Added nix stuff

.envrc

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

default.nix

@@ -0,0 +1,51 @@
+# (import (
+#   fetchTarball {
+#     url = "https://github.com/edolstra/flake-compat/archive/99f1c2157fba4bfe6211a321fd0ee43199025dbf.tar.gz";
+#     sha256 = "0x2jn3vrawwv9xp15674wjz9pixwjyj3j771izayl962zziivbx2"; }
+# ) {
+#   src =  ./.;
+# }).defaultNix
+{ lib
+, naersk
+, stdenv
+, clangStdenv
+, hostPlatform
+, targetPlatform
+, pkg-config
+, libiconv
+, rustfmt
+, cargo
+, rustc
+, openssl
+}:
+let cargoToml = (builtins.fromTOML (builtins.readFile ./Cargo.toml));
+in
+naersk.lib."${targetPlatform.system}".buildPackage rec {
+  src = ./.;
+
+  buildInputs = [
+    rustfmt
+    pkg-config
+    cargo
+    rustc
+    libiconv
+    openssl
+  ];
+
+  checkInputs = [ cargo rustc ];
+  doCheck = true;
+
+  CARGO_BUILD_INCREMENTAL = "false";
+  RUST_BACKTRACE = "full";
+  copyLibs = true;
+
+  name = cargoToml.package.name;
+  version = cargoToml.package.version;
+
+  meta = with lib; {
+    description = cargoToml.package.description;
+    homepage = cargoToml.package.homepage;
+    license = with licenses; [ mit ];
+    maintainers = with maintainers; [ ];
+  };
+}

flake.lock

@@ -0,0 +1,60 @@
+{
+  "nodes": {
+    "naersk": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1636968630,
+        "narHash": "sha256-/C8OVV8mo9M9MgQprHo4A5bM9waWMsw6PI4hb4DnGaA=",
+        "owner": "nmattia",
+        "repo": "naersk",
+        "rev": "55c4c0288ea3f115b5dd73af88052c4712994746",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nmattia",
+        "ref": "master",
+        "repo": "naersk",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1636976544,
+        "narHash": "sha256-9ZmdyoRz4Qu8bP5BKR1T10YbzcB9nvCeQjOEw2cRKR0=",
+        "path": "/nix/store/ha4ld6wd29q1igjmhjdvkvbxpxxxxbxf-source",
+        "rev": "931ab058daa7e4cd539533963f95e2bb0dbd41e6",
+        "type": "path"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1637186689,
+        "narHash": "sha256-NU7BhgnwA/3ibmCeSzFK6xGi+Bari9mPfn+4cBmyEjw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "7fad01d9d5a3f82081c00fb57918d64145dc904c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "naersk": "naersk",
+        "nixpkgs": "nixpkgs_2"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+
+  inputs = {
+    naersk.url = "github:nmattia/naersk/master";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  };
+
+  outputs = { self, nixpkgs, naersk }:
+    let
+      cargoToml = (builtins.fromTOML (builtins.readFile ./Cargo.toml));
+      supportedSystems = [ "x86_64-linux" "aarch64-linux" ];
+      forAllSystems = f: nixpkgs.lib.genAttrs supportedSystems (system: f system);
+    in
+    {
+      overlay = final: prev: {
+        "${cargoToml.package.name}" = final.callPackage ./. { inherit naersk; };
+      };
+
+      packages = forAllSystems (system:
+        let
+          pkgs = import nixpkgs {
+            inherit system;
+            overlays = [
+              self.overlay
+            ];
+          };
+        in
+        {
+          "${cargoToml.package.name}" = pkgs."${cargoToml.package.name}";
+        });
+
+      defaultPackage = forAllSystems (system: (import nixpkgs {
+        inherit system;
+        overlays = [ self.overlay ];
+      })."${cargoToml.package.name}");
+
+      checks = forAllSystems (system:
+        let
+          pkgs = import nixpkgs {
+            inherit system;
+            overlays = [ self.overlay ];
+          };
+        in
+        {
+          format = pkgs.runCommand "check-format"
+            {
+              buildInputs = with pkgs; [ rustfmt cargo ];
+            } ''
+            ${pkgs.rustfmt}/bin/cargo-fmt fmt --manifest-path ${./.}/Cargo.toml -- --check
+            ${pkgs.nixpkgs-fmt}/bin/nixpkgs-fmt --check ${./.}
+            touch $out
+          '';
+          "${cargoToml.package.name}" = pkgs."${cargoToml.package.name}";
+        }
+      );
+
+      devShell = forAllSystems (system:
+        let pkgs = import nixpkgs {
+          inherit system;
+          overlays = [ self.overlay ];
+        };
+        in
+        pkgs.mkShell {
+          inputsFrom = with pkgs; [
+            pkgs."${cargoToml.package.name}"
+          ];
+          buildInputs = with pkgs; [
+            rustfmt
+            nixpkgs-fmt
+          ];
+          LIBCLANG_PATH = "${pkgs.llvmPackages.libclang.lib}/lib";
+        }
+      );
+    };
+
+}

rust-toolchain.toml

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+[toolchain]
+channel = "stable"
+components = [ "rustfmt", "clippy" ]