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@@ -1,450 +1,451 | |||
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1 | 1 | # store.py - repository store handling for Mercurial |
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2 | 2 | # |
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3 | 3 | # Copyright 2008 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 | |
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8 | 8 | from i18n import _ |
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9 | 9 | import osutil, scmutil, util |
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10 | 10 | import os, stat, errno |
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11 | 11 | |
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12 | 12 | _sha = util.sha1 |
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13 | 13 | |
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14 | 14 | # This avoids a collision between a file named foo and a dir named |
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15 | 15 | # foo.i or foo.d |
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16 | 16 | def encodedir(path): |
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17 | 17 | ''' |
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18 | 18 | >>> encodedir('data/foo.i') |
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19 | 19 | 'data/foo.i' |
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20 | 20 | >>> encodedir('data/foo.i/bla.i') |
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21 | 21 | 'data/foo.i.hg/bla.i' |
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22 | 22 | >>> encodedir('data/foo.i.hg/bla.i') |
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23 | 23 | 'data/foo.i.hg.hg/bla.i' |
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24 | 24 | ''' |
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25 | 25 | if not path.startswith('data/'): |
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26 | 26 | return path |
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27 | 27 | return (path |
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28 | 28 | .replace(".hg/", ".hg.hg/") |
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29 | 29 | .replace(".i/", ".i.hg/") |
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30 | 30 | .replace(".d/", ".d.hg/")) |
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31 | 31 | |
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32 | 32 | def decodedir(path): |
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33 | 33 | ''' |
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34 | 34 | >>> decodedir('data/foo.i') |
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35 | 35 | 'data/foo.i' |
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36 | 36 | >>> decodedir('data/foo.i.hg/bla.i') |
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37 | 37 | 'data/foo.i/bla.i' |
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38 | 38 | >>> decodedir('data/foo.i.hg.hg/bla.i') |
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39 | 39 | 'data/foo.i.hg/bla.i' |
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40 | 40 | ''' |
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41 | 41 | if not path.startswith('data/') or ".hg/" not in path: |
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42 | 42 | return path |
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43 | 43 | return (path |
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44 | 44 | .replace(".d.hg/", ".d/") |
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45 | 45 | .replace(".i.hg/", ".i/") |
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46 | 46 | .replace(".hg.hg/", ".hg/")) |
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47 | 47 | |
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48 | 48 | def _buildencodefun(): |
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49 | 49 | ''' |
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50 | 50 | >>> enc, dec = _buildencodefun() |
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51 | 51 | |
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52 | 52 | >>> enc('nothing/special.txt') |
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53 | 53 | 'nothing/special.txt' |
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54 | 54 | >>> dec('nothing/special.txt') |
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55 | 55 | 'nothing/special.txt' |
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56 | 56 | |
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57 | 57 | >>> enc('HELLO') |
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58 | 58 | '_h_e_l_l_o' |
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59 | 59 | >>> dec('_h_e_l_l_o') |
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60 | 60 | 'HELLO' |
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61 | 61 | |
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62 | 62 | >>> enc('hello:world?') |
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63 | 63 | 'hello~3aworld~3f' |
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64 | 64 | >>> dec('hello~3aworld~3f') |
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65 | 65 | 'hello:world?' |
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66 | 66 | |
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67 | 67 | >>> enc('the\x07quick\xADshot') |
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68 | 68 | 'the~07quick~adshot' |
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69 | 69 | >>> dec('the~07quick~adshot') |
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70 | 70 | 'the\\x07quick\\xadshot' |
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71 | 71 | ''' |
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72 | 72 | e = '_' |
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73 | 73 | winreserved = [ord(x) for x in '\\:*?"<>|'] |
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74 | 74 | cmap = dict([(chr(x), chr(x)) for x in xrange(127)]) |
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75 | 75 | for x in (range(32) + range(126, 256) + winreserved): |
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76 | 76 | cmap[chr(x)] = "~%02x" % x |
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77 | 77 | for x in range(ord("A"), ord("Z")+1) + [ord(e)]: |
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78 | 78 | cmap[chr(x)] = e + chr(x).lower() |
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79 | 79 | dmap = {} |
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80 | 80 | for k, v in cmap.iteritems(): |
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81 | 81 | dmap[v] = k |
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82 | 82 | def decode(s): |
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83 | 83 | i = 0 |
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84 | 84 | while i < len(s): |
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85 | 85 | for l in xrange(1, 4): |
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86 | 86 | try: |
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87 | 87 | yield dmap[s[i:i + l]] |
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88 | 88 | i += l |
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89 | 89 | break |
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90 | 90 | except KeyError: |
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91 | 91 | pass |
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92 | 92 | else: |
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93 | 93 | raise KeyError |
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94 | 94 | return (lambda s: "".join([cmap[c] for c in encodedir(s)]), |
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95 | 95 | lambda s: decodedir("".join(list(decode(s))))) |
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96 | 96 | |
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97 | 97 | encodefilename, decodefilename = _buildencodefun() |
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98 | 98 | |
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99 | 99 | def _buildlowerencodefun(): |
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100 | 100 | ''' |
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101 | 101 | >>> f = _buildlowerencodefun() |
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102 | 102 | >>> f('nothing/special.txt') |
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103 | 103 | 'nothing/special.txt' |
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104 | 104 | >>> f('HELLO') |
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105 | 105 | 'hello' |
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106 | 106 | >>> f('hello:world?') |
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107 | 107 | 'hello~3aworld~3f' |
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108 | 108 | >>> f('the\x07quick\xADshot') |
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109 | 109 | 'the~07quick~adshot' |
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110 | 110 | ''' |
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111 | 111 | winreserved = [ord(x) for x in '\\:*?"<>|'] |
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112 | 112 | cmap = dict([(chr(x), chr(x)) for x in xrange(127)]) |
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113 | 113 | for x in (range(32) + range(126, 256) + winreserved): |
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114 | 114 | cmap[chr(x)] = "~%02x" % x |
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115 | 115 | for x in range(ord("A"), ord("Z")+1): |
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116 | 116 | cmap[chr(x)] = chr(x).lower() |
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117 | 117 | return lambda s: "".join([cmap[c] for c in s]) |
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118 | 118 | |
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119 | 119 | lowerencode = _buildlowerencodefun() |
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120 | 120 | |
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121 | 121 | # Windows reserved names: con, prn, aux, nul, com1..com9, lpt1..lpt9 |
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122 | 122 | _winres3 = ('aux', 'con', 'prn', 'nul') # length 3 |
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123 | 123 | _winres4 = ('com', 'lpt') # length 4 (with trailing 1..9) |
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124 | 124 | def _auxencode(path, dotencode): |
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125 | 125 | ''' |
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126 | 126 | Encodes filenames containing names reserved by Windows or which end in |
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127 | 127 | period or space. Does not touch other single reserved characters c. |
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128 | 128 | Specifically, c in '\\:*?"<>|' or ord(c) <= 31 are *not* encoded here. |
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129 | 129 | Additionally encodes space or period at the beginning, if dotencode is |
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130 | 130 | True. Parameter path is assumed to be all lowercase. |
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131 | 131 | A segment only needs encoding if a reserved name appears as a |
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132 | 132 | basename (e.g. "aux", "aux.foo"). A directory or file named "foo.aux" |
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133 | 133 | doesn't need encoding. |
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134 | 134 | |
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135 | 135 | >>> _auxencode('.foo/aux.txt/txt.aux/con/prn/nul/foo.', True) |
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136 | 136 | '~2efoo/au~78.txt/txt.aux/co~6e/pr~6e/nu~6c/foo~2e' |
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137 | 137 | >>> _auxencode('.com1com2/lpt9.lpt4.lpt1/conprn/com0/lpt0/foo.', False) |
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138 | 138 | '.com1com2/lp~749.lpt4.lpt1/conprn/com0/lpt0/foo~2e' |
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139 | 139 | >>> _auxencode('foo. ', True) |
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140 | 140 | 'foo.~20' |
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141 | 141 | >>> _auxencode(' .foo', True) |
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142 | 142 | '~20.foo' |
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143 | 143 | ''' |
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144 | 144 | res = path.split('/') |
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145 | 145 | for i, n in enumerate(res): |
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146 | if n: | |
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146 | if not n: | |
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147 | continue | |
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147 | 148 |
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148 | 149 |
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149 | 150 |
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150 | 151 |
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151 | 152 |
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152 | 153 |
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153 | 154 |
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154 | 155 |
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155 | 156 |
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156 | 157 |
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157 | 158 |
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158 | 159 |
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159 | 160 |
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160 | 161 |
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161 | 162 |
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162 | 163 |
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163 | 164 |
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164 | 165 |
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165 | 166 | return '/'.join(res) |
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166 | 167 | |
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167 | 168 | _maxstorepathlen = 120 |
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168 | 169 | _dirprefixlen = 8 |
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169 | 170 | _maxshortdirslen = 8 * (_dirprefixlen + 1) - 4 |
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170 | 171 | def _hybridencode(path, auxencode): |
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171 | 172 | '''encodes path with a length limit |
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172 | 173 | |
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173 | 174 | Encodes all paths that begin with 'data/', according to the following. |
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174 | 175 | |
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175 | 176 | Default encoding (reversible): |
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176 | 177 | |
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177 | 178 | Encodes all uppercase letters 'X' as '_x'. All reserved or illegal |
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178 | 179 | characters are encoded as '~xx', where xx is the two digit hex code |
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179 | 180 | of the character (see encodefilename). |
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180 | 181 | Relevant path components consisting of Windows reserved filenames are |
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181 | 182 | masked by encoding the third character ('aux' -> 'au~78', see auxencode). |
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182 | 183 | |
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183 | 184 | Hashed encoding (not reversible): |
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184 | 185 | |
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185 | 186 | If the default-encoded path is longer than _maxstorepathlen, a |
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186 | 187 | non-reversible hybrid hashing of the path is done instead. |
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187 | 188 | This encoding uses up to _dirprefixlen characters of all directory |
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188 | 189 | levels of the lowerencoded path, but not more levels than can fit into |
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189 | 190 | _maxshortdirslen. |
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190 | 191 | Then follows the filler followed by the sha digest of the full path. |
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191 | 192 | The filler is the beginning of the basename of the lowerencoded path |
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192 | 193 | (the basename is everything after the last path separator). The filler |
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193 | 194 | is as long as possible, filling in characters from the basename until |
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194 | 195 | the encoded path has _maxstorepathlen characters (or all chars of the |
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195 | 196 | basename have been taken). |
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196 | 197 | The extension (e.g. '.i' or '.d') is preserved. |
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197 | 198 | |
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198 | 199 | The string 'data/' at the beginning is replaced with 'dh/', if the hashed |
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199 | 200 | encoding was used. |
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200 | 201 | ''' |
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201 | 202 | if not path.startswith('data/'): |
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202 | 203 | return path |
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203 | 204 | # escape directories ending with .i and .d |
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204 | 205 | path = encodedir(path) |
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205 | 206 | ndpath = path[len('data/'):] |
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206 | 207 | res = 'data/' + auxencode(encodefilename(ndpath)) |
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207 | 208 | if len(res) > _maxstorepathlen: |
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208 | 209 | digest = _sha(path).hexdigest() |
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209 | 210 | aep = auxencode(lowerencode(ndpath)) |
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210 | 211 | _root, ext = os.path.splitext(aep) |
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211 | 212 | parts = aep.split('/') |
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212 | 213 | basename = parts[-1] |
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213 | 214 | sdirs = [] |
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214 | 215 | for p in parts[:-1]: |
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215 | 216 | d = p[:_dirprefixlen] |
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216 | 217 | if d[-1] in '. ': |
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217 | 218 | # Windows can't access dirs ending in period or space |
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218 | 219 | d = d[:-1] + '_' |
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219 | 220 | t = '/'.join(sdirs) + '/' + d |
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220 | 221 | if len(t) > _maxshortdirslen: |
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221 | 222 | break |
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222 | 223 | sdirs.append(d) |
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223 | 224 | dirs = '/'.join(sdirs) |
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224 | 225 | if len(dirs) > 0: |
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225 | 226 | dirs += '/' |
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226 | 227 | res = 'dh/' + dirs + digest + ext |
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227 | 228 | spaceleft = _maxstorepathlen - len(res) |
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228 | 229 | if spaceleft > 0: |
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229 | 230 | filler = basename[:spaceleft] |
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230 | 231 | res = 'dh/' + dirs + filler + digest + ext |
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231 | 232 | return res |
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232 | 233 | |
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233 | 234 | def _calcmode(path): |
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234 | 235 | try: |
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235 | 236 | # files in .hg/ will be created using this mode |
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236 | 237 | mode = os.stat(path).st_mode |
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237 | 238 | # avoid some useless chmods |
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238 | 239 | if (0777 & ~util.umask) == (0777 & mode): |
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239 | 240 | mode = None |
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240 | 241 | except OSError: |
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241 | 242 | mode = None |
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242 | 243 | return mode |
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243 | 244 | |
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244 | 245 | _data = ('data 00manifest.d 00manifest.i 00changelog.d 00changelog.i' |
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245 | 246 | ' phaseroots obsstore') |
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246 | 247 | |
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247 | 248 | class basicstore(object): |
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248 | 249 | '''base class for local repository stores''' |
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249 | 250 | def __init__(self, path, openertype): |
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250 | 251 | self.path = path |
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251 | 252 | self.createmode = _calcmode(path) |
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252 | 253 | op = openertype(self.path) |
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253 | 254 | op.createmode = self.createmode |
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254 | 255 | self.opener = scmutil.filteropener(op, encodedir) |
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255 | 256 | |
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256 | 257 | def join(self, f): |
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257 | 258 | return self.path + '/' + encodedir(f) |
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258 | 259 | |
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259 | 260 | def _walk(self, relpath, recurse): |
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260 | 261 | '''yields (unencoded, encoded, size)''' |
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261 | 262 | path = self.path |
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262 | 263 | if relpath: |
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263 | 264 | path += '/' + relpath |
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264 | 265 | striplen = len(self.path) + 1 |
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265 | 266 | l = [] |
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266 | 267 | if os.path.isdir(path): |
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267 | 268 | visit = [path] |
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268 | 269 | while visit: |
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269 | 270 | p = visit.pop() |
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270 | 271 | for f, kind, st in osutil.listdir(p, stat=True): |
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271 | 272 | fp = p + '/' + f |
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272 | 273 | if kind == stat.S_IFREG and f[-2:] in ('.d', '.i'): |
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273 | 274 | n = util.pconvert(fp[striplen:]) |
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274 | 275 | l.append((decodedir(n), n, st.st_size)) |
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275 | 276 | elif kind == stat.S_IFDIR and recurse: |
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276 | 277 | visit.append(fp) |
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277 | 278 | l.sort() |
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278 | 279 | return l |
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279 | 280 | |
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280 | 281 | def datafiles(self): |
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281 | 282 | return self._walk('data', True) |
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282 | 283 | |
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283 | 284 | def walk(self): |
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284 | 285 | '''yields (unencoded, encoded, size)''' |
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285 | 286 | # yield data files first |
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286 | 287 | for x in self.datafiles(): |
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287 | 288 | yield x |
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288 | 289 | # yield manifest before changelog |
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289 | 290 | for x in reversed(self._walk('', False)): |
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290 | 291 | yield x |
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291 | 292 | |
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292 | 293 | def copylist(self): |
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293 | 294 | return ['requires'] + _data.split() |
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294 | 295 | |
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295 | 296 | def write(self): |
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296 | 297 | pass |
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297 | 298 | |
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298 | 299 | class encodedstore(basicstore): |
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299 | 300 | def __init__(self, path, openertype): |
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300 | 301 | self.path = path + '/store' |
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301 | 302 | self.createmode = _calcmode(self.path) |
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302 | 303 | op = openertype(self.path) |
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303 | 304 | op.createmode = self.createmode |
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304 | 305 | self.opener = scmutil.filteropener(op, encodefilename) |
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305 | 306 | |
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306 | 307 | def datafiles(self): |
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307 | 308 | for a, b, size in self._walk('data', True): |
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308 | 309 | try: |
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309 | 310 | a = decodefilename(a) |
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310 | 311 | except KeyError: |
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311 | 312 | a = None |
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312 | 313 | yield a, b, size |
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313 | 314 | |
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314 | 315 | def join(self, f): |
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315 | 316 | return self.path + '/' + encodefilename(f) |
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316 | 317 | |
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317 | 318 | def copylist(self): |
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318 | 319 | return (['requires', '00changelog.i'] + |
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319 | 320 | ['store/' + f for f in _data.split()]) |
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320 | 321 | |
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321 | 322 | class fncache(object): |
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322 | 323 | # the filename used to be partially encoded |
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323 | 324 | # hence the encodedir/decodedir dance |
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324 | 325 | def __init__(self, opener): |
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325 | 326 | self.opener = opener |
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326 | 327 | self.entries = None |
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327 | 328 | self._dirty = False |
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328 | 329 | |
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329 | 330 | def _load(self): |
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330 | 331 | '''fill the entries from the fncache file''' |
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331 | 332 | self._dirty = False |
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332 | 333 | try: |
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333 | 334 | fp = self.opener('fncache', mode='rb') |
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334 | 335 | except IOError: |
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335 | 336 | # skip nonexistent file |
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336 | 337 | self.entries = set() |
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337 | 338 | return |
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338 | 339 | self.entries = set(map(decodedir, fp.read().splitlines())) |
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339 | 340 | if '' in self.entries: |
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340 | 341 | fp.seek(0) |
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341 | 342 | for n, line in enumerate(fp): |
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342 | 343 | if not line.rstrip('\n'): |
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343 | 344 | t = _('invalid entry in fncache, line %s') % (n + 1) |
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344 | 345 | raise util.Abort(t) |
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345 | 346 | fp.close() |
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346 | 347 | |
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347 | 348 | def _write(self, files, atomictemp): |
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348 | 349 | fp = self.opener('fncache', mode='wb', atomictemp=atomictemp) |
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349 | 350 | if files: |
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350 | 351 | fp.write('\n'.join(map(encodedir, files)) + '\n') |
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351 | 352 | fp.close() |
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352 | 353 | self._dirty = False |
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353 | 354 | |
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354 | 355 | def rewrite(self, files): |
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355 | 356 | self._write(files, False) |
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356 | 357 | self.entries = set(files) |
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357 | 358 | |
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358 | 359 | def write(self): |
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359 | 360 | if self._dirty: |
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360 | 361 | self._write(self.entries, True) |
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361 | 362 | |
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362 | 363 | def add(self, fn): |
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363 | 364 | if self.entries is None: |
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364 | 365 | self._load() |
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365 | 366 | if fn not in self.entries: |
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366 | 367 | self._dirty = True |
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367 | 368 | self.entries.add(fn) |
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368 | 369 | |
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369 | 370 | def __contains__(self, fn): |
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370 | 371 | if self.entries is None: |
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371 | 372 | self._load() |
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372 | 373 | return fn in self.entries |
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373 | 374 | |
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374 | 375 | def __iter__(self): |
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375 | 376 | if self.entries is None: |
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376 | 377 | self._load() |
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377 | 378 | return iter(self.entries) |
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378 | 379 | |
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379 | 380 | class _fncacheopener(scmutil.abstractopener): |
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380 | 381 | def __init__(self, op, fnc, encode): |
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381 | 382 | self.opener = op |
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382 | 383 | self.fncache = fnc |
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383 | 384 | self.encode = encode |
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384 | 385 | |
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385 | 386 | def _getmustaudit(self): |
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386 | 387 | return self.opener.mustaudit |
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387 | 388 | |
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388 | 389 | def _setmustaudit(self, onoff): |
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389 | 390 | self.opener.mustaudit = onoff |
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390 | 391 | |
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391 | 392 | mustaudit = property(_getmustaudit, _setmustaudit) |
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392 | 393 | |
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393 | 394 | def __call__(self, path, mode='r', *args, **kw): |
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394 | 395 | if mode not in ('r', 'rb') and path.startswith('data/'): |
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395 | 396 | self.fncache.add(path) |
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396 | 397 | return self.opener(self.encode(path), mode, *args, **kw) |
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397 | 398 | |
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398 | 399 | class fncachestore(basicstore): |
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399 | 400 | def __init__(self, path, openertype, encode): |
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400 | 401 | self.encode = encode |
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401 | 402 | self.path = path + '/store' |
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402 | 403 | self.pathsep = self.path + '/' |
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403 | 404 | self.createmode = _calcmode(self.path) |
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404 | 405 | op = openertype(self.path) |
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405 | 406 | op.createmode = self.createmode |
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406 | 407 | fnc = fncache(op) |
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407 | 408 | self.fncache = fnc |
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408 | 409 | self.opener = _fncacheopener(op, fnc, encode) |
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409 | 410 | |
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410 | 411 | def join(self, f): |
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411 | 412 | return self.pathsep + self.encode(f) |
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412 | 413 | |
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413 | 414 | def getsize(self, path): |
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414 | 415 | return os.stat(self.pathsep + path).st_size |
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415 | 416 | |
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416 | 417 | def datafiles(self): |
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417 | 418 | rewrite = False |
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418 | 419 | existing = [] |
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419 | 420 | for f in sorted(self.fncache): |
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420 | 421 | ef = self.encode(f) |
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421 | 422 | try: |
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422 | 423 | yield f, ef, self.getsize(ef) |
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423 | 424 | existing.append(f) |
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424 | 425 | except OSError, err: |
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425 | 426 | if err.errno != errno.ENOENT: |
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426 | 427 | raise |
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427 | 428 | # nonexistent entry |
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428 | 429 | rewrite = True |
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429 | 430 | if rewrite: |
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430 | 431 | # rewrite fncache to remove nonexistent entries |
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431 | 432 | # (may be caused by rollback / strip) |
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432 | 433 | self.fncache.rewrite(existing) |
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433 | 434 | |
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434 | 435 | def copylist(self): |
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435 | 436 | d = ('data dh fncache phaseroots obsstore' |
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436 | 437 | ' 00manifest.d 00manifest.i 00changelog.d 00changelog.i') |
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437 | 438 | return (['requires', '00changelog.i'] + |
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438 | 439 | ['store/' + f for f in d.split()]) |
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439 | 440 | |
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440 | 441 | def write(self): |
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441 | 442 | self.fncache.write() |
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442 | 443 | |
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443 | 444 | def store(requirements, path, openertype): |
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444 | 445 | if 'store' in requirements: |
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445 | 446 | if 'fncache' in requirements: |
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446 | 447 | auxencode = lambda f: _auxencode(f, 'dotencode' in requirements) |
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447 | 448 | encode = lambda f: _hybridencode(f, auxencode) |
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448 | 449 | return fncachestore(path, openertype, encode) |
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449 | 450 | return encodedstore(path, openertype) |
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450 | 451 | return basicstore(path, openertype) |
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