dev: nix environment

devshell/default.nix

@@ -0,0 +1,47 @@
+{ inputs, flake, self, pkgs }:
+let
+  rustToolchain = pkgs.pkgsBuildHost.rust-bin.fromRustupToolchainFile ../rust-toolchain.toml;
+  runtimeLibraries = with pkgs; [
+    alsa-lib
+    vulkan-loader
+    udev
+    libx11
+    libxcursor
+    libxi
+    libxrandr
+    libxkbcommon
+    wayland
+  ];
+in {
+  default = pkgs.mkShell {
+    buildInputs = with pkgs; [
+      rustToolchain
+      stdenv.cc
+      git
+      pkg-config
+      shellcheck
+      file
+      openssl
+    ] ++ runtimeLibraries;
+
+    shellHook = ''
+      export RUST_SRC_PATH="${rustToolchain}/lib/rustlib/src/rust/library"
+
+      if [ -d /run/opengl-driver/lib ]; then
+        export LD_LIBRARY_PATH="/run/opengl-driver/lib''${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"
+      fi
+
+      export LD_LIBRARY_PATH="${pkgs.lib.makeLibraryPath runtimeLibraries}''${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"
+
+      if git_root=$(${pkgs.git}/bin/git rev-parse --show-toplevel 2>/dev/null); then
+        export LOCAL_DIR="$git_root"
+      else
+        export LOCAL_DIR="$PWD"
+      fi
+
+      printf '%s\n' "bevy_controls dev shell"
+      printf '%s\n' "Library: cargo check && cargo test"
+      printf '%s\n' "Example: cd crate/bevy_controls/example/basic && cargo run --features x11"
+    '';
+  };
+}

flake.nix

@@ -1,38 +1,28 @@
 {
+  description = "Bevy controls library and examples";
+
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-    flake-utils.url = "github:numtide/flake-utils";
+    hearth = {
+      url = "git+https://gitea.hectic-lab.com/hinterland/hearth.git";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
     rust-overlay = {
       url = "github:oxalica/rust-overlay";
-      inputs = {
-        nixpkgs.follows = "nixpkgs";
-        flake-utils.follows = "flake-utils";
-      };
+      inputs.nixpkgs.follows = "nixpkgs";
     };
   };
 
-  outputs = { self, nixpkgs, flake-utils, rust-overlay }:
-    flake-utils.lib.eachDefaultSystem
-      (system:
+  outputs = { self, hearth, ... }@inputs:
   let
-          overlays = [ (import rust-overlay) ];
-          pkgs = import nixpkgs {
-            inherit system overlays;
-          };
-          rustToolchain = (pkgs.pkgsBuildHost.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml);
-	  nativeBuildInputs = with pkgs; [ rustToolchain pkg-config ];
-          buildInputs = with pkgs; [ 
-	    openssl 
-	    shellcheck
-	    file
-	  ];
+    flake = builtins.warn "Using the `flake` variable may produce a large source closure." ./.;
+    lib = import ./lib { inherit inputs flake self; };
   in
-        with pkgs;
-        {
-          devShells.default = mkShell {
-            inherit buildInputs nativeBuildInputs;
+  hearth.lib.forAllSystemsWithPkgs lib.composedOverlays ({ system, pkgs }: {
+    legacyPackages.${system} = pkgs;
+    packages.${system} = import ./package { inherit self inputs flake pkgs; };
+    devShells.${system} = import ./devshell { inherit self inputs flake pkgs; };
+  }) // {
+    inherit lib;
   };
-        }
-      );
-
 }

lib/default.nix

@@ -0,0 +1,10 @@
+{ self, flake, inputs }:
+let
+  overlays = with inputs; [
+    hearth.overlays.default
+    (import rust-overlay)
+  ];
+in {
+  nixpkgs-lib = inputs.nixpkgs.lib;
+  composedOverlays = overlays;
+}

package/bevy-controls/default.nix

@@ -0,0 +1,38 @@
+{ pkgs }:
+let
+  rustToolchain = pkgs.pkgsBuildHost.rust-bin.fromRustupToolchainFile ../../rust-toolchain.toml;
+  rustPlatform = pkgs.makeRustPlatform {
+    rustc = rustToolchain;
+    cargo = rustToolchain;
+  };
+in rustPlatform.buildRustPackage {
+  pname = "bevy-controls";
+  version = "0.1.0";
+  src = ../..;
+
+  cargoLock.lockFile = ../../Cargo.lock;
+  cargoBuildFlags = [ "--workspace" ];
+  cargoTestFlags = [ "--workspace" ];
+
+  nativeBuildInputs = with pkgs; [
+    pkg-config
+  ];
+
+  buildInputs = with pkgs; [
+    openssl
+    alsa-lib
+    vulkan-loader
+    udev
+    libx11
+    libxcursor
+    libxi
+    libxrandr
+    libxkbcommon
+    wayland
+  ];
+
+  installPhase = ''
+    mkdir -p "$out"
+    touch "$out/workspace-built"
+  '';
+}

package/default.nix

@@ -0,0 +1,5 @@
+{ pkgs, ... }:
+{
+  bevy-controls = import ./bevy-controls { inherit pkgs; };
+  default = import ./bevy-controls { inherit pkgs; };
+}

rust-toolchain.toml

@@ -1,3 +1,3 @@
 [toolchain]
 channel = '1.79.0'
-components = ["rustfmt", "clippy"]
+components = ["rustfmt", "clippy", "rust-src"]