nix: init toolchain

Author: NotAShelf

.envrc

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

flake.lock

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+{
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs";
+
+  outputs = {nixpkgs, ...}: let
+    systems = ["x86_64-linux" "aarch64-linux"];
+    forEachSystem = nixpkgs.lib.genAttrs systems;
+
+    pkgsForEach = nixpkgs.legacyPackages;
+  in {
+    devShells = forEachSystem (system: {
+      default = pkgsForEach.${system}.callPackage ./shell.nix {};
+    });
+  };
+}

flake.nix

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+{
+  mkShell,
+  dbus,
+  python3,
+  pkg-config,
+  rust-analyzer-unwrapped,
+  rustfmt,
+  clippy,
+  cargo,
+  rustc,
+  rustPlatform,
+  xorg,
+}:
+mkShell {
+  env."RUST_SRC_PATH" = "${rustPlatform.rustLibSrc}";
+
+  strictDeps = true;
+  buildInputs = [dbus xorg.libxcb];
+  nativeBuildInputs = [
+    pkg-config
+    python3
+
+    cargo
+    rustc
+    rust-analyzer-unwrapped
+    rustfmt
+    clippy
+  ];
+}