feat: initialise flake

flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1716509168,
+        "narHash": "sha256-4zSIhSRRIoEBwjbPm3YiGtbd8HDWzFxJjw5DYSDy1n8=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "bfb7a882678e518398ce9a31a881538679f6f092",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs-unstable": "nixpkgs-unstable",
+        "utils": "utils"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,43 @@
+{
+  description = "Rust development environment for altoku";
+
+  inputs = {
+    utils.url = "github:numtide/flake-utils";
+    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
+  };
+
+  outputs = {
+    self,
+    nixpkgs-unstable,
+    utils,
+    ...
+  }:
+    utils.lib.eachDefaultSystem
+    (
+      system: let
+        pkgs = import nixpkgs-unstable { inherit system; };
+      in rec
+      {
+        # Executed by `nix build`
+        packages.default = pkgs.rustPlatform.buildRustPackage {
+          pname = "altoku";
+          version = "0.1.0";
+          src = ./.;
+          cargoLock.lockFile = ./Cargo.lock;
+        };
+
+        # Executed by `nix run`
+        apps.default = utils.lib.mkApp {drv = packages.default;};
+
+        # Used by `nix develop`
+        devShells.default = pkgs.mkShell rec {
+          shellHook = ''export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${pkgs.lib.makeLibraryPath [
+            pkgs.openssl
+          ]}"'';
+          buildInputs = with pkgs; [
+            openssl mold clang pkg-config
+          ];
+        };
+      }
+    );
+}