Add _supported_hooks

pep517/in_process/_in_process.py

@@ -103,6 +103,19 @@ def _build_backend():
  return obj
 
 
+def _supported_hooks():
+ """Invoke the _supported_hooks pseudo hook.
+ 
+ Returns a list of strings.
+ """
+ backend = _build_backend()
+ return [
+ hook_name
+ for hook_name in sorted(HOOK_NAMES)
+ if hook_name != "_supported_hooks" and hasattr(backend, hook_name)
+ ]
+
+
 def get_requires_for_build_wheel(config_settings):
  """Invoke the optional get_requires_for_build_wheel hook
 
@@ -312,6 +325,7 @@ def build_sdist(sdist_directory, config_settings):
  'build_editable',
  'get_requires_for_build_sdist',
  'build_sdist',
+ '_supported_hooks',
 }
 
 

pep517/wrappers.py

@@ -154,6 +154,9 @@ def subprocess_runner(self, runner):
  finally:
  self._subprocess_runner = prev
 
+ def _supported_hooks(self):
+ return self._call_hook('_supported_hooks', {})
+
  def get_requires_for_build_wheel(self, config_settings=None):
  """Identify packages required for building a wheel
 

tests/test_call_hooks.py

@@ -211,3 +211,27 @@ def test_setup_py():
  # Some versions of setuptools list setuptools itself here
  res = [x for x in res if x != 'setuptools']
  assert res == ['wheel']
+
+
+@pytest.mark.parametrize(
+ ("pkg", "expected"),
+ [
+ ("pkg1", [
+ "build_editable",
+ "build_sdist",
+ "build_wheel",
+ "get_requires_for_build_editable",
+ "get_requires_for_build_sdist",
+ "get_requires_for_build_wheel",
+ "prepare_metadata_for_build_editable",
+ "prepare_metadata_for_build_wheel",
+ ]),
+ ("pkg2", ["build_sdist", "build_wheel"]),
+ ("pkg3", ["build_editable", "build_sdist", "build_wheel"]),
+ ],
+)
+def test__supported_hooks(pkg, expected):
+ hooks = get_hooks(pkg)
+ with modified_env({"PYTHONPATH": BUILDSYS_PKGS}):
+ res = hooks._supported_hooks()
+ assert res == expected