Mercurial > hg
annotate hgext/largefiles/basestore.py @ 49680:40e24d82b513
delta-find: make sure we only use newer full snapshot as candidate
The current code does not needs to protect against this, as there are no older
snapshot in the current cache. However as we are getting ready to reuse this
cache from one revision to another, we need the code to protect itself about
what's coming.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Sun, 06 Nov 2022 17:55:55 -0500 |
parents | 642e31cb55f0 |
children | f4733654f144 |
rev | line source |
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15168 | 1 # Copyright 2009-2010 Gregory P. Ward |
2 # Copyright 2009-2010 Intelerad Medical Systems Incorporated | |
3 # Copyright 2010-2011 Fog Creek Software | |
4 # Copyright 2010-2011 Unity Technologies | |
5 # | |
6 # This software may be used and distributed according to the terms of the | |
7 # GNU General Public License version 2 or any later version. | |
8 | |
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9 '''base class for store implementations and store-related utility code''' |
15168 | 10 |
11 from mercurial.i18n import _ | |
12 | |
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13 from mercurial.node import short |
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14 from mercurial import util |
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15 from mercurial.utils import ( |
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16 urlutil, |
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17 ) |
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18 |
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19 from . import lfutil |
15168 | 20 |
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21 |
15168 | 22 class StoreError(Exception): |
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23 """Raised when there is a problem getting files from or putting |
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24 files to a central store.""" |
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25 |
15168 | 26 def __init__(self, filename, hash, url, detail): |
27 self.filename = filename | |
28 self.hash = hash | |
29 self.url = url | |
30 self.detail = detail | |
31 | |
32 def longmessage(self): | |
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33 return _(b"error getting id %s from url %s for file %s: %s\n") % ( |
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34 self.hash, |
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35 urlutil.hidepassword(self.url), |
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36 self.filename, |
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37 self.detail, |
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38 ) |
15168 | 39 |
40 def __str__(self): | |
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41 return b"%s: %s" % (urlutil.hidepassword(self.url), self.detail) |
15168 | 42 |
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43 |
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44 class basestore: |
15168 | 45 def __init__(self, ui, repo, url): |
46 self.ui = ui | |
47 self.repo = repo | |
48 self.url = url | |
49 | |
50 def put(self, source, hash): | |
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51 '''Put source file into the store so it can be retrieved by hash.''' |
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52 raise NotImplementedError(b'abstract method') |
15168 | 53 |
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54 def exists(self, hashes): |
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55 """Check to see if the store contains the given hashes. Given an |
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56 iterable of hashes it returns a mapping from hash to bool.""" |
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57 raise NotImplementedError(b'abstract method') |
15168 | 58 |
59 def get(self, files): | |
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60 """Get the specified largefiles from the store and write to local |
15168 | 61 files under repo.root. files is a list of (filename, hash) |
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62 tuples. Return (success, missing), lists of files successfully |
15168 | 63 downloaded and those not found in the store. success is a list |
64 of (filename, hash) tuples; missing is a list of filenames that | |
65 we could not get. (The detailed error message will already have | |
66 been presented to the user, so missing is just supplied as a | |
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67 summary.)""" |
15168 | 68 success = [] |
69 missing = [] | |
70 ui = self.ui | |
71 | |
72 at = 0 | |
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73 available = self.exists({hash for (_filename, hash) in files}) |
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74 with ui.makeprogress( |
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75 _(b'getting largefiles'), unit=_(b'files'), total=len(files) |
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76 ) as progress: |
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77 for filename, hash in files: |
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78 progress.update(at) |
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79 at += 1 |
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80 ui.note(_(b'getting %s:%s\n') % (filename, hash)) |
15168 | 81 |
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82 if not available.get(hash): |
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83 ui.warn( |
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84 _(b'%s: largefile %s not available from %s\n') |
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85 % (filename, hash, urlutil.hidepassword(self.url)) |
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86 ) |
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87 missing.append(filename) |
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88 continue |
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89 |
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90 if self._gethash(filename, hash): |
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91 success.append((filename, hash)) |
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92 else: |
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93 missing.append(filename) |
15168 | 94 |
95 return (success, missing) | |
96 | |
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97 def _gethash(self, filename, hash): |
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98 """Get file with the provided hash and store it in the local repo's |
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99 store and in the usercache. |
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100 filename is for informational messages only. |
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101 """ |
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102 util.makedirs(lfutil.storepath(self.repo, b'')) |
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103 storefilename = lfutil.storepath(self.repo, hash) |
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104 |
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105 tmpname = storefilename + b'.tmp' |
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106 with util.atomictempfile( |
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107 tmpname, createmode=self.repo.store.createmode |
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108 ) as tmpfile: |
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109 try: |
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110 gothash = self._getfile(tmpfile, filename, hash) |
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111 except StoreError as err: |
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112 self.ui.warn(err.longmessage()) |
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113 gothash = b"" |
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114 |
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115 if gothash != hash: |
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116 if gothash != b"": |
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117 self.ui.warn( |
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118 _(b'%s: data corruption (expected %s, got %s)\n') |
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119 % (filename, hash, gothash) |
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120 ) |
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121 util.unlink(tmpname) |
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122 return False |
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123 |
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124 util.rename(tmpname, storefilename) |
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125 lfutil.linktousercache(self.repo, hash) |
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126 return True |
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127 |
15168 | 128 def verify(self, revs, contents=False): |
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129 """Verify the existence (and, optionally, contents) of every big |
15168 | 130 file revision referenced by every changeset in revs. |
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131 Return 0 if all is well, non-zero on any errors.""" |
15168 | 132 |
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133 self.ui.status( |
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134 _(b'searching %d changesets for largefiles\n') % len(revs) |
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135 ) |
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136 verified = set() # set of (filename, filenode) tuples |
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137 filestocheck = [] # list of (cset, filename, expectedhash) |
15168 | 138 for rev in revs: |
139 cctx = self.repo[rev] | |
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140 cset = b"%d:%s" % (cctx.rev(), short(cctx.node())) |
15168 | 141 |
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142 for standin in cctx: |
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143 filename = lfutil.splitstandin(standin) |
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144 if filename: |
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145 fctx = cctx[standin] |
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146 key = (filename, fctx.filenode()) |
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147 if key not in verified: |
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148 verified.add(key) |
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149 expectedhash = lfutil.readasstandin(fctx) |
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150 filestocheck.append((cset, filename, expectedhash)) |
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151 |
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152 failed = self._verifyfiles(contents, filestocheck) |
15168 | 153 |
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154 numrevs = len(verified) |
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155 numlfiles = len({fname for (fname, fnode) in verified}) |
15168 | 156 if contents: |
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157 self.ui.status( |
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158 _(b'verified contents of %d revisions of %d largefiles\n') |
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159 % (numrevs, numlfiles) |
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160 ) |
15168 | 161 else: |
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162 self.ui.status( |
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163 _(b'verified existence of %d revisions of %d largefiles\n') |
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164 % (numrevs, numlfiles) |
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165 ) |
15168 | 166 return int(failed) |
167 | |
168 def _getfile(self, tmpfile, filename, hash): | |
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169 """Fetch one revision of one file from the store and write it |
15168 | 170 to tmpfile. Compute the hash of the file on-the-fly as it |
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171 downloads and return the hash. Close tmpfile. Raise |
15168 | 172 StoreError if unable to download the file (e.g. it does not |
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173 exist in the store).""" |
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174 raise NotImplementedError(b'abstract method') |
15168 | 175 |
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176 def _verifyfiles(self, contents, filestocheck): |
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177 """Perform the actual verification of files in the store. |
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178 'contents' controls verification of content hash. |
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179 'filestocheck' is list of files to check. |
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180 Returns _true_ if any problems are found! |
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181 """ |
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182 raise NotImplementedError(b'abstract method') |