Add shell.nix

shell.nix

@@ -0,0 +1,41 @@
+{ nixpkgs ? import <nixpkgs> { }}:
+let
+  rust_overlay = builtins.fetchTarball "https://github.com/oxalica/rust-overlay/archive/master.tar.gz";
+  pinned_pkgs = nixpkgs.fetchFromGitHub {
+    owner  = "NixOS";
+    repo   = "nixpkgs";
+    rev    = "07875d32d5e067ffd440c5631facd0213233501a";
+    sha256 = "13j941r2lkdcfcdx9n4ig5wzk21ybs9czlsihdrm0vybbx6l5f3x";
+  };
+  pkgs = import pinned_pkgs {
+    overlays = [ (import rust_overlay ) ];
+  };
+  rust-bin = (pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain).override {
+    extensions = [ "rust-src" ];
+  };
+in
+  pkgs.mkShell {
+    buildInputs = with pkgs; [
+      rust-bin
+      cargo-deny
+      clang
+      llvmPackages.libclang
+      olm
+      pkgconfig
+      openssl
+      openssl.dev
+      gmp
+      m4
+      zlib
+      cmake
+      docker-compose
+      dpkg
+      asciidoctor
+      git
+    ] ++ lib.optionals stdenv.isDarwin [
+      darwin.apple_sdk.frameworks.Security
+      darwin.apple_sdk.frameworks.CoreServices
+    ];
+
+    LIBCLANG_PATH="${pkgs.llvmPackages.libclang}/lib";
+  }