feat: separate shell.nix and multiple systems

Author: midirhee12

flake.lock

@@ -8,23 +8,26 @@
     ref = "nixos-unstable";
   };
 
-  outputs = { self, nixpkgs }: let
-    system = "x86_64-linux";
-    pkgs = import nixpkgs { inherit system; };
-    basePkgs = with pkgs; [
-      poetry
-      python313
+  outputs = {
+    self,
+    nixpkgs,
+    ...
+  }:
+    let
+      supportedSystems = [
+        "x86_64-linux"
+        "x86_64-darwin"
+        "aarch64-linux"
+        "aarch64-darwin"
+      ];
 
-    ];
-  in {
-    devShells.${system}.default = pkgs.mkShell {
-      packages = with pkgs; [
-      ] ++ basePkgs;
-      shellHook = ''
-        echo "Have fun developing :) - green"
-      '';
-      pkgs.${system}.default = pkgs.stdenv.mkDerivation {
-      };
+      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+    in {
+      devShells = forAllSystems (system: let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in {
+        tux = pkgs.callPackage ./shell.nix { inherit pkgs; };
+        default = self.devShells.${system}.tux;
+      });
     };
-  };
 }

flake.nix

@@ -0,0 +1,16 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+pkgs.mkShell {
+  packages = with pkgs; [
+    python313
+    poetry
+  ];
+
+  shellHook = ''
+    # enters the user's preferred shell
+    $(grep $USER /etc/passwd | sed 's|.*:||g' | tr -d '\n')
+
+    # exits after child shell exits
+    exit
+  '';
+}