Use lib.makeScope for consistent package resolution

README.org

@@ -247,7 +247,7 @@ produced by =gradle2nix=. It performs the following:
 
 - =lockFile= :: Path to the lock file generated by =gradle2nix=
   (e.g. =gradle.lock=).
-- =gradlePackage= :: The Gradle package to use. Default is
+- =gradle= :: The Gradle package to use. Default is
   =pkgs.gradle=.
 - =buildJdk= :: Override the default JDK used to run Gradle itself.
 - =fetchers= :: Override functions which fetch dependency

default.nix

@@ -2,62 +2,11 @@
   pkgs ? import <nixpkgs> { },
 }:
 
-with pkgs;
-
 let
-  buildMavenRepo = callPackage ./nix/build-maven-repo.nix { };
-
-  gradleSetupHook = makeSetupHook {
-    name = "gradle-setup-hook";
-    propagatedBuildInputs = [ gradle ];
-  } ./nix/setup-hook.sh;
-
-  buildGradlePackage = callPackage ./nix/build-gradle-package.nix {
-    inherit buildMavenRepo gradleSetupHook;
-  };
-
-  gradle2nix = buildGradlePackage {
-    pname = "gradle2nix";
-    version = "2.0.0";
-    lockFile = ./gradle.lock;
-
-    src = lib.cleanSourceWith {
-      filter = lib.cleanSourceFilter;
-      src = lib.cleanSourceWith {
-        filter =
-          path: type:
-          let
-            baseName = baseNameOf path;
-          in
-          !(
-            (type == "directory" && (baseName == "build" || baseName == ".idea" || baseName == ".gradle"))
-            || (lib.hasSuffix ".iml" baseName)
-          );
-        src = ./.;
-      };
-    };
-
-    gradleInstallFlags = [ ":app:installDist" ];
-
-    postInstall = ''
-      mkdir -p $out/{bin,/lib/gradle2nix}
-      cp -r app/build/install/gradle2nix/* $out/lib/gradle2nix/
-      rm $out/lib/gradle2nix/bin/gradle2nix.bat
-      ln -sf $out/lib/gradle2nix/bin/gradle2nix $out/bin
-    '';
-
-    passthru = {
-      inherit buildGradlePackage buildMavenRepo gradleSetupHook;
-    };
-
-    meta = with lib; {
-      inherit (gradle.meta) platforms;
-      description = "Wrap Gradle builds with Nix";
-      homepage = "https://github.com/tadfisher/gradle2nix";
-      license = licenses.asl20;
-      maintainers = with maintainers; [ tadfisher ];
-      mainProgram = "gradle2nix";
-    };
-  };
+  scope = pkgs.callPackage ./nix { };
 in
-gradle2nix
+scope.gradle2nix.overrideAttrs (attrs: {
+  passthru = (attrs.passthru or { }) // {
+    inherit (scope) buildGradlePackage buildMavenRepo gradleSetupHook;
+  };
+})

flake.nix

@@ -17,27 +17,26 @@
       system:
       let
         pkgs = nixpkgs.legacyPackages.${system};
+        scope = pkgs.callPackage ./nix { };
         inherit (nixpkgs) lib;
       in
       {
         builders = {
-          inherit (self.packages.${system}.gradle2nix) buildGradlePackage buildMavenRepo;
+          inherit (scope) buildGradlePackage buildMavenRepo;
           default = self.packages.${system}.buildGradlePackage;
         };
 
         packages = {
-          inherit (self.packages.${system}.gradle2nix) gradleSetupHook;
-          gradle2nix = pkgs.callPackage ./default.nix { };
+          inherit (scope) gradle2nix gradleSetupHook;
           default = self.packages.${system}.gradle2nix;
         };
 
-        apps = rec {
+        apps = {
           gradle2nix = {
             type = "app";
-            program = lib.getExe self.packages.${system}.default;
+            program = lib.getExe self.packages.${system}.gradle2nix;
           };
-
-          default = gradle2nix;
+          default = self.apps.${system}.gradle2nix;
         };
 
         formatter = pkgs.writeShellScriptBin "gradle2nix-fmt" ''

nix/build-gradle-package.nix

@@ -1,28 +1,6 @@
-# This file is generated by gradle2nix.
-#
-# Example usage (e.g. in default.nix):
-#
-#     with (import <nixpkgs> {});
-#     let
-#       buildGradle = callPackage ./gradle.nix {};
-#     in
-#       buildGradle {
-#         lockFile = ./gradle.lock;
-#
-#         src = ./.;
-#
-#         gradleFlags = [ "installDist" ];
-#
-#         installPhase = ''
-#           mkdir -p $out
-#           cp -r app/build/install/myproject $out
-#         '';
-#       }
-
 {
   lib,
   stdenv,
-  gradle,
   buildMavenRepo,
   gradleSetupHook,
   writeText,
@@ -31,10 +9,8 @@
 {
   # Path to the lockfile generated by gradle2nix (e.g. gradle.lock).
   lockFile ? null,
-  pname ? "project",
-  version ? null,
   # The Gradle package to use. Default is 'pkgs.gradle'.
-  gradlePackage ? gradle,
+  gradle ? null,
   # Override the default JDK used to run Gradle itself.
   buildJdk ? null,
   # Override functions which fetch dependency artifacts.
@@ -105,24 +81,25 @@
 let
   inherit (builtins) removeAttrs;
 
-  gradleSetupHook' = gradleSetupHook.overrideAttrs (_: {
-    propagatedBuildInputs = [ gradlePackage ];
-  });
-
   offlineRepo =
     if lockFile != null then buildMavenRepo { inherit lockFile fetchers overrides; } else null;
 
   buildGradlePackage = stdenv.mkDerivation (
     finalAttrs:
     {
-
-      inherit buildJdk pname version;
+      inherit buildJdk gradle;
 
       inherit (offlineRepo) gradleInitScript;
 
       dontStrip = true;
 
-      nativeBuildInputs = (args.nativeBuildInputs or [ ]) ++ [ gradleSetupHook' ];
+      gradleSetupHook =
+        if (finalAttrs.gradle != null) then
+          gradleSetupHook.override { inherit (finalAttrs) gradle; }
+        else
+          gradleSetupHook;
+
+      nativeBuildInputs = (args.nativeBuildInputs or [ ]) ++ [ finalAttrs.gradleSetupHook ];
 
       gradleFlags =
         [ "--console=plain" ]
@@ -137,7 +114,7 @@ let
       "lockFile"
       "fetchers"
       "nativeBuildInputs"
-      "overlays"
+      "overrides"
       "passthru"
     ]
   );

nix/default.nix

@@ -0,0 +1,15 @@
+{
+  lib,
+  gradle,
+  newScope,
+}:
+
+lib.makeScope newScope (
+  self: with self; {
+    inherit gradle;
+    buildGradlePackage = callPackage ./build-gradle-package.nix { };
+    buildMavenRepo = callPackage ./build-maven-repo.nix { };
+    gradleSetupHook = callPackage ./gradle-setup-hook.nix { };
+    gradle2nix = callPackage ./gradle2nix.nix { };
+  }
+)

nix/gradle-setup-hook.nix

@@ -0,0 +1,7 @@
+{ makeSetupHook, gradle }:
+
+makeSetupHook {
+  name = "gradle-setup-hook";
+  propagatedBuildInputs = [ gradle ];
+  passthru.gradle = gradle;
+} ./setup-hook.sh

nix/gradle2nix.nix

@@ -0,0 +1,51 @@
+{
+  lib,
+  buildGradlePackage,
+  buildMavenRepo,
+  gradle,
+  gradleSetupHook,
+}:
+
+buildGradlePackage {
+  pname = "gradle2nix";
+  version = "2.0.0";
+  lockFile = ../gradle.lock;
+
+  src = lib.cleanSourceWith {
+    filter = lib.cleanSourceFilter;
+    src = lib.cleanSourceWith {
+      filter =
+        path: type:
+        let
+          baseName = baseNameOf path;
+        in
+        !(
+          (type == "directory" && (baseName == "build" || baseName == ".idea" || baseName == ".gradle"))
+          || (lib.hasSuffix ".iml" baseName)
+        );
+      src = ../.;
+    };
+  };
+
+  gradleInstallFlags = [ ":app:installDist" ];
+
+  postInstall = ''
+    mkdir -p $out/{bin,/lib/gradle2nix}
+    cp -r app/build/install/gradle2nix/* $out/lib/gradle2nix/
+    rm $out/lib/gradle2nix/bin/gradle2nix.bat
+    ln -sf $out/lib/gradle2nix/bin/gradle2nix $out/bin
+  '';
+
+  passthru = {
+    inherit buildGradlePackage buildMavenRepo gradleSetupHook;
+  };
+
+  meta = with lib; {
+    inherit (gradle.meta) platforms;
+    description = "Wrap Gradle builds with Nix";
+    homepage = "https://github.com/tadfisher/gradle2nix";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ tadfisher ];
+    mainProgram = "gradle2nix";
+  };
+}