Mercurial > hg
annotate mercurial/dirstatemap.py @ 48710:b0aa9b0b9c21
convert: use the merge action constant
The constant exists, lets use them. Otherwise we cannot make these constant more
powerful.
Differential Revision: https://phab.mercurial-scm.org/D12113
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Fri, 28 Jan 2022 16:25:41 +0100 |
parents | 1a8a70b4b0ad |
children | 6000f5b25c9b |
rev | line source |
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1 # dirstatemap.py |
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2 # |
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3 # This software may be used and distributed according to the terms of the |
10263 | 4 # GNU General Public License version 2 or any later version. |
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5 |
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6 from __future__ import absolute_import |
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7 |
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8 import errno |
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9 |
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10 from .i18n import _ |
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11 |
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12 from . import ( |
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13 error, |
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14 pathutil, |
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15 policy, |
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16 pycompat, |
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17 txnutil, |
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18 util, |
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19 ) |
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20 |
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21 from .dirstateutils import ( |
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22 docket as docketmod, |
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23 v2, |
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24 ) |
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25 |
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26 parsers = policy.importmod('parsers') |
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27 rustmod = policy.importrust('dirstate') |
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28 |
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29 propertycache = util.propertycache |
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30 |
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31 if rustmod is None: |
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32 DirstateItem = parsers.DirstateItem |
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33 else: |
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34 DirstateItem = rustmod.DirstateItem |
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35 |
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36 rangemask = 0x7FFFFFFF |
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37 |
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38 |
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39 class _dirstatemapcommon(object): |
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40 """ |
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41 Methods that are identical for both implementations of the dirstatemap |
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42 class, with and without Rust extensions enabled. |
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43 """ |
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44 |
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45 # please pytype |
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46 |
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47 _map = None |
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48 copymap = None |
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49 |
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50 def __init__(self, ui, opener, root, nodeconstants, use_dirstate_v2): |
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51 self._use_dirstate_v2 = use_dirstate_v2 |
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52 self._nodeconstants = nodeconstants |
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53 self._ui = ui |
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54 self._opener = opener |
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55 self._root = root |
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56 self._filename = b'dirstate' |
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57 self._nodelen = 20 # Also update Rust code when changing this! |
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58 self._parents = None |
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59 self._dirtyparents = False |
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60 self._docket = None |
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61 |
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62 # for consistent view between _pl() and _read() invocations |
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63 self._pendingmode = None |
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64 |
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65 def preload(self): |
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66 """Loads the underlying data, if it's not already loaded""" |
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67 self._map |
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68 |
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69 def get(self, key, default=None): |
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70 return self._map.get(key, default) |
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71 |
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72 def __len__(self): |
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73 return len(self._map) |
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74 |
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75 def __iter__(self): |
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76 return iter(self._map) |
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77 |
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78 def __contains__(self, key): |
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79 return key in self._map |
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80 |
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81 def __getitem__(self, item): |
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82 return self._map[item] |
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83 |
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84 ### sub-class utility method |
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85 # |
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86 # Use to allow for generic implementation of some method while still coping |
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87 # with minor difference between implementation. |
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88 |
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89 def _dirs_incr(self, filename, old_entry=None): |
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90 """incremente the dirstate counter if applicable |
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91 |
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92 This might be a no-op for some subclass who deal with directory |
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93 tracking in a different way. |
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94 """ |
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95 |
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96 def _dirs_decr(self, filename, old_entry=None, remove_variant=False): |
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97 """decremente the dirstate counter if applicable |
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98 |
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99 This might be a no-op for some subclass who deal with directory |
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100 tracking in a different way. |
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101 """ |
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102 |
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103 def _refresh_entry(self, f, entry): |
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104 """record updated state of an entry""" |
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105 |
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106 def _insert_entry(self, f, entry): |
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107 """add a new dirstate entry (or replace an unrelated one) |
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108 |
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109 The fact it is actually new is the responsability of the caller |
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110 """ |
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111 |
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112 def _drop_entry(self, f): |
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113 """remove any entry for file f |
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114 |
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115 This should also drop associated copy information |
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116 |
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117 The fact we actually need to drop it is the responsability of the caller""" |
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118 |
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119 ### method to manipulate the entries |
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120 |
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121 def set_possibly_dirty(self, filename): |
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122 """record that the current state of the file on disk is unknown""" |
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123 entry = self[filename] |
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124 entry.set_possibly_dirty() |
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125 self._refresh_entry(filename, entry) |
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126 |
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127 def set_clean(self, filename, mode, size, mtime): |
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128 """mark a file as back to a clean state""" |
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129 entry = self[filename] |
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130 size = size & rangemask |
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131 entry.set_clean(mode, size, mtime) |
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132 self._refresh_entry(filename, entry) |
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133 self.copymap.pop(filename, None) |
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134 |
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135 def set_tracked(self, filename): |
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136 new = False |
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137 entry = self.get(filename) |
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138 if entry is None: |
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139 self._dirs_incr(filename) |
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140 entry = DirstateItem( |
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141 wc_tracked=True, |
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142 ) |
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143 |
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144 self._insert_entry(filename, entry) |
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145 new = True |
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146 elif not entry.tracked: |
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147 self._dirs_incr(filename, entry) |
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148 entry.set_tracked() |
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149 self._refresh_entry(filename, entry) |
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150 new = True |
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151 else: |
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152 # XXX This is probably overkill for more case, but we need this to |
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153 # fully replace the `normallookup` call with `set_tracked` one. |
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154 # Consider smoothing this in the future. |
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155 entry.set_possibly_dirty() |
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156 self._refresh_entry(filename, entry) |
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157 return new |
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158 |
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159 def set_untracked(self, f): |
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160 """Mark a file as no longer tracked in the dirstate map""" |
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161 entry = self.get(f) |
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162 if entry is None: |
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163 return False |
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164 else: |
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165 self._dirs_decr(f, old_entry=entry, remove_variant=not entry.added) |
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166 if not entry.p2_info: |
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167 self.copymap.pop(f, None) |
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168 entry.set_untracked() |
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169 self._refresh_entry(f, entry) |
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170 return True |
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171 |
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172 def reset_state( |
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173 self, |
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174 filename, |
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175 wc_tracked=False, |
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176 p1_tracked=False, |
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177 p2_info=False, |
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178 has_meaningful_mtime=True, |
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179 has_meaningful_data=True, |
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180 parentfiledata=None, |
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181 ): |
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182 """Set a entry to a given state, diregarding all previous state |
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183 |
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184 This is to be used by the part of the dirstate API dedicated to |
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185 adjusting the dirstate after a update/merge. |
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186 |
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187 note: calling this might result to no entry existing at all if the |
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188 dirstate map does not see any point at having one for this file |
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189 anymore. |
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190 """ |
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191 # copy information are now outdated |
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192 # (maybe new information should be in directly passed to this function) |
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193 self.copymap.pop(filename, None) |
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194 |
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195 if not (p1_tracked or p2_info or wc_tracked): |
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196 old_entry = self._map.get(filename) |
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197 self._drop_entry(filename) |
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198 self._dirs_decr(filename, old_entry=old_entry) |
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199 return |
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200 |
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201 old_entry = self._map.get(filename) |
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202 self._dirs_incr(filename, old_entry) |
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203 entry = DirstateItem( |
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204 wc_tracked=wc_tracked, |
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205 p1_tracked=p1_tracked, |
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206 p2_info=p2_info, |
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207 has_meaningful_mtime=has_meaningful_mtime, |
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208 parentfiledata=parentfiledata, |
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209 ) |
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210 self._insert_entry(filename, entry) |
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211 |
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212 ### disk interaction |
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213 |
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214 def _opendirstatefile(self): |
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215 fp, mode = txnutil.trypending(self._root, self._opener, self._filename) |
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216 if self._pendingmode is not None and self._pendingmode != mode: |
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217 fp.close() |
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218 raise error.Abort( |
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219 _(b'working directory state may be changed parallelly') |
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220 ) |
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221 self._pendingmode = mode |
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222 return fp |
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223 |
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224 def _readdirstatefile(self, size=-1): |
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225 try: |
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226 with self._opendirstatefile() as fp: |
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227 return fp.read(size) |
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228 except IOError as err: |
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229 if err.errno != errno.ENOENT: |
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230 raise |
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231 # File doesn't exist, so the current state is empty |
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232 return b'' |
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233 |
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234 @property |
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235 def docket(self): |
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236 if not self._docket: |
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237 if not self._use_dirstate_v2: |
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238 raise error.ProgrammingError( |
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239 b'dirstate only has a docket in v2 format' |
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240 ) |
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241 self._docket = docketmod.DirstateDocket.parse( |
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242 self._readdirstatefile(), self._nodeconstants |
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243 ) |
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244 return self._docket |
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245 |
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246 def write_v2_no_append(self, tr, st, meta, packed): |
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247 old_docket = self.docket |
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248 new_docket = docketmod.DirstateDocket.with_new_uuid( |
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249 self.parents(), len(packed), meta |
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250 ) |
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251 data_filename = new_docket.data_filename() |
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252 if tr: |
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253 tr.add(data_filename, 0) |
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254 self._opener.write(data_filename, packed) |
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255 # Write the new docket after the new data file has been |
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256 # written. Because `st` was opened with `atomictemp=True`, |
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257 # the actual `.hg/dirstate` file is only affected on close. |
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258 st.write(new_docket.serialize()) |
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259 st.close() |
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260 # Remove the old data file after the new docket pointing to |
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261 # the new data file was written. |
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262 if old_docket.uuid: |
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263 data_filename = old_docket.data_filename() |
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264 unlink = lambda _tr=None: self._opener.unlink(data_filename) |
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265 if tr: |
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266 category = b"dirstate-v2-clean-" + old_docket.uuid |
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267 tr.addpostclose(category, unlink) |
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268 else: |
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269 unlink() |
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270 self._docket = new_docket |
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271 |
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272 ### reading/setting parents |
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273 |
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274 def parents(self): |
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275 if not self._parents: |
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276 if self._use_dirstate_v2: |
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277 self._parents = self.docket.parents |
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278 else: |
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279 read_len = self._nodelen * 2 |
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280 st = self._readdirstatefile(read_len) |
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281 l = len(st) |
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282 if l == read_len: |
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283 self._parents = ( |
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284 st[: self._nodelen], |
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285 st[self._nodelen : 2 * self._nodelen], |
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286 ) |
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287 elif l == 0: |
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288 self._parents = ( |
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289 self._nodeconstants.nullid, |
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290 self._nodeconstants.nullid, |
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291 ) |
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292 else: |
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293 raise error.Abort( |
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294 _(b'working directory state appears damaged!') |
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295 ) |
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296 |
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297 return self._parents |
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298 |
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299 |
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300 class dirstatemap(_dirstatemapcommon): |
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301 """Map encapsulating the dirstate's contents. |
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302 |
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303 The dirstate contains the following state: |
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304 |
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305 - `identity` is the identity of the dirstate file, which can be used to |
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306 detect when changes have occurred to the dirstate file. |
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307 |
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308 - `parents` is a pair containing the parents of the working copy. The |
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309 parents are updated by calling `setparents`. |
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310 |
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311 - the state map maps filenames to tuples of (state, mode, size, mtime), |
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312 where state is a single character representing 'normal', 'added', |
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313 'removed', or 'merged'. It is read by treating the dirstate as a |
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314 dict. File state is updated by calling various methods (see each |
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315 documentation for details): |
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316 |
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317 - `reset_state`, |
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318 - `set_tracked` |
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319 - `set_untracked` |
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320 - `set_clean` |
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321 - `set_possibly_dirty` |
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322 |
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323 - `copymap` maps destination filenames to their source filename. |
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324 |
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325 The dirstate also provides the following views onto the state: |
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326 |
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327 - `filefoldmap` is a dict mapping normalized filenames to the denormalized |
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328 form that they appear as in the dirstate. |
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329 |
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330 - `dirfoldmap` is a dict mapping normalized directory names to the |
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331 denormalized form that they appear as in the dirstate. |
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332 """ |
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333 |
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334 ### Core data storage and access |
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335 |
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336 @propertycache |
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337 def _map(self): |
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338 self._map = {} |
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339 self.read() |
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340 return self._map |
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341 |
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342 @propertycache |
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343 def copymap(self): |
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344 self.copymap = {} |
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345 self._map |
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346 return self.copymap |
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347 |
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348 def clear(self): |
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349 self._map.clear() |
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350 self.copymap.clear() |
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351 self.setparents(self._nodeconstants.nullid, self._nodeconstants.nullid) |
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352 util.clearcachedproperty(self, b"_dirs") |
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353 util.clearcachedproperty(self, b"_alldirs") |
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354 util.clearcachedproperty(self, b"filefoldmap") |
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355 util.clearcachedproperty(self, b"dirfoldmap") |
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356 |
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357 def items(self): |
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358 return pycompat.iteritems(self._map) |
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359 |
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360 # forward for python2,3 compat |
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361 iteritems = items |
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362 |
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363 def debug_iter(self, all): |
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364 """ |
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365 Return an iterator of (filename, state, mode, size, mtime) tuples |
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366 |
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367 `all` is unused when Rust is not enabled |
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368 """ |
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369 for (filename, item) in self.items(): |
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370 yield (filename, item.state, item.mode, item.size, item.mtime) |
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371 |
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372 def keys(self): |
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373 return self._map.keys() |
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374 |
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375 ### reading/setting parents |
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376 |
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377 def setparents(self, p1, p2, fold_p2=False): |
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378 self._parents = (p1, p2) |
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379 self._dirtyparents = True |
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380 copies = {} |
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381 if fold_p2: |
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382 for f, s in pycompat.iteritems(self._map): |
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383 # Discard "merged" markers when moving away from a merge state |
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384 if s.p2_info: |
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385 source = self.copymap.pop(f, None) |
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386 if source: |
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387 copies[f] = source |
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388 s.drop_merge_data() |
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389 return copies |
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390 |
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391 ### disk interaction |
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392 |
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393 def read(self): |
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394 # ignore HG_PENDING because identity is used only for writing |
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395 self.identity = util.filestat.frompath( |
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396 self._opener.join(self._filename) |
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397 ) |
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398 |
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399 if self._use_dirstate_v2: |
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400 if not self.docket.uuid: |
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401 return |
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402 st = self._opener.read(self.docket.data_filename()) |
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403 else: |
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404 st = self._readdirstatefile() |
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405 |
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406 if not st: |
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407 return |
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408 |
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409 # TODO: adjust this estimate for dirstate-v2 |
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410 if util.safehasattr(parsers, b'dict_new_presized'): |
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411 # Make an estimate of the number of files in the dirstate based on |
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412 # its size. This trades wasting some memory for avoiding costly |
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413 # resizes. Each entry have a prefix of 17 bytes followed by one or |
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414 # two path names. Studies on various large-scale real-world repositories |
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415 # found 54 bytes a reasonable upper limit for the average path names. |
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416 # Copy entries are ignored for the sake of this estimate. |
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417 self._map = parsers.dict_new_presized(len(st) // 71) |
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418 |
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419 # Python's garbage collector triggers a GC each time a certain number |
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420 # of container objects (the number being defined by |
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421 # gc.get_threshold()) are allocated. parse_dirstate creates a tuple |
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422 # for each file in the dirstate. The C version then immediately marks |
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423 # them as not to be tracked by the collector. However, this has no |
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424 # effect on when GCs are triggered, only on what objects the GC looks |
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425 # into. This means that O(number of files) GCs are unavoidable. |
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426 # Depending on when in the process's lifetime the dirstate is parsed, |
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427 # this can get very expensive. As a workaround, disable GC while |
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428 # parsing the dirstate. |
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429 # |
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430 # (we cannot decorate the function directly since it is in a C module) |
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431 if self._use_dirstate_v2: |
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432 p = self.docket.parents |
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433 meta = self.docket.tree_metadata |
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434 parse_dirstate = util.nogc(v2.parse_dirstate) |
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435 parse_dirstate(self._map, self.copymap, st, meta) |
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436 else: |
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437 parse_dirstate = util.nogc(parsers.parse_dirstate) |
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438 p = parse_dirstate(self._map, self.copymap, st) |
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439 if not self._dirtyparents: |
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440 self.setparents(*p) |
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441 |
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442 # Avoid excess attribute lookups by fast pathing certain checks |
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443 self.__contains__ = self._map.__contains__ |
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444 self.__getitem__ = self._map.__getitem__ |
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445 self.get = self._map.get |
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446 |
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447 def write(self, tr, st): |
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448 if self._use_dirstate_v2: |
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449 packed, meta = v2.pack_dirstate(self._map, self.copymap) |
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450 self.write_v2_no_append(tr, st, meta, packed) |
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451 else: |
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452 packed = parsers.pack_dirstate( |
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453 self._map, self.copymap, self.parents() |
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454 ) |
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455 st.write(packed) |
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456 st.close() |
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457 self._dirtyparents = False |
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458 |
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459 @propertycache |
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460 def identity(self): |
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461 self._map |
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462 return self.identity |
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463 |
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464 ### code related to maintaining and accessing "extra" property |
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465 # (e.g. "has_dir") |
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466 |
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467 def _dirs_incr(self, filename, old_entry=None): |
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468 """incremente the dirstate counter if applicable""" |
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469 if ( |
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470 old_entry is None or old_entry.removed |
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471 ) and "_dirs" in self.__dict__: |
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472 self._dirs.addpath(filename) |
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473 if old_entry is None and "_alldirs" in self.__dict__: |
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474 self._alldirs.addpath(filename) |
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475 |
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476 def _dirs_decr(self, filename, old_entry=None, remove_variant=False): |
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477 """decremente the dirstate counter if applicable""" |
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478 if old_entry is not None: |
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479 if "_dirs" in self.__dict__ and not old_entry.removed: |
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480 self._dirs.delpath(filename) |
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481 if "_alldirs" in self.__dict__ and not remove_variant: |
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482 self._alldirs.delpath(filename) |
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483 elif remove_variant and "_alldirs" in self.__dict__: |
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484 self._alldirs.addpath(filename) |
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485 if "filefoldmap" in self.__dict__: |
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486 normed = util.normcase(filename) |
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487 self.filefoldmap.pop(normed, None) |
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488 |
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489 @propertycache |
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490 def filefoldmap(self): |
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491 """Returns a dictionary mapping normalized case paths to their |
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492 non-normalized versions. |
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493 """ |
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494 try: |
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495 makefilefoldmap = parsers.make_file_foldmap |
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496 except AttributeError: |
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497 pass |
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498 else: |
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499 return makefilefoldmap( |
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500 self._map, util.normcasespec, util.normcasefallback |
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501 ) |
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502 |
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503 f = {} |
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504 normcase = util.normcase |
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505 for name, s in pycompat.iteritems(self._map): |
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506 if not s.removed: |
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507 f[normcase(name)] = name |
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508 f[b'.'] = b'.' # prevents useless util.fspath() invocation |
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509 return f |
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510 |
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511 @propertycache |
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512 def dirfoldmap(self): |
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513 f = {} |
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514 normcase = util.normcase |
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515 for name in self._dirs: |
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516 f[normcase(name)] = name |
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517 return f |
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518 |
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519 def hastrackeddir(self, d): |
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520 """ |
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521 Returns True if the dirstate contains a tracked (not removed) file |
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522 in this directory. |
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523 """ |
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524 return d in self._dirs |
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525 |
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526 def hasdir(self, d): |
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527 """ |
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528 Returns True if the dirstate contains a file (tracked or removed) |
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529 in this directory. |
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530 """ |
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531 return d in self._alldirs |
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532 |
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533 @propertycache |
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534 def _dirs(self): |
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535 return pathutil.dirs(self._map, only_tracked=True) |
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536 |
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537 @propertycache |
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538 def _alldirs(self): |
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539 return pathutil.dirs(self._map) |
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540 |
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541 ### code related to manipulation of entries and copy-sources |
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542 |
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543 def _refresh_entry(self, f, entry): |
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544 if not entry.any_tracked: |
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545 self._map.pop(f, None) |
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546 |
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547 def _insert_entry(self, f, entry): |
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548 self._map[f] = entry |
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549 |
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550 def _drop_entry(self, f): |
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551 self._map.pop(f, None) |
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552 self.copymap.pop(f, None) |
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553 |
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554 |
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555 if rustmod is not None: |
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556 |
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557 class dirstatemap(_dirstatemapcommon): |
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558 |
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559 ### Core data storage and access |
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560 |
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561 @propertycache |
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562 def _map(self): |
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563 """ |
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564 Fills the Dirstatemap when called. |
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565 """ |
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566 # ignore HG_PENDING because identity is used only for writing |
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567 self.identity = util.filestat.frompath( |
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568 self._opener.join(self._filename) |
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569 ) |
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570 |
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571 if self._use_dirstate_v2: |
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572 if self.docket.uuid: |
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573 # TODO: use mmap when possible |
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574 data = self._opener.read(self.docket.data_filename()) |
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575 else: |
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576 data = b'' |
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577 self._map = rustmod.DirstateMap.new_v2( |
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578 data, self.docket.data_size, self.docket.tree_metadata |
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579 ) |
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580 parents = self.docket.parents |
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581 else: |
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582 self._map, parents = rustmod.DirstateMap.new_v1( |
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583 self._readdirstatefile() |
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584 ) |
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585 |
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586 if parents and not self._dirtyparents: |
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587 self.setparents(*parents) |
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588 |
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589 self.__contains__ = self._map.__contains__ |
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590 self.__getitem__ = self._map.__getitem__ |
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591 self.get = self._map.get |
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592 return self._map |
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593 |
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594 @property |
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595 def copymap(self): |
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596 return self._map.copymap() |
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597 |
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598 def debug_iter(self, all): |
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599 """ |
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600 Return an iterator of (filename, state, mode, size, mtime) tuples |
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601 |
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602 `all`: also include with `state == b' '` dirstate tree nodes that |
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603 don't have an associated `DirstateItem`. |
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604 |
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605 """ |
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606 return self._map.debug_iter(all) |
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607 |
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608 def clear(self): |
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609 self._map.clear() |
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610 self.setparents( |
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611 self._nodeconstants.nullid, self._nodeconstants.nullid |
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612 ) |
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613 util.clearcachedproperty(self, b"_dirs") |
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614 util.clearcachedproperty(self, b"_alldirs") |
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615 util.clearcachedproperty(self, b"dirfoldmap") |
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616 |
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617 def items(self): |
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618 return self._map.items() |
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619 |
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620 # forward for python2,3 compat |
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621 iteritems = items |
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622 |
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623 def keys(self): |
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624 return iter(self._map) |
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625 |
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626 ### reading/setting parents |
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627 |
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628 def setparents(self, p1, p2, fold_p2=False): |
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629 self._parents = (p1, p2) |
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630 self._dirtyparents = True |
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631 copies = {} |
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632 if fold_p2: |
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633 # Collect into an intermediate list to avoid a `RuntimeError` |
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634 # exception due to mutation during iteration. |
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635 # TODO: move this the whole loop to Rust where `iter_mut` |
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636 # enables in-place mutation of elements of a collection while |
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637 # iterating it, without mutating the collection itself. |
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638 files_with_p2_info = [ |
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639 f for f, s in self._map.items() if s.p2_info |
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640 ] |
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641 rust_map = self._map |
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642 for f in files_with_p2_info: |
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643 e = rust_map.get(f) |
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644 source = self.copymap.pop(f, None) |
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645 if source: |
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646 copies[f] = source |
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647 e.drop_merge_data() |
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648 rust_map.set_dirstate_item(f, e) |
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649 return copies |
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650 |
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651 ### disk interaction |
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652 |
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653 @propertycache |
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654 def identity(self): |
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655 self._map |
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656 return self.identity |
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657 |
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658 def write(self, tr, st): |
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659 if not self._use_dirstate_v2: |
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660 p1, p2 = self.parents() |
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661 packed = self._map.write_v1(p1, p2) |
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662 st.write(packed) |
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663 st.close() |
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664 self._dirtyparents = False |
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665 return |
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666 |
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667 # We can only append to an existing data file if there is one |
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668 can_append = self.docket.uuid is not None |
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669 packed, meta, append = self._map.write_v2(can_append) |
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670 if append: |
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671 docket = self.docket |
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672 data_filename = docket.data_filename() |
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673 if tr: |
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674 tr.add(data_filename, docket.data_size) |
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675 with self._opener(data_filename, b'r+b') as fp: |
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676 fp.seek(docket.data_size) |
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677 assert fp.tell() == docket.data_size |
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678 written = fp.write(packed) |
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679 if written is not None: # py2 may return None |
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680 assert written == len(packed), (written, len(packed)) |
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681 docket.data_size += len(packed) |
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682 docket.parents = self.parents() |
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683 docket.tree_metadata = meta |
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684 st.write(docket.serialize()) |
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685 st.close() |
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686 else: |
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687 self.write_v2_no_append(tr, st, meta, packed) |
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688 # Reload from the newly-written file |
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689 util.clearcachedproperty(self, b"_map") |
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690 self._dirtyparents = False |
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691 |
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692 ### code related to maintaining and accessing "extra" property |
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693 # (e.g. "has_dir") |
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694 |
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695 @propertycache |
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696 def filefoldmap(self): |
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697 """Returns a dictionary mapping normalized case paths to their |
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698 non-normalized versions. |
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699 """ |
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700 return self._map.filefoldmapasdict() |
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701 |
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702 def hastrackeddir(self, d): |
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703 return self._map.hastrackeddir(d) |
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704 |
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705 def hasdir(self, d): |
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706 return self._map.hasdir(d) |
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707 |
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708 @propertycache |
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709 def dirfoldmap(self): |
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710 f = {} |
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711 normcase = util.normcase |
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712 for name in self._map.tracked_dirs(): |
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713 f[normcase(name)] = name |
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714 return f |
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715 |
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716 ### code related to manipulation of entries and copy-sources |
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717 |
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718 def _refresh_entry(self, f, entry): |
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719 if not entry.any_tracked: |
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720 self._map.drop_item_and_copy_source(f) |
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721 else: |
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722 self._map.addfile(f, entry) |
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723 |
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724 def _insert_entry(self, f, entry): |
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725 self._map.addfile(f, entry) |
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726 |
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727 def _drop_entry(self, f): |
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728 self._map.drop_item_and_copy_source(f) |
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729 |
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730 def __setitem__(self, key, value): |
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731 assert isinstance(value, DirstateItem) |
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732 self._map.set_dirstate_item(key, value) |