fix: disallow the wheel package to preferWheels

Otherwise an infinite recursion error occurs.

mk-poetry-dep.nix

@@ -62,6 +62,8 @@ pythonPackages.callPackage
               inherit pythonPackages pyProject;
             } else [ ];
 
+      pname = normalizePackageName name;
+      preferWheel' = preferWheel && pname != "wheel";
       fileInfo =
         let
           isBdist = f: lib.strings.hasSuffix "whl" f.file;
@@ -70,7 +72,9 @@ pythonPackages.callPackage
           binaryDist = selectWheel fileCandidates;
           sourceDist = builtins.filter isSdist fileCandidates;
           eggs = builtins.filter isEgg fileCandidates;
-          entries = (if preferWheel then binaryDist ++ sourceDist else sourceDist ++ binaryDist) ++ eggs;
+          # the `wheel` package cannot be built from a wheel, since that requires the wheel package
+          # this causes a circular dependency so we special-case ignore its `preferWheel` attribute value
+          entries = (if preferWheel' then binaryDist ++ sourceDist else sourceDist ++ binaryDist) ++ eggs;
           lockFileEntry = (
             if lib.length entries > 0 then builtins.head entries
             else throw "Missing suitable source/wheel file entry for ${name}"
@@ -95,8 +99,7 @@ pythonPackages.callPackage
       hooks = python.pkgs.callPackage ./hooks { };
     in
     buildPythonPackage {
-      pname = normalizePackageName name;
-      version = version;
+      inherit pname version;
 
       # Circumvent output separation (https://github.com/NixOS/nixpkgs/pull/190487)
       format = if format == "pyproject" then "poetry2nix" else format;
@@ -158,6 +161,7 @@ pythonPackages.callPackage
 
       passthru = {
         inherit args;
+        preferWheel = preferWheel';
       };
 
       # We need to retrieve kind from the interpreter and the filename of the package

tests/default.nix

@@ -144,5 +144,6 @@ builtins.removeAttrs
   test-extras = callTest ./test-extras { };
   test-no-extras = callTest ./test-no-extras { };
   missing-iswheel = callTest ./missing-iswheel { };
+  wheel-wheel = callTest ./wheel-wheel { };
 }
   skipTests

tests/wheel-wheel/default.nix

@@ -0,0 +1,13 @@
+{ lib, poetry2nix, python3, runCommand }:
+let
+  env = poetry2nix.mkPoetryEnv {
+    python = python3;
+    pyproject = ./pyproject.toml;
+    poetrylock = ./poetry.lock;
+    preferWheels = true;
+  };
+  isWheelWheel = env.python.pkgs.wheel.src.isWheel;
+in
+assert (!isWheelWheel); runCommand "wheel-wheel-test" { } ''
+  ${env}/bin/python -c 'import wheel; print(wheel.__version__)' > $out
+''

tests/wheel-wheel/poetry.lock

@@ -0,0 +1,21 @@
+# This file is automatically @generated by Poetry and should not be changed by hand.
+
+[[package]]
+name = "wheel"
+version = "0.38.4"
+description = "A built-package format for Python"
+category = "main"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "wheel-0.38.4-py3-none-any.whl", hash = "sha256:b60533f3f5d530e971d6737ca6d58681ee434818fab630c83a734bb10c083ce8"},
+    {file = "wheel-0.38.4.tar.gz", hash = "sha256:965f5259b566725405b05e7cf774052044b1ed30119b5d586b2703aafe8719ac"},
+]
+
+[package.extras]
+test = ["pytest (>=3.0.0)"]
+
+[metadata]
+lock-version = "2.0"
+python-versions = "^3.9"
+content-hash = "30c70d03c6714b9b24b7684eb669096a9efaaadff29fbb8e811d92f4a990853f"

tests/wheel-wheel/pyproject.toml

@@ -0,0 +1,13 @@
+[tool.poetry]
+name = "test-wheel-wheel"
+version = "0.1.0"
+description = "Test of python wheel-wheel package"
+authors = ["Your Name <you@example.com>"]
+
+[tool.poetry.dependencies]
+python = "^3.9"
+wheel = "^0.38.4"
+
+[build-system]
+requires = ["poetry-core>=1"]
+build-backend = "poetry.core.masonry.api"