From dae0c7244d90b44ea82fbf01c3b40abca6abdec0 Mon Sep 17 00:00:00 2001
From: Conrad Parker <conradlparker@gmail.com>
Date: Sat, 21 Mar 2026 02:21:09 -0600
Subject: [PATCH] add rust hello world with nix flake

---
 rust/.envrc    |  1 +
 rust/flake.nix | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++
 rust/hello.rs  |  8 ++++++++
 3 files changed, 60 insertions(+)
 create mode 100644 rust/.envrc
 create mode 100644 rust/flake.nix
 create mode 100644 rust/hello.rs

diff --git a/rust/.envrc b/rust/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/rust/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/rust/flake.nix b/rust/flake.nix
new file mode 100644
index 0000000..87e360f
--- /dev/null
+++ b/rust/flake.nix
@@ -0,0 +1,51 @@
+{
+  description = "Rust dev environment";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+
+  outputs = { self, nixpkgs }:
+    let
+      systems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+      forAllSystems = f: nixpkgs.lib.genAttrs systems (system: f {
+        pkgs = import nixpkgs { inherit system; };
+      });
+    in
+    {
+      packages = forAllSystems ({ pkgs }: {
+        default = pkgs.stdenv.mkDerivation {
+          pname = "hello-rust";
+          version = "0.1.0";
+          src = ./.;
+          nativeBuildInputs = [ pkgs.rustc ];
+          buildPhase = ''
+            rustc -O -o hello hello.rs
+          '';
+          installPhase = ''
+            mkdir -p $out/bin
+            cp hello $out/bin/
+          '';
+        };
+      });
+
+      devShells = forAllSystems ({ pkgs }: {
+        default = pkgs.mkShell {
+          packages = with pkgs; [
+            rustc
+            cargo
+            rust-analyzer
+            clippy
+            rustfmt
+          ];
+
+          RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
+        };
+      });
+
+      apps = forAllSystems ({ pkgs }: {
+        default = {
+          type = "app";
+          program = "${self.packages.${pkgs.system}.default}/bin/hello";
+        };
+      });
+    };
+}
diff --git a/rust/hello.rs b/rust/hello.rs
new file mode 100644
index 0000000..a9d2090
--- /dev/null
+++ b/rust/hello.rs
@@ -0,0 +1,8 @@
+fn greet(name: &str) -> String {
+    format!("Hello, {}!", name)
+}
+
+fn main() {
+    let message = greet("World");
+    println!("{}", message);
+}
-- 
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