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annotate mercurial/transaction.py @ 23247:def27d46a9a8

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transaction: drop the third item in `tr.backupentries` This third item is always None and never used.
author Pierre-Yves David <pierre-yves.david@fb.com>
date Wed, 05 Nov 2014 01:33:16 +0000
parents 3f543f6be500
children e754b62373ad
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rev   line source
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Mads Kiilerich <mads@kiilerich.com>
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1 # transaction.py - simple journaling scheme for mercurial
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2 #
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3 # This transaction scheme is intended to gracefully handle program
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4 # errors and interruptions. More serious failures like system crashes
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5 # can be recovered with an fsck-like tool. As the whole repository is
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6 # effectively log-structured, this should amount to simply truncating
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7 # anything that isn't referenced in the changelog.
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8 #
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Vadim Gelfer <vadim.gelfer@gmail.com>
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9 # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
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10 #
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11 # This software may be used and distributed according to the terms of the
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12 # GNU General Public License version 2 or any later version.
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13
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14 from i18n import _
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15 import errno
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16 import error, util
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17
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18 version = 1
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19
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20 def active(func):
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21 def _active(self, *args, **kwds):
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22 if self.count == 0:
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23 raise error.Abort(_(
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24 'cannot use transaction when it is already committed/aborted'))
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25 return func(self, *args, **kwds)
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26 return _active
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27
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28 def _playback(journal, report, opener, entries, backupentries, unlink=True):
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29 for f, o, _ignore in entries:
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30 if o or not unlink:
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31 try:
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Dan Villiom Podlaski Christiansen <danchr@gmail.com>
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32 fp = opener(f, 'a')
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33 fp.truncate(o)
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34 fp.close()
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35 except IOError:
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36 report(_("failed to truncate %s\n") % f)
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37 raise
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38 else:
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39 try:
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40 opener.unlink(f)
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41 except (IOError, OSError), inst:
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42 if inst.errno != errno.ENOENT:
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43 raise
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44
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45 backupfiles = []
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46 for f, b in backupentries:
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47 filepath = opener.join(f)
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48 backuppath = opener.join(b)
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49 try:
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50 util.copyfile(backuppath, filepath)
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51 backupfiles.append(b)
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52 except IOError:
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53 report(_("failed to recover %s\n") % f)
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54 raise
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55
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56 opener.unlink(journal)
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57 backuppath = "%s.backupfiles" % journal
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58 if opener.exists(backuppath):
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59 opener.unlink(backuppath)
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60 for f in backupfiles:
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61 opener.unlink(f)
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62
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63 class transaction(object):
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64 def __init__(self, report, opener, journal, after=None, createmode=None,
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65 onclose=None, onabort=None):
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66 """Begin a new transaction
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67
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68 Begins a new transaction that allows rolling back writes in the event of
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69 an exception.
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70
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71 * `after`: called after the transaction has been committed
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72 * `createmode`: the mode of the journal file that will be created
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73 * `onclose`: called as the transaction is closing, but before it is
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74 closed
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75 * `onabort`: called as the transaction is aborting, but before any files
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76 have been truncated
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77 """
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78 self.count = 1
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79 self.usages = 1
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80 self.report = report
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81 self.opener = opener
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82 self.after = after
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83 self.onclose = onclose
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84 self.onabort = onabort
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85 self.entries = []
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86 self.backupentries = []
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87 self.map = {}
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88 self.backupmap = {}
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89 self.journal = journal
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90 self._queue = []
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91 # a dict of arguments to be passed to hooks
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92 self.hookargs = {}
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93
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94 self.backupjournal = "%s.backupfiles" % journal
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95 self.file = opener.open(self.journal, "w")
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96 self.backupsfile = opener.open(self.backupjournal, 'w')
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97 self.backupsfile.write('%d\n' % version)
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98 if createmode is not None:
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99 opener.chmod(self.journal, createmode & 0666)
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100 opener.chmod(self.backupjournal, createmode & 0666)
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101
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102 # hold file generations to be performed on commit
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103 self._filegenerators = {}
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104 # hold callbalk to write pending data for hooks
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105 self._pendingcallback = {}
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106 # True is any pending data have been written ever
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107 self._anypending = False
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108 # holds callback to call when writing the transaction
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109 self._finalizecallback = {}
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110 # hold callbalk for post transaction close
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111 self._postclosecallback = {}
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112
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113 def __del__(self):
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114 if self.journal:
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115 self._abort()
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116
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117 @active
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118 def startgroup(self):
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119 self._queue.append(([], []))
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120
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121 @active
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122 def endgroup(self):
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123 q = self._queue.pop()
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124 self.entries.extend(q[0])
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125 self.backupentries.extend(q[1])
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126
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127 offsets = []
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128 backups = []
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129 for f, o, _data in q[0]:
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130 offsets.append((f, o))
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131
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132 for f, b in q[1]:
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133 backups.append((f, b))
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134
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135 d = ''.join(['%s\0%d\n' % (f, o) for f, o in offsets])
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136 self.file.write(d)
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137 self.file.flush()
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138
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139 d = ''.join(['%s\0%s\n' % (f, b) for f, b in backups])
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140 self.backupsfile.write(d)
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141 self.backupsfile.flush()
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142
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143 @active
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144 def add(self, file, offset, data=None):
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145 if file in self.map or file in self.backupmap:
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diff changeset
146 return
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diff changeset
147 if self._queue:
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148 self._queue[-1][0].append((file, offset, data))
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diff changeset
149 return
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150
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151 self.entries.append((file, offset, data))
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152 self.map[file] = len(self.entries) - 1
0
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153 # add enough data to the journal to do the truncate
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154 self.file.write("%s\0%d\n" % (file, offset))
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155 self.file.flush()
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156
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157 @active
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158 def addbackup(self, file, hardlink=True, vfs=None):
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159 """Adds a backup of the file to the transaction
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160
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161 Calling addbackup() creates a hardlink backup of the specified file
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162 that is used to recover the file in the event of the transaction
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163 aborting.
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164
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165 * `file`: the file path, relative to .hg/store
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166 * `hardlink`: use a hardlink to quickly create the backup
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167 """
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168
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169 if file in self.map or file in self.backupmap:
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170 return
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diff changeset
171 backupfile = "%s.backup.%s" % (self.journal, file)
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172 if vfs is None:
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173 vfs = self.opener
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174 if vfs.exists(file):
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175 filepath = vfs.join(file)
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176 backuppath = self.opener.join(backupfile)
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177 util.copyfiles(filepath, backuppath, hardlink=hardlink)
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178 else:
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179 self.add(file, 0)
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180 return
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181
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diff changeset
182 if self._queue:
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183 self._queue[-1][1].append((file, backupfile))
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184 return
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185
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diff changeset
186 self.backupentries.append((file, backupfile))
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diff changeset
187 self.backupmap[file] = len(self.backupentries) - 1
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188 self.backupsfile.write("%s\0%s\n" % (file, backupfile))
20882
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diff changeset
189 self.backupsfile.flush()
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190
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diff changeset
191 @active
22663
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192 def addfilegenerator(self, genid, filenames, genfunc, order=0, vfs=None):
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193 """add a function to generates some files at transaction commit
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194
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195 The `genfunc` argument is a function capable of generating proper
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diff changeset
196 content of each entry in the `filename` tuple.
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diff changeset
197
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diff changeset
198 At transaction close time, `genfunc` will be called with one file
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diff changeset
199 object argument per entries in `filenames`.
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diff changeset
200
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diff changeset
201 The transaction itself is responsible for the backup, creation and
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parents: 22077
diff changeset
202 final write of such file.
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diff changeset
203
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diff changeset
204 The `genid` argument is used to ensure the same set of file is only
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diff changeset
205 generated once. Call to `addfilegenerator` for a `genid` already
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diff changeset
206 present will overwrite the old entry.
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diff changeset
207
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diff changeset
208 The `order` argument may be used to control the order in which multiple
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diff changeset
209 generator will be executed.
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diff changeset
210 """
22663
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211 # For now, we are unable to do proper backup and restore of custom vfs
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diff changeset
212 # but for bookmarks that are handled outside this mechanism.
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diff changeset
213 assert vfs is None or filenames == ('bookmarks',)
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diff changeset
214 self._filegenerators[genid] = (order, filenames, genfunc, vfs)
22078
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diff changeset
215
23102
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diff changeset
216 def _generatefiles(self):
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diff changeset
217 # write files registered for generation
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diff changeset
218 for entry in sorted(self._filegenerators.values()):
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parents: 23065
diff changeset
219 order, filenames, genfunc, vfs = entry
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diff changeset
220 if vfs is None:
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parents: 23065
diff changeset
221 vfs = self.opener
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diff changeset
222 files = []
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diff changeset
223 try:
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diff changeset
224 for name in filenames:
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diff changeset
225 # Some files are already backed up when creating the
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parents: 23065
diff changeset
226 # localrepo. Until this is properly fixed we disable the
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parents: 23065
diff changeset
227 # backup for them.
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parents: 23065
diff changeset
228 if name not in ('phaseroots', 'bookmarks'):
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parents: 23065
diff changeset
229 self.addbackup(name)
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diff changeset
230 files.append(vfs(name, 'w', atomictemp=True))
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parents: 23065
diff changeset
231 genfunc(*files)
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parents: 23065
diff changeset
232 finally:
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parents: 23065
diff changeset
233 for f in files:
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parents: 23065
diff changeset
234 f.close()
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diff changeset
235
22078
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diff changeset
236 @active
2084
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diff changeset
237 def find(self, file):
Chris Mason <mason@suse.com>
parents: 1806
diff changeset
238 if file in self.map:
Chris Mason <mason@suse.com>
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diff changeset
239 return self.entries[self.map[file]]
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diff changeset
240 if file in self.backupmap:
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diff changeset
241 return self.backupentries[self.backupmap[file]]
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diff changeset
242 return None
Chris Mason <mason@suse.com>
parents: 1806
diff changeset
243
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diff changeset
244 @active
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diff changeset
245 def replace(self, file, offset, data=None):
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diff changeset
246 '''
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diff changeset
247 replace can only replace already committed entries
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diff changeset
248 that are not pending in the queue
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diff changeset
249 '''
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parents: 8294
diff changeset
250
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diff changeset
251 if file not in self.map:
Chris Mason <mason@suse.com>
parents: 1806
diff changeset
252 raise KeyError(file)
Chris Mason <mason@suse.com>
parents: 1806
diff changeset
253 index = self.map[file]
Chris Mason <mason@suse.com>
parents: 1806
diff changeset
254 self.entries[index] = (file, offset, data)
Chris Mason <mason@suse.com>
parents: 1806
diff changeset
255 self.file.write("%s\0%d\n" % (file, offset))
Chris Mason <mason@suse.com>
parents: 1806
diff changeset
256 self.file.flush()
Chris Mason <mason@suse.com>
parents: 1806
diff changeset
257
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diff changeset
258 @active
1806
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parents: 1559
diff changeset
259 def nest(self):
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parents: 1559
diff changeset
260 self.count += 1
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parents: 10282
diff changeset
261 self.usages += 1
1806
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diff changeset
262 return self
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diff changeset
263
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parents: 10282
diff changeset
264 def release(self):
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parents: 10282
diff changeset
265 if self.count > 0:
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diff changeset
266 self.usages -= 1
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diff changeset
267 # if the transaction scopes are left without being closed, fail
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diff changeset
268 if self.count > 0 and self.usages == 0:
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parents: 10282
diff changeset
269 self._abort()
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diff changeset
270
1806
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diff changeset
271 def running(self):
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diff changeset
272 return self.count > 0
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diff changeset
273
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diff changeset
274 def addpending(self, category, callback):
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diff changeset
275 """add a callback to be called when the transaction is pending
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diff changeset
276
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diff changeset
277 Category is a unique identifier to allow overwriting an old callback
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diff changeset
278 with a newer callback.
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diff changeset
279 """
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diff changeset
280 self._pendingcallback[category] = callback
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diff changeset
281
ea5af863fbff transaction: add 'writepending' logic
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23103
diff changeset
282 @active
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Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23103
diff changeset
283 def writepending(self):
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Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23103
diff changeset
284 '''write pending file to temporary version
ea5af863fbff transaction: add 'writepending' logic
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23103
diff changeset
285
ea5af863fbff transaction: add 'writepending' logic
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23103
diff changeset
286 This is used to allow hooks to view a transaction before commit'''
ea5af863fbff transaction: add 'writepending' logic
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23103
diff changeset
287 categories = sorted(self._pendingcallback)
ea5af863fbff transaction: add 'writepending' logic
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23103
diff changeset
288 for cat in categories:
ea5af863fbff transaction: add 'writepending' logic
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23103
diff changeset
289 # remove callback since the data will have been flushed
ea5af863fbff transaction: add 'writepending' logic
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23103
diff changeset
290 any = self._pendingcallback.pop(cat)()
ea5af863fbff transaction: add 'writepending' logic
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23103
diff changeset
291 self._anypending = self._anypending or any
ea5af863fbff transaction: add 'writepending' logic
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23103
diff changeset
292 return self._anypending
ea5af863fbff transaction: add 'writepending' logic
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23103
diff changeset
293
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parents: 8225
diff changeset
294 @active
23204
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Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23202
diff changeset
295 def addfinalize(self, category, callback):
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Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23202
diff changeset
296 """add a callback to be called when the transaction is closed
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Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23202
diff changeset
297
10beda5bd2b7 transaction: allow registering a finalization callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23202
diff changeset
298 Category is a unique identifier to allow overwriting old callbacks with
10beda5bd2b7 transaction: allow registering a finalization callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23202
diff changeset
299 newer callbacks.
10beda5bd2b7 transaction: allow registering a finalization callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23202
diff changeset
300 """
10beda5bd2b7 transaction: allow registering a finalization callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23202
diff changeset
301 self._finalizecallback[category] = callback
10beda5bd2b7 transaction: allow registering a finalization callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23202
diff changeset
302
10beda5bd2b7 transaction: allow registering a finalization callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23202
diff changeset
303 @active
23220
3f543f6be500 transaction: allow registering a post-close callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23204
diff changeset
304 def addpostclose(self, category, callback):
3f543f6be500 transaction: allow registering a post-close callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23204
diff changeset
305 """add a callback to be called after the transaction is closed
3f543f6be500 transaction: allow registering a post-close callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23204
diff changeset
306
3f543f6be500 transaction: allow registering a post-close callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23204
diff changeset
307 Category is a unique identifier to allow overwriting an old callback
3f543f6be500 transaction: allow registering a post-close callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23204
diff changeset
308 with a newer callback.
3f543f6be500 transaction: allow registering a post-close callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23204
diff changeset
309 """
3f543f6be500 transaction: allow registering a post-close callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23204
diff changeset
310 self._postclosecallback[category] = callback
3f543f6be500 transaction: allow registering a post-close callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23204
diff changeset
311
3f543f6be500 transaction: allow registering a post-close callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23204
diff changeset
312 @active
0
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parents:
diff changeset
313 def close(self):
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Greg Ward <greg-hg@gerg.ca>
parents: 9094
diff changeset
314 '''commit the transaction'''
20881
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic
Durham Goode <durham@fb.com>
parents: 20524
diff changeset
315 if self.count == 1 and self.onclose is not None:
23103
29bfa964d6d8 transaction: only generate file when we actually close the transaction
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23102
diff changeset
316 self._generatefiles()
23204
10beda5bd2b7 transaction: allow registering a finalization callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23202
diff changeset
317 categories = sorted(self._finalizecallback)
10beda5bd2b7 transaction: allow registering a finalization callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23202
diff changeset
318 for cat in categories:
10beda5bd2b7 transaction: allow registering a finalization callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23202
diff changeset
319 self._finalizecallback[cat]()
20881
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Durham Goode <durham@fb.com>
parents: 20524
diff changeset
320 self.onclose()
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic
Durham Goode <durham@fb.com>
parents: 20524
diff changeset
321
1806
a2c69737e65e Automatic nesting into running transactions in the same repository.
mason@suse.com
parents: 1559
diff changeset
322 self.count -= 1
a2c69737e65e Automatic nesting into running transactions in the same repository.
mason@suse.com
parents: 1559
diff changeset
323 if self.count != 0:
a2c69737e65e Automatic nesting into running transactions in the same repository.
mason@suse.com
parents: 1559
diff changeset
324 return
0
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mpm@selenic.com
parents:
diff changeset
325 self.file.close()
21206
c77418938d05 transaction: fix file descriptor leak for journal.backupfiles
Durham Goode <durham@fb.com>
parents: 21150
diff changeset
326 self.backupsfile.close()
0
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parents:
diff changeset
327 self.entries = []
95
589f507bb259 Beginnings of transaction undo support
mpm@selenic.com
parents: 43
diff changeset
328 if self.after:
785
46a8dd3145cc Fix undo after aborted commit bug
mpm@selenic.com
parents: 582
diff changeset
329 self.after()
20087
cf3b8285af00 transaction: take journal file path relative to vfs to use file API via vfs
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 20084
diff changeset
330 if self.opener.isfile(self.journal):
cf3b8285af00 transaction: take journal file path relative to vfs to use file API via vfs
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 20084
diff changeset
331 self.opener.unlink(self.journal)
20882
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
332 if self.opener.isfile(self.backupjournal):
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
333 self.opener.unlink(self.backupjournal)
23247
def27d46a9a8 transaction: drop the third item in `tr.backupentries`
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23220
diff changeset
334 for _f, b in self.backupentries:
20882
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
335 self.opener.unlink(b)
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parents: 20881
diff changeset
336 self.backupentries = []
573
fbfbd4e506c3 transaction: nullify journal after close()
mpm@selenic.com
parents: 558
diff changeset
337 self.journal = None
23220
3f543f6be500 transaction: allow registering a post-close callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23204
diff changeset
338 # run post close action
3f543f6be500 transaction: allow registering a post-close callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23204
diff changeset
339 categories = sorted(self._postclosecallback)
3f543f6be500 transaction: allow registering a post-close callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23204
diff changeset
340 for cat in categories:
3f543f6be500 transaction: allow registering a post-close callback
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23204
diff changeset
341 self._postclosecallback[cat]()
0
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parents:
diff changeset
342
8289
fe8a3e56039f transaction: ensure finished transactions are not reused
Henrik Stuart <hg@hstuart.dk>
parents: 8225
diff changeset
343 @active
0
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mpm@selenic.com
parents:
diff changeset
344 def abort(self):
9220
8a4da1388553 transaction: document close(), abort() methods
Greg Ward <greg-hg@gerg.ca>
parents: 9094
diff changeset
345 '''abort the transaction (generally called on error, or when the
8a4da1388553 transaction: document close(), abort() methods
Greg Ward <greg-hg@gerg.ca>
parents: 9094
diff changeset
346 transaction is not explicitly committed before going out of
8a4da1388553 transaction: document close(), abort() methods
Greg Ward <greg-hg@gerg.ca>
parents: 9094
diff changeset
347 scope)'''
8289
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Henrik Stuart <hg@hstuart.dk>
parents: 8225
diff changeset
348 self._abort()
fe8a3e56039f transaction: ensure finished transactions are not reused
Henrik Stuart <hg@hstuart.dk>
parents: 8225
diff changeset
349
fe8a3e56039f transaction: ensure finished transactions are not reused
Henrik Stuart <hg@hstuart.dk>
parents: 8225
diff changeset
350 def _abort(self):
8290
560af1bbfd6e transaction: reset transaction on abort
Henrik Stuart <hg@hstuart.dk>
parents: 8289
diff changeset
351 self.count = 0
11230
5116a077c3da make transactions work on non-refcounted python implementations
Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de>
parents: 10282
diff changeset
352 self.usages = 0
8290
560af1bbfd6e transaction: reset transaction on abort
Henrik Stuart <hg@hstuart.dk>
parents: 8289
diff changeset
353 self.file.close()
21206
c77418938d05 transaction: fix file descriptor leak for journal.backupfiles
Durham Goode <durham@fb.com>
parents: 21150
diff changeset
354 self.backupsfile.close()
8290
560af1bbfd6e transaction: reset transaction on abort
Henrik Stuart <hg@hstuart.dk>
parents: 8289
diff changeset
355
20881
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic
Durham Goode <durham@fb.com>
parents: 20524
diff changeset
356 if self.onabort is not None:
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic
Durham Goode <durham@fb.com>
parents: 20524
diff changeset
357 self.onabort()
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic
Durham Goode <durham@fb.com>
parents: 20524
diff changeset
358
10228
056c366fea8c transaction: initialize self.journal to None after deletion
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 9693
diff changeset
359 try:
20882
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
360 if not self.entries and not self.backupentries:
10228
056c366fea8c transaction: initialize self.journal to None after deletion
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 9693
diff changeset
361 if self.journal:
20087
cf3b8285af00 transaction: take journal file path relative to vfs to use file API via vfs
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 20084
diff changeset
362 self.opener.unlink(self.journal)
20882
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
363 if self.backupjournal:
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
364 self.opener.unlink(self.backupjournal)
10228
056c366fea8c transaction: initialize self.journal to None after deletion
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 9693
diff changeset
365 return
0
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mpm@selenic.com
parents:
diff changeset
366
10228
056c366fea8c transaction: initialize self.journal to None after deletion
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 9693
diff changeset
367 self.report(_("transaction abort!\n"))
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
368
108
8d55c2d72c7c Warn if we fail to truncate something
mpm@selenic.com
parents: 95
diff changeset
369 try:
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10263
diff changeset
370 _playback(self.journal, self.report, self.opener,
20882
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
371 self.entries, self.backupentries, False)
8294
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Henrik Stuart <hg@hstuart.dk>
parents: 8290
diff changeset
372 self.report(_("rollback completed\n"))
16689
f366d4c2ff34 cleanup: replace naked excepts with except Exception: ...
Brodie Rao <brodie@sf.io>
parents: 13408
diff changeset
373 except Exception:
8294
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents: 8290
diff changeset
374 self.report(_("rollback failed - please run hg recover\n"))
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents: 8290
diff changeset
375 finally:
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents: 8290
diff changeset
376 self.journal = None
8290
560af1bbfd6e transaction: reset transaction on abort
Henrik Stuart <hg@hstuart.dk>
parents: 8289
diff changeset
377
560af1bbfd6e transaction: reset transaction on abort
Henrik Stuart <hg@hstuart.dk>
parents: 8289
diff changeset
378
8294
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Henrik Stuart <hg@hstuart.dk>
parents: 8290
diff changeset
379 def rollback(opener, file, report):
20882
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
380 """Rolls back the transaction contained in the given file
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
381
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
382 Reads the entries in the specified file, and the corresponding
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
383 '*.backupfiles' file, to recover from an incomplete transaction.
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
384
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
385 * `file`: a file containing a list of entries, specifying where
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
386 to truncate each file. The file should contain a list of
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
387 file\0offset pairs, delimited by newlines. The corresponding
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
388 '*.backupfiles' file should contain a list of file\0backupfile
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
389 pairs, delimited by \0.
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Durham Goode <durham@fb.com>
parents: 20881
diff changeset
390 """
8294
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parents: 8290
diff changeset
391 entries = []
20882
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Durham Goode <durham@fb.com>
parents: 20881
diff changeset
392 backupentries = []
8294
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Henrik Stuart <hg@hstuart.dk>
parents: 8290
diff changeset
393
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cf3b8285af00 transaction: take journal file path relative to vfs to use file API via vfs
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 20084
diff changeset
394 fp = opener.open(file)
13400
14f3795a5ed7 explicitly close files
Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents: 11685
diff changeset
395 lines = fp.readlines()
14f3795a5ed7 explicitly close files
Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents: 11685
diff changeset
396 fp.close()
14f3795a5ed7 explicitly close files
Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents: 11685
diff changeset
397 for l in lines:
20524
28b8ff84db3f journal: report parsing errors on recover/rollback (issue4172)
Matt Mackall <mpm@selenic.com>
parents: 20087
diff changeset
398 try:
28b8ff84db3f journal: report parsing errors on recover/rollback (issue4172)
Matt Mackall <mpm@selenic.com>
parents: 20087
diff changeset
399 f, o = l.split('\0')
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Matt Mackall <mpm@selenic.com>
parents: 20087
diff changeset
400 entries.append((f, int(o), None))
28b8ff84db3f journal: report parsing errors on recover/rollback (issue4172)
Matt Mackall <mpm@selenic.com>
parents: 20087
diff changeset
401 except ValueError:
28b8ff84db3f journal: report parsing errors on recover/rollback (issue4172)
Matt Mackall <mpm@selenic.com>
parents: 20087
diff changeset
402 report(_("couldn't read journal entry %r!\n") % l)
0
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mpm@selenic.com
parents:
diff changeset
403
20882
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
404 backupjournal = "%s.backupfiles" % file
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
405 if opener.exists(backupjournal):
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
406 fp = opener.open(backupjournal)
23065
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Durham Goode <durham@fb.com>
parents: 23064
diff changeset
407 lines = fp.readlines()
963f311e3a81 transactions: change backupfiles format to use newlines
Durham Goode <durham@fb.com>
parents: 23064
diff changeset
408 if lines:
963f311e3a81 transactions: change backupfiles format to use newlines
Durham Goode <durham@fb.com>
parents: 23064
diff changeset
409 ver = lines[0][:-1]
23064
5dc888b79e70 transactions: add version number to journal.backupfiles
Durham Goode <durham@fb.com>
parents: 23063
diff changeset
410 if ver == str(version):
23065
963f311e3a81 transactions: change backupfiles format to use newlines
Durham Goode <durham@fb.com>
parents: 23064
diff changeset
411 for line in lines[1:]:
963f311e3a81 transactions: change backupfiles format to use newlines
Durham Goode <durham@fb.com>
parents: 23064
diff changeset
412 if line:
963f311e3a81 transactions: change backupfiles format to use newlines
Durham Goode <durham@fb.com>
parents: 23064
diff changeset
413 # Shave off the trailing newline
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Durham Goode <durham@fb.com>
parents: 23064
diff changeset
414 line = line[:-1]
963f311e3a81 transactions: change backupfiles format to use newlines
Durham Goode <durham@fb.com>
parents: 23064
diff changeset
415 f, b = line.split('\0')
23247
def27d46a9a8 transaction: drop the third item in `tr.backupentries`
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 23220
diff changeset
416 backupentries.append((f, b))
23064
5dc888b79e70 transactions: add version number to journal.backupfiles
Durham Goode <durham@fb.com>
parents: 23063
diff changeset
417 else:
5dc888b79e70 transactions: add version number to journal.backupfiles
Durham Goode <durham@fb.com>
parents: 23063
diff changeset
418 report(_("journal was created by a newer version of "
5dc888b79e70 transactions: add version number to journal.backupfiles
Durham Goode <durham@fb.com>
parents: 23063
diff changeset
419 "Mercurial"))
20882
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Durham Goode <durham@fb.com>
parents: 20881
diff changeset
420
5dffd06f1e50 transaction: add support for non-append files
Durham Goode <durham@fb.com>
parents: 20881
diff changeset
421 _playback(file, report, opener, entries, backupentries)