Nix flake (#758)

* Added Flake for nix

* Removed Cargo lock from ignore

As it's now reccomended by rust team to keep it in repo as well as nix
needs it fetch dependacies for nix run

* Added Nix Compatbilty for package

I forgot to add it that's why this commit is here.

* Made flake minimal

.envrc

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

.gitignore

@@ -83,10 +83,6 @@ replay_pid*
 debug/
 target/
 
-# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
-# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
-Cargo.lock
-
 # These are backup files generated by rustfmt
 **/*.rs.bk
 
@@ -130,3 +126,9 @@ run/
 *perf.data*
 *flamegraph.svg
 *dhat*
+
+
+# Nix (direnv and result)
+.direnv
+result
+result-*

default.nix

@@ -0,0 +1,13 @@
+(import
+  (
+    let
+      lock = builtins.fromJSON (builtins.readFile ./flake.lock);
+      nodeName = lock.nodes.root.inputs.flake-compat;
+    in
+    fetchTarball {
+      url = lock.nodes.${nodeName}.locked.url or "https://github.com/edolstra/flake-compat/archive/${lock.nodes.${nodeName}.locked.rev}.tar.gz";
+      sha256 = lock.nodes.${nodeName}.locked.narHash;
+    }
+  )
+  { src = ./.; }
+).defaultNix

flake.lock

@@ -0,0 +1,94 @@
+{
+  "nodes": {
+    "flake-compat": {
+      "locked": {
+        "lastModified": 1733328505,
+        "narHash": "sha256-NeCCThCEP3eCl2l/+27kNNK7QrwZB1IJCrXfrbv5oqU=",
+        "rev": "ff81ac966bb2cae68946d5ed5fc4994f96d0ffec",
+        "revCount": 69,
+        "type": "tarball",
+        "url": "https://api.flakehub.com/f/pinned/edolstra/flake-compat/1.1.0/01948eb7-9cba-704f-bbf3-3fa956735b52/source.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://flakehub.com/f/edolstra/flake-compat/1.tar.gz"
+      }
+    },
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1740872218,
+        "narHash": "sha256-ZaMw0pdoUKigLpv9HiNDH2Pjnosg7NBYMJlHTIsHEUo=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "3876f6b87db82f33775b1ef5ea343986105db764",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1741010256,
+        "narHash": "sha256-WZNlK/KX7Sni0RyqLSqLPbK8k08Kq7H7RijPJbq9KHM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ba487dbc9d04e0634c64e3b1f0d25839a0a68246",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1740872140,
+        "narHash": "sha256-3wHafybyRfpUCLoE8M+uPVZinImg3xX+Nm6gEfN3G8I=",
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/6d3702243441165a03f699f64416f635220f4f15.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/6d3702243441165a03f699f64416f635220f4f15.tar.gz"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1741141853,
+        "narHash": "sha256-FauVtC+FbOgkKpGVuQTNxSqrvgbmVc7hFkjn/DacwMo=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "02edad1f19d6dec824e0812e4cdc0aa7930ff8ae",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,52 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    flake-compat.url = "https://flakehub.com/f/edolstra/flake-compat/1.tar.gz";
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = inputs@{ nixpkgs, flake-parts, ... }:
+    flake-parts.lib.mkFlake {inherit inputs;} {
+      systems = nixpkgs.lib.systems.flakeExposed;
+      perSystem = {
+        pkgs,
+        system,
+        ...
+      }:
+      let
+        rustToolchain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
+        manifest = (pkgs.lib.importTOML ./pumpkin/Cargo.toml).package;
+      in
+      {
+        formatter = pkgs.nixfmt-rfc-style;
+        _module.args.pkgs = import nixpkgs {
+          inherit system;
+          overlays = [
+            (import inputs.rust-overlay)
+          ];
+        };
+
+        devShells.default = pkgs.mkShell
+        {
+          nativeBuildInputs = with pkgs; [
+            rustToolchain
+            pkg-config
+          ];
+        };
+
+        packages.default = (pkgs.makeRustPlatform {rustc = rustToolchain; cargo = rustToolchain;}).buildRustPackage {
+            pname = manifest.name;
+            version = manifest.version;
+
+            useFetchCargoVendor = true;
+            cargoLock = {
+                lockFile = ./Cargo.lock;
+            };
+        };
+      };
+    };
+}

shell.nix

@@ -0,0 +1,13 @@
+(import
+  (
+    let
+      lock = builtins.fromJSON (builtins.readFile ./flake.lock);
+      nodeName = lock.nodes.root.inputs.flake-compat;
+    in
+    fetchTarball {
+      url = lock.nodes.${nodeName}.locked.url or "https://github.com/edolstra/flake-compat/archive/${lock.nodes.${nodeName}.locked.rev}.tar.gz";
+      sha256 = lock.nodes.${nodeName}.locked.narHash;
+    }
+  )
+  { src = ./.; }
+).shellNix