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67 lines
2.5 KiB
Python
67 lines
2.5 KiB
Python
# lamosity needed to make things reliable on Windows :-(
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# (borrowed from Python's test_support.py)
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import errno
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import os
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import shutil
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import sys
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import time
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import warnings
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if sys.platform.startswith("win"): # pragma: no cover
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def _waitfor(func, pathname, waitall=False):
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# Perform the operation
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func(pathname)
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# Now setup the wait loop
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if waitall:
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dirname = pathname
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else:
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dirname, name = os.path.split(pathname)
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dirname = dirname or '.'
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# Check for `pathname` to be removed from the filesystem.
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# The exponential backoff of the timeout amounts to a total
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# of ~1 second after which the deletion is probably an error
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# anyway.
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# Testing on a i7@4.3GHz shows that usually only 1 iteration is
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# required when contention occurs.
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timeout = 0.001
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while timeout < 1.0: # pragma: no branch
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# Note we are only testing for the existence of the file(s) in
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# the contents of the directory regardless of any security or
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# access rights. If we have made it this far, we have sufficient
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# permissions to do that much using Python's equivalent of the
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# Windows API FindFirstFile.
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# Other Windows APIs can fail or give incorrect results when
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# dealing with files that are pending deletion.
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L = os.listdir(dirname)
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if not (L if waitall else name in L): # pragma: no branch
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return
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# Increase the timeout and try again
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time.sleep(timeout) # pragma: no cover
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timeout *= 2 # pragma: no cover
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warnings.warn('tests may fail, delete still pending for '
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+ pathname, # pragma: no cover
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RuntimeWarning, stacklevel=4)
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def _rmtree(path):
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def _rmtree_inner(path):
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for name in os.listdir(path):
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fullname = os.path.join(path, name)
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if os.path.isdir(fullname):
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_waitfor(_rmtree_inner, fullname, waitall=True)
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os.rmdir(fullname)
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else:
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os.unlink(fullname)
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_waitfor(_rmtree_inner, path, waitall=True)
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_waitfor(os.rmdir, path)
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else:
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_rmtree = shutil.rmtree
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def rmtree(path):
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try:
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_rmtree(path)
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except OSError as e: # pragma: no cover
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# Unix returns ENOENT, Windows returns ESRCH.
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if e.errno not in (errno.ENOENT, errno.ESRCH): # pragma: no branch
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raise
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