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@@ -1,417 +1,418 b'' | |||
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1 | 1 | # streamclone.py - producing and consuming streaming repository data |
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2 | 2 | # |
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3 | 3 | # Copyright 2015 Gregory Szorc <gregory.szorc@gmail.com> |
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4 | 4 | # |
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5 | 5 | # This software may be used and distributed according to the terms of the |
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6 | 6 | # GNU General Public License version 2 or any later version. |
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7 | 7 | |
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8 | 8 | from __future__ import absolute_import |
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9 | 9 | |
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10 | 10 | import struct |
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11 | 11 | |
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12 | 12 | from .i18n import _ |
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13 | 13 | from . import ( |
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14 | 14 | branchmap, |
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15 | 15 | error, |
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16 | 16 | phases, |
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17 | 17 | store, |
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18 | 18 | util, |
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19 | 19 | ) |
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20 | 20 | |
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21 | 21 | def canperformstreamclone(pullop, bailifbundle2supported=False): |
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22 | 22 | """Whether it is possible to perform a streaming clone as part of pull. |
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23 | 23 | |
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24 | 24 | ``bailifbundle2supported`` will cause the function to return False if |
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25 | 25 | bundle2 stream clones are supported. It should only be called by the |
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26 | 26 | legacy stream clone code path. |
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27 | 27 | |
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28 | 28 | Returns a tuple of (supported, requirements). ``supported`` is True if |
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29 | 29 | streaming clone is supported and False otherwise. ``requirements`` is |
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30 | 30 | a set of repo requirements from the remote, or ``None`` if stream clone |
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31 | 31 | isn't supported. |
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32 | 32 | """ |
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33 | 33 | repo = pullop.repo |
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34 | 34 | remote = pullop.remote |
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35 | 35 | |
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36 | 36 | bundle2supported = False |
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37 | 37 | if pullop.canusebundle2: |
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38 | 38 | if 'v1' in pullop.remotebundle2caps.get('stream', []): |
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39 | 39 | bundle2supported = True |
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40 | 40 | # else |
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41 | 41 | # Server doesn't support bundle2 stream clone or doesn't support |
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42 | 42 | # the versions we support. Fall back and possibly allow legacy. |
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43 | 43 | |
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44 | 44 | # Ensures legacy code path uses available bundle2. |
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45 | 45 | if bailifbundle2supported and bundle2supported: |
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46 | 46 | return False, None |
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47 | 47 | # Ensures bundle2 doesn't try to do a stream clone if it isn't supported. |
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48 | 48 | #elif not bailifbundle2supported and not bundle2supported: |
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49 | 49 | # return False, None |
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50 | 50 | |
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51 | 51 | # Streaming clone only works on empty repositories. |
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52 | 52 | if len(repo): |
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53 | 53 | return False, None |
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54 | 54 | |
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55 | 55 | # Streaming clone only works if all data is being requested. |
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56 | 56 | if pullop.heads: |
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57 | 57 | return False, None |
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58 | 58 | |
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59 | 59 | streamrequested = pullop.streamclonerequested |
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60 | 60 | |
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61 | 61 | # If we don't have a preference, let the server decide for us. This |
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62 | 62 | # likely only comes into play in LANs. |
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63 | 63 | if streamrequested is None: |
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64 | 64 | # The server can advertise whether to prefer streaming clone. |
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65 | 65 | streamrequested = remote.capable('stream-preferred') |
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66 | 66 | |
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67 | 67 | if not streamrequested: |
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68 | 68 | return False, None |
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69 | 69 | |
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70 | 70 | # In order for stream clone to work, the client has to support all the |
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71 | 71 | # requirements advertised by the server. |
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72 | 72 | # |
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73 | 73 | # The server advertises its requirements via the "stream" and "streamreqs" |
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74 | 74 | # capability. "stream" (a value-less capability) is advertised if and only |
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75 | 75 | # if the only requirement is "revlogv1." Else, the "streamreqs" capability |
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76 | 76 | # is advertised and contains a comma-delimited list of requirements. |
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77 | 77 | requirements = set() |
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78 | 78 | if remote.capable('stream'): |
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79 | 79 | requirements.add('revlogv1') |
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80 | 80 | else: |
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81 | 81 | streamreqs = remote.capable('streamreqs') |
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82 | 82 | # This is weird and shouldn't happen with modern servers. |
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83 | 83 | if not streamreqs: |
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84 | 84 | pullop.repo.ui.warn(_( |
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85 | 85 | 'warning: stream clone requested but server has them ' |
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86 | 86 | 'disabled\n')) |
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87 | 87 | return False, None |
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88 | 88 | |
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89 | 89 | streamreqs = set(streamreqs.split(',')) |
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90 | 90 | # Server requires something we don't support. Bail. |
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91 | 91 | missingreqs = streamreqs - repo.supportedformats |
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92 | 92 | if missingreqs: |
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93 | 93 | pullop.repo.ui.warn(_( |
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94 | 94 | 'warning: stream clone requested but client is missing ' |
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95 | 95 | 'requirements: %s\n') % ', '.join(sorted(missingreqs))) |
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96 | 96 | pullop.repo.ui.warn( |
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97 | 97 | _('(see https://www.mercurial-scm.org/wiki/MissingRequirement ' |
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98 | 98 | 'for more information)\n')) |
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99 | 99 | return False, None |
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100 | 100 | requirements = streamreqs |
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101 | 101 | |
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102 | 102 | return True, requirements |
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103 | 103 | |
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104 | 104 | def maybeperformlegacystreamclone(pullop): |
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105 | 105 | """Possibly perform a legacy stream clone operation. |
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106 | 106 | |
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107 | 107 | Legacy stream clones are performed as part of pull but before all other |
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108 | 108 | operations. |
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109 | 109 | |
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110 | 110 | A legacy stream clone will not be performed if a bundle2 stream clone is |
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111 | 111 | supported. |
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112 | 112 | """ |
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113 | 113 | supported, requirements = canperformstreamclone(pullop) |
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114 | 114 | |
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115 | 115 | if not supported: |
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116 | 116 | return |
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117 | 117 | |
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118 | 118 | repo = pullop.repo |
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119 | 119 | remote = pullop.remote |
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120 | 120 | |
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121 | 121 | # Save remote branchmap. We will use it later to speed up branchcache |
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122 | 122 | # creation. |
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123 | 123 | rbranchmap = None |
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124 | 124 | if remote.capable('branchmap'): |
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125 | 125 | rbranchmap = remote.branchmap() |
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126 | 126 | |
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127 | 127 | repo.ui.status(_('streaming all changes\n')) |
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128 | 128 | |
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129 | 129 | fp = remote.stream_out() |
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130 | 130 | l = fp.readline() |
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131 | 131 | try: |
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132 | 132 | resp = int(l) |
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133 | 133 | except ValueError: |
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134 | 134 | raise error.ResponseError( |
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135 | 135 | _('unexpected response from remote server:'), l) |
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136 | 136 | if resp == 1: |
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137 | 137 | raise error.Abort(_('operation forbidden by server')) |
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138 | 138 | elif resp == 2: |
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139 | 139 | raise error.Abort(_('locking the remote repository failed')) |
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140 | 140 | elif resp != 0: |
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141 | 141 | raise error.Abort(_('the server sent an unknown error code')) |
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142 | 142 | |
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143 | 143 | l = fp.readline() |
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144 | 144 | try: |
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145 | 145 | filecount, bytecount = map(int, l.split(' ', 1)) |
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146 | 146 | except (ValueError, TypeError): |
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147 | 147 | raise error.ResponseError( |
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148 | 148 | _('unexpected response from remote server:'), l) |
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149 | 149 | |
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150 | 150 | with repo.lock(): |
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151 | 151 | consumev1(repo, fp, filecount, bytecount) |
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152 | 152 | |
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153 | 153 | # new requirements = old non-format requirements + |
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154 | 154 | # new format-related remote requirements |
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155 | 155 | # requirements from the streamed-in repository |
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156 | 156 | repo.requirements = requirements | ( |
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157 | 157 | repo.requirements - repo.supportedformats) |
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158 | 158 | repo._applyopenerreqs() |
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159 | 159 | repo._writerequirements() |
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160 | 160 | |
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161 | 161 | if rbranchmap: |
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162 | 162 | branchmap.replacecache(repo, rbranchmap) |
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163 | 163 | |
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164 | 164 | repo.invalidate() |
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165 | 165 | |
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166 | 166 | def allowservergeneration(repo): |
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167 | 167 | """Whether streaming clones are allowed from the server.""" |
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168 | 168 | if not repo.ui.configbool('server', 'uncompressed', True, untrusted=True): |
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169 | 169 | return False |
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170 | 170 | |
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171 | 171 | # The way stream clone works makes it impossible to hide secret changesets. |
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172 | 172 | # So don't allow this by default. |
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173 | 173 | secret = phases.hassecret(repo) |
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174 | 174 | if secret: |
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175 | 175 | return repo.ui.configbool('server', 'uncompressedallowsecret') |
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176 | 176 | |
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177 | 177 | return True |
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178 | 178 | |
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179 | 179 | # This is it's own function so extensions can override it. |
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180 | 180 | def _walkstreamfiles(repo): |
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181 | 181 | return repo.store.walk() |
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182 | 182 | |
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183 | 183 | def generatev1(repo): |
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184 | 184 | """Emit content for version 1 of a streaming clone. |
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185 | 185 | |
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186 | 186 | This returns a 3-tuple of (file count, byte size, data iterator). |
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187 | 187 | |
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188 | 188 | The data iterator consists of N entries for each file being transferred. |
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189 | 189 | Each file entry starts as a line with the file name and integer size |
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190 | 190 | delimited by a null byte. |
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191 | 191 | |
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192 | 192 | The raw file data follows. Following the raw file data is the next file |
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193 | 193 | entry, or EOF. |
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194 | 194 | |
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195 | 195 | When used on the wire protocol, an additional line indicating protocol |
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196 | 196 | success will be prepended to the stream. This function is not responsible |
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197 | 197 | for adding it. |
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198 | 198 | |
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199 | 199 | This function will obtain a repository lock to ensure a consistent view of |
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200 | 200 | the store is captured. It therefore may raise LockError. |
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201 | 201 | """ |
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202 | 202 | entries = [] |
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203 | 203 | total_bytes = 0 |
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204 | 204 | # Get consistent snapshot of repo, lock during scan. |
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205 | 205 | with repo.lock(): |
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206 | 206 | repo.ui.debug('scanning\n') |
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207 | 207 | for name, ename, size in _walkstreamfiles(repo): |
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208 | 208 | if size: |
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209 | 209 | entries.append((name, size)) |
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210 | 210 | total_bytes += size |
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211 | 211 | |
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212 | 212 | repo.ui.debug('%d files, %d bytes to transfer\n' % |
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213 | 213 | (len(entries), total_bytes)) |
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214 | 214 | |
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215 | 215 | svfs = repo.svfs |
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216 | 216 | oldaudit = svfs.mustaudit |
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217 | 217 | debugflag = repo.ui.debugflag |
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218 | 218 | svfs.mustaudit = False |
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219 | 219 | |
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220 | 220 | def emitrevlogdata(): |
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221 | 221 | try: |
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222 | 222 | for name, size in entries: |
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223 | 223 | if debugflag: |
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224 | 224 | repo.ui.debug('sending %s (%d bytes)\n' % (name, size)) |
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225 | 225 | # partially encode name over the wire for backwards compat |
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226 | 226 | yield '%s\0%d\n' % (store.encodedir(name), size) |
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227 | 227 | if size <= 65536: |
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228 | with svfs(name, 'rb') as fp: | |
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228 | with svfs(name, 'rb', auditpath=False) as fp: | |
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229 | 229 | yield fp.read(size) |
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230 | 230 | else: |
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231 |
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231 | data = svfs(name, auditpath=False) | |
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232 | for chunk in util.filechunkiter(data, limit=size): | |
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232 | 233 | yield chunk |
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233 | 234 | finally: |
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234 | 235 | svfs.mustaudit = oldaudit |
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235 | 236 | |
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236 | 237 | return len(entries), total_bytes, emitrevlogdata() |
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237 | 238 | |
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238 | 239 | def generatev1wireproto(repo): |
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239 | 240 | """Emit content for version 1 of streaming clone suitable for the wire. |
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240 | 241 | |
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241 | 242 | This is the data output from ``generatev1()`` with a header line |
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242 | 243 | indicating file count and byte size. |
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243 | 244 | """ |
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244 | 245 | filecount, bytecount, it = generatev1(repo) |
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245 | 246 | yield '%d %d\n' % (filecount, bytecount) |
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246 | 247 | for chunk in it: |
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247 | 248 | yield chunk |
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248 | 249 | |
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249 | 250 | def generatebundlev1(repo, compression='UN'): |
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250 | 251 | """Emit content for version 1 of a stream clone bundle. |
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251 | 252 | |
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252 | 253 | The first 4 bytes of the output ("HGS1") denote this as stream clone |
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253 | 254 | bundle version 1. |
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254 | 255 | |
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255 | 256 | The next 2 bytes indicate the compression type. Only "UN" is currently |
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256 | 257 | supported. |
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257 | 258 | |
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258 | 259 | The next 16 bytes are two 64-bit big endian unsigned integers indicating |
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259 | 260 | file count and byte count, respectively. |
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260 | 261 | |
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261 | 262 | The next 2 bytes is a 16-bit big endian unsigned short declaring the length |
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262 | 263 | of the requirements string, including a trailing \0. The following N bytes |
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263 | 264 | are the requirements string, which is ASCII containing a comma-delimited |
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264 | 265 | list of repo requirements that are needed to support the data. |
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265 | 266 | |
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266 | 267 | The remaining content is the output of ``generatev1()`` (which may be |
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267 | 268 | compressed in the future). |
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268 | 269 | |
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269 | 270 | Returns a tuple of (requirements, data generator). |
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270 | 271 | """ |
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271 | 272 | if compression != 'UN': |
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272 | 273 | raise ValueError('we do not support the compression argument yet') |
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273 | 274 | |
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274 | 275 | requirements = repo.requirements & repo.supportedformats |
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275 | 276 | requires = ','.join(sorted(requirements)) |
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276 | 277 | |
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277 | 278 | def gen(): |
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278 | 279 | yield 'HGS1' |
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279 | 280 | yield compression |
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280 | 281 | |
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281 | 282 | filecount, bytecount, it = generatev1(repo) |
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282 | 283 | repo.ui.status(_('writing %d bytes for %d files\n') % |
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283 | 284 | (bytecount, filecount)) |
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284 | 285 | |
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285 | 286 | yield struct.pack('>QQ', filecount, bytecount) |
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286 | 287 | yield struct.pack('>H', len(requires) + 1) |
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287 | 288 | yield requires + '\0' |
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288 | 289 | |
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289 | 290 | # This is where we'll add compression in the future. |
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290 | 291 | assert compression == 'UN' |
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291 | 292 | |
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292 | 293 | seen = 0 |
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293 | 294 | repo.ui.progress(_('bundle'), 0, total=bytecount, unit=_('bytes')) |
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294 | 295 | |
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295 | 296 | for chunk in it: |
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296 | 297 | seen += len(chunk) |
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297 | 298 | repo.ui.progress(_('bundle'), seen, total=bytecount, |
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298 | 299 | unit=_('bytes')) |
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299 | 300 | yield chunk |
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300 | 301 | |
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301 | 302 | repo.ui.progress(_('bundle'), None) |
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302 | 303 | |
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303 | 304 | return requirements, gen() |
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304 | 305 | |
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305 | 306 | def consumev1(repo, fp, filecount, bytecount): |
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306 | 307 | """Apply the contents from version 1 of a streaming clone file handle. |
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307 | 308 | |
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308 | 309 | This takes the output from "stream_out" and applies it to the specified |
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309 | 310 | repository. |
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310 | 311 | |
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311 | 312 | Like "stream_out," the status line added by the wire protocol is not |
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312 | 313 | handled by this function. |
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313 | 314 | """ |
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314 | 315 | with repo.lock(): |
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315 | 316 | repo.ui.status(_('%d files to transfer, %s of data\n') % |
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316 | 317 | (filecount, util.bytecount(bytecount))) |
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317 | 318 | handled_bytes = 0 |
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318 | 319 | repo.ui.progress(_('clone'), 0, total=bytecount, unit=_('bytes')) |
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319 | 320 | start = util.timer() |
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320 | 321 | |
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321 | 322 | # TODO: get rid of (potential) inconsistency |
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322 | 323 | # |
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323 | 324 | # If transaction is started and any @filecache property is |
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324 | 325 | # changed at this point, it causes inconsistency between |
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325 | 326 | # in-memory cached property and streamclone-ed file on the |
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326 | 327 | # disk. Nested transaction prevents transaction scope "clone" |
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327 | 328 | # below from writing in-memory changes out at the end of it, |
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328 | 329 | # even though in-memory changes are discarded at the end of it |
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329 | 330 | # regardless of transaction nesting. |
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330 | 331 | # |
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331 | 332 | # But transaction nesting can't be simply prohibited, because |
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332 | 333 | # nesting occurs also in ordinary case (e.g. enabling |
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333 | 334 | # clonebundles). |
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334 | 335 | |
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335 | 336 | with repo.transaction('clone'): |
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336 | 337 | with repo.svfs.backgroundclosing(repo.ui, expectedcount=filecount): |
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337 | 338 | for i in xrange(filecount): |
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338 | 339 | # XXX doesn't support '\n' or '\r' in filenames |
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339 | 340 | l = fp.readline() |
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340 | 341 | try: |
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341 | 342 | name, size = l.split('\0', 1) |
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342 | 343 | size = int(size) |
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343 | 344 | except (ValueError, TypeError): |
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344 | 345 | raise error.ResponseError( |
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345 | 346 | _('unexpected response from remote server:'), l) |
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346 | 347 | if repo.ui.debugflag: |
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347 | 348 | repo.ui.debug('adding %s (%s)\n' % |
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348 | 349 | (name, util.bytecount(size))) |
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349 | 350 | # for backwards compat, name was partially encoded |
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350 | 351 | path = store.decodedir(name) |
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351 | 352 | with repo.svfs(path, 'w', backgroundclose=True) as ofp: |
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352 | 353 | for chunk in util.filechunkiter(fp, limit=size): |
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353 | 354 | handled_bytes += len(chunk) |
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354 | 355 | repo.ui.progress(_('clone'), handled_bytes, |
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355 | 356 | total=bytecount, unit=_('bytes')) |
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356 | 357 | ofp.write(chunk) |
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357 | 358 | |
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358 | 359 | # force @filecache properties to be reloaded from |
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359 | 360 | # streamclone-ed file at next access |
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360 | 361 | repo.invalidate(clearfilecache=True) |
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361 | 362 | |
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362 | 363 | elapsed = util.timer() - start |
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363 | 364 | if elapsed <= 0: |
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364 | 365 | elapsed = 0.001 |
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365 | 366 | repo.ui.progress(_('clone'), None) |
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366 | 367 | repo.ui.status(_('transferred %s in %.1f seconds (%s/sec)\n') % |
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367 | 368 | (util.bytecount(bytecount), elapsed, |
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368 | 369 | util.bytecount(bytecount / elapsed))) |
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369 | 370 | |
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370 | 371 | def readbundle1header(fp): |
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371 | 372 | compression = fp.read(2) |
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372 | 373 | if compression != 'UN': |
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373 | 374 | raise error.Abort(_('only uncompressed stream clone bundles are ' |
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374 | 375 | 'supported; got %s') % compression) |
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375 | 376 | |
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376 | 377 | filecount, bytecount = struct.unpack('>QQ', fp.read(16)) |
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377 | 378 | requireslen = struct.unpack('>H', fp.read(2))[0] |
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378 | 379 | requires = fp.read(requireslen) |
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379 | 380 | |
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380 | 381 | if not requires.endswith('\0'): |
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381 | 382 | raise error.Abort(_('malformed stream clone bundle: ' |
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382 | 383 | 'requirements not properly encoded')) |
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383 | 384 | |
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384 | 385 | requirements = set(requires.rstrip('\0').split(',')) |
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385 | 386 | |
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386 | 387 | return filecount, bytecount, requirements |
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387 | 388 | |
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388 | 389 | def applybundlev1(repo, fp): |
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389 | 390 | """Apply the content from a stream clone bundle version 1. |
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390 | 391 | |
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391 | 392 | We assume the 4 byte header has been read and validated and the file handle |
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392 | 393 | is at the 2 byte compression identifier. |
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393 | 394 | """ |
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394 | 395 | if len(repo): |
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395 | 396 | raise error.Abort(_('cannot apply stream clone bundle on non-empty ' |
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396 | 397 | 'repo')) |
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397 | 398 | |
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398 | 399 | filecount, bytecount, requirements = readbundle1header(fp) |
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399 | 400 | missingreqs = requirements - repo.supportedformats |
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400 | 401 | if missingreqs: |
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401 | 402 | raise error.Abort(_('unable to apply stream clone: ' |
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402 | 403 | 'unsupported format: %s') % |
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403 | 404 | ', '.join(sorted(missingreqs))) |
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404 | 405 | |
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405 | 406 | consumev1(repo, fp, filecount, bytecount) |
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406 | 407 | |
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407 | 408 | class streamcloneapplier(object): |
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408 | 409 | """Class to manage applying streaming clone bundles. |
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409 | 410 | |
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410 | 411 | We need to wrap ``applybundlev1()`` in a dedicated type to enable bundle |
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411 | 412 | readers to perform bundle type-specific functionality. |
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412 | 413 | """ |
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413 | 414 | def __init__(self, fh): |
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414 | 415 | self._fh = fh |
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415 | 416 | |
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416 | 417 | def apply(self, repo): |
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417 | 418 | return applybundlev1(repo, self._fh) |
@@ -1,641 +1,643 b'' | |||
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1 | 1 | # vfs.py - Mercurial 'vfs' classes |
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2 | 2 | # |
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3 | 3 | # Copyright Matt Mackall <mpm@selenic.com> |
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4 | 4 | # |
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5 | 5 | # This software may be used and distributed according to the terms of the |
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6 | 6 | # GNU General Public License version 2 or any later version. |
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7 | 7 | from __future__ import absolute_import |
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8 | 8 | |
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9 | 9 | import contextlib |
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10 | 10 | import errno |
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11 | 11 | import os |
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12 | 12 | import shutil |
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13 | 13 | import stat |
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14 | 14 | import tempfile |
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15 | 15 | import threading |
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16 | 16 | |
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17 | 17 | from .i18n import _ |
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18 | 18 | from . import ( |
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19 | 19 | error, |
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20 | 20 | pathutil, |
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21 | 21 | pycompat, |
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22 | 22 | util, |
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23 | 23 | ) |
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24 | 24 | |
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25 | 25 | class abstractvfs(object): |
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26 | 26 | """Abstract base class; cannot be instantiated""" |
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27 | 27 | |
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28 | 28 | def __init__(self, *args, **kwargs): |
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29 | 29 | '''Prevent instantiation; don't call this from subclasses.''' |
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30 | 30 | raise NotImplementedError('attempted instantiating ' + str(type(self))) |
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31 | 31 | |
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32 | 32 | def tryread(self, path): |
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33 | 33 | '''gracefully return an empty string for missing files''' |
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34 | 34 | try: |
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35 | 35 | return self.read(path) |
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36 | 36 | except IOError as inst: |
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37 | 37 | if inst.errno != errno.ENOENT: |
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38 | 38 | raise |
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39 | 39 | return "" |
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40 | 40 | |
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41 | 41 | def tryreadlines(self, path, mode='rb'): |
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42 | 42 | '''gracefully return an empty array for missing files''' |
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43 | 43 | try: |
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44 | 44 | return self.readlines(path, mode=mode) |
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45 | 45 | except IOError as inst: |
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46 | 46 | if inst.errno != errno.ENOENT: |
|
47 | 47 | raise |
|
48 | 48 | return [] |
|
49 | 49 | |
|
50 | 50 | @util.propertycache |
|
51 | 51 | def open(self): |
|
52 | 52 | '''Open ``path`` file, which is relative to vfs root. |
|
53 | 53 | |
|
54 | 54 | Newly created directories are marked as "not to be indexed by |
|
55 | 55 | the content indexing service", if ``notindexed`` is specified |
|
56 | 56 | for "write" mode access. |
|
57 | 57 | ''' |
|
58 | 58 | return self.__call__ |
|
59 | 59 | |
|
60 | 60 | def read(self, path): |
|
61 | 61 | with self(path, 'rb') as fp: |
|
62 | 62 | return fp.read() |
|
63 | 63 | |
|
64 | 64 | def readlines(self, path, mode='rb'): |
|
65 | 65 | with self(path, mode=mode) as fp: |
|
66 | 66 | return fp.readlines() |
|
67 | 67 | |
|
68 | 68 | def write(self, path, data, backgroundclose=False): |
|
69 | 69 | with self(path, 'wb', backgroundclose=backgroundclose) as fp: |
|
70 | 70 | return fp.write(data) |
|
71 | 71 | |
|
72 | 72 | def writelines(self, path, data, mode='wb', notindexed=False): |
|
73 | 73 | with self(path, mode=mode, notindexed=notindexed) as fp: |
|
74 | 74 | return fp.writelines(data) |
|
75 | 75 | |
|
76 | 76 | def append(self, path, data): |
|
77 | 77 | with self(path, 'ab') as fp: |
|
78 | 78 | return fp.write(data) |
|
79 | 79 | |
|
80 | 80 | def basename(self, path): |
|
81 | 81 | """return base element of a path (as os.path.basename would do) |
|
82 | 82 | |
|
83 | 83 | This exists to allow handling of strange encoding if needed.""" |
|
84 | 84 | return os.path.basename(path) |
|
85 | 85 | |
|
86 | 86 | def chmod(self, path, mode): |
|
87 | 87 | return os.chmod(self.join(path), mode) |
|
88 | 88 | |
|
89 | 89 | def dirname(self, path): |
|
90 | 90 | """return dirname element of a path (as os.path.dirname would do) |
|
91 | 91 | |
|
92 | 92 | This exists to allow handling of strange encoding if needed.""" |
|
93 | 93 | return os.path.dirname(path) |
|
94 | 94 | |
|
95 | 95 | def exists(self, path=None): |
|
96 | 96 | return os.path.exists(self.join(path)) |
|
97 | 97 | |
|
98 | 98 | def fstat(self, fp): |
|
99 | 99 | return util.fstat(fp) |
|
100 | 100 | |
|
101 | 101 | def isdir(self, path=None): |
|
102 | 102 | return os.path.isdir(self.join(path)) |
|
103 | 103 | |
|
104 | 104 | def isfile(self, path=None): |
|
105 | 105 | return os.path.isfile(self.join(path)) |
|
106 | 106 | |
|
107 | 107 | def islink(self, path=None): |
|
108 | 108 | return os.path.islink(self.join(path)) |
|
109 | 109 | |
|
110 | 110 | def isfileorlink(self, path=None): |
|
111 | 111 | '''return whether path is a regular file or a symlink |
|
112 | 112 | |
|
113 | 113 | Unlike isfile, this doesn't follow symlinks.''' |
|
114 | 114 | try: |
|
115 | 115 | st = self.lstat(path) |
|
116 | 116 | except OSError: |
|
117 | 117 | return False |
|
118 | 118 | mode = st.st_mode |
|
119 | 119 | return stat.S_ISREG(mode) or stat.S_ISLNK(mode) |
|
120 | 120 | |
|
121 | 121 | def reljoin(self, *paths): |
|
122 | 122 | """join various elements of a path together (as os.path.join would do) |
|
123 | 123 | |
|
124 | 124 | The vfs base is not injected so that path stay relative. This exists |
|
125 | 125 | to allow handling of strange encoding if needed.""" |
|
126 | 126 | return os.path.join(*paths) |
|
127 | 127 | |
|
128 | 128 | def split(self, path): |
|
129 | 129 | """split top-most element of a path (as os.path.split would do) |
|
130 | 130 | |
|
131 | 131 | This exists to allow handling of strange encoding if needed.""" |
|
132 | 132 | return os.path.split(path) |
|
133 | 133 | |
|
134 | 134 | def lexists(self, path=None): |
|
135 | 135 | return os.path.lexists(self.join(path)) |
|
136 | 136 | |
|
137 | 137 | def lstat(self, path=None): |
|
138 | 138 | return os.lstat(self.join(path)) |
|
139 | 139 | |
|
140 | 140 | def listdir(self, path=None): |
|
141 | 141 | return os.listdir(self.join(path)) |
|
142 | 142 | |
|
143 | 143 | def makedir(self, path=None, notindexed=True): |
|
144 | 144 | return util.makedir(self.join(path), notindexed) |
|
145 | 145 | |
|
146 | 146 | def makedirs(self, path=None, mode=None): |
|
147 | 147 | return util.makedirs(self.join(path), mode) |
|
148 | 148 | |
|
149 | 149 | def makelock(self, info, path): |
|
150 | 150 | return util.makelock(info, self.join(path)) |
|
151 | 151 | |
|
152 | 152 | def mkdir(self, path=None): |
|
153 | 153 | return os.mkdir(self.join(path)) |
|
154 | 154 | |
|
155 | 155 | def mkstemp(self, suffix='', prefix='tmp', dir=None, text=False): |
|
156 | 156 | fd, name = tempfile.mkstemp(suffix=suffix, prefix=prefix, |
|
157 | 157 | dir=self.join(dir), text=text) |
|
158 | 158 | dname, fname = util.split(name) |
|
159 | 159 | if dir: |
|
160 | 160 | return fd, os.path.join(dir, fname) |
|
161 | 161 | else: |
|
162 | 162 | return fd, fname |
|
163 | 163 | |
|
164 | 164 | def readdir(self, path=None, stat=None, skip=None): |
|
165 | 165 | return util.listdir(self.join(path), stat, skip) |
|
166 | 166 | |
|
167 | 167 | def readlock(self, path): |
|
168 | 168 | return util.readlock(self.join(path)) |
|
169 | 169 | |
|
170 | 170 | def rename(self, src, dst, checkambig=False): |
|
171 | 171 | """Rename from src to dst |
|
172 | 172 | |
|
173 | 173 | checkambig argument is used with util.filestat, and is useful |
|
174 | 174 | only if destination file is guarded by any lock |
|
175 | 175 | (e.g. repo.lock or repo.wlock). |
|
176 | 176 | """ |
|
177 | 177 | srcpath = self.join(src) |
|
178 | 178 | dstpath = self.join(dst) |
|
179 | 179 | oldstat = checkambig and util.filestat.frompath(dstpath) |
|
180 | 180 | if oldstat and oldstat.stat: |
|
181 | 181 | def dorename(spath, dpath): |
|
182 | 182 | ret = util.rename(spath, dpath) |
|
183 | 183 | newstat = util.filestat.frompath(dpath) |
|
184 | 184 | if newstat.isambig(oldstat): |
|
185 | 185 | # stat of renamed file is ambiguous to original one |
|
186 | 186 | return ret, newstat.avoidambig(dpath, oldstat) |
|
187 | 187 | return ret, True |
|
188 | 188 | ret, avoided = dorename(srcpath, dstpath) |
|
189 | 189 | if not avoided: |
|
190 | 190 | # simply copy to change owner of srcpath (see issue5418) |
|
191 | 191 | util.copyfile(dstpath, srcpath) |
|
192 | 192 | ret, avoided = dorename(srcpath, dstpath) |
|
193 | 193 | return ret |
|
194 | 194 | return util.rename(srcpath, dstpath) |
|
195 | 195 | |
|
196 | 196 | def readlink(self, path): |
|
197 | 197 | return os.readlink(self.join(path)) |
|
198 | 198 | |
|
199 | 199 | def removedirs(self, path=None): |
|
200 | 200 | """Remove a leaf directory and all empty intermediate ones |
|
201 | 201 | """ |
|
202 | 202 | return util.removedirs(self.join(path)) |
|
203 | 203 | |
|
204 | 204 | def rmtree(self, path=None, ignore_errors=False, forcibly=False): |
|
205 | 205 | """Remove a directory tree recursively |
|
206 | 206 | |
|
207 | 207 | If ``forcibly``, this tries to remove READ-ONLY files, too. |
|
208 | 208 | """ |
|
209 | 209 | if forcibly: |
|
210 | 210 | def onerror(function, path, excinfo): |
|
211 | 211 | if function is not os.remove: |
|
212 | 212 | raise |
|
213 | 213 | # read-only files cannot be unlinked under Windows |
|
214 | 214 | s = os.stat(path) |
|
215 | 215 | if (s.st_mode & stat.S_IWRITE) != 0: |
|
216 | 216 | raise |
|
217 | 217 | os.chmod(path, stat.S_IMODE(s.st_mode) | stat.S_IWRITE) |
|
218 | 218 | os.remove(path) |
|
219 | 219 | else: |
|
220 | 220 | onerror = None |
|
221 | 221 | return shutil.rmtree(self.join(path), |
|
222 | 222 | ignore_errors=ignore_errors, onerror=onerror) |
|
223 | 223 | |
|
224 | 224 | def setflags(self, path, l, x): |
|
225 | 225 | return util.setflags(self.join(path), l, x) |
|
226 | 226 | |
|
227 | 227 | def stat(self, path=None): |
|
228 | 228 | return os.stat(self.join(path)) |
|
229 | 229 | |
|
230 | 230 | def unlink(self, path=None): |
|
231 | 231 | return util.unlink(self.join(path)) |
|
232 | 232 | |
|
233 | 233 | def tryunlink(self, path=None): |
|
234 | 234 | """Attempt to remove a file, ignoring missing file errors.""" |
|
235 | 235 | util.tryunlink(self.join(path)) |
|
236 | 236 | |
|
237 | 237 | def unlinkpath(self, path=None, ignoremissing=False): |
|
238 | 238 | return util.unlinkpath(self.join(path), ignoremissing=ignoremissing) |
|
239 | 239 | |
|
240 | 240 | def utime(self, path=None, t=None): |
|
241 | 241 | return os.utime(self.join(path), t) |
|
242 | 242 | |
|
243 | 243 | def walk(self, path=None, onerror=None): |
|
244 | 244 | """Yield (dirpath, dirs, files) tuple for each directories under path |
|
245 | 245 | |
|
246 | 246 | ``dirpath`` is relative one from the root of this vfs. This |
|
247 | 247 | uses ``os.sep`` as path separator, even you specify POSIX |
|
248 | 248 | style ``path``. |
|
249 | 249 | |
|
250 | 250 | "The root of this vfs" is represented as empty ``dirpath``. |
|
251 | 251 | """ |
|
252 | 252 | root = os.path.normpath(self.join(None)) |
|
253 | 253 | # when dirpath == root, dirpath[prefixlen:] becomes empty |
|
254 | 254 | # because len(dirpath) < prefixlen. |
|
255 | 255 | prefixlen = len(pathutil.normasprefix(root)) |
|
256 | 256 | for dirpath, dirs, files in os.walk(self.join(path), onerror=onerror): |
|
257 | 257 | yield (dirpath[prefixlen:], dirs, files) |
|
258 | 258 | |
|
259 | 259 | @contextlib.contextmanager |
|
260 | 260 | def backgroundclosing(self, ui, expectedcount=-1): |
|
261 | 261 | """Allow files to be closed asynchronously. |
|
262 | 262 | |
|
263 | 263 | When this context manager is active, ``backgroundclose`` can be passed |
|
264 | 264 | to ``__call__``/``open`` to result in the file possibly being closed |
|
265 | 265 | asynchronously, on a background thread. |
|
266 | 266 | """ |
|
267 | 267 | # This is an arbitrary restriction and could be changed if we ever |
|
268 | 268 | # have a use case. |
|
269 | 269 | vfs = getattr(self, 'vfs', self) |
|
270 | 270 | if getattr(vfs, '_backgroundfilecloser', None): |
|
271 | 271 | raise error.Abort( |
|
272 | 272 | _('can only have 1 active background file closer')) |
|
273 | 273 | |
|
274 | 274 | with backgroundfilecloser(ui, expectedcount=expectedcount) as bfc: |
|
275 | 275 | try: |
|
276 | 276 | vfs._backgroundfilecloser = bfc |
|
277 | 277 | yield bfc |
|
278 | 278 | finally: |
|
279 | 279 | vfs._backgroundfilecloser = None |
|
280 | 280 | |
|
281 | 281 | class vfs(abstractvfs): |
|
282 | 282 | '''Operate files relative to a base directory |
|
283 | 283 | |
|
284 | 284 | This class is used to hide the details of COW semantics and |
|
285 | 285 | remote file access from higher level code. |
|
286 | 286 | ''' |
|
287 | 287 | def __init__(self, base, audit=True, expandpath=False, realpath=False): |
|
288 | 288 | if expandpath: |
|
289 | 289 | base = util.expandpath(base) |
|
290 | 290 | if realpath: |
|
291 | 291 | base = os.path.realpath(base) |
|
292 | 292 | self.base = base |
|
293 | 293 | self.mustaudit = audit |
|
294 | 294 | self.createmode = None |
|
295 | 295 | self._trustnlink = None |
|
296 | 296 | |
|
297 | 297 | @property |
|
298 | 298 | def mustaudit(self): |
|
299 | 299 | return self._audit |
|
300 | 300 | |
|
301 | 301 | @mustaudit.setter |
|
302 | 302 | def mustaudit(self, onoff): |
|
303 | 303 | self._audit = onoff |
|
304 | 304 | if onoff: |
|
305 | 305 | self.audit = pathutil.pathauditor(self.base) |
|
306 | 306 | else: |
|
307 | 307 | self.audit = util.always |
|
308 | 308 | |
|
309 | 309 | @util.propertycache |
|
310 | 310 | def _cansymlink(self): |
|
311 | 311 | return util.checklink(self.base) |
|
312 | 312 | |
|
313 | 313 | @util.propertycache |
|
314 | 314 | def _chmod(self): |
|
315 | 315 | return util.checkexec(self.base) |
|
316 | 316 | |
|
317 | 317 | def _fixfilemode(self, name): |
|
318 | 318 | if self.createmode is None or not self._chmod: |
|
319 | 319 | return |
|
320 | 320 | os.chmod(name, self.createmode & 0o666) |
|
321 | 321 | |
|
322 | 322 | def __call__(self, path, mode="r", text=False, atomictemp=False, |
|
323 |
notindexed=False, backgroundclose=False, checkambig=False |
|
|
323 | notindexed=False, backgroundclose=False, checkambig=False, | |
|
324 | auditpath=True): | |
|
324 | 325 | '''Open ``path`` file, which is relative to vfs root. |
|
325 | 326 | |
|
326 | 327 | Newly created directories are marked as "not to be indexed by |
|
327 | 328 | the content indexing service", if ``notindexed`` is specified |
|
328 | 329 | for "write" mode access. |
|
329 | 330 | |
|
330 | 331 | If ``backgroundclose`` is passed, the file may be closed asynchronously. |
|
331 | 332 | It can only be used if the ``self.backgroundclosing()`` context manager |
|
332 | 333 | is active. This should only be specified if the following criteria hold: |
|
333 | 334 | |
|
334 | 335 | 1. There is a potential for writing thousands of files. Unless you |
|
335 | 336 | are writing thousands of files, the performance benefits of |
|
336 | 337 | asynchronously closing files is not realized. |
|
337 | 338 | 2. Files are opened exactly once for the ``backgroundclosing`` |
|
338 | 339 | active duration and are therefore free of race conditions between |
|
339 | 340 | closing a file on a background thread and reopening it. (If the |
|
340 | 341 | file were opened multiple times, there could be unflushed data |
|
341 | 342 | because the original file handle hasn't been flushed/closed yet.) |
|
342 | 343 | |
|
343 | 344 | ``checkambig`` argument is passed to atomictemplfile (valid |
|
344 | 345 | only for writing), and is useful only if target file is |
|
345 | 346 | guarded by any lock (e.g. repo.lock or repo.wlock). |
|
346 | 347 | ''' |
|
347 |
if |
|
|
348 | r = util.checkosfilename(path) | |
|
349 | if r: | |
|
350 | raise error.Abort("%s: %r" % (r, path)) | |
|
351 | self.audit(path) | |
|
348 | if auditpath: | |
|
349 | if self._audit: | |
|
350 | r = util.checkosfilename(path) | |
|
351 | if r: | |
|
352 | raise error.Abort("%s: %r" % (r, path)) | |
|
353 | self.audit(path) | |
|
352 | 354 | f = self.join(path) |
|
353 | 355 | |
|
354 | 356 | if not text and "b" not in mode: |
|
355 | 357 | mode += "b" # for that other OS |
|
356 | 358 | |
|
357 | 359 | nlink = -1 |
|
358 | 360 | if mode not in ('r', 'rb'): |
|
359 | 361 | dirname, basename = util.split(f) |
|
360 | 362 | # If basename is empty, then the path is malformed because it points |
|
361 | 363 | # to a directory. Let the posixfile() call below raise IOError. |
|
362 | 364 | if basename: |
|
363 | 365 | if atomictemp: |
|
364 | 366 | util.makedirs(dirname, self.createmode, notindexed) |
|
365 | 367 | return util.atomictempfile(f, mode, self.createmode, |
|
366 | 368 | checkambig=checkambig) |
|
367 | 369 | try: |
|
368 | 370 | if 'w' in mode: |
|
369 | 371 | util.unlink(f) |
|
370 | 372 | nlink = 0 |
|
371 | 373 | else: |
|
372 | 374 | # nlinks() may behave differently for files on Windows |
|
373 | 375 | # shares if the file is open. |
|
374 | 376 | with util.posixfile(f): |
|
375 | 377 | nlink = util.nlinks(f) |
|
376 | 378 | if nlink < 1: |
|
377 | 379 | nlink = 2 # force mktempcopy (issue1922) |
|
378 | 380 | except (OSError, IOError) as e: |
|
379 | 381 | if e.errno != errno.ENOENT: |
|
380 | 382 | raise |
|
381 | 383 | nlink = 0 |
|
382 | 384 | util.makedirs(dirname, self.createmode, notindexed) |
|
383 | 385 | if nlink > 0: |
|
384 | 386 | if self._trustnlink is None: |
|
385 | 387 | self._trustnlink = nlink > 1 or util.checknlink(f) |
|
386 | 388 | if nlink > 1 or not self._trustnlink: |
|
387 | 389 | util.rename(util.mktempcopy(f), f) |
|
388 | 390 | fp = util.posixfile(f, mode) |
|
389 | 391 | if nlink == 0: |
|
390 | 392 | self._fixfilemode(f) |
|
391 | 393 | |
|
392 | 394 | if checkambig: |
|
393 | 395 | if mode in ('r', 'rb'): |
|
394 | 396 | raise error.Abort(_('implementation error: mode %s is not' |
|
395 | 397 | ' valid for checkambig=True') % mode) |
|
396 | 398 | fp = checkambigatclosing(fp) |
|
397 | 399 | |
|
398 | 400 | if backgroundclose: |
|
399 | 401 | if not self._backgroundfilecloser: |
|
400 | 402 | raise error.Abort(_('backgroundclose can only be used when a ' |
|
401 | 403 | 'backgroundclosing context manager is active') |
|
402 | 404 | ) |
|
403 | 405 | |
|
404 | 406 | fp = delayclosedfile(fp, self._backgroundfilecloser) |
|
405 | 407 | |
|
406 | 408 | return fp |
|
407 | 409 | |
|
408 | 410 | def symlink(self, src, dst): |
|
409 | 411 | self.audit(dst) |
|
410 | 412 | linkname = self.join(dst) |
|
411 | 413 | util.tryunlink(linkname) |
|
412 | 414 | |
|
413 | 415 | util.makedirs(os.path.dirname(linkname), self.createmode) |
|
414 | 416 | |
|
415 | 417 | if self._cansymlink: |
|
416 | 418 | try: |
|
417 | 419 | os.symlink(src, linkname) |
|
418 | 420 | except OSError as err: |
|
419 | 421 | raise OSError(err.errno, _('could not symlink to %r: %s') % |
|
420 | 422 | (src, err.strerror), linkname) |
|
421 | 423 | else: |
|
422 | 424 | self.write(dst, src) |
|
423 | 425 | |
|
424 | 426 | def join(self, path, *insidef): |
|
425 | 427 | if path: |
|
426 | 428 | return os.path.join(self.base, path, *insidef) |
|
427 | 429 | else: |
|
428 | 430 | return self.base |
|
429 | 431 | |
|
430 | 432 | opener = vfs |
|
431 | 433 | |
|
432 | 434 | class auditvfs(object): |
|
433 | 435 | def __init__(self, vfs): |
|
434 | 436 | self.vfs = vfs |
|
435 | 437 | |
|
436 | 438 | @property |
|
437 | 439 | def mustaudit(self): |
|
438 | 440 | return self.vfs.mustaudit |
|
439 | 441 | |
|
440 | 442 | @mustaudit.setter |
|
441 | 443 | def mustaudit(self, onoff): |
|
442 | 444 | self.vfs.mustaudit = onoff |
|
443 | 445 | |
|
444 | 446 | @property |
|
445 | 447 | def options(self): |
|
446 | 448 | return self.vfs.options |
|
447 | 449 | |
|
448 | 450 | @options.setter |
|
449 | 451 | def options(self, value): |
|
450 | 452 | self.vfs.options = value |
|
451 | 453 | |
|
452 | 454 | class filtervfs(abstractvfs, auditvfs): |
|
453 | 455 | '''Wrapper vfs for filtering filenames with a function.''' |
|
454 | 456 | |
|
455 | 457 | def __init__(self, vfs, filter): |
|
456 | 458 | auditvfs.__init__(self, vfs) |
|
457 | 459 | self._filter = filter |
|
458 | 460 | |
|
459 | 461 | def __call__(self, path, *args, **kwargs): |
|
460 | 462 | return self.vfs(self._filter(path), *args, **kwargs) |
|
461 | 463 | |
|
462 | 464 | def join(self, path, *insidef): |
|
463 | 465 | if path: |
|
464 | 466 | return self.vfs.join(self._filter(self.vfs.reljoin(path, *insidef))) |
|
465 | 467 | else: |
|
466 | 468 | return self.vfs.join(path) |
|
467 | 469 | |
|
468 | 470 | filteropener = filtervfs |
|
469 | 471 | |
|
470 | 472 | class readonlyvfs(abstractvfs, auditvfs): |
|
471 | 473 | '''Wrapper vfs preventing any writing.''' |
|
472 | 474 | |
|
473 | 475 | def __init__(self, vfs): |
|
474 | 476 | auditvfs.__init__(self, vfs) |
|
475 | 477 | |
|
476 | 478 | def __call__(self, path, mode='r', *args, **kw): |
|
477 | 479 | if mode not in ('r', 'rb'): |
|
478 | 480 | raise error.Abort(_('this vfs is read only')) |
|
479 | 481 | return self.vfs(path, mode, *args, **kw) |
|
480 | 482 | |
|
481 | 483 | def join(self, path, *insidef): |
|
482 | 484 | return self.vfs.join(path, *insidef) |
|
483 | 485 | |
|
484 | 486 | class closewrapbase(object): |
|
485 | 487 | """Base class of wrapper, which hooks closing |
|
486 | 488 | |
|
487 | 489 | Do not instantiate outside of the vfs layer. |
|
488 | 490 | """ |
|
489 | 491 | def __init__(self, fh): |
|
490 | 492 | object.__setattr__(self, r'_origfh', fh) |
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491 | 493 | |
|
492 | 494 | def __getattr__(self, attr): |
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493 | 495 | return getattr(self._origfh, attr) |
|
494 | 496 | |
|
495 | 497 | def __setattr__(self, attr, value): |
|
496 | 498 | return setattr(self._origfh, attr, value) |
|
497 | 499 | |
|
498 | 500 | def __delattr__(self, attr): |
|
499 | 501 | return delattr(self._origfh, attr) |
|
500 | 502 | |
|
501 | 503 | def __enter__(self): |
|
502 | 504 | return self._origfh.__enter__() |
|
503 | 505 | |
|
504 | 506 | def __exit__(self, exc_type, exc_value, exc_tb): |
|
505 | 507 | raise NotImplementedError('attempted instantiating ' + str(type(self))) |
|
506 | 508 | |
|
507 | 509 | def close(self): |
|
508 | 510 | raise NotImplementedError('attempted instantiating ' + str(type(self))) |
|
509 | 511 | |
|
510 | 512 | class delayclosedfile(closewrapbase): |
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511 | 513 | """Proxy for a file object whose close is delayed. |
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512 | 514 | |
|
513 | 515 | Do not instantiate outside of the vfs layer. |
|
514 | 516 | """ |
|
515 | 517 | def __init__(self, fh, closer): |
|
516 | 518 | super(delayclosedfile, self).__init__(fh) |
|
517 | 519 | object.__setattr__(self, r'_closer', closer) |
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518 | 520 | |
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519 | 521 | def __exit__(self, exc_type, exc_value, exc_tb): |
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520 | 522 | self._closer.close(self._origfh) |
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521 | 523 | |
|
522 | 524 | def close(self): |
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523 | 525 | self._closer.close(self._origfh) |
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524 | 526 | |
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525 | 527 | class backgroundfilecloser(object): |
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526 | 528 | """Coordinates background closing of file handles on multiple threads.""" |
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527 | 529 | def __init__(self, ui, expectedcount=-1): |
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528 | 530 | self._running = False |
|
529 | 531 | self._entered = False |
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530 | 532 | self._threads = [] |
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531 | 533 | self._threadexception = None |
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532 | 534 | |
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533 | 535 | # Only Windows/NTFS has slow file closing. So only enable by default |
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534 | 536 | # on that platform. But allow to be enabled elsewhere for testing. |
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535 | 537 | defaultenabled = pycompat.osname == 'nt' |
|
536 | 538 | enabled = ui.configbool('worker', 'backgroundclose', defaultenabled) |
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537 | 539 | |
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538 | 540 | if not enabled: |
|
539 | 541 | return |
|
540 | 542 | |
|
541 | 543 | # There is overhead to starting and stopping the background threads. |
|
542 | 544 | # Don't do background processing unless the file count is large enough |
|
543 | 545 | # to justify it. |
|
544 | 546 | minfilecount = ui.configint('worker', 'backgroundcloseminfilecount') |
|
545 | 547 | # FUTURE dynamically start background threads after minfilecount closes. |
|
546 | 548 | # (We don't currently have any callers that don't know their file count) |
|
547 | 549 | if expectedcount > 0 and expectedcount < minfilecount: |
|
548 | 550 | return |
|
549 | 551 | |
|
550 | 552 | maxqueue = ui.configint('worker', 'backgroundclosemaxqueue') |
|
551 | 553 | threadcount = ui.configint('worker', 'backgroundclosethreadcount') |
|
552 | 554 | |
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553 | 555 | ui.debug('starting %d threads for background file closing\n' % |
|
554 | 556 | threadcount) |
|
555 | 557 | |
|
556 | 558 | self._queue = util.queue(maxsize=maxqueue) |
|
557 | 559 | self._running = True |
|
558 | 560 | |
|
559 | 561 | for i in range(threadcount): |
|
560 | 562 | t = threading.Thread(target=self._worker, name='backgroundcloser') |
|
561 | 563 | self._threads.append(t) |
|
562 | 564 | t.start() |
|
563 | 565 | |
|
564 | 566 | def __enter__(self): |
|
565 | 567 | self._entered = True |
|
566 | 568 | return self |
|
567 | 569 | |
|
568 | 570 | def __exit__(self, exc_type, exc_value, exc_tb): |
|
569 | 571 | self._running = False |
|
570 | 572 | |
|
571 | 573 | # Wait for threads to finish closing so open files don't linger for |
|
572 | 574 | # longer than lifetime of context manager. |
|
573 | 575 | for t in self._threads: |
|
574 | 576 | t.join() |
|
575 | 577 | |
|
576 | 578 | def _worker(self): |
|
577 | 579 | """Main routine for worker thread.""" |
|
578 | 580 | while True: |
|
579 | 581 | try: |
|
580 | 582 | fh = self._queue.get(block=True, timeout=0.100) |
|
581 | 583 | # Need to catch or the thread will terminate and |
|
582 | 584 | # we could orphan file descriptors. |
|
583 | 585 | try: |
|
584 | 586 | fh.close() |
|
585 | 587 | except Exception as e: |
|
586 | 588 | # Stash so can re-raise from main thread later. |
|
587 | 589 | self._threadexception = e |
|
588 | 590 | except util.empty: |
|
589 | 591 | if not self._running: |
|
590 | 592 | break |
|
591 | 593 | |
|
592 | 594 | def close(self, fh): |
|
593 | 595 | """Schedule a file for closing.""" |
|
594 | 596 | if not self._entered: |
|
595 | 597 | raise error.Abort(_('can only call close() when context manager ' |
|
596 | 598 | 'active')) |
|
597 | 599 | |
|
598 | 600 | # If a background thread encountered an exception, raise now so we fail |
|
599 | 601 | # fast. Otherwise we may potentially go on for minutes until the error |
|
600 | 602 | # is acted on. |
|
601 | 603 | if self._threadexception: |
|
602 | 604 | e = self._threadexception |
|
603 | 605 | self._threadexception = None |
|
604 | 606 | raise e |
|
605 | 607 | |
|
606 | 608 | # If we're not actively running, close synchronously. |
|
607 | 609 | if not self._running: |
|
608 | 610 | fh.close() |
|
609 | 611 | return |
|
610 | 612 | |
|
611 | 613 | self._queue.put(fh, block=True, timeout=None) |
|
612 | 614 | |
|
613 | 615 | class checkambigatclosing(closewrapbase): |
|
614 | 616 | """Proxy for a file object, to avoid ambiguity of file stat |
|
615 | 617 | |
|
616 | 618 | See also util.filestat for detail about "ambiguity of file stat". |
|
617 | 619 | |
|
618 | 620 | This proxy is useful only if the target file is guarded by any |
|
619 | 621 | lock (e.g. repo.lock or repo.wlock) |
|
620 | 622 | |
|
621 | 623 | Do not instantiate outside of the vfs layer. |
|
622 | 624 | """ |
|
623 | 625 | def __init__(self, fh): |
|
624 | 626 | super(checkambigatclosing, self).__init__(fh) |
|
625 | 627 | object.__setattr__(self, r'_oldstat', util.filestat.frompath(fh.name)) |
|
626 | 628 | |
|
627 | 629 | def _checkambig(self): |
|
628 | 630 | oldstat = self._oldstat |
|
629 | 631 | if oldstat.stat: |
|
630 | 632 | newstat = util.filestat.frompath(self._origfh.name) |
|
631 | 633 | if newstat.isambig(oldstat): |
|
632 | 634 | # stat of changed file is ambiguous to original one |
|
633 | 635 | newstat.avoidambig(self._origfh.name, oldstat) |
|
634 | 636 | |
|
635 | 637 | def __exit__(self, exc_type, exc_value, exc_tb): |
|
636 | 638 | self._origfh.__exit__(exc_type, exc_value, exc_tb) |
|
637 | 639 | self._checkambig() |
|
638 | 640 | |
|
639 | 641 | def close(self): |
|
640 | 642 | self._origfh.close() |
|
641 | 643 | self._checkambig() |
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