init flake

.gitignore

@@ -0,0 +1 @@
+/target

flake.nix

@@ -0,0 +1,92 @@
+{
+  description = "damocles-daemon - Matrix chat presence for Damocles";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+
+    treefmt-nix = {
+      url = "github:numtide/treefmt-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      treefmt-nix,
+      ...
+    }:
+    let
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+      ];
+      forAllSystems =
+        f:
+        nixpkgs.lib.genAttrs systems (
+          system:
+          f {
+            pkgs = nixpkgs.legacyPackages.${system};
+            treefmt-eval = treefmt-nix.lib.evalModule nixpkgs.legacyPackages.${system} treefmt-config;
+          }
+        );
+      treefmt-config = {
+        projectRootFile = "flake.nix";
+        programs.nixfmt.enable = true;
+        programs.rustfmt.enable = true;
+        programs.taplo.enable = true;
+      };
+    in
+    {
+      packages = forAllSystems (
+        { pkgs, ... }:
+        {
+          default = pkgs.rustPlatform.buildRustPackage {
+            pname = "damocles-daemon";
+            version = "0.1.0";
+            src = nixpkgs.lib.cleanSource ./.;
+            cargoLock.lockFile = ./Cargo.lock;
+
+            nativeBuildInputs = with pkgs; [ pkg-config ];
+            buildInputs = with pkgs; [
+              openssl
+            ];
+
+            meta = {
+              description = "Matrix chat daemon for Damocles";
+              mainProgram = "damocles-daemon";
+              platforms = nixpkgs.lib.platforms.linux;
+            };
+          };
+        }
+      );
+
+      devShells = forAllSystems (
+        { pkgs, ... }:
+        {
+          default = pkgs.mkShell {
+            packages = with pkgs; [
+              cargo
+              rustc
+              rust-analyzer
+              clippy
+              rustfmt
+              pkg-config
+              openssl
+            ];
+          };
+        }
+      );
+
+      formatter = forAllSystems ({ treefmt-eval, ... }: treefmt-eval.config.build.wrapper);
+
+      checks = forAllSystems (
+        { pkgs, treefmt-eval, ... }:
+        {
+          formatting = treefmt-eval.config.build.check self;
+          build = self.packages.${pkgs.stdenv.hostPlatform.system}.default;
+        }
+      );
+    };
+}