dirstate-v2: no longer register the data-file during transaction If the data file change during the transaction, we cannot truncate it. The content of the file itself is fine as it will get backed up at the same time as the docket. Leaving the trailing data at the end of failed transaction is fine. The dirstate-v2 format supports it. The dead data will simply we written over if necessary.

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from mercurial.utils import procutil

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# XXX: we should probably offer a devel option to do this in blackbox directly

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def getuser():

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    return b'bob'

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def getpid():

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    return 5000

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# mock the date and user apis so the output is always the same

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def uisetup(ui):

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    procutil.getuser = getuser

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    procutil.getpid = getpid