Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/node.py @ 49413:b5c8524827d2 stable 6.2.2

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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.
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Thu, 01 Sep 2022 15:49:14 +0200
parents 63fd0282ad40
children f4733654f144
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Martin Geisler <mg@lazybytes.net>
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1 # node.py - basic nodeid manipulation for mercurial
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2 #
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3 # Copyright 2005, 2006 Olivia Mackall <olivia@selenic.com>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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8
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9 import binascii
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11 # This ugly style has a noticeable effect in manifest parsing
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12 hex = binascii.hexlify
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13 bin = binascii.unhexlify
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16 def short(node):
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17 return hex(node[:6])
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18
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20 nullrev = -1
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21
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22 # pseudo identifier for working directory
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23 # (experimental, so don't add too many dependencies on it)
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24 wdirrev = 0x7FFFFFFF
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27 class sha1nodeconstants:
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28 nodelen = 20
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29
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30 # In hex, this is '0000000000000000000000000000000000000000'
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31 nullid = b"\0" * nodelen
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32 nullhex = hex(nullid)
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33
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34 # Phony node value to stand-in for new files in some uses of
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35 # manifests.
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36 # In hex, this is '2121212121212121212121212121212121212121'
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37 newnodeid = b'!!!!!!!!!!!!!!!!!!!!'
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38 # In hex, this is '3030303030303030303030303030306164646564'
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39 addednodeid = b'000000000000000added'
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40 # In hex, this is '3030303030303030303030306d6f646966696564'
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41 modifiednodeid = b'000000000000modified'
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42
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43 wdirfilenodeids = {newnodeid, addednodeid, modifiednodeid}
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44
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45 # pseudo identifier for working directory
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46 # (experimental, so don't add too many dependencies on it)
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47 # In hex, this is 'ffffffffffffffffffffffffffffffffffffffff'
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48 wdirid = b"\xff" * nodelen
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49 wdirhex = hex(wdirid)
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51
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52 # legacy starting point for porting modules
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53 nullid = sha1nodeconstants.nullid
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54 nullhex = sha1nodeconstants.nullhex
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55 newnodeid = sha1nodeconstants.newnodeid
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56 addednodeid = sha1nodeconstants.addednodeid
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57 modifiednodeid = sha1nodeconstants.modifiednodeid
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58 wdirfilenodeids = sha1nodeconstants.wdirfilenodeids
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59 wdirid = sha1nodeconstants.wdirid
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60 wdirhex = sha1nodeconstants.wdirhex