = pkgs.mkShell {
+          nativeBuildInputs = [
+            toolchain
+          ];
+          # For rust-analyzer
+          RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
+        };
+
+        formatter = pkgs.alejandra;
+      });
+}