From e4400c98eeb71affac09a402df1e75526022a1f2 Mon Sep 17 00:00:00 2001
From: "John C. Burnham" <john@agathic.com>
Date: Wed, 6 Nov 2024 12:09:19 -0500
Subject: [PATCH] add flake.nix

---
 .envrc    |  1 +
 flake.nix | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 .envrc
 create mode 100644 flake.nix

diff --git a/.envrc b/.envrc
new file mode 100644
index 00000000..3550a30f
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 00000000..78265480
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,50 @@
+{
+  inputs = {
+    nixpkgs.url = "nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    naersk = {
+      url = "github:nix-community/naersk";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    fenix = {
+      url = "github:nix-community/fenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, flake-utils, naersk, fenix }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = (import nixpkgs) {
+          inherit system;
+        };
+
+        toolchain = with fenix.packages.${system}; fromToolchainFile {
+          file = ./rust-toolchain.toml; # alternatively, dir = ./.;
+          sha256 = "sha256-2MdP0kK9F6DbEwcQyDZ5Qq1yBkBSLYl2vJtbZHzXNR0=";
+        };
+
+      in rec {
+        defaultPackage = (naersk.lib.${system}.override {
+          # For `nix build` & `nix run`:
+          cargo = toolchain;
+          rustc = toolchain;
+        }).buildPackage {
+          src = ./.;
+        };
+
+        # For `nix develop` or `direnv allow`:
+        devShell = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            pkg-config
+            openssl
+            gcc
+            ocl-icd
+            toolchain
+            rust-analyzer
+            clang
+          ];
+        };
+      }
+    );
+}