remove shell.nix, add flake.nix

.envrc

@@ -1 +1 @@
-use nix
+use flake

flake.lock

@@ -0,0 +1,64 @@
+{
+  "nodes": {
+    "naersk": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1745925850,
+        "narHash": "sha256-cyAAMal0aPrlb1NgzMxZqeN1mAJ2pJseDhm2m6Um8T0=",
+        "owner": "nix-community",
+        "repo": "naersk",
+        "rev": "38bc60bbc157ae266d4a0c96671c6c742ee17a5f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "naersk",
+        "type": "github"
+      }
+    },
+    "nix-filter": {
+      "locked": {
+        "lastModified": 1731533336,
+        "narHash": "sha256-oRam5PS1vcrr5UPgALW0eo1m/5/pls27Z/pabHNy2Ms=",
+        "owner": "numtide",
+        "repo": "nix-filter",
+        "rev": "f7653272fd234696ae94229839a99b73c9ab7de0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "nix-filter",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1746055187,
+        "narHash": "sha256-3dqArYSMP9hM7Qpy5YWhnSjiqniSaT2uc5h2Po7tmg0=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "3e362ce63e16b9572d8c2297c04f7c19ab6725a5",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-24.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "naersk": "naersk",
+        "nix-filter": "nix-filter",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,103 @@
+{
+  description = "Flake for command line interface of the ServicePoint display.";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
+    nix-filter.url = "github:numtide/nix-filter";
+    naersk = {
+      url = "github:nix-community/naersk";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs =
+    inputs@{
+      self,
+      nixpkgs,
+      naersk,
+      nix-filter,
+    }:
+    let
+      lib = nixpkgs.lib;
+      supported-systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+        "aarch64-darwin"
+        "x86_64-darwin"
+      ];
+      forAllSystems =
+        f:
+        lib.genAttrs supported-systems (
+          system:
+          f rec {
+            pkgs = nixpkgs.legacyPackages.${system};
+            naersk' = pkgs.callPackage naersk { };
+            selfPkgs = self.packages."${system}";
+            inherit system;
+          }
+        );
+    in
+    rec {
+      packages = forAllSystems (
+        { pkgs, naersk', ... }:
+        rec {
+          servicepoint-life = naersk'.buildPackage rec {
+            strictDeps = true;
+            nativeBuildInputs = with pkgs; [ pkg-config ];
+            buildInputs = with pkgs; [
+              xe
+              xz
+            ];
+            src = nix-filter.lib.filter {
+              root = ./.;
+              include = [
+                ./Cargo.toml
+                ./Cargo.lock
+                ./src
+                ./README.md
+                ./LICENSE
+              ];
+            };
+          };
+
+          default = servicepoint-life;
+        }
+      );
+
+      legacyPackages = packages;
+
+      apps = forAllSystems (
+        { selfPkgs, ... }:
+        rec {
+          servicepoint-life = {
+            type = "app";
+            program = "${selfPkgs.servicepoint-life}/out/servicepoint-life";
+          };
+          default = servicepoint-life;
+        }
+      );
+
+      devShells = forAllSystems (
+        { pkgs, selfPkgs, ... }:
+        {
+          default = pkgs.mkShell rec {
+            inputsFrom = [ selfPkgs.default ];
+            packages = [
+              pkgs.gdb
+              (pkgs.symlinkJoin {
+                name = "rust-toolchain";
+                paths = with pkgs; [
+                  rustc
+                  cargo
+                  rustfmt
+                  clippy
+                ];
+              })
+            ];
+          };
+        }
+      );
+
+      formatter = forAllSystems ({ pkgs, ... }: pkgs.nixfmt-rfc-style);
+    };
+}

shell.nix

@@ -1,4 +0,0 @@
-{ pkgs ? import <nixpkgs> {} }:
-  pkgs.mkShell {
-    nativeBuildInputs = with pkgs.buildPackages; [ rustup cargo pkg-config xe lzma ];
-}