Mercurial > hg
annotate mercurial/node.py @ 46858:85e3a630cad9
revlog: move the details of revlog "v2" index inside revlog.utils.constants
the revlog module is quite large and this kind of format information would handy
for other module. So let us start to gather this information about the format in
a more appropriate place.
We update various reference to this information to use the new "source of truth"
in the process.
Differential Revision: https://phab.mercurial-scm.org/D10305
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Mon, 05 Apr 2021 12:21:12 +0200 |
parents | d4ba4d51f85f |
children | 6000f5b25c9b |
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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 |
10263 | 6 # GNU General Public License version 2 or any later version. |
1089 | 7 |
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8 from __future__ import absolute_import |
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9 |
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10 import binascii |
1089 | 11 |
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12 # This ugly style has a noticeable effect in manifest parsing |
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13 hex = binascii.hexlify |
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14 # Adapt to Python 3 API changes. If this ends up showing up in |
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15 # profiles, we can use this version only on Python 3, and forward |
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16 # binascii.unhexlify like we used to on Python 2. |
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17 def bin(s): |
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18 try: |
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19 return binascii.unhexlify(s) |
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20 except binascii.Error as e: |
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21 raise TypeError(e) |
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22 |
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23 |
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24 def short(node): |
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25 return hex(node[:6]) |
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26 |
1089 | 27 |
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28 nullrev = -1 |
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29 |
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30 # pseudo identifier for working directory |
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31 # (experimental, so don't add too many dependencies on it) |
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32 wdirrev = 0x7FFFFFFF |
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33 |
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34 |
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35 class sha1nodeconstants(object): |
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36 nodelen = 20 |
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37 |
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38 # In hex, this is '0000000000000000000000000000000000000000' |
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39 nullid = b"\0" * nodelen |
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40 nullhex = hex(nullid) |
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41 |
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42 # Phony node value to stand-in for new files in some uses of |
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43 # manifests. |
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44 # In hex, this is '2121212121212121212121212121212121212121' |
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45 newnodeid = b'!!!!!!!!!!!!!!!!!!!!' |
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46 # In hex, this is '3030303030303030303030303030306164646564' |
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47 addednodeid = b'000000000000000added' |
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48 # In hex, this is '3030303030303030303030306d6f646966696564' |
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49 modifiednodeid = b'000000000000modified' |
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50 |
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51 wdirfilenodeids = {newnodeid, addednodeid, modifiednodeid} |
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52 |
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53 # pseudo identifier for working directory |
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54 # (experimental, so don't add too many dependencies on it) |
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55 # In hex, this is 'ffffffffffffffffffffffffffffffffffffffff' |
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56 wdirid = b"\xff" * nodelen |
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57 wdirhex = hex(wdirid) |
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58 |
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59 |
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60 # legacy starting point for porting modules |
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61 nullid = sha1nodeconstants.nullid |
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62 nullhex = sha1nodeconstants.nullhex |
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63 newnodeid = sha1nodeconstants.newnodeid |
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64 addednodeid = sha1nodeconstants.addednodeid |
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65 modifiednodeid = sha1nodeconstants.modifiednodeid |
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66 wdirfilenodeids = sha1nodeconstants.wdirfilenodeids |
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67 wdirid = sha1nodeconstants.wdirid |
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68 wdirhex = sha1nodeconstants.wdirhex |