initial commit

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

rust/flake.nix

@@ -0,0 +1,36 @@
+{
+  description = "eulerfunt in Rust";
+
+  inputs = {
+    nixpkgs.url = github:nixos/nixpkgs/release-22.05;
+    utils.url = github:numtide/flake-utils;
+    rust-overlay.url = github:oxalica/rust-overlay;
+  };
+
+  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
+        {
+          devShells = rec {
+            default = pkgs.mkShell {
+              buildInputs = [ toolchain ];
+            };
+            withLsp = pkgs.mkShell {
+              buildInputs = [
+                toolchain
+                pkgs.rust-analyzer
+              ];
+            };
+          };
+        }
+      );
+}