Mercurial > hg
annotate mercurial/vfs.py @ 50365:d1d458fb96a5 stable
vfsproxy: inherit the `createmode` attribute too
It is an important part of the API when creating directory. We will need it in
the next changeset.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Wed, 03 May 2023 00:12:34 +0200 |
parents | bc83ebe07bf0 |
children | f173c2c23289 |
rev | line source |
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vfs: extract 'vfs' class and related code to a new 'vfs' module (API)
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1 # vfs.py - Mercurial 'vfs' classes |
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2 # |
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3 # Copyright Olivia Mackall <olivia@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 import contextlib |
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9 import os |
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10 import shutil |
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11 import stat |
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12 import threading |
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13 |
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14 from typing import ( |
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15 Optional, |
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16 ) |
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17 |
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18 from .i18n import _ |
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19 from .pycompat import ( |
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20 delattr, |
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21 getattr, |
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22 setattr, |
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23 ) |
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24 from . import ( |
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25 encoding, |
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26 error, |
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27 pathutil, |
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28 pycompat, |
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29 util, |
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30 ) |
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31 |
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32 |
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33 def _avoidambig(path: bytes, oldstat): |
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34 """Avoid file stat ambiguity forcibly |
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35 |
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36 This function causes copying ``path`` file, if it is owned by |
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37 another (see issue5418 and issue5584 for detail). |
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38 """ |
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39 |
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40 def checkandavoid(): |
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41 newstat = util.filestat.frompath(path) |
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42 # return whether file stat ambiguity is (already) avoided |
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43 return not newstat.isambig(oldstat) or newstat.avoidambig(path, oldstat) |
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44 |
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45 if not checkandavoid(): |
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46 # simply copy to change owner of path to get privilege to |
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47 # advance mtime (see issue5418) |
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48 util.rename(util.mktempcopy(path), path) |
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49 checkandavoid() |
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50 |
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51 |
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52 class abstractvfs: |
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53 """Abstract base class; cannot be instantiated""" |
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54 |
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55 # default directory separator for vfs |
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56 # |
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57 # Other vfs code always use `/` and this works fine because python file API |
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58 # abstract the use of `/` and make it work transparently. For consistency |
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59 # vfs will always use `/` when joining. This avoid some confusion in |
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60 # encoded vfs (see issue6546) |
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61 _dir_sep = b'/' |
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62 |
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63 def __init__(self, *args, **kwargs): |
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64 '''Prevent instantiation; don't call this from subclasses.''' |
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65 raise NotImplementedError('attempted instantiating ' + str(type(self))) |
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66 |
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67 # TODO: type return, which is util.posixfile wrapped by a proxy |
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68 def __call__(self, path: bytes, mode: bytes = b'rb', **kwargs): |
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69 raise NotImplementedError |
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70 |
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71 def _auditpath(self, path: bytes, mode: bytes): |
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72 raise NotImplementedError |
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73 |
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74 def join(self, path: Optional[bytes], *insidef: bytes) -> bytes: |
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75 raise NotImplementedError |
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76 |
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77 def tryread(self, path: bytes) -> bytes: |
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78 '''gracefully return an empty string for missing files''' |
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79 try: |
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80 return self.read(path) |
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81 except FileNotFoundError: |
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82 pass |
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83 return b"" |
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84 |
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85 def tryreadlines(self, path: bytes, mode: bytes = b'rb'): |
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86 '''gracefully return an empty array for missing files''' |
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87 try: |
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88 return self.readlines(path, mode=mode) |
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89 except FileNotFoundError: |
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90 pass |
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91 return [] |
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92 |
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93 @util.propertycache |
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94 def open(self): |
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95 """Open ``path`` file, which is relative to vfs root. |
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96 |
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97 Newly created directories are marked as "not to be indexed by |
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98 the content indexing service", if ``notindexed`` is specified |
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99 for "write" mode access. |
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100 """ |
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101 return self.__call__ |
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102 |
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103 def read(self, path: bytes) -> bytes: |
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104 with self(path, b'rb') as fp: |
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105 return fp.read() |
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106 |
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107 def readlines(self, path: bytes, mode: bytes = b'rb'): |
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108 with self(path, mode=mode) as fp: |
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109 return fp.readlines() |
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110 |
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111 def write( |
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112 self, path: bytes, data: bytes, backgroundclose=False, **kwargs |
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113 ) -> int: |
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114 with self(path, b'wb', backgroundclose=backgroundclose, **kwargs) as fp: |
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115 return fp.write(data) |
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116 |
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117 def writelines( |
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118 self, path: bytes, data: bytes, mode: bytes = b'wb', notindexed=False |
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119 ) -> None: |
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120 with self(path, mode=mode, notindexed=notindexed) as fp: |
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121 return fp.writelines(data) |
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122 |
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123 def append(self, path: bytes, data: bytes) -> int: |
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124 with self(path, b'ab') as fp: |
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125 return fp.write(data) |
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126 |
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127 def basename(self, path: bytes) -> bytes: |
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128 """return base element of a path (as os.path.basename would do) |
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129 |
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130 This exists to allow handling of strange encoding if needed.""" |
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131 return os.path.basename(path) |
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132 |
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133 def chmod(self, path: bytes, mode: int) -> None: |
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134 return os.chmod(self.join(path), mode) |
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135 |
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136 def dirname(self, path: bytes) -> bytes: |
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137 """return dirname element of a path (as os.path.dirname would do) |
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138 |
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139 This exists to allow handling of strange encoding if needed.""" |
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140 return os.path.dirname(path) |
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141 |
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142 def exists(self, path: Optional[bytes] = None) -> bool: |
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143 return os.path.exists(self.join(path)) |
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144 |
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145 def fstat(self, fp): |
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146 return util.fstat(fp) |
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147 |
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148 def isdir(self, path: Optional[bytes] = None) -> bool: |
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149 return os.path.isdir(self.join(path)) |
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150 |
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151 def isfile(self, path: Optional[bytes] = None) -> bool: |
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152 return os.path.isfile(self.join(path)) |
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153 |
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154 def islink(self, path: Optional[bytes] = None) -> bool: |
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155 return os.path.islink(self.join(path)) |
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156 |
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157 def isfileorlink(self, path: Optional[bytes] = None) -> bool: |
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158 """return whether path is a regular file or a symlink |
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159 |
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160 Unlike isfile, this doesn't follow symlinks.""" |
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161 try: |
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162 st = self.lstat(path) |
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163 except OSError: |
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164 return False |
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165 mode = st.st_mode |
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166 return stat.S_ISREG(mode) or stat.S_ISLNK(mode) |
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167 |
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168 def _join(self, *paths: bytes) -> bytes: |
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169 root_idx = 0 |
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170 for idx, p in enumerate(paths): |
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171 if os.path.isabs(p) or p.startswith(self._dir_sep): |
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172 root_idx = idx |
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173 if root_idx != 0: |
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174 paths = paths[root_idx:] |
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175 paths = [p for p in paths if p] |
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176 return self._dir_sep.join(paths) |
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177 |
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178 def reljoin(self, *paths: bytes) -> bytes: |
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179 """join various elements of a path together (as os.path.join would do) |
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180 |
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181 The vfs base is not injected so that path stay relative. This exists |
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182 to allow handling of strange encoding if needed.""" |
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183 return self._join(*paths) |
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184 |
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185 def split(self, path: bytes): |
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186 """split top-most element of a path (as os.path.split would do) |
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187 |
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188 This exists to allow handling of strange encoding if needed.""" |
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189 return os.path.split(path) |
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190 |
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191 def lexists(self, path: Optional[bytes] = None) -> bool: |
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192 return os.path.lexists(self.join(path)) |
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193 |
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194 def lstat(self, path: Optional[bytes] = None): |
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195 return os.lstat(self.join(path)) |
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196 |
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197 def listdir(self, path: Optional[bytes] = None): |
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198 return os.listdir(self.join(path)) |
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199 |
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200 def makedir(self, path: Optional[bytes] = None, notindexed=True): |
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201 return util.makedir(self.join(path), notindexed) |
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202 |
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203 def makedirs( |
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204 self, path: Optional[bytes] = None, mode: Optional[int] = None |
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205 ): |
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206 return util.makedirs(self.join(path), mode) |
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207 |
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208 def makelock(self, info, path: bytes): |
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209 return util.makelock(info, self.join(path)) |
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210 |
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211 def mkdir(self, path: Optional[bytes] = None): |
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212 return os.mkdir(self.join(path)) |
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213 |
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214 def mkstemp( |
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215 self, |
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216 suffix: bytes = b'', |
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217 prefix: bytes = b'tmp', |
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218 dir: Optional[bytes] = None, |
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219 ): |
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220 fd, name = pycompat.mkstemp( |
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221 suffix=suffix, prefix=prefix, dir=self.join(dir) |
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222 ) |
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223 dname, fname = util.split(name) |
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224 if dir: |
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225 return fd, os.path.join(dir, fname) |
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226 else: |
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227 return fd, fname |
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228 |
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229 def readdir(self, path: Optional[bytes] = None, stat=None, skip=None): |
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230 return util.listdir(self.join(path), stat, skip) |
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231 |
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232 def readlock(self, path: bytes) -> bytes: |
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233 return util.readlock(self.join(path)) |
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234 |
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235 def rename(self, src: bytes, dst: bytes, checkambig=False): |
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236 """Rename from src to dst |
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237 |
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238 checkambig argument is used with util.filestat, and is useful |
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239 only if destination file is guarded by any lock |
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240 (e.g. repo.lock or repo.wlock). |
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241 |
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242 To avoid file stat ambiguity forcibly, checkambig=True involves |
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243 copying ``src`` file, if it is owned by another. Therefore, use |
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244 checkambig=True only in limited cases (see also issue5418 and |
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245 issue5584 for detail). |
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246 """ |
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247 self._auditpath(dst, b'w') |
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248 srcpath = self.join(src) |
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249 dstpath = self.join(dst) |
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250 oldstat = checkambig and util.filestat.frompath(dstpath) |
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251 if oldstat and oldstat.stat: |
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252 ret = util.rename(srcpath, dstpath) |
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253 _avoidambig(dstpath, oldstat) |
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254 return ret |
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255 return util.rename(srcpath, dstpath) |
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256 |
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257 def readlink(self, path: bytes) -> bytes: |
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258 return util.readlink(self.join(path)) |
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259 |
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260 def removedirs(self, path: Optional[bytes] = None): |
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261 """Remove a leaf directory and all empty intermediate ones""" |
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262 return util.removedirs(self.join(path)) |
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263 |
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264 def rmdir(self, path: Optional[bytes] = None): |
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265 """Remove an empty directory.""" |
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266 return os.rmdir(self.join(path)) |
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267 |
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268 def rmtree( |
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269 self, path: Optional[bytes] = None, ignore_errors=False, forcibly=False |
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270 ): |
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271 """Remove a directory tree recursively |
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272 |
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273 If ``forcibly``, this tries to remove READ-ONLY files, too. |
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274 """ |
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275 if forcibly: |
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276 |
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277 def onerror(function, path, excinfo): |
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278 if function is not os.remove: |
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279 raise |
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280 # read-only files cannot be unlinked under Windows |
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281 s = os.stat(path) |
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282 if (s.st_mode & stat.S_IWRITE) != 0: |
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283 raise |
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284 os.chmod(path, stat.S_IMODE(s.st_mode) | stat.S_IWRITE) |
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285 os.remove(path) |
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286 |
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287 else: |
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288 onerror = None |
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289 return shutil.rmtree( |
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290 self.join(path), ignore_errors=ignore_errors, onerror=onerror |
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291 ) |
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292 |
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293 def setflags(self, path: bytes, l: bool, x: bool): |
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294 return util.setflags(self.join(path), l, x) |
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295 |
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296 def stat(self, path: Optional[bytes] = None): |
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297 return os.stat(self.join(path)) |
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298 |
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299 def unlink(self, path: Optional[bytes] = None): |
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300 return util.unlink(self.join(path)) |
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301 |
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302 def tryunlink(self, path: Optional[bytes] = None): |
31542 | 303 """Attempt to remove a file, ignoring missing file errors.""" |
304 util.tryunlink(self.join(path)) | |
305 | |
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306 def unlinkpath( |
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307 self, path: Optional[bytes] = None, ignoremissing=False, rmdir=True |
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308 ): |
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309 return util.unlinkpath( |
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310 self.join(path), ignoremissing=ignoremissing, rmdir=rmdir |
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311 ) |
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312 |
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313 def utime(self, path: Optional[bytes] = None, t=None): |
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314 return os.utime(self.join(path), t) |
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315 |
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316 def walk(self, path: Optional[bytes] = None, onerror=None): |
24725 | 317 """Yield (dirpath, dirs, files) tuple for each directories under path |
318 | |
319 ``dirpath`` is relative one from the root of this vfs. This | |
320 uses ``os.sep`` as path separator, even you specify POSIX | |
321 style ``path``. | |
322 | |
323 "The root of this vfs" is represented as empty ``dirpath``. | |
324 """ | |
325 root = os.path.normpath(self.join(None)) | |
326 # when dirpath == root, dirpath[prefixlen:] becomes empty | |
327 # because len(dirpath) < prefixlen. | |
328 prefixlen = len(pathutil.normasprefix(root)) | |
329 for dirpath, dirs, files in os.walk(self.join(path), onerror=onerror): | |
330 yield (dirpath[prefixlen:], dirs, files) | |
331 | |
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332 @contextlib.contextmanager |
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333 def backgroundclosing(self, ui, expectedcount=-1): |
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334 """Allow files to be closed asynchronously. |
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335 |
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336 When this context manager is active, ``backgroundclose`` can be passed |
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337 to ``__call__``/``open`` to result in the file possibly being closed |
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338 asynchronously, on a background thread. |
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339 """ |
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340 # Sharing backgroundfilecloser between threads is complex and using |
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341 # multiple instances puts us at risk of running out of file descriptors |
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342 # only allow to use backgroundfilecloser when in main thread. |
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343 if not isinstance( |
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344 threading.current_thread(), |
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345 threading._MainThread, # pytype: disable=module-attr |
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346 ): |
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347 yield |
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348 return |
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349 vfs = getattr(self, 'vfs', self) |
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350 if getattr(vfs, '_backgroundfilecloser', None): |
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351 raise error.Abort( |
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352 _(b'can only have 1 active background file closer') |
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353 ) |
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354 |
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355 with backgroundfilecloser(ui, expectedcount=expectedcount) as bfc: |
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356 try: |
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357 vfs._backgroundfilecloser = ( |
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358 bfc # pytype: disable=attribute-error |
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359 ) |
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360 yield bfc |
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361 finally: |
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362 vfs._backgroundfilecloser = ( |
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363 None # pytype: disable=attribute-error |
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364 ) |
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365 |
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366 def register_file(self, path): |
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367 """generic hook point to lets fncache steer its stew""" |
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368 |
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369 |
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370 class vfs(abstractvfs): |
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371 """Operate files relative to a base directory |
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372 |
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373 This class is used to hide the details of COW semantics and |
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374 remote file access from higher level code. |
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375 |
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376 'cacheaudited' should be enabled only if (a) vfs object is short-lived, or |
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377 (b) the base directory is managed by hg and considered sort-of append-only. |
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378 See pathutil.pathauditor() for details. |
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379 """ |
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380 |
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381 def __init__( |
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382 self, |
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383 base: bytes, |
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384 audit=True, |
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385 cacheaudited=False, |
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386 expandpath=False, |
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387 realpath=False, |
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388 ): |
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389 if expandpath: |
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390 base = util.expandpath(base) |
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391 if realpath: |
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392 base = os.path.realpath(base) |
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393 self.base = base |
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394 self._audit = audit |
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395 if audit: |
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396 self.audit = pathutil.pathauditor(self.base, cached=cacheaudited) |
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397 else: |
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398 self.audit = lambda path, mode=None: True |
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399 self.createmode = None |
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400 self._trustnlink = None |
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401 self.options = {} |
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402 |
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403 @util.propertycache |
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404 def _cansymlink(self) -> bool: |
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405 return util.checklink(self.base) |
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406 |
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407 @util.propertycache |
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408 def _chmod(self): |
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409 return util.checkexec(self.base) |
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410 |
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411 def _fixfilemode(self, name): |
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412 if self.createmode is None or not self._chmod: |
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413 return |
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414 os.chmod(name, self.createmode & 0o666) |
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415 |
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416 def _auditpath(self, path, mode) -> None: |
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417 if self._audit: |
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418 if os.path.isabs(path) and path.startswith(self.base): |
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419 path = os.path.relpath(path, self.base) |
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420 r = util.checkosfilename(path) |
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421 if r: |
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422 raise error.Abort(b"%s: %r" % (r, path)) |
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423 self.audit(path, mode=mode) |
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424 |
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425 def isfileorlink_checkdir( |
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426 self, dircache, path: Optional[bytes] = None |
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427 ) -> bool: |
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428 """return True if the path is a regular file or a symlink and |
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429 the directories along the path are "normal", that is |
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430 not symlinks or nested hg repositories. |
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431 |
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432 Ignores the `_audit` setting, and checks the directories regardless. |
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433 `dircache` is used to cache the directory checks. |
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434 """ |
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435 try: |
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436 for prefix in pathutil.finddirs_rev_noroot(util.localpath(path)): |
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437 if prefix in dircache: |
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438 res = dircache[prefix] |
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439 else: |
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440 res = pathutil.pathauditor._checkfs_exists( |
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441 self.base, prefix, path |
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442 ) |
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443 dircache[prefix] = res |
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444 if not res: |
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445 return False |
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446 except (OSError, error.Abort): |
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447 return False |
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448 return self.isfileorlink(path) |
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449 |
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450 def __call__( |
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451 self, |
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452 path: bytes, |
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453 mode: bytes = b"rb", |
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454 atomictemp=False, |
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455 notindexed=False, |
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456 backgroundclose=False, |
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457 checkambig=False, |
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458 auditpath=True, |
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459 makeparentdirs=True, |
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460 ): |
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461 """Open ``path`` file, which is relative to vfs root. |
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462 |
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463 By default, parent directories are created as needed. Newly created |
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464 directories are marked as "not to be indexed by the content indexing |
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465 service", if ``notindexed`` is specified for "write" mode access. |
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466 Set ``makeparentdirs=False`` to not create directories implicitly. |
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467 |
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468 If ``backgroundclose`` is passed, the file may be closed asynchronously. |
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469 It can only be used if the ``self.backgroundclosing()`` context manager |
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470 is active. This should only be specified if the following criteria hold: |
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471 |
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472 1. There is a potential for writing thousands of files. Unless you |
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473 are writing thousands of files, the performance benefits of |
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474 asynchronously closing files is not realized. |
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475 2. Files are opened exactly once for the ``backgroundclosing`` |
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476 active duration and are therefore free of race conditions between |
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477 closing a file on a background thread and reopening it. (If the |
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478 file were opened multiple times, there could be unflushed data |
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479 because the original file handle hasn't been flushed/closed yet.) |
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480 |
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481 ``checkambig`` argument is passed to atomictempfile (valid |
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482 only for writing), and is useful only if target file is |
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483 guarded by any lock (e.g. repo.lock or repo.wlock). |
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484 |
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485 To avoid file stat ambiguity forcibly, checkambig=True involves |
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486 copying ``path`` file opened in "append" mode (e.g. for |
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487 truncation), if it is owned by another. Therefore, use |
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488 combination of append mode and checkambig=True only in limited |
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489 cases (see also issue5418 and issue5584 for detail). |
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490 """ |
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491 if auditpath: |
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492 self._auditpath(path, mode) |
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493 f = self.join(path) |
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494 |
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495 if b"b" not in mode: |
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496 mode += b"b" # for that other OS |
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497 |
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498 nlink = -1 |
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499 if mode not in (b'r', b'rb'): |
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500 dirname, basename = util.split(f) |
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501 # If basename is empty, then the path is malformed because it points |
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502 # to a directory. Let the posixfile() call below raise IOError. |
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503 if basename: |
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504 if atomictemp: |
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505 if makeparentdirs: |
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506 util.makedirs(dirname, self.createmode, notindexed) |
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507 return util.atomictempfile( |
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508 f, mode, self.createmode, checkambig=checkambig |
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509 ) |
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510 try: |
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511 if b'w' in mode: |
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512 util.unlink(f) |
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513 nlink = 0 |
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514 else: |
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515 # nlinks() may behave differently for files on Windows |
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516 # shares if the file is open. |
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517 with util.posixfile(f): |
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518 nlink = util.nlinks(f) |
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519 if nlink < 1: |
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520 nlink = 2 # force mktempcopy (issue1922) |
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521 except FileNotFoundError: |
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522 nlink = 0 |
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523 if makeparentdirs: |
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524 util.makedirs(dirname, self.createmode, notindexed) |
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525 if nlink > 0: |
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526 if self._trustnlink is None: |
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527 self._trustnlink = nlink > 1 or util.checknlink(f) |
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528 if nlink > 1 or not self._trustnlink: |
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529 util.rename(util.mktempcopy(f), f) |
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530 fp = util.posixfile(f, mode) |
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531 if nlink == 0: |
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532 self._fixfilemode(f) |
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533 |
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534 if checkambig: |
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535 if mode in (b'r', b'rb'): |
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536 raise error.Abort( |
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537 _( |
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538 b'implementation error: mode %s is not' |
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539 b' valid for checkambig=True' |
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540 ) |
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541 % mode |
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542 ) |
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543 fp = checkambigatclosing(fp) |
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544 |
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545 if backgroundclose and isinstance( |
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546 threading.current_thread(), |
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547 threading._MainThread, # pytype: disable=module-attr |
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548 ): |
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549 if ( |
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550 not self._backgroundfilecloser # pytype: disable=attribute-error |
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551 ): |
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552 raise error.Abort( |
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553 _( |
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554 b'backgroundclose can only be used when a ' |
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555 b'backgroundclosing context manager is active' |
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556 ) |
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557 ) |
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|
558 |
43484
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|
559 fp = delayclosedfile( |
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parents:
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|
560 fp, |
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parents:
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diff
changeset
|
561 self._backgroundfilecloser, # pytype: disable=attribute-error |
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parents:
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|
562 ) |
27895
2d6a89e79b48
scmutil: support background file closing
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
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|
563 |
13970
d13913355390
move opener from util to scmutil
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parents:
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diff
changeset
|
564 return fp |
d13913355390
move opener from util to scmutil
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parents:
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diff
changeset
|
565 |
49573
cc9a60050a07
typing: add basic type hints to vfs.py
Matt Harbison <matt_harbison@yahoo.com>
parents:
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diff
changeset
|
566 def symlink(self, src: bytes, dst: bytes) -> None: |
18327
4aecdb91443c
scmutil: simplify vfs.audit - drop wrapped vfs.auditor
Mads Kiilerich <mads@kiilerich.com>
parents:
18316
diff
changeset
|
567 self.audit(dst) |
16199
8181bd808dc5
scmutil: add join method to opener to construct path relative to base
Idan Kamara <idankk86@gmail.com>
parents:
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diff
changeset
|
568 linkname = self.join(dst) |
31549 | 569 util.tryunlink(linkname) |
13970
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move opener from util to scmutil
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parents:
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diff
changeset
|
570 |
29017
07be86828e79
util: fix race in makedirs()
Adam Simpkins <simpkins@fb.com>
parents:
28819
diff
changeset
|
571 util.makedirs(os.path.dirname(linkname), self.createmode) |
13970
d13913355390
move opener from util to scmutil
Adrian Buehlmann <adrian@cadifra.com>
parents:
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diff
changeset
|
572 |
14261
e3649bcca3f6
opener: rename _can_symlink to _cansymlink
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parents:
14236
diff
changeset
|
573 if self._cansymlink: |
13970
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diff
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|
574 try: |
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diff
changeset
|
575 os.symlink(src, linkname) |
25660
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|
576 except OSError as err: |
43076
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|
577 raise OSError( |
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|
578 err.errno, |
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diff
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|
579 _(b'could not symlink to %r: %s') |
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580 % (src, encoding.strtolocal(err.strerror)), |
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|
581 linkname, |
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|
582 ) |
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diff
changeset
|
583 else: |
17768
9837cafc25b1
vfs: use self.write to write symlink placeholders
Matt Mackall <mpm@selenic.com>
parents:
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diff
changeset
|
584 self.write(dst, src) |
13971
bfeaa88b875d
move canonpath from util to scmutil
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parents:
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diff
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|
585 |
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parents:
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changeset
|
586 def join(self, path: Optional[bytes], *insidef: bytes) -> bytes: |
17161
be016e96117a
localrepo: use file API via vfs while ensuring repository directory
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
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diff
changeset
|
587 if path: |
47809
98c3fa6a3ac2
vfs: always use / as file separator (issue6546)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47443
diff
changeset
|
588 parts = [self.base, path] |
98c3fa6a3ac2
vfs: always use / as file separator (issue6546)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
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|
589 parts.extend(insidef) |
98c3fa6a3ac2
vfs: always use / as file separator (issue6546)
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parents:
47443
diff
changeset
|
590 return self._join(*parts) |
17681
a41fd730f230
scmutil: backout 83785bb56062 (issue3643)
Matt Mackall <mpm@selenic.com>
parents:
17675
diff
changeset
|
591 else: |
a41fd730f230
scmutil: backout 83785bb56062 (issue3643)
Matt Mackall <mpm@selenic.com>
parents:
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diff
changeset
|
592 return self.base |
16199
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parents:
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diff
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|
593 |
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diff
changeset
|
594 |
17649
f65c6a5f256c
scmutil: rename classes from "opener" to "vfs"
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parents:
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diff
changeset
|
595 opener = vfs |
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diff
changeset
|
596 |
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diff
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|
597 |
41093
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vfs: fix proxyvfs inheritance
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parents:
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diff
changeset
|
598 class proxyvfs(abstractvfs): |
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Matt Harbison <matt_harbison@yahoo.com>
parents:
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|
599 def __init__(self, vfs: "vfs"): |
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408ded42c5ec
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parents:
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|
600 self.vfs = vfs |
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parents:
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diff
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|
601 |
50365
d1d458fb96a5
vfsproxy: inherit the `createmode` attribute too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
changeset
|
602 @property |
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vfsproxy: inherit the `createmode` attribute too
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diff
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|
603 def createmode(self): |
d1d458fb96a5
vfsproxy: inherit the `createmode` attribute too
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
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|
604 return self.vfs.createmode |
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vfsproxy: inherit the `createmode` attribute too
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parents:
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diff
changeset
|
605 |
41094
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vfs: handle _auditpath in proxyvfs
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parents:
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diff
changeset
|
606 def _auditpath(self, path, mode): |
adee334d94cd
vfs: handle _auditpath in proxyvfs
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parents:
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|
607 return self.vfs._auditpath(path, mode) |
adee334d94cd
vfs: handle _auditpath in proxyvfs
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parents:
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diff
changeset
|
608 |
27879
52a4ad62b006
cleanup: use modern @property/@foo.setter property specification
Augie Fackler <augie@google.com>
parents:
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diff
changeset
|
609 @property |
29714
69109052d9ac
auditvfs: forward options property from nested vfs
Augie Fackler <augie@google.com>
parents:
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diff
changeset
|
610 def options(self): |
69109052d9ac
auditvfs: forward options property from nested vfs
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parents:
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diff
changeset
|
611 return self.vfs.options |
69109052d9ac
auditvfs: forward options property from nested vfs
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parents:
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diff
changeset
|
612 |
69109052d9ac
auditvfs: forward options property from nested vfs
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diff
changeset
|
613 @options.setter |
69109052d9ac
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|
614 def options(self, value): |
69109052d9ac
auditvfs: forward options property from nested vfs
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parents:
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diff
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|
615 self.vfs.options = value |
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|
616 |
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|
617 |
41093
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diff
changeset
|
618 class filtervfs(proxyvfs, abstractvfs): |
17649
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diff
changeset
|
619 '''Wrapper vfs for filtering filenames with a function.''' |
14090
e24b5e3c2f27
add filteropener abstraction for store openers
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parents:
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diff
changeset
|
620 |
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changeset
|
621 def __init__(self, vfs: "vfs", filter): |
33412
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parents:
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|
622 proxyvfs.__init__(self, vfs) |
14090
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diff
changeset
|
623 self._filter = filter |
e24b5e3c2f27
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diff
changeset
|
624 |
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diff
changeset
|
625 def __call__(self, path: bytes, *args, **kwargs): |
17846
f42cf30873dc
scmutil: add mustaudit delegation to filtervfs (issue3673)
Bryan O'Sullivan <bryano@fb.com>
parents:
17845
diff
changeset
|
626 return self.vfs(self._filter(path), *args, **kwargs) |
14090
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add filteropener abstraction for store openers
Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents:
14089
diff
changeset
|
627 |
49573
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parents:
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diff
changeset
|
628 def join(self, path: Optional[bytes], *insidef: bytes) -> bytes: |
17725
ffd589d4b785
vfs: define "join()" in each classes derived from "abstractvfs"
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
17723
diff
changeset
|
629 if path: |
24628
a0b47885a1c5
vfs: make it possible to pass multiple path elements to join
Matt Harbison <matt_harbison@yahoo.com>
parents:
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diff
changeset
|
630 return self.vfs.join(self._filter(self.vfs.reljoin(path, *insidef))) |
17725
ffd589d4b785
vfs: define "join()" in each classes derived from "abstractvfs"
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
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diff
changeset
|
631 else: |
17846
f42cf30873dc
scmutil: add mustaudit delegation to filtervfs (issue3673)
Bryan O'Sullivan <bryano@fb.com>
parents:
17845
diff
changeset
|
632 return self.vfs.join(path) |
17725
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vfs: define "join()" in each classes derived from "abstractvfs"
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parents:
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diff
changeset
|
633 |
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changeset
|
634 |
17649
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scmutil: rename classes from "opener" to "vfs"
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parents:
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diff
changeset
|
635 filteropener = filtervfs |
f65c6a5f256c
scmutil: rename classes from "opener" to "vfs"
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parents:
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diff
changeset
|
636 |
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changeset
|
637 |
41093
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vfs: fix proxyvfs inheritance
Boris Feld <boris.feld@octobus.net>
parents:
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diff
changeset
|
638 class readonlyvfs(proxyvfs): |
18213
c38a62af000e
vfs: add a read only vfs
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents:
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diff
changeset
|
639 '''Wrapper vfs preventing any writing.''' |
c38a62af000e
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parents:
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diff
changeset
|
640 |
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changeset
|
641 def __init__(self, vfs: "vfs"): |
33412
a42369e04aee
vfs: rename auditvfs to proxyvfs
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
642 proxyvfs.__init__(self, vfs) |
18213
c38a62af000e
vfs: add a read only vfs
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents:
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diff
changeset
|
643 |
49574
2506c3ac73f4
vfs: make the default opener mode binary
Matt Harbison <matt_harbison@yahoo.com>
parents:
49573
diff
changeset
|
644 def __call__(self, path: bytes, mode: bytes = b'rb', *args, **kw): |
43077
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diff
changeset
|
645 if mode not in (b'r', b'rb'): |
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Augie Fackler <augie@google.com>
parents:
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diff
changeset
|
646 raise error.Abort(_(b'this vfs is read only')) |
18213
c38a62af000e
vfs: add a read only vfs
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents:
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diff
changeset
|
647 return self.vfs(path, mode, *args, **kw) |
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parents:
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diff
changeset
|
648 |
49573
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Matt Harbison <matt_harbison@yahoo.com>
parents:
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diff
changeset
|
649 def join(self, path: Optional[bytes], *insidef: bytes) -> bytes: |
26156
a112fffdb632
scmutil.readonlyvfs: implement join
Siddharth Agarwal <sid0@fb.com>
parents:
26098
diff
changeset
|
650 return self.vfs.join(path, *insidef) |
18213
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parents:
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changeset
|
651 |
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changeset
|
652 |
48946
642e31cb55f0
py3: use class X: instead of class X(object):
Gregory Szorc <gregory.szorc@gmail.com>
parents:
48875
diff
changeset
|
653 class closewrapbase: |
29994
0c40e64d6154
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FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
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diff
changeset
|
654 """Base class of wrapper, which hooks closing |
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|
655 |
2d6a89e79b48
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changeset
|
656 Do not instantiate outside of the vfs layer. |
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parents:
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|
657 """ |
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changeset
|
658 |
29994
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parents:
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diff
changeset
|
659 def __init__(self, fh): |
43506
9f70512ae2cf
cleanup: remove pointless r-prefixes on single-quoted strings
Augie Fackler <augie@google.com>
parents:
43484
diff
changeset
|
660 object.__setattr__(self, '_origfh', fh) |
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parents:
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changeset
|
661 |
2d6a89e79b48
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parents:
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changeset
|
662 def __getattr__(self, attr): |
2d6a89e79b48
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parents:
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changeset
|
663 return getattr(self._origfh, attr) |
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|
664 |
2d6a89e79b48
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
665 def __setattr__(self, attr, value): |
2d6a89e79b48
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diff
changeset
|
666 return setattr(self._origfh, attr, value) |
2d6a89e79b48
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parents:
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diff
changeset
|
667 |
2d6a89e79b48
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parents:
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diff
changeset
|
668 def __delattr__(self, attr): |
2d6a89e79b48
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parents:
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diff
changeset
|
669 return delattr(self._origfh, attr) |
2d6a89e79b48
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parents:
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diff
changeset
|
670 |
2d6a89e79b48
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parents:
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diff
changeset
|
671 def __enter__(self): |
40939
8d9f366b7f19
vfs: ensure closewrapbase fh doesn't escape by entering context manager
Matt Harbison <matt_harbison@yahoo.com>
parents:
39904
diff
changeset
|
672 self._origfh.__enter__() |
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673 return self |
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674 |
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675 def __exit__(self, exc_type, exc_value, exc_tb): |
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676 raise NotImplementedError('attempted instantiating ' + str(type(self))) |
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677 |
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678 def close(self): |
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679 raise NotImplementedError('attempted instantiating ' + str(type(self))) |
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680 |
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681 |
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682 class delayclosedfile(closewrapbase): |
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683 """Proxy for a file object whose close is delayed. |
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684 |
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685 Do not instantiate outside of the vfs layer. |
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686 """ |
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687 |
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688 def __init__(self, fh, closer): |
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689 super(delayclosedfile, self).__init__(fh) |
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690 object.__setattr__(self, '_closer', closer) |
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691 |
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692 def __exit__(self, exc_type, exc_value, exc_tb): |
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693 self._closer.close(self._origfh) |
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694 |
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695 def close(self): |
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696 self._closer.close(self._origfh) |
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697 |
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698 |
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699 class backgroundfilecloser: |
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700 """Coordinates background closing of file handles on multiple threads.""" |
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701 |
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702 def __init__(self, ui, expectedcount=-1): |
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703 self._running = False |
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704 self._entered = False |
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705 self._threads = [] |
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706 self._threadexception = None |
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707 |
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708 # Only Windows/NTFS has slow file closing. So only enable by default |
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709 # on that platform. But allow to be enabled elsewhere for testing. |
34645 | 710 defaultenabled = pycompat.iswindows |
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711 enabled = ui.configbool(b'worker', b'backgroundclose', defaultenabled) |
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712 |
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|
713 if not enabled: |
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|
714 return |
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|
715 |
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|
716 # There is overhead to starting and stopping the background threads. |
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717 # Don't do background processing unless the file count is large enough |
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718 # to justify it. |
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719 minfilecount = ui.configint(b'worker', b'backgroundcloseminfilecount') |
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720 # FUTURE dynamically start background threads after minfilecount closes. |
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721 # (We don't currently have any callers that don't know their file count) |
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722 if expectedcount > 0 and expectedcount < minfilecount: |
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|
723 return |
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|
724 |
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|
725 maxqueue = ui.configint(b'worker', b'backgroundclosemaxqueue') |
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726 threadcount = ui.configint(b'worker', b'backgroundclosethreadcount') |
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|
727 |
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|
728 ui.debug( |
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|
729 b'starting %d threads for background file closing\n' % threadcount |
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|
730 ) |
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|
731 |
37844
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|
732 self._queue = pycompat.queue.Queue(maxsize=maxqueue) |
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|
733 self._running = True |
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|
734 |
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changeset
|
735 for i in range(threadcount): |
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|
736 t = threading.Thread(target=self._worker, name='backgroundcloser') |
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|
737 self._threads.append(t) |
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|
738 t.start() |
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|
739 |
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|
740 def __enter__(self): |
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|
741 self._entered = True |
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|
742 return self |
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|
743 |
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|
744 def __exit__(self, exc_type, exc_value, exc_tb): |
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|
745 self._running = False |
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|
746 |
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changeset
|
747 # Wait for threads to finish closing so open files don't linger for |
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|
748 # longer than lifetime of context manager. |
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changeset
|
749 for t in self._threads: |
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diff
changeset
|
750 t.join() |
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changeset
|
751 |
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|
752 def _worker(self): |
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|
753 """Main routine for worker thread.""" |
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|
754 while True: |
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|
755 try: |
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|
756 fh = self._queue.get(block=True, timeout=0.100) |
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|
757 # Need to catch or the thread will terminate and |
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|
758 # we could orphan file descriptors. |
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|
759 try: |
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|
760 fh.close() |
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|
761 except Exception as e: |
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|
762 # Stash so can re-raise from main thread later. |
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|
763 self._threadexception = e |
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|
764 except pycompat.queue.Empty: |
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|
765 if not self._running: |
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|
766 break |
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changeset
|
767 |
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changeset
|
768 def close(self, fh): |
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|
769 """Schedule a file for closing.""" |
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|
770 if not self._entered: |
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|
771 raise error.Abort( |
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cleanup: join string literals that are already on one line
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parents:
43090
diff
changeset
|
772 _(b'can only call close() when context manager active') |
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|
773 ) |
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|
774 |
2d6a89e79b48
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diff
changeset
|
775 # If a background thread encountered an exception, raise now so we fail |
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|
776 # fast. Otherwise we may potentially go on for minutes until the error |
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|
777 # is acted on. |
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|
778 if self._threadexception: |
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|
779 e = self._threadexception |
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|
780 self._threadexception = None |
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diff
changeset
|
781 raise e |
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diff
changeset
|
782 |
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diff
changeset
|
783 # If we're not actively running, close synchronously. |
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diff
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|
784 if not self._running: |
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diff
changeset
|
785 fh.close() |
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changeset
|
786 return |
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diff
changeset
|
787 |
2d6a89e79b48
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diff
changeset
|
788 self._queue.put(fh, block=True, timeout=None) |
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57830bd0e787
scmutil: add file object wrapper class to check ambiguity at closing
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changeset
|
789 |
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790 |
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791 class checkambigatclosing(closewrapbase): |
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792 """Proxy for a file object, to avoid ambiguity of file stat |
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793 |
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794 See also util.filestat for detail about "ambiguity of file stat". |
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795 |
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796 This proxy is useful only if the target file is guarded by any |
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797 lock (e.g. repo.lock or repo.wlock) |
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798 |
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799 Do not instantiate outside of the vfs layer. |
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800 """ |
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801 |
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802 def __init__(self, fh): |
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803 super(checkambigatclosing, self).__init__(fh) |
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804 object.__setattr__(self, '_oldstat', util.filestat.frompath(fh.name)) |
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805 |
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806 def _checkambig(self): |
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807 oldstat = self._oldstat |
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808 if oldstat.stat: |
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809 _avoidambig(self._origfh.name, oldstat) |
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810 |
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811 def __exit__(self, exc_type, exc_value, exc_tb): |
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812 self._origfh.__exit__(exc_type, exc_value, exc_tb) |
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813 self._checkambig() |
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814 |
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815 def close(self): |
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816 self._origfh.close() |
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817 self._checkambig() |