From 45236f248e89ec3ecf438b6e56b5408ddc2be690 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Czy=C5=BC?= <mike@c2yz.com>
Date: Sun, 15 Dec 2024 18:55:28 +0100
Subject: [PATCH] feat: nix flake

---
 .envrc     |  1 +
 .gitignore |  1 +
 flake.lock | 46 +++++++++++++++++++++++++++++++
 flake.nix  | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 129 insertions(+)
 create mode 100644 .envrc
 create mode 100644 flake.lock
 create mode 100644 flake.nix

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..8392d15
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index cc1ca4d..65daf06 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /target
 **/target
 .env
+.direnv/
\ No newline at end of file
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..fc23b72
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,46 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1734119587,
+        "narHash": "sha256-AKU6qqskl0yf2+JdRdD0cfxX4b9x3KKV5RqA6wijmPM=",
+        "rev": "3566ab7246670a43abd2ffa913cc62dad9cdf7d5",
+        "revCount": 721821,
+        "type": "tarball",
+        "url": "https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.721821%2Brev-3566ab7246670a43abd2ffa913cc62dad9cdf7d5/0193cb18-1103-723d-8c38-29b3e808b002/source.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://flakehub.com/f/NixOS/nixpkgs/0.1.%2A.tar.gz"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1734230139,
+        "narHash": "sha256-zsp0Mz8VgyIAnU8UhP/YT1g+zlsl+NIJTBMAbY+RifQ=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "150fbc8aa2bc501041810bbc1dbfe73694a861be",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..670d316
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,81 @@
+{
+  description = "A Nix-flake-based Rust development environment";
+
+  inputs = {
+    nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.*.tar.gz";
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      rust-overlay,
+    }:
+    let
+      supportedSystems = [
+        "x86_64-linux"
+        "aarch64-linux"
+        "x86_64-darwin"
+        "aarch64-darwin"
+      ];
+      forEachSupportedSystem =
+        f:
+        nixpkgs.lib.genAttrs supportedSystems (
+          system:
+          f {
+            pkgs = import nixpkgs {
+              inherit system;
+              overlays = [
+                rust-overlay.overlays.default
+                self.overlays.default
+              ];
+            };
+          }
+        );
+    in
+    {
+      overlays.default = final: prev: {
+        rustToolchain =
+          let
+            rust = prev.rust-bin;
+          in
+          if builtins.pathExists ./rust-toolchain.toml then
+            rust.fromRustupToolchainFile ./rust-toolchain.toml
+          else if builtins.pathExists ./rust-toolchain then
+            rust.fromRustupToolchainFile ./rust-toolchain
+          else
+            rust.stable.latest.default.override {
+              extensions = [
+                "rust-src"
+                "rustfmt"
+              ];
+            };
+      };
+
+      devShells = forEachSupportedSystem (
+        { pkgs }:
+        {
+          default = pkgs.mkShell {
+            packages = with pkgs; [
+              rustToolchain
+              openssl
+              pkg-config
+              cargo-deny
+              cargo-edit
+              cargo-watch
+              rust-analyzer
+            ];
+
+            env = {
+              # Required by rust-analyzer
+              RUST_SRC_PATH = "${pkgs.rustToolchain}/lib/rustlib/src/rust/library";
+            };
+          };
+        }
+      );
+    };
+}