Restructured flake

nix-modpack/flake.nix

@@ -6,13 +6,25 @@
   };
 
   outputs =
-    { nixpkgs, nix-minecraft, ... }:
+    inputs:
     let
-      lib = import ./lib {
-        inherit nixpkgs nix-minecraft;
-      };
+      lib = inputs.nixpkgs.lib;
+      eachSystem =
+        fn: lib.genAttrs lib.systems.flakeExposed (system: fn (import inputs.nixpkgs { inherit system; }));
     in
     {
-      __functor = _: lib;
+      packages = eachSystem (
+        pkgs:
+        let
+          bootstrap = pkgs.fetchurl {
+            url = "https://github.com/packwiz/packwiz-installer-bootstrap/releases/download/v0.0.3/packwiz-installer-bootstrap.jar";
+            sha256 = "qPuyTcYEJ46X9GiOgtPZGjGLmO/AjV2/y8vKtkQ9EWw=";
+          };
+        in
+        {
+          mkServer = pkgs.callPackage ./packages/mkServer.nix { inherit bootstrap; };
+          mkClient = pkgs.callPackage ./packages/mkClient.nix { inherit bootstrap; };
+        }
+      );
     };
 }

nix-modpack/lib/default.nix

@@ -1,97 +0,0 @@
-{ nixpkgs, ... }:
-
-let
-  lib = nixpkgs.lib;
-
-  eachSystem =
-    fn: lib.genAttrs lib.systems.flakeExposed (system: fn (import nixpkgs { inherit system; }));
-
-  mkModpack =
-    builder:
-    let
-      mkPackages =
-        pkgs:
-        let
-          bootstrap = pkgs.fetchurl {
-            url = "https://github.com/packwiz/packwiz-installer-bootstrap/releases/download/v0.0.3/packwiz-installer-bootstrap.jar";
-            sha256 = "qPuyTcYEJ46X9GiOgtPZGjGLmO/AjV2/y8vKtkQ9EWw=";
-          };
-
-          buildInfo = builder pkgs.system;
-        in
-        rec {
-          default = server;
-          server = pkgs.writeShellScriptBin "minecraft-server" ''
-            ${lib.getExe pkgs.jre} -jar ${bootstrap} -g -s server ${buildInfo.packUrl}
-            ${buildInfo.server}/bin/minecraft-server
-          '';
-          client = pkgs.stdenvNoCC.mkDerivation {
-            name = "minecraft-client";
-
-            dontUnpack = true;
-
-            mmcpack = ''
-              {
-                "components": [
-                  {
-                    "important": true,
-                    "uid": "net.minecraft",
-                    "version": "${buildInfo.clientGameVersion}"
-                  },
-                  {
-                    "uid": "${buildInfo.clientLoaderUid}",
-                    "version": "${buildInfo.clientLoaderVersion}"
-                  }
-                ],
-                "formatVersion": 1
-              }
-            '';
-
-            instancecfg = pkgs.writeText "instance.cfg" ''
-              [General]
-              ConfigVersion=1.2
-              InstanceType=OneSix
-              OverrideCommands=true
-              PreLaunchCommand=\"$INST_JAVA\" -jar packwiz-installer-bootstrap.jar ${buildInfo.packUrl}
-            '';
-
-            buildPhase = ''
-              # Remove env-vars
-              rm env-vars
-
-              # Add the mmc-pack
-              echo  $mmcpack > ./mmc-pack.json
-
-              # Add the instance-cfg
-              cp $instancecfg ./instance.cfg
-
-              # Add the bootstrap jar
-              mkdir ./minecraft
-              cp ${bootstrap} ./minecraft/packwiz-installer-bootstrap.jar
-
-              # Zip everything together
-              ${pkgs.zip}/bin/zip -r modpack.zip ./*
-            '';
-
-            installPhase = ''
-              mkdir $out
-              mv modpack.zip $out/
-            '';
-          };
-        };
-
-      overlay = final: prev: mkPackages prev;
-    in
-    {
-      inherit overlay;
-      packages = eachSystem mkPackages;
-      devShells = eachSystem (pkgs: {
-        default = pkgs.mkShell {
-          buildInputs = with pkgs; [
-            packwiz
-          ];
-        };
-      });
-    };
-in
-mkModpack

nix-modpack/packages/mkClient.nix

@@ -0,0 +1,67 @@
+{
+  lib,
+  pkgs,
+  bootstrap,
+  ...
+}:
+
+{
+  packUrl,
+  gameVersion,
+  loaderUid,
+  loaderVersion,
+}:
+
+pkgs.stdenvNoCC.mkDerivation {
+  name = "minecraft-client";
+
+  dontUnpack = true;
+
+  mmcpack = ''
+    {
+      "components": [
+        {
+          "important": true,
+          "uid": "net.minecraft",
+          "version": "${gameVersion}"
+        },
+        {
+          "uid": "${loaderUid}",
+          "version": "${loaderVersion}"
+        }
+      ],
+      "formatVersion": 1
+    }
+  '';
+
+  instancecfg = pkgs.writeText "instance.cfg" ''
+    [General]
+    ConfigVersion=1.2
+    InstanceType=OneSix
+    OverrideCommands=true
+    PreLaunchCommand=\"$INST_JAVA\" -jar packwiz-installer-bootstrap.jar ${packUrl}
+  '';
+
+  buildPhase = ''
+    # Remove env-vars
+    rm env-vars
+
+    # Add the mmc-pack
+    echo  $mmcpack > ./mmc-pack.json
+
+    # Add the instance-cfg
+    cp $instancecfg ./instance.cfg
+
+    # Add the bootstrap jar
+    mkdir ./minecraft
+    cp ${bootstrap} ./minecraft/packwiz-installer-bootstrap.jar
+
+    # Zip everything together
+    ${pkgs.zip}/bin/zip -r modpack.zip ./*
+  '';
+
+  installPhase = ''
+    mkdir $out
+    mv modpack.zip $out/
+  '';
+}

nix-modpack/packages/mkServer.nix

@@ -0,0 +1,17 @@
+{
+  lib,
+  pkgs,
+  bootstrap,
+  ...
+}:
+
+{
+  packUrl,
+  server,
+  jre ? pkgs.jre,
+}:
+
+pkgs.writeShellScriptBin "minecraft-server" ''
+  ${lib.getExe jre} -jar ${bootstrap} -g -s server ${packUrl}
+  ${server}/bin/minecraft-server
+''