generic/rust: init

flake.nix

@@ -0,0 +1,35 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+
+    rust-overlay.url = "github:oxalica/rust-overlay";
+    rust-overlay.inputs.nixpkgs.follows = "nixpkgs";
+  };
+
+  outputs = { self, nixpkgs, rust-overlay }: let
+    systems = [
+      "x86_64-linux"
+      "x86_64-darwin"
+      "aarch64-linux"
+      "aarch64-darwin"
+      "armv7l-linux"
+    ];
+
+    forAllSystems = f: nixpkgs.lib.genAttrs systems (system: let
+      pkgs = import nixpkgs {
+        inherit system;
+        overlays = [
+          (import rust-overlay)
+        ];
+      };
+
+    in f system pkgs);
+
+    inherit (nixpkgs) lib;
+  in {
+    devShells = forAllSystems (system: pkgs: {
+      rust = pkgs.callPackage ./generic/rust/shell.nix { };
+      rust-nightly = pkgs.callPackage ./generic/rust/shell.nix { rust-channel = "nightly"; };
+    });
+  };
+}