PEP-660 support

Signed-off-by: Bernát Gábor <gaborjbernat@gmail.com>

.pre-commit-config.yaml

@@ -17,7 +17,7 @@ repos:
       - id: add-trailing-comma
         args: [--py36-plus]
   - repo: https://github.com/asottile/pyupgrade
-    rev: v2.37.3
+    rev: v2.38.0
     hooks:
       - id: pyupgrade
         args: ["--py37-plus"]
@@ -52,7 +52,7 @@ repos:
     hooks:
       - id: flake8
         additional_dependencies:
-          - flake8-bugbear==22.8.23
+          - flake8-bugbear==22.9.11
           - flake8-comprehensions==3.10
           - flake8-pytest-style==1.6
           - flake8-spellcheck==0.28

pyproject.toml

@@ -1,6 +1,6 @@
 [build-system]
 build-backend = "hatchling.build"
-requires = ["hatchling>=1.8.1", "hatch-vcs>=0.2"]
+requires = ["hatchling>=1.9", "hatch-vcs>=0.2"]
 
 [project]
 name = "tox"
@@ -27,14 +27,14 @@ dependencies = [
   "packaging>=21.3",
   "platformdirs>=2.5.2",
   "pluggy>=1",
-  "pyproject-api>=0.1.1",
-  'tomli>=2.0.1;python_version<"3.11"',
+  "pyproject-api>=1.1.1",
+  'tomli>=2.0.1; python_version < "3.11"',
   "virtualenv>=20.16.5",
   'importlib-metadata>=4.12; python_version < "3.8"',
   'typing-extensions>=4.3; python_version < "3.8"',
 ]
 optional-dependencies.docs = [
-  "furo>=2022.6.21",
+  "furo>=2022.9.15",
   "sphinx>=5.1.1",
   "sphinx-argparse-cli>=1.10",
   "sphinx-autodoc-typehints>=1.19.2",
@@ -46,12 +46,12 @@ optional-dependencies.docs = [
 optional-dependencies.testing = [
   "covdefaults>=2.2",
   "devpi-client>=6.0.1",
-  "devpi-server>=6.6",
+  "devpi-server>=6.6.1",
   "distlib>=0.3.6",
   "filelock>=3.8",
   "flaky>=3.7",
   "hatch-vcs>=0.2",
-  "hatchling>=1.8.1",
+  "hatchling>=1.9",
   "psutil>=5.9.2",
   "pytest>=7.1.3",
   "pytest-cov>=3",

src/tox/tox_env/python/package.py

@@ -43,6 +43,10 @@ class DevLegacyPackage(PythonPathPackageWithDeps):
     """legacy dev package"""
 
 
+class DevPackage(PythonPathPackageWithDeps):
+    """PEP-660 dev package"""
+
+
 class PythonPackageToxEnv(Python, PackageToxEnv, ABC):
     def __init__(self, create_args: ToxEnvCreateArgs) -> None:
         self._wheel_build_envs: dict[str, PythonPackageToxEnv] = {}
@@ -59,7 +63,11 @@ def requires(self) -> tuple[Requirement, ...] | PythonDeps:
 
     def register_run_env(self, run_env: RunToxEnv) -> Generator[tuple[str, str], PackageToxEnv, None]:
         yield from super().register_run_env(run_env)
-        if not isinstance(run_env, Python) or run_env.conf["package"] != "wheel" or "wheel_build_env" in run_env.conf:
+        if (
+            not isinstance(run_env, Python)
+            or run_env.conf["package"] not in {"wheel", "dev"}
+            or "wheel_build_env" in run_env.conf
+        ):
             return
 
         def default_wheel_tag(conf: Config, env_name: str | None) -> str:  # noqa: U100

src/tox/tox_env/python/runner.py

@@ -39,7 +39,7 @@ def register_config(self) -> None:
 
     @property
     def _package_types(self) -> tuple[str, ...]:
-        return "wheel", "sdist", "dev-legacy", "skip", "external"
+        return "wheel", "sdist", "dev", "dev-legacy", "skip", "external"
 
     def _register_package_conf(self) -> bool:
         # provision package type

src/tox/tox_env/python/virtual_env/package/pyproject.py

@@ -128,6 +128,9 @@ def register_run_env(self, run_env: RunToxEnv) -> Generator[tuple[str, str], Pac
 
     def _setup_env(self) -> None:
         super()._setup_env()
+        if "dev" in self.builds:
+            build_requires = self._frontend.get_requires_for_build_editable().requires
+            self.installer.install(build_requires, PythonPackageToxEnv.__name__, "requires_for_build_editable")
         if "wheel" in self.builds:
             build_requires = self._frontend.get_requires_for_build_wheel().requires
             self.installer.install(build_requires, PythonPackageToxEnv.__name__, "requires_for_build_wheel")
@@ -153,21 +156,21 @@ def perform_packaging(self, for_env: EnvConfigSet) -> list[Package]:
         of_type: str = for_env["package"]
         if of_type == "dev-legacy":
             self.setup()
-            deps = [*self.requires(), *self._frontend.get_requires_for_build_sdist().requires] + deps
             package: Package = DevLegacyPackage(self.core["tox_root"], deps)  # the folder itself is the package
         elif of_type == "sdist":
             self.setup()
             with self._pkg_lock:
                 package = SdistPackage(self._frontend.build_sdist(sdist_directory=self.pkg_dir).sdist, deps)
-        elif of_type == "wheel":
+        elif of_type in {"wheel", "dev"}:
             w_env = self._wheel_build_envs.get(for_env["wheel_build_env"])
             if w_env is not None and w_env is not self:
                 with w_env.display_context(self._has_display_suspended):
                     return w_env.perform_packaging(for_env)
             else:
                 self.setup()
                 with self._pkg_lock:
-                    path = self._frontend.build_wheel(
+                    method = "build_editable" if of_type == "dev" else "build_wheel"
+                    path = getattr(self._frontend, method)(
                         wheel_directory=self.pkg_dir,
                         metadata_directory=self.meta_folder,
                         config_settings=self._wheel_config_settings,

tox.ini

@@ -12,6 +12,7 @@ envlist =
     pkg_meta
 isolated_build = true
 skip_missing_interpreters = true
+minversion = 4.0.0b2
 
 [testenv]
 description = run the tests with pytest under {envname}