Merge pull request #34 from Luxzi/main

add(nix): `flake.nix` to allow building with nix

flake.nix

@@ -0,0 +1,38 @@
+{
+  description = "Terminal Music Player Written In Rust";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  inputs.naersk.url = "github:nix-community/naersk/master";
+  inputs.utils.url = "github:numtide/flake-utils";
+
+  outputs = { self, nixpkgs, utils, naersk, ... }:
+    utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+        naersk-lib = pkgs.callPackage naersk {  };
+      in
+        {
+          defaultPackage = naersk-lib.buildPackage {
+            src = ./.;
+            buildInputs = with pkgs; [
+              pkg-config
+              alsa-lib
+            ];
+          };
+
+          devShell = with pkgs; mkShell {
+            RUST_SRC_PATH = rustPlatform.rustLibSrc;
+            buildInputs = [
+              cargo
+              rustc
+              rustfmt
+              pre-commit
+              rustPackages.clippy
+              rustPackages.rust-analyzer
+              pkg-config
+              alsa-lib
+            ];
+          };
+        }
+    );
+}