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annotate mercurial/phases.py @ 15418:cf729af26963

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phases: basic I/O logic Add function to read and write phase roots. Add a _phaseroots filecache on localrepo class to access the phaseroots data.
author Pierre-Yves David <pierre-yves.david@ens-lyon.org>
date Fri, 04 Nov 2011 00:16:24 +0100
parents 5261140d9322
children ccb7de21625a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # Mercurial phases support code
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2 #
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3 # Copyright 2011 Pierre-Yves David <pierre-yves.david@ens-lyon.org>
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4 # Logilab SA <contact@logilab.fr>
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5 # Augie Fackler <durin42@gmail.com>
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6 #
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7 # This software may be used and distributed according to the terms of the
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8 # GNU General Public License version 2 or any later version.
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9
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10 from node import nullid, bin, hex
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11
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12 allphases = range(2)
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13 trackedphases = allphases[1:]
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14
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15 def readroots(repo):
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16 """Read phase roots from disk"""
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17 roots = [set() for i in allphases]
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18 roots[0].add(nullid)
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19 try:
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20 f = repo.sopener('phaseroots')
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21 try:
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22 for line in f:
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23 phase, nh = line.strip().split()
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24 roots[int(phase)].add(bin(nh))
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25 finally:
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26 f.close()
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27 except IOError:
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28 pass # default value are enough
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29 return roots
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30
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31 def writeroots(repo):
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32 """Write phase roots from disk"""
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33 f = repo.sopener('phaseroots', 'w', atomictemp=True)
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34 try:
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35 for phase, roots in enumerate(repo._phaseroots):
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36 for h in roots:
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37 f.write('%i %s\n' % (phase, hex(h)))
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38 finally:
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39 f.close()