setting up dev environment

.editorconfig

@@ -0,0 +1,12 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.nix]
+indent_size = 2

.envrc

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

.github/workflows/ci.yaml

@@ -0,0 +1,29 @@
+name: Benda CI
+
+on:
+  pull_request:
+  push:
+    branches: [master]
+
+jobs:
+  checks:
+    name: Nix and Rust checks
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+
+      - name: Check flake.lock
+        uses: DeterminateSystems/flake-checker-action@main
+        with:
+          fail-mode: true
+
+      - name: Clippy
+        run: nix develop -c cargo clippy
+
+      - name: Check Rust formatting
+        run: nix develop -c cargo fmt --check

.gitignore

@@ -1,11 +1,14 @@
+/tmp/
+/.direnv/
+
 # Generated by Cargo
 # will have compiled files and executables
-debug/
-target/
+/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
+/Cargo.lock
 
 # These are backup files generated by rustfmt
 **/*.rs.bk

.vscode/extensions.json

@@ -0,0 +1,5 @@
+{
+  "recommendations": [
+    "rust-lang.rust-analyzer"
+  ]
+}

.vscode/settings.json

@@ -1,6 +1,8 @@
 {
   "cSpell.words": [
     "benda",
+    "Clippy",
+    "nixpkgs",
     "Numba"
   ]
-}
+}

Cargo.toml

@@ -0,0 +1,3 @@
+[workspace]
+resolver = "2"
+members = ["crates/*"]

README.md

@@ -46,3 +46,19 @@ def sum_tree(tree: Tree) -> u24:
 class Leaf2:
   value: int
 ```
+
+## Development
+
+- Install Nix with [Determinate Nix Installer]
+
+  ```sh
+  curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix | sh -s -- install
+  ```
+
+- You can run `nix develop` to enter a shell with the dependencies installed.
+
+- You can use [`direnv`][direnv] to automatically load the environment when you
+  enter the project directory.
+
+[Determinate Nix Installer]: https://install.determinate.systems
+[direnv]: https://direnv.net

crates/placeholder/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "placeholder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

crates/placeholder/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

flake.nix

@@ -0,0 +1,57 @@
+{
+  description = "kindelia-node";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
+    flake-utils.url = "github:numtide/flake-utils";
+    rust-overlay.url = "github:oxalica/rust-overlay";
+    naersk.url = "github:nix-community/naersk";
+  };
+
+  outputs = { self, nixpkgs, rust-overlay, flake-utils, naersk }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        overlays = [ (import rust-overlay) ];
+        pkgs = import nixpkgs {
+          inherit system overlays;
+        };
+        rust_toolchain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
+
+        nativeBuildInputs = [
+          pkgs.git
+          # Build toolchain
+          pkgs.pkg-config
+          pkgs.clang
+          rust_toolchain
+          # Python
+          pkgs.python312
+        ];
+
+        dev_packages = [
+          # GitHub Actions runner
+          pkgs.act
+          # Build tools
+          pkgs.maturin
+          # Python
+          pkgs.pyenv
+        ];
+
+        naersk' = pkgs.callPackage naersk {
+          cargo = rust_toolchain;
+          rustc = rust_toolchain;
+        };
+      in
+      {
+        devShells.default = pkgs.stdenvNoCC.mkDerivation {
+          name = "shell";
+          inherit nativeBuildInputs;
+          buildInputs = dev_packages;
+        };
+
+        packages.default = naersk'.buildPackage {
+          inherit nativeBuildInputs;
+          src = ./.;
+        };
+      }
+    );
+}

rust-toolchain.toml

@@ -0,0 +1,4 @@
+[toolchain]
+profile = "minimal"
+channel = "nightly-2024-05-24"
+components = ["rustfmt", "clippy"]

rustfmt.toml

@@ -0,0 +1,9 @@
+max_width = 80
+tab_spaces = 4
+
+newline_style = "Unix"
+
+# Unstable features
+unstable_features = true
+imports_granularity = "Module"
+group_imports = "StdExternalCrate"