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try to work around Windows idiocy of open files

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apparently, we may be able to rewrite an open file if we rename it first.

i have no way to test this, unfortunately
This commit is contained in:
Antoine Beaupré 2015-10-17 21:59:51 -04:00
parent e59f1d50d9
commit 8c48015e70
1 changed files with 5 additions and 1 deletions
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6
borg/upgrader.py
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@ -91,10 +91,14 @@ def header_replace(filename, old_magic, new_magic, inplace=True):
# works because our old file handle is still open
# so even though the file is removed, we can still
# read it until the file is closed.
os.unlink(filename)
os.rename(filename, filename + '.tmp')
with open(filename, 'wb') as new_segment:
new_segment.write(new_magic)
new_segment.write(segment.read())
# the little dance with the .tmp file is necessary
# because Windows won't allow overwriting an open
# file.
os.unlink(filename + '.tmp')
def find_attic_keyfile(self):
"""find the attic keyfiles