ravedude: Add flake.nix

Author: Patryk27

ravedude/README.md

@@ -24,6 +24,10 @@ Next, install the latest version from crates.io with the following command:
 cargo install ravedude
 ```
 
+(alternatively, if you're using NixOS + Flakes, you can install `ravedude` by
+adding `inputs.ravedude.url = "github:Rahix/avr-hal?dir=ravedude";` and then
+`environment.systemPackages = [ ravedude.defaultPackage."${system}" ];`.)
+
 Now you need to add *ravedude* to your project.  For example in a project for
 Arduino Uno, place the following into your `.cargo/config.toml` (**not in
 `Cargo.toml`**):

ravedude/flake.lock

@@ -0,0 +1,34 @@
+{
+  inputs = {
+    utils = {
+      url = "github:numtide/flake-utils";
+    };
+
+    naersk = {
+      url = "github:nix-community/naersk";
+    };
+  };
+
+  outputs = { self, nixpkgs, utils, naersk }:
+    utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+        };
+
+        naersk' = pkgs.callPackage naersk {};
+
+      in
+      rec {
+        defaultPackage = naersk'.buildPackage {
+          pname = "ravedude";
+          src = ./.;
+
+          buildInputs = with pkgs; [
+            pkg-config
+            udev
+          ];
+        };
+      }
+    );
+}