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1 | 1 | # node.py - basic nodeid manipulation for mercurial |
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2 | 2 | # |
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3 | 3 | # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com> |
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4 | 4 | # |
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5 | 5 | # This software may be used and distributed according to the terms of the |
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6 | 6 | # GNU General Public License version 2 or any later version. |
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7 | 7 | |
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8 | 8 | from __future__ import absolute_import |
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9 | 9 | |
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10 | 10 | import binascii |
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11 | 11 | |
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12 | 12 | # This ugly style has a noticeable effect in manifest parsing |
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13 | 13 | hex = binascii.hexlify |
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14 | 14 | # Adapt to Python 3 API changes. If this ends up showing up in |
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15 | 15 | # profiles, we can use this version only on Python 3, and forward |
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16 | 16 | # binascii.unhexlify like we used to on Python 2. |
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17 | 17 | def bin(s): |
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18 | 18 | try: |
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19 | 19 | return binascii.unhexlify(s) |
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20 | 20 | except binascii.Error as e: |
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21 | 21 | raise TypeError(e) |
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22 | 22 | |
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23 | 23 | nullrev = -1 |
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24 | # In hex, this is '0000000000000000000000000000000000000000' | |
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24 | 25 | nullid = b"\0" * 20 |
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25 | 26 | nullhex = hex(nullid) |
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26 | 27 | |
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27 | 28 | # Phony node value to stand-in for new files in some uses of |
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28 | 29 | # manifests. |
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29 | newnodeid = '!' * 20 | |
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30 | addednodeid = ('0' * 15) + 'added' | |
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31 | modifiednodeid = ('0' * 12) + 'modified' | |
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30 | # In hex, this is '2121212121212121212121212121212121212121' | |
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31 | newnodeid = '!!!!!!!!!!!!!!!!!!!!' | |
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32 | # In hex, this is '0000000000000000000000000000006164646564' | |
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33 | addednodeid = '000000000000000added' | |
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34 | # In hex, this is '0000000000000000000000006d6f646966696564' | |
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35 | modifiednodeid = '000000000000modified' | |
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32 | 36 | |
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33 | 37 | wdirfilenodeids = {newnodeid, addednodeid, modifiednodeid} |
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34 | 38 | |
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35 | 39 | # pseudo identifiers for working directory |
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36 | 40 | # (they are experimental, so don't add too many dependencies on them) |
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37 | 41 | wdirrev = 0x7fffffff |
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42 | # In hex, this is 'ffffffffffffffffffffffffffffffffffffffff' | |
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38 | 43 | wdirid = b"\xff" * 20 |
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39 | 44 | wdirhex = hex(wdirid) |
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40 | 45 | |
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41 | 46 | def short(node): |
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42 | 47 | return hex(node[:6]) |
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