Add Rust template

.github/workflows/ci.yaml

@@ -42,4 +42,15 @@ jobs:
 
       - name: Check NixOS template
         run: |
+          echo "Building NixOS toplevel ❄️"
           nix build --no-link ./nixos#nixosConfigurations.my-system.config.system.build.toplevel
+          echo "NixOS template OK ✅"
+
+      - name: Check Rust template
+        run: |
+          system=$(nix eval --raw --impure --expr 'builtins.currentSystem')
+          echo "Build Rust dev shell 🦀"
+          nix build "./rust#devShells.${system}.default"
+          echo "Building Rust package 🦀"
+          nix build './rust'
+          echo "Rust template OK ✅"

default/flake.nix

@@ -2,7 +2,7 @@
   description = "An empty flake template that you can adapt to your own environment";
 
   # Flake inputs
-  inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0"; # Stable Nixpkgs
+  inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0"; # Stable Nixpkgs (use 0.1 for unstable)
 
   # Flake outputs
   outputs =

flake.nix

@@ -57,6 +57,24 @@
                 https://search.nixos.org/options
           '';
         };
+
+        rust = {
+          description = "A flake template for Rust";
+          path = ./rust;
+          welcomeText = ''
+            # Welcome to your new NixOS configuration flake ❄️🦀
+
+            To activate your new flake's development environment, run `nix develop` or `direnv allow` if you use direnv.
+
+            To run the Rust program in this template (you should a warm greeting):
+
+                nix develop --command cargo run
+
+            To build the Rust program using Nix:
+
+                nix build
+          '';
+        };
       };
     };
 }

nix-darwin/flake.nix

@@ -3,14 +3,14 @@
 
   # Flake inputs
   inputs = {
-    # Stable Nixpkgs
+    # Stable Nixpkgs (use 0.1 for unstable)
     nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0";
-    # Stable nix-darwin
+    # Stable nix-darwin (use 0.1 for unstable)
     nix-darwin = {
       url = "https://flakehub.com/f/nix-darwin/nix-darwin/0";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-    # Determinate module
+    # Determinate 3.* module
     determinate = {
       url = "https://flakehub.com/f/DeterminateSystems/determinate/3";
       inputs.nixpkgs.follows = "nixpkgs";

nixos/flake.nix

@@ -3,7 +3,7 @@
 
   # Flake inputs
   inputs = {
-    nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0"; # Stable Nixpkgs
+    nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0"; # Stable Nixpkgs (use 0.1 for unstable)
     determinate = {
       url = "https://flakehub.com/f/DeterminateSystems/determinate/3"; # Determinate 3.*
       inputs.nixpkgs.follows = "nixpkgs";

rust/.envrc

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

rust/.gitignore

@@ -0,0 +1,5 @@
+# Rust artifacts
+/target/
+
+# Nix artifacts
+result*

rust/Cargo.toml

@@ -0,0 +1,4 @@
+[package]
+name = "rust-flake-template"
+version = "0.1.0"
+edition = "2024"

rust/flake.nix

@@ -0,0 +1,103 @@
+{
+  description = "A Rust flake template that you can adapt to your own environment";
+
+  # Flake inputs
+  inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0"; # Stable Nixpkgs (use 0.1 for unstable)
+
+  # Flake outputs
+  outputs =
+    { self, ... }@inputs:
+    let
+      # The systems supported for this flake's outputs
+      supportedSystems = [
+        "x86_64-linux" # 64-bit Intel/AMD Linux
+        "aarch64-linux" # 64-bit ARM Linux
+        "x86_64-darwin" # 64-bit Intel macOS
+        "aarch64-darwin" # 64-bit ARM macOS
+      ];
+
+      # Helper for providing system-specific attributes
+      forEachSupportedSystem =
+        f:
+        inputs.nixpkgs.lib.genAttrs supportedSystems (
+          system:
+          f {
+            # Provides a system-specific, configured Nixpkgs
+            pkgs = import inputs.nixpkgs {
+              inherit system;
+              # Enable using unfree packages
+              config.allowUnfree = true;
+            };
+          }
+        );
+    in
+    {
+      # Development environments output by this flake
+      devShells = forEachSupportedSystem (
+        { pkgs }:
+        {
+          # Run `nix develop` to activate this environment or `direnv allow` if you have direnv installed
+          default = pkgs.mkShell {
+            # The Nix packages provided in the environment
+            packages = with pkgs; [
+              cargo
+              rustc
+              clippy
+              rustfmt
+              rust-analyzer # Rust language server for IDEs
+              # Uncomment the lines below for some helpful tools:
+              # cargo-edit # Commands like `cargo add` and `cargo rm`
+              # bacon # For iterative development
+              # cargo-nextest # Rust testing tool
+              # cargo-audit # Check dependencies for vulnerabilities
+              # cargo-outdated # Show which dependencies have updates available
+              # cargo-deny # Lint your dependency graph
+              # cargo-expand # Show macro expansions
+            ];
+
+            # Set any environment variables for your development environment
+            env = {
+              RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
+            };
+
+            # Add any shell logic you want executed when the environment is activated
+            shellHook = ''
+              echo "Rust toolchain 🦀"
+              cargo --version
+            '';
+          };
+        }
+      );
+
+      # Package outputs
+      packages = forEachSupportedSystem (
+        { pkgs }:
+        {
+          # Build the package using Nixpkgs' built-in Rust helpers
+          default =
+            let
+              # Get information about the package from Cargo.toml
+              meta = (builtins.fromTOML (builtins.readFile ./Cargo.toml)).package;
+            in
+            pkgs.rustPlatform.buildRustPackage {
+              inherit (meta) name version;
+              src = builtins.path {
+                path = ./.;
+              };
+              cargoLock.lockFile = ./Cargo.lock;
+            };
+        }
+      );
+
+      # Nix formatter
+
+      # This applies the formatter that follows RFC 166, which defines a standard format:
+      # https://github.com/NixOS/rfcs/pull/166
+
+      # To format all Nix files:
+      # git ls-files -z '*.nix' | xargs -0 -r nix fmt
+      # To check formatting:
+      # git ls-files -z '*.nix' | xargs -0 -r nix develop --command nixfmt --check
+      formatter = forEachSupportedSystem ({ pkgs, ... }: pkgs.nixfmt-rfc-style);
+    };
+}

rust/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello from the Rust template!");
+}