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stbi/Lib/site-packages/pip/_internal/operations/build/wheel.py

+import logging
+import os
+
+from pip._internal.utils.subprocess import runner_with_spinner_message
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Optional
+    from pip._vendor.pep517.wrappers import Pep517HookCaller
+
+logger = logging.getLogger(__name__)
+
+
+def build_wheel_pep517(
+    name,  # type: str
+    backend,  # type: Pep517HookCaller
+    metadata_directory,  # type: str
+    build_options,  # type: List[str]
+    tempd,  # type: str
+):
+    # type: (...) -> Optional[str]
+    """Build one InstallRequirement using the PEP 517 build process.
+
+    Returns path to wheel if successfully built. Otherwise, returns None.
+    """
+    assert metadata_directory is not None
+    if build_options:
+        # PEP 517 does not support --build-options
+        logger.error('Cannot build wheel for %s using PEP 517 when '
+                     '--build-option is present' % (name,))
+        return None
+    try:
+        logger.debug('Destination directory: %s', tempd)
+
+        runner = runner_with_spinner_message(
+            'Building wheel for {} (PEP 517)'.format(name)
+        )
+        with backend.subprocess_runner(runner):
+            wheel_name = backend.build_wheel(
+                tempd,
+                metadata_directory=metadata_directory,
+            )
+    except Exception:
+        logger.error('Failed building wheel for %s', name)
+        return None
+    return os.path.join(tempd, wheel_name)