initial commit

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

flake.nix

@@ -0,0 +1,43 @@
+{
+  description = "Torana danmaku engine";
+
+  inputs = {
+    nixpkgs.url = github:nixos/nixpkgs/release-22.11;
+    rust-overlay.url = github:oxalica/rust-overlay;
+    utils.url = github:numtide/flake-utils;
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    utils,
+    rust-overlay,
+  }:
+    utils.lib.eachDefaultSystem
+    (
+      system: let
+        overlays = [rust-overlay.overlays.default];
+
+        pkgs = import nixpkgs {
+          inherit system overlays;
+        };
+
+        toolchain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain;
+      in rec {
+        devShell = with pkgs;
+          mkShell {
+            nativeBuildInputs = [
+              cmake
+              openssl
+              fontconfig
+              pkg-config
+              llvmPackages.lld
+              rust-analyzer
+              toolchain
+            ];
+          };
+
+        formatter = pkgs.alejandra;
+      }
+    );
+}