Mercurial > hg
annotate mercurial/pure/parsers.py @ 30320:bff5ccbe5ead stable
vfs: ignore EPERM at os.utime, which avoids ambiguity at renaming (issue5418)
According to POSIX specification, just having group write access to a
file causes EPERM at invocation of os.utime() with an explicit time
information (e.g. working on the repository shared by group access
permission).
To ignore EPERM at renaming in such case, this patch makes
vfs.rename() use filestat.avoidambig() introduced by previous patch.
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
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date | Sun, 13 Nov 2016 06:11:56 +0900 |
parents | 255274719dc1 |
children | 37596c980662 |
rev | line source |
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1 # parsers.py - Python implementation of parsers.c |
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2 # |
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3 # Copyright 2009 Matt Mackall <mpm@selenic.com> and others |
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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 __future__ import absolute_import |
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9 |
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10 import struct |
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11 import zlib |
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12 |
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13 from .node import nullid |
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14 from . import pycompat |
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15 stringio = pycompat.stringio |
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16 |
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17 _pack = struct.pack |
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18 _unpack = struct.unpack |
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19 _compress = zlib.compress |
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20 _decompress = zlib.decompress |
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21 |
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22 # Some code below makes tuples directly because it's more convenient. However, |
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23 # code outside this module should always use dirstatetuple. |
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24 def dirstatetuple(*x): |
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25 # x is a tuple |
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26 return x |
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27 |
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28 indexformatng = ">Qiiiiii20s12x" |
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29 indexfirst = struct.calcsize('Q') |
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30 sizeint = struct.calcsize('i') |
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31 indexsize = struct.calcsize(indexformatng) |
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32 |
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33 def gettype(q): |
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34 return int(q & 0xFFFF) |
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35 |
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36 def offset_type(offset, type): |
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37 return long(long(offset) << 16 | type) |
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38 |
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39 class BaseIndexObject(object): |
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40 def __len__(self): |
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41 return self._lgt + len(self._extra) + 1 |
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42 |
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43 def insert(self, i, tup): |
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44 assert i == -1 |
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45 self._extra.append(tup) |
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46 |
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47 def _fix_index(self, i): |
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48 if not isinstance(i, int): |
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49 raise TypeError("expecting int indexes") |
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50 if i < 0: |
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51 i = len(self) + i |
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52 if i < 0 or i >= len(self): |
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53 raise IndexError |
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54 return i |
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55 |
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56 def __getitem__(self, i): |
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57 i = self._fix_index(i) |
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58 if i == len(self) - 1: |
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59 return (0, 0, 0, -1, -1, -1, -1, nullid) |
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60 if i >= self._lgt: |
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61 return self._extra[i - self._lgt] |
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62 index = self._calculate_index(i) |
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63 r = struct.unpack(indexformatng, self._data[index:index + indexsize]) |
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64 if i == 0: |
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65 e = list(r) |
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66 type = gettype(e[0]) |
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67 e[0] = offset_type(0, type) |
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68 return tuple(e) |
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69 return r |
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70 |
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71 class IndexObject(BaseIndexObject): |
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72 def __init__(self, data): |
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73 assert len(data) % indexsize == 0 |
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74 self._data = data |
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75 self._lgt = len(data) // indexsize |
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76 self._extra = [] |
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77 |
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78 def _calculate_index(self, i): |
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79 return i * indexsize |
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81 def __delitem__(self, i): |
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82 if not isinstance(i, slice) or not i.stop == -1 or not i.step is None: |
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83 raise ValueError("deleting slices only supports a:-1 with step 1") |
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84 i = self._fix_index(i.start) |
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85 if i < self._lgt: |
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86 self._data = self._data[:i * indexsize] |
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87 self._lgt = i |
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88 self._extra = [] |
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89 else: |
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90 self._extra = self._extra[:i - self._lgt] |
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91 |
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92 class InlinedIndexObject(BaseIndexObject): |
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93 def __init__(self, data, inline=0): |
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94 self._data = data |
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95 self._lgt = self._inline_scan(None) |
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96 self._inline_scan(self._lgt) |
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97 self._extra = [] |
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98 |
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99 def _inline_scan(self, lgt): |
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100 off = 0 |
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101 if lgt is not None: |
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102 self._offsets = [0] * lgt |
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103 count = 0 |
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104 while off <= len(self._data) - indexsize: |
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105 s, = struct.unpack('>i', |
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106 self._data[off + indexfirst:off + sizeint + indexfirst]) |
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107 if lgt is not None: |
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108 self._offsets[count] = off |
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109 count += 1 |
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110 off += indexsize + s |
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111 if off != len(self._data): |
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112 raise ValueError("corrupted data") |
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113 return count |
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114 |
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115 def __delitem__(self, i): |
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116 if not isinstance(i, slice) or not i.stop == -1 or not i.step is None: |
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117 raise ValueError("deleting slices only supports a:-1 with step 1") |
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118 i = self._fix_index(i.start) |
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119 if i < self._lgt: |
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120 self._offsets = self._offsets[:i] |
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121 self._lgt = i |
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122 self._extra = [] |
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123 else: |
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124 self._extra = self._extra[:i - self._lgt] |
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125 |
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126 def _calculate_index(self, i): |
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127 return self._offsets[i] |
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128 |
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129 def parse_index2(data, inline): |
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130 if not inline: |
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131 return IndexObject(data), None |
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132 return InlinedIndexObject(data, inline), (0, data) |
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133 |
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134 def parse_dirstate(dmap, copymap, st): |
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135 parents = [st[:20], st[20: 40]] |
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136 # dereference fields so they will be local in loop |
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137 format = ">cllll" |
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138 e_size = struct.calcsize(format) |
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139 pos1 = 40 |
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140 l = len(st) |
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141 |
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142 # the inner loop |
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143 while pos1 < l: |
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144 pos2 = pos1 + e_size |
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145 e = _unpack(">cllll", st[pos1:pos2]) # a literal here is faster |
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146 pos1 = pos2 + e[4] |
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147 f = st[pos2:pos1] |
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148 if '\0' in f: |
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149 f, c = f.split('\0') |
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150 copymap[f] = c |
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151 dmap[f] = e[:4] |
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152 return parents |
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153 |
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154 def pack_dirstate(dmap, copymap, pl, now): |
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155 now = int(now) |
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156 cs = stringio() |
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157 write = cs.write |
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158 write("".join(pl)) |
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159 for f, e in dmap.iteritems(): |
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160 if e[0] == 'n' and e[3] == now: |
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161 # The file was last modified "simultaneously" with the current |
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162 # write to dirstate (i.e. within the same second for file- |
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163 # systems with a granularity of 1 sec). This commonly happens |
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164 # for at least a couple of files on 'update'. |
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165 # The user could change the file without changing its size |
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166 # within the same second. Invalidate the file's mtime in |
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167 # dirstate, forcing future 'status' calls to compare the |
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168 # contents of the file if the size is the same. This prevents |
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169 # mistakenly treating such files as clean. |
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170 e = dirstatetuple(e[0], e[1], e[2], -1) |
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171 dmap[f] = e |
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172 |
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173 if f in copymap: |
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174 f = "%s\0%s" % (f, copymap[f]) |
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175 e = _pack(">cllll", e[0], e[1], e[2], e[3], len(f)) |
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176 write(e) |
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177 write(f) |
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178 return cs.getvalue() |