chore: Add Nix-based build and CI configuration.

.envrc

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

.gitea/workflows/test.yml

@@ -26,12 +26,9 @@ jobs:
             ~/.cargo/git/db/
             target/
           key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-      - uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: stable
-          components: rustfmt, clippy
-      - name: install Linux build dependencies
-        run: sudo apt-get update; sudo apt-get install -y --no-install-recommends libasound2-dev libudev-dev libwayland-dev libclang-dev libspeechd-dev
+      - name: Install Nix
+        uses: https://github.com/cachix/install-nix-action@v31
+        if: runner.os == 'linux'
+      - name: Test
+        run: nix develop --command pre-commit run -a
         if: runner.os == 'linux'
-      - uses: actions/setup-python@v3
-      - uses: pre-commit/action@v3.0.1

.gitignore

@@ -1,2 +1,3 @@
 Cargo.lock
-target/
+target/
+.direnv

flake.lock

@@ -0,0 +1,97 @@
+{
+  "nodes": {
+    "naersk": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1745925850,
+        "narHash": "sha256-cyAAMal0aPrlb1NgzMxZqeN1mAJ2pJseDhm2m6Um8T0=",
+        "owner": "nix-community",
+        "repo": "naersk",
+        "rev": "38bc60bbc157ae266d4a0c96671c6c742ee17a5f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "ref": "master",
+        "repo": "naersk",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1747312588,
+        "narHash": "sha256-MmJvj6mlWzeRwKGLcwmZpKaOPZ5nJb/6al5CXqJsgjo=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b1bebd0fe266bbd1820019612ead889e96a8fa2d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1747312588,
+        "narHash": "sha256-MmJvj6mlWzeRwKGLcwmZpKaOPZ5nJb/6al5CXqJsgjo=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b1bebd0fe266bbd1820019612ead889e96a8fa2d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "naersk": "naersk",
+        "nixpkgs": "nixpkgs_2",
+        "utils": "utils"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,55 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    utils.url = "github:numtide/flake-utils";
+    naersk.url = "github:nix-community/naersk/master";
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      utils,
+      naersk,
+    }:
+    utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+        naersk-lib = pkgs.callPackage naersk { };
+      in
+      {
+        devShell =
+          with pkgs;
+          mkShell.override { stdenv = pkgs.clangStdenv; } rec {
+            nativeBuildInputs = [
+              cargo
+              rustc
+              rustfmt
+              rustPackages.clippy
+              pkg-config
+              pre-commit
+              git-cliff
+            ];
+            buildInputs = [
+              speechd
+              udev
+              alsa-lib
+              vulkan-loader
+              xorg.libX11
+              xorg.libXcursor
+              xorg.libXi
+              xorg.libXrandr
+              libxkbcommon
+              wayland
+            ];
+            shellHook = ''
+              export LIBCLANG_PATH="${pkgs.libclang.lib}/lib"
+              export RUSTFLAGS="-C link-arg=-Wl,-rpath,${lib.makeLibraryPath buildInputs}"
+              pre-commit install
+            '';
+            RUST_SRC_PATH = rustPlatform.rustLibSrc;
+          };
+      }
+    );
+}