Simplified flake definition

.gitignore

@@ -1 +1,3 @@
 /target
+.direnv
+result

default.nix

@@ -1,51 +1,7 @@
-# (import (
-#   fetchTarball {
-#     url = "https://github.com/edolstra/flake-compat/archive/99f1c2157fba4bfe6211a321fd0ee43199025dbf.tar.gz";
-#     sha256 = "0x2jn3vrawwv9xp15674wjz9pixwjyj3j771izayl962zziivbx2"; }
-# ) {
-#   src =  ./.;
-# }).defaultNix
-{ lib
-, naersk
-, stdenv
-, clangStdenv
-, hostPlatform
-, targetPlatform
-, pkg-config
-, libiconv
-, rustfmt
-, cargo
-, rustc
-, openssl
-}:
-let cargoToml = (builtins.fromTOML (builtins.readFile ./Cargo.toml));
-in
-naersk.lib."${targetPlatform.system}".buildPackage rec {
-  src = ./.;
-
-  buildInputs = [
-    rustfmt
-    pkg-config
-    cargo
-    rustc
-    libiconv
-    openssl
-  ];
-
-  checkInputs = [ cargo rustc ];
-  doCheck = true;
-
-  CARGO_BUILD_INCREMENTAL = "false";
-  RUST_BACKTRACE = "full";
-  copyLibs = true;
-
-  name = cargoToml.package.name;
-  version = cargoToml.package.version;
-
-  meta = with lib; {
-    description = cargoToml.package.description;
-    homepage = cargoToml.package.homepage;
-    license = with licenses; [ mit ];
-    maintainers = with maintainers; [ ];
-  };
-}
+(import (
+  fetchTarball {
+    url = "https://github.com/edolstra/flake-compat/archive/99f1c2157fba4bfe6211a321fd0ee43199025dbf.tar.gz";
+    sha256 = "0x2jn3vrawwv9xp15674wjz9pixwjyj3j771izayl962zziivbx2"; }
+) {
+  src =  ./.;
+}).defaultNix

flake.lock

@@ -51,7 +51,23 @@
     "root": {
       "inputs": {
         "naersk": "naersk",
-        "nixpkgs": "nixpkgs_2"
+        "nixpkgs": "nixpkgs_2",
+        "utils": "utils"
+      }
+    },
+    "utils": {
+      "locked": {
+        "lastModified": 1637014545,
+        "narHash": "sha256-26IZAc5yzlD9FlDT54io1oqG/bBoyka+FJk5guaX4x4=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "bba5dcc8e0b20ab664967ad83d24d64cb64ec4f4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
       }
     }
   },

flake.nix

@@ -3,74 +3,43 @@
   inputs = {
     naersk.url = "github:nmattia/naersk/master";
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, naersk }:
-    let
-      cargoToml = (builtins.fromTOML (builtins.readFile ./Cargo.toml));
-      supportedSystems = [ "x86_64-linux" "aarch64-linux" ];
-      forAllSystems = f: nixpkgs.lib.genAttrs supportedSystems (system: f system);
-    in
-    {
-      overlay = final: prev: {
-        "${cargoToml.package.name}" = final.callPackage ./. { inherit naersk; };
-      };
-
-      packages = forAllSystems (system:
-        let
-          pkgs = import nixpkgs {
-            inherit system;
-            overlays = [
-              self.overlay
-            ];
-          };
-        in
-        {
-          "${cargoToml.package.name}" = pkgs."${cargoToml.package.name}";
-        });
-
-      defaultPackage = forAllSystems (system: (import nixpkgs {
-        inherit system;
-        overlays = [ self.overlay ];
-      })."${cargoToml.package.name}");
-
-      checks = forAllSystems (system:
-        let
-          pkgs = import nixpkgs {
-            inherit system;
-            overlays = [ self.overlay ];
-          };
-        in
-        {
-          format = pkgs.runCommand "check-format"
-            {
-              buildInputs = with pkgs; [ rustfmt cargo ];
-            } ''
-            ${pkgs.rustfmt}/bin/cargo-fmt fmt --manifest-path ${./.}/Cargo.toml -- --check
-            ${pkgs.nixpkgs-fmt}/bin/nixpkgs-fmt --check ${./.}
-            touch $out
-          '';
-          "${cargoToml.package.name}" = pkgs."${cargoToml.package.name}";
-        }
-      );
-
-      devShell = forAllSystems (system:
-        let pkgs = import nixpkgs {
-          inherit system;
-          overlays = [ self.overlay ];
+  outputs = { self, nixpkgs, utils, naersk }:
+    utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+        naersk-lib = pkgs.callPackage naersk { };
+      in
+      rec {
+        overlay = final: prev: {
+          ha-now-playing = final.callPackage ./.;
         };
-        in
-        pkgs.mkShell {
-          inputsFrom = with pkgs; [
-            pkgs."${cargoToml.package.name}"
+
+        packages.ha-now-playing = naersk-lib.buildPackage {
+          pname = "ha-now-playing";
+          root = ./.;
+
+          buildInputs = with pkgs;[
+            openssl
           ];
-          buildInputs = with pkgs; [
-            rustfmt
-            nixpkgs-fmt
+          nativeBuildInputs = with pkgs; [
+            pkg-config
           ];
-          LIBCLANG_PATH = "${pkgs.llvmPackages.libclang.lib}/lib";
-        }
-      );
-    };
+        };
+        defaultPackage = packages.ha-now-playing;
+
+        apps.ha-now-playing = utils.lib.mkApp {
+          drv = self.defaultPackage."${system}";
+        };
+        defaultApp = apps.ha-now-playing;
+
+        devShell = with pkgs; mkShell {
+          buildInputs = [ cargo rustc rustfmt pre-commit rustPackages.clippy ];
+          RUST_SRC_PATH = rustPlatform.rustLibSrc;
+        };
+
+      });
 
 }

shell.nix

@@ -0,0 +1,7 @@
+(import (
+  fetchTarball {
+    url = "https://github.com/edolstra/flake-compat/archive/99f1c2157fba4bfe6211a321fd0ee43199025dbf.tar.gz";
+    sha256 = "0x2jn3vrawwv9xp15674wjz9pixwjyj3j771izayl962zziivbx2"; }
+) {
+  src =  ./.;
+}).shellNix