nix: add 'flakes.nix'

flake.lock

@@ -0,0 +1,94 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1614513358,
+        "narHash": "sha256-LakhOx3S1dRjnh0b5Dg3mbZyH0ToC9I8Y2wKSkBaTzU=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "5466c5bbece17adaab2d82fae80b46e807611bf3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "mozillapkgs": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1603906276,
+        "narHash": "sha256-RsNPnEKd7BcogwkqhaV5kI/HuNC4flH/OQCC/4W5y/8=",
+        "owner": "mozilla",
+        "repo": "nixpkgs-mozilla",
+        "rev": "8c007b60731c07dd7a052cce508de3bb1ae849b4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "mozilla",
+        "repo": "nixpkgs-mozilla",
+        "type": "github"
+      }
+    },
+    "naersk": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1614785451,
+        "narHash": "sha256-TPw8kQvr2UNCuvndtY+EjyXp6Q5GEW2l9UafXXh1XmI=",
+        "owner": "nmattia",
+        "repo": "naersk",
+        "rev": "e0fe990b478a66178a58c69cf53daec0478ca6f9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nmattia",
+        "ref": "master",
+        "repo": "naersk",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1617038346,
+        "narHash": "sha256-5AVL8TxnUT/8rX1XfxK05fP+jdf20jhg5gjZ2TLo/Wc=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "8e71416e5d4306c3800133ca6dc2ad4469480b90",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1616670887,
+        "narHash": "sha256-wn+l9qJfR5sj5Gq4DheJHAcBDfOs9K2p9seW2f35xzs=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "c0e881852006b132236cbf0301bd1939bb50867e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "mozillapkgs": "mozillapkgs",
+        "naersk": "naersk",
+        "nixpkgs": "nixpkgs_2"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,48 @@
+{
+  inputs = {
+    naersk.url = "github:nmattia/naersk/master";
+    mozillapkgs = {
+      url = "github:mozilla/nixpkgs-mozilla";
+      flake = false;
+    };
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, naersk, mozillapkgs, nixpkgs, flake-utils, ... }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+
+        mozilla = pkgs.callPackage (mozillapkgs + "/package-set.nix") { };
+        rustNightly = (mozilla.rustChannelOf {
+          date = "2021-03-29";
+          channel = "nightly";
+          sha256 = "sha256-Y94CnslybZgiZlNVV6Cg0TUPV2OeDXakPev1kqdt9Kk=";
+        }).rust;
+
+        naersk-lib = pkgs.callPackage naersk {
+          cargo = rustNightly;
+          rustc = rustNightly;
+        };
+      in
+      {
+        defaultPackage = naersk-lib.buildPackage ./.;
+
+        defaultApp = flake-utils.lib.mkApp {
+          drv = self.defaultPackage."${system}";
+        };
+
+        devShell = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            nixpkgs-fmt
+            pre-commit
+            rustPackages.clippy
+            rustNightly
+            rustfmt
+          ];
+
+          RUST_SRC_PATH = pkgs.rustPlatform.rustLibSrc;
+        };
+      });
+}