convert shell.nix to flake.nix

flake.nix

@@ -0,0 +1,125 @@
+{
+  description = "Flake for servicepoint-simulator";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.05";
+    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 = lib.genAttrs supported-systems;
+      make-rust-toolchain-core =
+        pkgs:
+        pkgs.symlinkJoin {
+          name = "rust-toolchain-core";
+          paths = with pkgs; [
+            rustc
+            cargo
+            rustPlatform.rustcSrc
+          ];
+        };
+    in
+    rec {
+      packages = forAllSystems (
+        system:
+        let
+          pkgs = nixpkgs.legacyPackages."${system}";
+          rust-toolchain-core = make-rust-toolchain-core pkgs;
+          naersk' = pkgs.callPackage naersk {
+            cargo = rust-toolchain-core;
+            rustc = rust-toolchain-core;
+          };
+          source = nix-filter.lib.filter {
+             root = ./.;
+             include = [
+               ./Cargo.toml
+               ./Cargo.lock
+               ./crates
+               ./Web437_IBM_BIOS.woff
+               ./README.md
+               ./LICENSE
+             ];
+           };
+        in
+        rec {
+          servicepoint = naersk'.buildPackage rec {
+            cargoBuildOptions =
+              x:
+              x
+              ++ [
+                "-p"
+                "servicepoint"
+              ];
+            cargoTestOptions =
+              x:
+              x
+              ++ [
+                "-p"
+                "servicepoint"
+              ];
+            src = source;
+            doCheck = true;
+            nativeBuildInputs = with pkgs; [
+              pkg-config
+              makeWrapper
+            ];
+            strictDeps = true;
+            buildInputs = with pkgs; [
+              xe
+              lzma
+            ];
+          };
+        }
+      );
+
+      legacyPackages = packages;
+
+      devShells = forAllSystems (
+        system:
+        let
+          pkgs = nixpkgs.legacyPackages."${system}";
+          rust-toolchain = pkgs.symlinkJoin {
+            name = "rust-toolchain";
+            paths = with pkgs; [
+              (make-rust-toolchain-core pkgs)
+              rustfmt
+              clippy
+              cargo-expand
+              cargo-tarpaulin
+              gcc
+              gnumake
+              dotnet-sdk_8
+            ];
+          };
+        in
+        {
+          default = pkgs.mkShell rec {
+            inputsFrom = [ self.packages.${system}.servicepoint ];
+            packages = [ rust-toolchain ];
+            LD_LIBRARY_PATH = "${pkgs.lib.makeLibraryPath (builtins.concatMap (d: d.buildInputs) inputsFrom)}";
+            RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
+          };
+        }
+      );
+
+      formatter = forAllSystems (system: nixpkgs.legacyPackages."${system}".nixfmt-rfc-style);
+    };
+}