Mercurial > hg
annotate hgext/remotefilelog/basestore.py @ 41500:8c13f7b0ace6
tests: alter email `From` line to a value that's consistently parsed
Python2:
>>> email.header.decode_header('=?UTF-8?q?Rapha=C3=ABl=20Hertzog?= <hertzog@debian.org>')
[('Rapha\xc3\xabl Hertzog', 'utf-8'), ('<hertzog@debian.org>', None)]
Python3:
>>> email.header.decode_header('=?UTF-8?q?Rapha=C3=ABl=20Hertzog?= <hertzog@debian.org>')
[(b'Rapha\xc3\xabl Hertzog', 'utf-8'), (b' <hertzog@debian.org>', None)]
So alter the input to an input that parses to the same result
consistently. After skimming the relevant RFC (1342), I'm not sure if
what we had was valid, or how I could modify it to be more consistent.
Differential Revision: https://phab.mercurial-scm.org/D5769
author | Augie Fackler <augie@google.com> |
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date | Wed, 30 Jan 2019 19:43:43 -0500 |
parents | 92cf293fd93d |
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1 from __future__ import absolute_import |
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2 |
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3 import errno |
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4 import hashlib |
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5 import os |
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6 import shutil |
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7 import stat |
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8 import time |
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9 |
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10 from mercurial.i18n import _ |
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11 from mercurial.node import bin, hex |
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12 from mercurial import ( |
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13 error, |
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14 pycompat, |
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15 util, |
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16 ) |
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17 from . import ( |
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18 constants, |
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19 shallowutil, |
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20 ) |
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21 |
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22 class basestore(object): |
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23 def __init__(self, repo, path, reponame, shared=False): |
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24 """Creates a remotefilelog store object for the given repo name. |
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25 |
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26 `path` - The file path where this store keeps its data |
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27 `reponame` - The name of the repo. This is used to partition data from |
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28 many repos. |
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29 `shared` - True if this store is a shared cache of data from the central |
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30 server, for many repos on this machine. False means this store is for |
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31 the local data for one repo. |
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32 """ |
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33 self.repo = repo |
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34 self.ui = repo.ui |
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35 self._path = path |
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36 self._reponame = reponame |
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37 self._shared = shared |
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38 self._uid = os.getuid() if not pycompat.iswindows else None |
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39 |
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40 self._validatecachelog = self.ui.config("remotefilelog", |
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41 "validatecachelog") |
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42 self._validatecache = self.ui.config("remotefilelog", "validatecache", |
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43 'on') |
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44 if self._validatecache not in ('on', 'strict', 'off'): |
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45 self._validatecache = 'on' |
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46 if self._validatecache == 'off': |
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47 self._validatecache = False |
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48 |
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49 if shared: |
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50 shallowutil.mkstickygroupdir(self.ui, path) |
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51 |
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52 def getmissing(self, keys): |
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53 missing = [] |
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54 for name, node in keys: |
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55 filepath = self._getfilepath(name, node) |
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56 exists = os.path.exists(filepath) |
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57 if (exists and self._validatecache == 'strict' and |
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58 not self._validatekey(filepath, 'contains')): |
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59 exists = False |
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60 if not exists: |
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61 missing.append((name, node)) |
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62 |
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63 return missing |
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64 |
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65 # BELOW THIS ARE IMPLEMENTATIONS OF REPACK SOURCE |
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66 |
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67 def markledger(self, ledger, options=None): |
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68 if options and options.get(constants.OPTION_PACKSONLY): |
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69 return |
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70 if self._shared: |
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71 for filename, nodes in self._getfiles(): |
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72 for node in nodes: |
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73 ledger.markdataentry(self, filename, node) |
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74 ledger.markhistoryentry(self, filename, node) |
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75 |
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76 def cleanup(self, ledger): |
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77 ui = self.ui |
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78 entries = ledger.sources.get(self, []) |
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79 count = 0 |
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80 progress = ui.makeprogress(_("cleaning up"), unit="files", |
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81 total=len(entries)) |
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82 for entry in entries: |
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83 if entry.gced or (entry.datarepacked and entry.historyrepacked): |
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84 progress.update(count) |
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85 path = self._getfilepath(entry.filename, entry.node) |
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86 util.tryunlink(path) |
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87 count += 1 |
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88 progress.complete() |
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89 |
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90 # Clean up the repo cache directory. |
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91 self._cleanupdirectory(self._getrepocachepath()) |
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92 |
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93 # BELOW THIS ARE NON-STANDARD APIS |
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94 |
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95 def _cleanupdirectory(self, rootdir): |
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96 """Removes the empty directories and unnecessary files within the root |
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97 directory recursively. Note that this method does not remove the root |
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98 directory itself. """ |
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99 |
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100 oldfiles = set() |
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101 otherfiles = set() |
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102 # osutil.listdir returns stat information which saves some rmdir/listdir |
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103 # syscalls. |
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104 for name, mode in util.osutil.listdir(rootdir): |
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105 if stat.S_ISDIR(mode): |
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106 dirpath = os.path.join(rootdir, name) |
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107 self._cleanupdirectory(dirpath) |
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108 |
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109 # Now that the directory specified by dirpath is potentially |
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110 # empty, try and remove it. |
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111 try: |
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112 os.rmdir(dirpath) |
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113 except OSError: |
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114 pass |
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115 |
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116 elif stat.S_ISREG(mode): |
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117 if name.endswith('_old'): |
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118 oldfiles.add(name[:-4]) |
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119 else: |
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120 otherfiles.add(name) |
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121 |
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122 # Remove the files which end with suffix '_old' and have no |
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123 # corresponding file without the suffix '_old'. See addremotefilelognode |
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124 # method for the generation/purpose of files with '_old' suffix. |
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125 for filename in oldfiles - otherfiles: |
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126 filepath = os.path.join(rootdir, filename + '_old') |
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127 util.tryunlink(filepath) |
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128 |
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129 def _getfiles(self): |
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130 """Return a list of (filename, [node,...]) for all the revisions that |
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131 exist in the store. |
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132 |
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133 This is useful for obtaining a list of all the contents of the store |
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134 when performing a repack to another store, since the store API requires |
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135 name+node keys and not namehash+node keys. |
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136 """ |
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137 existing = {} |
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138 for filenamehash, node in self._listkeys(): |
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139 existing.setdefault(filenamehash, []).append(node) |
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140 |
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141 filenamemap = self._resolvefilenames(existing.keys()) |
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142 |
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143 for filename, sha in filenamemap.iteritems(): |
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144 yield (filename, existing[sha]) |
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145 |
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146 def _resolvefilenames(self, hashes): |
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147 """Given a list of filename hashes that are present in the |
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148 remotefilelog store, return a mapping from filename->hash. |
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149 |
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150 This is useful when converting remotefilelog blobs into other storage |
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151 formats. |
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152 """ |
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153 if not hashes: |
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154 return {} |
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155 |
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156 filenames = {} |
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157 missingfilename = set(hashes) |
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158 |
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159 # Start with a full manifest, since it'll cover the majority of files |
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160 for filename in self.repo['tip'].manifest(): |
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161 sha = hashlib.sha1(filename).digest() |
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162 if sha in missingfilename: |
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163 filenames[filename] = sha |
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164 missingfilename.discard(sha) |
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165 |
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166 # Scan the changelog until we've found every file name |
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167 cl = self.repo.unfiltered().changelog |
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168 for rev in pycompat.xrange(len(cl) - 1, -1, -1): |
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169 if not missingfilename: |
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170 break |
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171 files = cl.readfiles(cl.node(rev)) |
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172 for filename in files: |
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173 sha = hashlib.sha1(filename).digest() |
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174 if sha in missingfilename: |
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175 filenames[filename] = sha |
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176 missingfilename.discard(sha) |
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177 |
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178 return filenames |
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179 |
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180 def _getrepocachepath(self): |
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181 return os.path.join( |
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182 self._path, self._reponame) if self._shared else self._path |
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183 |
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184 def _listkeys(self): |
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185 """List all the remotefilelog keys that exist in the store. |
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186 |
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187 Returns a iterator of (filename hash, filecontent hash) tuples. |
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188 """ |
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189 |
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190 for root, dirs, files in os.walk(self._getrepocachepath()): |
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191 for filename in files: |
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192 if len(filename) != 40: |
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193 continue |
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194 node = filename |
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195 if self._shared: |
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196 # .../1a/85ffda..be21 |
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197 filenamehash = root[-41:-39] + root[-38:] |
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198 else: |
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199 filenamehash = root[-40:] |
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200 yield (bin(filenamehash), bin(node)) |
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201 |
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202 def _getfilepath(self, name, node): |
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203 node = hex(node) |
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204 if self._shared: |
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205 key = shallowutil.getcachekey(self._reponame, name, node) |
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206 else: |
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207 key = shallowutil.getlocalkey(name, node) |
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208 |
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209 return os.path.join(self._path, key) |
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210 |
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211 def _getdata(self, name, node): |
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212 filepath = self._getfilepath(name, node) |
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213 try: |
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214 data = shallowutil.readfile(filepath) |
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215 if self._validatecache and not self._validatedata(data, filepath): |
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216 if self._validatecachelog: |
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217 with open(self._validatecachelog, 'a+') as f: |
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218 f.write("corrupt %s during read\n" % filepath) |
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219 os.rename(filepath, filepath + ".corrupt") |
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220 raise KeyError("corrupt local cache file %s" % filepath) |
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221 except IOError: |
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222 raise KeyError("no file found at %s for %s:%s" % (filepath, name, |
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223 hex(node))) |
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224 |
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225 return data |
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226 |
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227 def addremotefilelognode(self, name, node, data): |
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228 filepath = self._getfilepath(name, node) |
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229 |
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230 oldumask = os.umask(0o002) |
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231 try: |
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232 # if this node already exists, save the old version for |
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233 # recovery/debugging purposes. |
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234 if os.path.exists(filepath): |
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235 newfilename = filepath + '_old' |
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236 # newfilename can be read-only and shutil.copy will fail. |
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237 # Delete newfilename to avoid it |
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238 if os.path.exists(newfilename): |
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239 shallowutil.unlinkfile(newfilename) |
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240 shutil.copy(filepath, newfilename) |
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241 |
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242 shallowutil.mkstickygroupdir(self.ui, os.path.dirname(filepath)) |
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243 shallowutil.writefile(filepath, data, readonly=True) |
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244 |
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245 if self._validatecache: |
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246 if not self._validatekey(filepath, 'write'): |
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247 raise error.Abort(_("local cache write was corrupted %s") % |
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248 filepath) |
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249 finally: |
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250 os.umask(oldumask) |
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251 |
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252 def markrepo(self, path): |
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253 """Call this to add the given repo path to the store's list of |
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254 repositories that are using it. This is useful later when doing garbage |
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255 collection, since it allows us to insecpt the repos to see what nodes |
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256 they want to be kept alive in the store. |
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257 """ |
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258 repospath = os.path.join(self._path, "repos") |
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259 with open(repospath, 'ab') as reposfile: |
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260 reposfile.write(os.path.dirname(path) + "\n") |
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261 |
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262 repospathstat = os.stat(repospath) |
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263 if repospathstat.st_uid == self._uid: |
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264 os.chmod(repospath, 0o0664) |
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265 |
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266 def _validatekey(self, path, action): |
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267 with open(path, 'rb') as f: |
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268 data = f.read() |
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269 |
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270 if self._validatedata(data, path): |
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271 return True |
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272 |
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273 if self._validatecachelog: |
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274 with open(self._validatecachelog, 'ab+') as f: |
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275 f.write("corrupt %s during %s\n" % (path, action)) |
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276 |
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277 os.rename(path, path + ".corrupt") |
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278 return False |
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279 |
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280 def _validatedata(self, data, path): |
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281 try: |
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282 if len(data) > 0: |
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283 # see remotefilelogserver.createfileblob for the format |
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284 offset, size, flags = shallowutil.parsesizeflags(data) |
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285 if len(data) <= size: |
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286 # it is truncated |
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287 return False |
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288 |
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289 # extract the node from the metadata |
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290 offset += size |
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291 datanode = data[offset:offset + 20] |
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292 |
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293 # and compare against the path |
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294 if os.path.basename(path) == hex(datanode): |
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295 # Content matches the intended path |
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296 return True |
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297 return False |
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298 except (ValueError, RuntimeError): |
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299 pass |
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300 |
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301 return False |
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302 |
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303 def gc(self, keepkeys): |
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304 ui = self.ui |
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305 cachepath = self._path |
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306 |
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307 # prune cache |
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308 queue = pycompat.queue.PriorityQueue() |
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309 originalsize = 0 |
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310 size = 0 |
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311 count = 0 |
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312 removed = 0 |
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313 |
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314 # keep files newer than a day even if they aren't needed |
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315 limit = time.time() - (60 * 60 * 24) |
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316 |
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317 progress = ui.makeprogress(_("removing unnecessary files"), |
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318 unit="files") |
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319 progress.update(0) |
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320 for root, dirs, files in os.walk(cachepath): |
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321 for file in files: |
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322 if file == 'repos': |
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323 continue |
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324 |
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325 # Don't delete pack files |
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326 if '/packs/' in root: |
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327 continue |
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328 |
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329 progress.update(count) |
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330 path = os.path.join(root, file) |
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331 key = os.path.relpath(path, cachepath) |
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332 count += 1 |
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333 try: |
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334 pathstat = os.stat(path) |
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335 except OSError as e: |
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336 # errno.ENOENT = no such file or directory |
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337 if e.errno != errno.ENOENT: |
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338 raise |
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339 msg = _("warning: file %s was removed by another process\n") |
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340 ui.warn(msg % path) |
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341 continue |
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342 |
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343 originalsize += pathstat.st_size |
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344 |
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345 if key in keepkeys or pathstat.st_atime > limit: |
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346 queue.put((pathstat.st_atime, path, pathstat)) |
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347 size += pathstat.st_size |
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348 else: |
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349 try: |
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350 shallowutil.unlinkfile(path) |
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351 except OSError as e: |
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352 # errno.ENOENT = no such file or directory |
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353 if e.errno != errno.ENOENT: |
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354 raise |
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355 msg = _("warning: file %s was removed by another " |
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356 "process\n") |
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357 ui.warn(msg % path) |
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358 continue |
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359 removed += 1 |
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360 progress.complete() |
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361 |
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362 # remove oldest files until under limit |
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363 limit = ui.configbytes("remotefilelog", "cachelimit") |
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364 if size > limit: |
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365 excess = size - limit |
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366 progress = ui.makeprogress(_("enforcing cache limit"), unit="bytes", |
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367 total=excess) |
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368 removedexcess = 0 |
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369 while queue and size > limit and size > 0: |
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370 progress.update(removedexcess) |
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371 atime, oldpath, oldpathstat = queue.get() |
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372 try: |
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373 shallowutil.unlinkfile(oldpath) |
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374 except OSError as e: |
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375 # errno.ENOENT = no such file or directory |
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376 if e.errno != errno.ENOENT: |
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377 raise |
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378 msg = _("warning: file %s was removed by another process\n") |
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379 ui.warn(msg % oldpath) |
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380 size -= oldpathstat.st_size |
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381 removed += 1 |
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382 removedexcess += oldpathstat.st_size |
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383 progress.complete() |
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384 |
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385 ui.status(_("finished: removed %d of %d files (%0.2f GB to %0.2f GB)\n") |
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386 % (removed, count, |
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387 float(originalsize) / 1024.0 / 1024.0 / 1024.0, |
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388 float(size) / 1024.0 / 1024.0 / 1024.0)) |
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389 |
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390 class baseunionstore(object): |
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391 def __init__(self, *args, **kwargs): |
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392 # If one of the functions that iterates all of the stores is about to |
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393 # throw a KeyError, try this many times with a full refresh between |
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394 # attempts. A repack operation may have moved data from one store to |
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395 # another while we were running. |
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396 self.numattempts = kwargs.get(r'numretries', 0) + 1 |
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397 # If not-None, call this function on every retry and if the attempts are |
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398 # exhausted. |
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399 self.retrylog = kwargs.get(r'retrylog', None) |
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400 |
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401 def markforrefresh(self): |
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402 for store in self.stores: |
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403 if util.safehasattr(store, 'markforrefresh'): |
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404 store.markforrefresh() |
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405 |
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406 @staticmethod |
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407 def retriable(fn): |
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408 def noop(*args): |
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409 pass |
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410 def wrapped(self, *args, **kwargs): |
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411 retrylog = self.retrylog or noop |
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412 funcname = fn.__name__ |
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413 for i in pycompat.xrange(self.numattempts): |
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414 if i > 0: |
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415 retrylog('re-attempting (n=%d) %s\n' % (i, funcname)) |
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416 self.markforrefresh() |
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417 try: |
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418 return fn(self, *args, **kwargs) |
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419 except KeyError: |
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420 pass |
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421 # retries exhausted |
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422 retrylog('retries exhausted in %s, raising KeyError\n' % |
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423 pycompat.sysbytes(funcname)) |
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424 raise |
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425 return wrapped |