Setup/nixos enviroment

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -6,3 +6,5 @@
 rustypipe_reports
 rustypipe_cache*.json
 bg_snapshot.bin
+
+.direnv/

flake.nix

@@ -0,0 +1,49 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    rust-overlay = {
+        url = "github:oxalica/rust-overlay";
+        inputs.nixpkgs.follows = "nixpkgs";
+    };
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { nixpkgs, rust-overlay, flake-utils, ...}:
+    flake-utils.lib.eachDefaultSystem ( system:
+      let
+        overlays = [ (import rust-overlay)];
+        pkgs = import nixpkgs { inherit system overlays; };
+        rustToolchain = pkgs.rust-bin.stable.latest.default.override {
+              extensions = [ "rust-src" "rust-analyzer" "rustfmt" "clippy" ];
+            };
+      in
+      {
+        devShells.default = pkgs.mkShell {
+            nativeBuildInputs = [
+                rustToolchain
+
+                pkgs.pkg-config
+                pkgs.gcc
+                pkgs.cmake
+                pkgs.just
+                pkgs.pre-commit
+                pkgs.cargo-nextest
+                pkgs.yq
+                pkgs.direnv
+            ];
+            buildInputs = [
+                pkgs.openssl
+            ];
+            LIBCLANG_PATH = "${pkgs.llvmPackages.libclang.lib}/lib";
+            BINDGEN_EXTRA_CLANG_ARGS = with pkgs; builtins.concatStringsSep " " [
+                "-isystem ${stdenv.cc.cc}/include/c++/${lib.getVersion stdenv.cc.cc}"
+                "-isystem ${stdenv.cc.cc}/include/c++/${lib.getVersion stdenv.cc.cc}/${stdenv.hostPlatform.config}"
+                "-idirafter ${stdenv.cc.cc.lib}/lib/clang/${lib.getVersion stdenv.cc.cc}/include"
+                "-idirafter ${glibc.dev}/include"
+              ];
+            shellHook = ''
+                export RUST_SRC_PATH="${rustToolchain}/lib/rustlib/src/rust/library"
+              '';
+        };
+      });
+}