ci: improvements to building in pipeline

flake.nix

@@ -2,8 +2,8 @@
   description = "Skynet Discord Bot";
 
   inputs = {
-    nixpkgs.url = "nixpkgs/nixos-23.05";
-    naersk.url = "github:nix-community/naersk";
+    nixpkgs.url = "nixpkgs/nixos-24.05";
+    crane.url = "github:ipetkov/crane";
     utils.url = "github:numtide/flake-utils";
   };
 
@@ -21,26 +21,67 @@
     self,
     nixpkgs,
     utils,
-    naersk,
+    crane,
   }:
     utils.lib.eachDefaultSystem (
       system: let
         pkgs = nixpkgs.legacyPackages."${system}";
-        naersk-lib = naersk.lib."${system}";
+
         package_name = "skynet_discord_bot";
         desc = "Skynet Discord Bot";
-      in rec {
-        # `nix build`
-        packages."${package_name}" = naersk-lib.buildPackage {
+
+        craneLib = crane.mkLib pkgs;
+
+        src = craneLib.cleanCargoSource (craneLib.path ./.);
+
+        commonArgs = {
+          src = src;
+          strictDeps = true;
+
           pname = "${package_name}";
-          root = ./.;
 
           buildInputs = with pkgs; [
+            # Add extra build inputs here, etc.
             openssl
+          ];
+
+          nativeBuildInputs = with pkgs; [
+            # Add extra native build inputs here, etc.
             pkg-config
           ];
         };
 
+        cargoArtifacts = craneLib.buildDepsOnly (commonArgs
+          // {
+            pname = "${package_name}-deps";
+          });
+
+        clippy = craneLib.cargoClippy (commonArgs
+          // {
+            inherit cargoArtifacts;
+            cargoClippyExtraArgs = "--all-targets -- --deny warnings";
+          });
+
+        fmt = craneLib.cargoFmt {
+          inherit src;
+        };
+
+        result = craneLib.buildPackage (commonArgs
+          // {
+            inherit cargoArtifacts;
+          });
+      in rec {
+        packages = {
+          # nix build --verbose
+          "${package_name}" = result;
+
+          # nix build --verbose .#clippy
+          clippy = clippy;
+
+          # nix build --verbose .#fmt
+          fmt = fmt;
+        };
+
         defaultPackage = packages."${package_name}";
 
         # `nix run`