Add preferWheel option to <derivation>.override

Previously override wasn't really useful as it inherited the args from
buildPythonPackage.
Now we can create custom args for overrides.

mk-poetry-dep.nix

@@ -16,7 +16,13 @@
 , pwd
 , supportedExtensions ? lib.importJSON ./extensions.json
 , ...
-}: let
+}:
+
+pythonPackages.callPackage (
+  { preferWheel ? false
+  }:
+
+    let
 
       inherit (poetryLib) isCompatible getManyLinuxDeps fetchFromPypi;
 
@@ -56,7 +62,9 @@
         sourceDist = builtins.filter isSdist fileCandidates;
         eggs = builtins.filter isEgg fileCandidates;
 
-    lockFileEntry = builtins.head (sourceDist ++ binaryDist ++ eggs);
+        entries = (if preferWheel then binaryDist ++ sourceDist else sourceDist ++ binaryDist);
+
+        lockFileEntry = builtins.head entries;
 
         _isEgg = isEgg lockFileEntry;
 
@@ -76,9 +84,9 @@
 
       baseBuildInputs = lib.optional (name != "setuptools_scm" && name != "setuptools-scm") pythonPackages.setuptools_scm;
 
-in
+    in
 
-buildPythonPackage {
+      buildPythonPackage {
         pname = name;
         version = version;
 
@@ -114,4 +122,6 @@ buildPythonPackage {
           pname = name;
           inherit (fileInfo) file hash kind;
         };
-}
+      }
+
+) {}

overrides.nix

@@ -154,6 +154,11 @@ in
     }
   );
 
+  # Calls Cargo at build time for source builds and is really tricky to package
+  maturin = super.maturin.override {
+    preferWheel = true;
+  };
+
   mccabe = super.mccabe.overrideAttrs (
     old: {
       postPatch = ''

tests/default.nix

@@ -21,6 +21,7 @@ in
   cli = poetry2nix;
   path-deps = pkgs.callPackage ./path-deps { inherit poetry2nix; };
   operators = pkgs.callPackage ./operators { inherit poetry2nix; };
+  preferWheel = pkgs.callPackage ./prefer-wheel { inherit poetry2nix; };
 
   # Egg support not yet in channel, uncomment when channel progressed
   # eggs = pkgs.callPackage ./eggs { inherit poetry2nix; };

tests/prefer-wheel/default.nix

@@ -0,0 +1,20 @@
+{ lib, poetry2nix, python3 }:
+
+poetry2nix.mkPoetryApplication {
+  python = python3;
+  pyproject = ./pyproject.toml;
+  poetrylock = ./poetry.lock;
+  src = lib.cleanSource ./.;
+  overrides = [
+    poetry2nix.defaultPoetryOverrides
+    # This is also in overrides.nix but repeated for completeness
+    (
+      self: super: {
+        maturin = super.maturin.override {
+          preferWheel = true;
+        };
+      }
+    )
+
+  ];
+}

tests/prefer-wheel/poetry.lock

@@ -0,0 +1,37 @@
+[[package]]
+category = "main"
+description = "Build and publish crates with pyo3, rust-cpython and cffi bindings as well as rust binaries as python packages"
+name = "maturin"
+optional = false
+python-versions = ">=3.5"
+version = "0.7.7"
+
+[package.dependencies]
+toml = ">=0.10.0,<0.11.0"
+
+[[package]]
+category = "main"
+description = "Python Library for Tom's Obvious, Minimal Language"
+name = "toml"
+optional = false
+python-versions = "*"
+version = "0.10.0"
+
+[metadata]
+content-hash = "7335d3fa093f70b77439e92fa00ba1c990d37e4515bc588fce2144580db8b504"
+python-versions = "^3.7"
+
+[metadata.files]
+maturin = [
+    {file = "maturin-0.7.7-py2.py3-none-macosx_10_7_x86_64.whl", hash = "sha256:87a3d9a94f9c3b8d3ecc57017cdae2b3f1e0f6bfc851509f0b53c2486f312dcc"},
+    {file = "maturin-0.7.7-py2.py3-none-manylinux1_i686.whl", hash = "sha256:7f7f04de2acf379b1ff8993747f11bfb60760c69caf8c43414212cf7cc4b07ef"},
+    {file = "maturin-0.7.7-py2.py3-none-manylinux1_x86_64.whl", hash = "sha256:aa474d70630833349dac090306fd51a8af2df88080cea74ea4d831b40616ea41"},
+    {file = "maturin-0.7.7-py2.py3-none-win32.whl", hash = "sha256:5e6390245a023cbdca39d9276035fdee4d892b44d3ab798ccf2c3443d87e3f98"},
+    {file = "maturin-0.7.7-py2.py3-none-win_amd64.whl", hash = "sha256:4fd7fcf4e40e984274dc9caf80c08fa16a6c7c1f4ca1f694ba2ac3802b7340aa"},
+    {file = "maturin-0.7.7.tar.gz", hash = "sha256:2533c648aa8fa19f7a9d4f62282b4adce2f9c07c49f512005f92911be767555e"},
+]
+toml = [
+    {file = "toml-0.10.0-py2.7.egg", hash = "sha256:f1db651f9657708513243e61e6cc67d101a39bad662eaa9b5546f789338e07a3"},
+    {file = "toml-0.10.0-py2.py3-none-any.whl", hash = "sha256:235682dd292d5899d361a811df37e04a8828a5b1da3115886b73cf81ebc9100e"},
+    {file = "toml-0.10.0.tar.gz", hash = "sha256:229f81c57791a41d65e399fc06bf0848bab550a9dfd5ed66df18ce5f05e73d5c"},
+]

tests/prefer-wheel/pyproject.toml

@@ -0,0 +1,15 @@
+[tool.poetry]
+name = "test_preferwheel"
+version = "0.1.0"
+description = ""
+authors = ["adisbladis <adisbladis@gmail.com>"]
+
+[tool.poetry.dependencies]
+python = "^3.7"
+maturin = "^0.7.7"
+
+[tool.poetry.dev-dependencies]
+
+[build-system]
+requires = ["poetry>=0.12"]
+build-backend = "poetry.masonry.api"

tests/trivial/default.nix

@@ -5,4 +5,17 @@ poetry2nix.mkPoetryApplication {
   pyproject = ./pyproject.toml;
   poetrylock = ./poetry.lock;
   src = lib.cleanSource ./.;
+
+  overrides = [
+    poetry2nix.defaultPoetryOverrides
+    (
+      self: super: {
+        maturin = (builtins.trace (lib.functionArgs super.maturin.override) super.maturin.override) {
+          preferWheel = true;
+        };
+      }
+    )
+
+  ];
+
 }