Mercurial > hg
annotate mercurial/store.py @ 14517:5a931246afc5
test-copy2: add case for moving a missing file
author | Adrian Buehlmann <adrian@cadifra.com> |
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date | Thu, 02 Jun 2011 19:43:17 +0200 |
parents | 00a0ab08f986 |
children | 774da7121fc9 |
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1 # store.py - repository store handling for Mercurial |
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2 # |
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3 # Copyright 2008 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from i18n import _ |
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9 import osutil, scmutil, util |
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10 import os, stat |
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11 |
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12 _sha = util.sha1 |
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13 |
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14 # This avoids a collision between a file named foo and a dir named |
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15 # foo.i or foo.d |
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16 def encodedir(path): |
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17 ''' |
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18 >>> encodedir('data/foo.i') |
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19 'data/foo.i' |
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20 >>> encodedir('data/foo.i/bla.i') |
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21 'data/foo.i.hg/bla.i' |
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22 >>> encodedir('data/foo.i.hg/bla.i') |
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23 'data/foo.i.hg.hg/bla.i' |
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24 ''' |
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25 if not path.startswith('data/'): |
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26 return path |
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27 return (path |
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28 .replace(".hg/", ".hg.hg/") |
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29 .replace(".i/", ".i.hg/") |
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30 .replace(".d/", ".d.hg/")) |
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31 |
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32 def decodedir(path): |
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33 ''' |
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34 >>> decodedir('data/foo.i') |
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35 'data/foo.i' |
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36 >>> decodedir('data/foo.i.hg/bla.i') |
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37 'data/foo.i/bla.i' |
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38 >>> decodedir('data/foo.i.hg.hg/bla.i') |
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39 'data/foo.i.hg/bla.i' |
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40 ''' |
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41 if not path.startswith('data/') or ".hg/" not in path: |
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42 return path |
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43 return (path |
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44 .replace(".d.hg/", ".d/") |
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45 .replace(".i.hg/", ".i/") |
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46 .replace(".hg.hg/", ".hg/")) |
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47 |
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48 def _buildencodefun(): |
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49 ''' |
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50 >>> enc, dec = _buildencodefun() |
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51 |
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52 >>> enc('nothing/special.txt') |
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53 'nothing/special.txt' |
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54 >>> dec('nothing/special.txt') |
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55 'nothing/special.txt' |
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56 |
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57 >>> enc('HELLO') |
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58 '_h_e_l_l_o' |
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59 >>> dec('_h_e_l_l_o') |
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60 'HELLO' |
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61 |
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62 >>> enc('hello:world?') |
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63 'hello~3aworld~3f' |
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64 >>> dec('hello~3aworld~3f') |
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65 'hello:world?' |
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66 |
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67 >>> enc('the\x07quick\xADshot') |
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68 'the~07quick~adshot' |
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69 >>> dec('the~07quick~adshot') |
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70 'the\\x07quick\\xadshot' |
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71 ''' |
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72 e = '_' |
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73 winreserved = [ord(x) for x in '\\:*?"<>|'] |
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74 cmap = dict([(chr(x), chr(x)) for x in xrange(127)]) |
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75 for x in (range(32) + range(126, 256) + winreserved): |
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76 cmap[chr(x)] = "~%02x" % x |
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77 for x in range(ord("A"), ord("Z")+1) + [ord(e)]: |
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78 cmap[chr(x)] = e + chr(x).lower() |
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79 dmap = {} |
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80 for k, v in cmap.iteritems(): |
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81 dmap[v] = k |
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82 def decode(s): |
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83 i = 0 |
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84 while i < len(s): |
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85 for l in xrange(1, 4): |
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86 try: |
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87 yield dmap[s[i:i + l]] |
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88 i += l |
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89 break |
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90 except KeyError: |
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91 pass |
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92 else: |
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93 raise KeyError |
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94 return (lambda s: "".join([cmap[c] for c in encodedir(s)]), |
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95 lambda s: decodedir("".join(list(decode(s))))) |
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96 |
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97 encodefilename, decodefilename = _buildencodefun() |
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98 |
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99 def _buildlowerencodefun(): |
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100 ''' |
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101 >>> f = _buildlowerencodefun() |
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102 >>> f('nothing/special.txt') |
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103 'nothing/special.txt' |
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104 >>> f('HELLO') |
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105 'hello' |
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106 >>> f('hello:world?') |
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107 'hello~3aworld~3f' |
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108 >>> f('the\x07quick\xADshot') |
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109 'the~07quick~adshot' |
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110 ''' |
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111 winreserved = [ord(x) for x in '\\:*?"<>|'] |
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112 cmap = dict([(chr(x), chr(x)) for x in xrange(127)]) |
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113 for x in (range(32) + range(126, 256) + winreserved): |
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114 cmap[chr(x)] = "~%02x" % x |
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115 for x in range(ord("A"), ord("Z")+1): |
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116 cmap[chr(x)] = chr(x).lower() |
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117 return lambda s: "".join([cmap[c] for c in s]) |
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118 |
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119 lowerencode = _buildlowerencodefun() |
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120 |
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121 _winreservednames = '''con prn aux nul |
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122 com1 com2 com3 com4 com5 com6 com7 com8 com9 |
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123 lpt1 lpt2 lpt3 lpt4 lpt5 lpt6 lpt7 lpt8 lpt9'''.split() |
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124 def _auxencode(path, dotencode): |
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125 ''' |
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126 Encodes filenames containing names reserved by Windows or which end in |
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127 period or space. Does not touch other single reserved characters c. |
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128 Specifically, c in '\\:*?"<>|' or ord(c) <= 31 are *not* encoded here. |
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129 Additionally encodes space or period at the beginning, if dotencode is |
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130 True. |
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131 path is assumed to be all lowercase. |
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132 |
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133 >>> _auxencode('.foo/aux.txt/txt.aux/con/prn/nul/foo.', True) |
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134 '~2efoo/au~78.txt/txt.aux/co~6e/pr~6e/nu~6c/foo~2e' |
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135 >>> _auxencode('.com1com2/lpt9.lpt4.lpt1/conprn/foo.', False) |
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136 '.com1com2/lp~749.lpt4.lpt1/conprn/foo~2e' |
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137 >>> _auxencode('foo. ', True) |
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138 'foo.~20' |
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139 >>> _auxencode(' .foo', True) |
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140 '~20.foo' |
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141 ''' |
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142 res = [] |
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143 for n in path.split('/'): |
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144 if n: |
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145 base = n.split('.')[0] |
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146 if base and (base in _winreservednames): |
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147 # encode third letter ('aux' -> 'au~78') |
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148 ec = "~%02x" % ord(n[2]) |
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149 n = n[0:2] + ec + n[3:] |
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150 if n[-1] in '. ': |
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151 # encode last period or space ('foo...' -> 'foo..~2e') |
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152 n = n[:-1] + "~%02x" % ord(n[-1]) |
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153 if dotencode and n[0] in '. ': |
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154 n = "~%02x" % ord(n[0]) + n[1:] |
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155 res.append(n) |
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156 return '/'.join(res) |
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157 |
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158 _maxstorepathlen = 120 |
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159 _dirprefixlen = 8 |
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160 _maxshortdirslen = 8 * (_dirprefixlen + 1) - 4 |
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161 def _hybridencode(path, auxencode): |
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162 '''encodes path with a length limit |
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163 |
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164 Encodes all paths that begin with 'data/', according to the following. |
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165 |
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166 Default encoding (reversible): |
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167 |
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168 Encodes all uppercase letters 'X' as '_x'. All reserved or illegal |
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169 characters are encoded as '~xx', where xx is the two digit hex code |
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170 of the character (see encodefilename). |
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171 Relevant path components consisting of Windows reserved filenames are |
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172 masked by encoding the third character ('aux' -> 'au~78', see auxencode). |
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173 |
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174 Hashed encoding (not reversible): |
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175 |
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176 If the default-encoded path is longer than _maxstorepathlen, a |
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177 non-reversible hybrid hashing of the path is done instead. |
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178 This encoding uses up to _dirprefixlen characters of all directory |
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179 levels of the lowerencoded path, but not more levels than can fit into |
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180 _maxshortdirslen. |
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181 Then follows the filler followed by the sha digest of the full path. |
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182 The filler is the beginning of the basename of the lowerencoded path |
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183 (the basename is everything after the last path separator). The filler |
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184 is as long as possible, filling in characters from the basename until |
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185 the encoded path has _maxstorepathlen characters (or all chars of the |
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186 basename have been taken). |
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187 The extension (e.g. '.i' or '.d') is preserved. |
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188 |
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189 The string 'data/' at the beginning is replaced with 'dh/', if the hashed |
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190 encoding was used. |
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191 ''' |
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192 if not path.startswith('data/'): |
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193 return path |
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194 # escape directories ending with .i and .d |
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195 path = encodedir(path) |
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196 ndpath = path[len('data/'):] |
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197 res = 'data/' + auxencode(encodefilename(ndpath)) |
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198 if len(res) > _maxstorepathlen: |
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199 digest = _sha(path).hexdigest() |
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200 aep = auxencode(lowerencode(ndpath)) |
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201 _root, ext = os.path.splitext(aep) |
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202 parts = aep.split('/') |
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203 basename = parts[-1] |
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204 sdirs = [] |
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205 for p in parts[:-1]: |
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206 d = p[:_dirprefixlen] |
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207 if d[-1] in '. ': |
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208 # Windows can't access dirs ending in period or space |
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209 d = d[:-1] + '_' |
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210 t = '/'.join(sdirs) + '/' + d |
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211 if len(t) > _maxshortdirslen: |
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212 break |
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213 sdirs.append(d) |
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214 dirs = '/'.join(sdirs) |
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215 if len(dirs) > 0: |
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216 dirs += '/' |
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217 res = 'dh/' + dirs + digest + ext |
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218 spaceleft = _maxstorepathlen - len(res) |
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219 if spaceleft > 0: |
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220 filler = basename[:spaceleft] |
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221 res = 'dh/' + dirs + filler + digest + ext |
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222 return res |
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223 |
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224 def _calcmode(path): |
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225 try: |
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226 # files in .hg/ will be created using this mode |
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227 mode = os.stat(path).st_mode |
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228 # avoid some useless chmods |
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229 if (0777 & ~util.umask) == (0777 & mode): |
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230 mode = None |
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231 except OSError: |
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232 mode = None |
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233 return mode |
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234 |
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235 _data = 'data 00manifest.d 00manifest.i 00changelog.d 00changelog.i' |
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236 |
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237 class basicstore(object): |
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238 '''base class for local repository stores''' |
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239 def __init__(self, path, openertype): |
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240 self.path = path |
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241 self.createmode = _calcmode(path) |
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242 op = openertype(self.path) |
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243 op.createmode = self.createmode |
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244 self.opener = scmutil.filteropener(op, encodedir) |
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245 |
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246 def join(self, f): |
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247 return self.path + '/' + encodedir(f) |
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248 |
6899 | 249 def _walk(self, relpath, recurse): |
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250 '''yields (unencoded, encoded, size)''' |
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251 path = self.path |
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252 if relpath: |
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253 path += '/' + relpath |
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254 striplen = len(self.path) + 1 |
6899 | 255 l = [] |
256 if os.path.isdir(path): | |
257 visit = [path] | |
258 while visit: | |
259 p = visit.pop() | |
260 for f, kind, st in osutil.listdir(p, stat=True): | |
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261 fp = p + '/' + f |
6899 | 262 if kind == stat.S_IFREG and f[-2:] in ('.d', '.i'): |
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263 n = util.pconvert(fp[striplen:]) |
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264 l.append((decodedir(n), n, st.st_size)) |
6899 | 265 elif kind == stat.S_IFDIR and recurse: |
266 visit.append(fp) | |
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267 return sorted(l) |
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268 |
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269 def datafiles(self): |
6899 | 270 return self._walk('data', True) |
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271 |
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272 def walk(self): |
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273 '''yields (unencoded, encoded, size)''' |
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274 # yield data files first |
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275 for x in self.datafiles(): |
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276 yield x |
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277 # yield manifest before changelog |
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278 for x in reversed(self._walk('', False)): |
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279 yield x |
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280 |
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281 def copylist(self): |
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282 return ['requires'] + _data.split() |
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283 |
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284 def write(self): |
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285 pass |
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286 |
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287 class encodedstore(basicstore): |
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288 def __init__(self, path, openertype): |
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289 self.path = path + '/store' |
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290 self.createmode = _calcmode(self.path) |
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291 op = openertype(self.path) |
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292 op.createmode = self.createmode |
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293 self.opener = scmutil.filteropener(op, encodefilename) |
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294 |
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295 def datafiles(self): |
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296 for a, b, size in self._walk('data', True): |
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297 try: |
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298 a = decodefilename(a) |
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299 except KeyError: |
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300 a = None |
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301 yield a, b, size |
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302 |
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303 def join(self, f): |
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304 return self.path + '/' + encodefilename(f) |
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305 |
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306 def copylist(self): |
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307 return (['requires', '00changelog.i'] + |
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308 ['store/' + f for f in _data.split()]) |
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309 |
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310 class fncache(object): |
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311 # the filename used to be partially encoded |
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312 # hence the encodedir/decodedir dance |
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313 def __init__(self, opener): |
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314 self.opener = opener |
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315 self.entries = None |
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316 self._dirty = False |
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317 |
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318 def _load(self): |
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319 '''fill the entries from the fncache file''' |
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320 self.entries = set() |
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321 self._dirty = False |
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322 try: |
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323 fp = self.opener('fncache', mode='rb') |
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324 except IOError: |
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325 # skip nonexistent file |
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326 return |
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327 for n, line in enumerate(fp): |
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328 if (len(line) < 2) or (line[-1] != '\n'): |
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329 t = _('invalid entry in fncache, line %s') % (n + 1) |
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330 raise util.Abort(t) |
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331 self.entries.add(decodedir(line[:-1])) |
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332 fp.close() |
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333 |
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334 def rewrite(self, files): |
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335 fp = self.opener('fncache', mode='wb') |
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336 for p in files: |
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337 fp.write(encodedir(p) + '\n') |
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338 fp.close() |
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339 self.entries = set(files) |
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340 self._dirty = False |
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341 |
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342 def write(self): |
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343 if not self._dirty: |
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344 return |
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345 fp = self.opener('fncache', mode='wb', atomictemp=True) |
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346 for p in self.entries: |
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347 fp.write(encodedir(p) + '\n') |
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348 fp.rename() |
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349 self._dirty = False |
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350 |
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351 def add(self, fn): |
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352 if self.entries is None: |
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353 self._load() |
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354 if fn not in self.entries: |
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355 self._dirty = True |
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356 self.entries.add(fn) |
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357 |
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358 def __contains__(self, fn): |
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359 if self.entries is None: |
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360 self._load() |
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361 return fn in self.entries |
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362 |
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363 def __iter__(self): |
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364 if self.entries is None: |
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365 self._load() |
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366 return iter(self.entries) |
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367 |
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368 class _fncacheopener(scmutil.abstractopener): |
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369 def __init__(self, op, fnc, encode): |
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370 self.opener = op |
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371 self.fncache = fnc |
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372 self.encode = encode |
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373 |
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374 def __call__(self, path, mode='r', *args, **kw): |
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375 if mode not in ('r', 'rb') and path.startswith('data/'): |
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376 self.fncache.add(path) |
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377 return self.opener(self.encode(path), mode, *args, **kw) |
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378 |
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379 class fncachestore(basicstore): |
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380 def __init__(self, path, openertype, encode): |
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381 self.encode = encode |
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382 self.path = path + '/store' |
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383 self.createmode = _calcmode(self.path) |
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384 op = openertype(self.path) |
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385 op.createmode = self.createmode |
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386 fnc = fncache(op) |
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387 self.fncache = fnc |
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388 self.opener = _fncacheopener(op, fnc, encode) |
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389 |
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390 def join(self, f): |
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391 return self.path + '/' + self.encode(f) |
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392 |
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393 def datafiles(self): |
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394 rewrite = False |
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395 existing = [] |
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396 spath = self.path |
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397 for f in self.fncache: |
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398 ef = self.encode(f) |
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399 try: |
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400 st = os.stat(spath + '/' + ef) |
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401 yield f, ef, st.st_size |
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402 existing.append(f) |
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403 except OSError: |
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404 # nonexistent entry |
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405 rewrite = True |
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406 if rewrite: |
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407 # rewrite fncache to remove nonexistent entries |
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408 # (may be caused by rollback / strip) |
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409 self.fncache.rewrite(existing) |
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410 |
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411 def copylist(self): |
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412 d = ('data dh fncache' |
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413 ' 00manifest.d 00manifest.i 00changelog.d 00changelog.i') |
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414 return (['requires', '00changelog.i'] + |
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415 ['store/' + f for f in d.split()]) |
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416 |
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417 def write(self): |
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418 self.fncache.write() |
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419 |
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420 def store(requirements, path, openertype): |
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421 if 'store' in requirements: |
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422 if 'fncache' in requirements: |
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423 auxencode = lambda f: _auxencode(f, 'dotencode' in requirements) |
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424 encode = lambda f: _hybridencode(f, auxencode) |
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425 return fncachestore(path, openertype, encode) |
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426 return encodedstore(path, openertype) |
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427 return basicstore(path, openertype) |