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@@ -1,417 +1,482 b'' | |||
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1 | 1 | # changelog.py - changelog class for mercurial |
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2 | 2 | # |
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3 | 3 | # Copyright 2005-2007 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 __future__ import absolute_import |
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9 | 9 | |
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10 | import collections | |
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11 | ||
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10 | 12 | from .i18n import _ |
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11 | 13 | from .node import ( |
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12 | 14 | bin, |
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13 | 15 | hex, |
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14 | 16 | nullid, |
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15 | 17 | ) |
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16 | 18 | |
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17 | 19 | from . import ( |
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18 | 20 | encoding, |
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19 | 21 | error, |
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20 | 22 | revlog, |
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21 | 23 | util, |
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22 | 24 | ) |
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23 | 25 | |
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24 | 26 | _defaultextra = {'branch': 'default'} |
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25 | 27 | |
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26 | 28 | def _string_escape(text): |
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27 | 29 | """ |
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28 | 30 | >>> d = {'nl': chr(10), 'bs': chr(92), 'cr': chr(13), 'nul': chr(0)} |
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29 | 31 | >>> s = "ab%(nl)scd%(bs)s%(bs)sn%(nul)sab%(cr)scd%(bs)s%(nl)s" % d |
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30 | 32 | >>> s |
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31 | 33 | 'ab\\ncd\\\\\\\\n\\x00ab\\rcd\\\\\\n' |
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32 | 34 | >>> res = _string_escape(s) |
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33 | 35 | >>> s == res.decode('string_escape') |
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34 | 36 | True |
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35 | 37 | """ |
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36 | 38 | # subset of the string_escape codec |
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37 | 39 | text = text.replace('\\', '\\\\').replace('\n', '\\n').replace('\r', '\\r') |
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38 | 40 | return text.replace('\0', '\\0') |
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39 | 41 | |
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40 | 42 | def decodeextra(text): |
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41 | 43 | """ |
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42 | 44 | >>> sorted(decodeextra(encodeextra({'foo': 'bar', 'baz': chr(0) + '2'}) |
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43 | 45 | ... ).iteritems()) |
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44 | 46 | [('baz', '\\x002'), ('branch', 'default'), ('foo', 'bar')] |
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45 | 47 | >>> sorted(decodeextra(encodeextra({'foo': 'bar', |
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46 | 48 | ... 'baz': chr(92) + chr(0) + '2'}) |
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47 | 49 | ... ).iteritems()) |
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48 | 50 | [('baz', '\\\\\\x002'), ('branch', 'default'), ('foo', 'bar')] |
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49 | 51 | """ |
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50 | 52 | extra = _defaultextra.copy() |
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51 | 53 | for l in text.split('\0'): |
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52 | 54 | if l: |
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53 | 55 | if '\\0' in l: |
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54 | 56 | # fix up \0 without getting into trouble with \\0 |
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55 | 57 | l = l.replace('\\\\', '\\\\\n') |
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56 | 58 | l = l.replace('\\0', '\0') |
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57 | 59 | l = l.replace('\n', '') |
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58 | 60 | k, v = l.decode('string_escape').split(':', 1) |
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59 | 61 | extra[k] = v |
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60 | 62 | return extra |
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61 | 63 | |
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62 | 64 | def encodeextra(d): |
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63 | 65 | # keys must be sorted to produce a deterministic changelog entry |
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64 | 66 | items = [_string_escape('%s:%s' % (k, d[k])) for k in sorted(d)] |
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65 | 67 | return "\0".join(items) |
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66 | 68 | |
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67 | 69 | def stripdesc(desc): |
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68 | 70 | """strip trailing whitespace and leading and trailing empty lines""" |
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69 | 71 | return '\n'.join([l.rstrip() for l in desc.splitlines()]).strip('\n') |
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70 | 72 | |
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71 | 73 | class appender(object): |
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72 | 74 | '''the changelog index must be updated last on disk, so we use this class |
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73 | 75 | to delay writes to it''' |
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74 | 76 | def __init__(self, vfs, name, mode, buf): |
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75 | 77 | self.data = buf |
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76 | 78 | fp = vfs(name, mode) |
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77 | 79 | self.fp = fp |
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78 | 80 | self.offset = fp.tell() |
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79 | 81 | self.size = vfs.fstat(fp).st_size |
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80 | 82 | |
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81 | 83 | def end(self): |
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82 | 84 | return self.size + len("".join(self.data)) |
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83 | 85 | def tell(self): |
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84 | 86 | return self.offset |
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85 | 87 | def flush(self): |
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86 | 88 | pass |
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87 | 89 | def close(self): |
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88 | 90 | self.fp.close() |
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89 | 91 | |
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90 | 92 | def seek(self, offset, whence=0): |
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91 | 93 | '''virtual file offset spans real file and data''' |
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92 | 94 | if whence == 0: |
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93 | 95 | self.offset = offset |
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94 | 96 | elif whence == 1: |
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95 | 97 | self.offset += offset |
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96 | 98 | elif whence == 2: |
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97 | 99 | self.offset = self.end() + offset |
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98 | 100 | if self.offset < self.size: |
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99 | 101 | self.fp.seek(self.offset) |
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100 | 102 | |
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101 | 103 | def read(self, count=-1): |
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102 | 104 | '''only trick here is reads that span real file and data''' |
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103 | 105 | ret = "" |
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104 | 106 | if self.offset < self.size: |
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105 | 107 | s = self.fp.read(count) |
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106 | 108 | ret = s |
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107 | 109 | self.offset += len(s) |
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108 | 110 | if count > 0: |
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109 | 111 | count -= len(s) |
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110 | 112 | if count != 0: |
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111 | 113 | doff = self.offset - self.size |
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112 | 114 | self.data.insert(0, "".join(self.data)) |
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113 | 115 | del self.data[1:] |
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114 | 116 | s = self.data[0][doff:doff + count] |
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115 | 117 | self.offset += len(s) |
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116 | 118 | ret += s |
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117 | 119 | return ret |
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118 | 120 | |
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119 | 121 | def write(self, s): |
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120 | 122 | self.data.append(str(s)) |
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121 | 123 | self.offset += len(s) |
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122 | 124 | |
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123 | 125 | def _divertopener(opener, target): |
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124 | 126 | """build an opener that writes in 'target.a' instead of 'target'""" |
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125 | 127 | def _divert(name, mode='r'): |
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126 | 128 | if name != target: |
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127 | 129 | return opener(name, mode) |
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128 | 130 | return opener(name + ".a", mode) |
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129 | 131 | return _divert |
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130 | 132 | |
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131 | 133 | def _delayopener(opener, target, buf): |
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132 | 134 | """build an opener that stores chunks in 'buf' instead of 'target'""" |
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133 | 135 | def _delay(name, mode='r'): |
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134 | 136 | if name != target: |
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135 | 137 | return opener(name, mode) |
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136 | 138 | return appender(opener, name, mode, buf) |
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137 | 139 | return _delay |
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138 | 140 | |
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141 | _changelogrevision = collections.namedtuple('changelogrevision', | |
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142 | ('manifest', 'user', 'date', | |
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143 | 'files', 'description', 'extra')) | |
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144 | ||
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145 | class changelogrevision(object): | |
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146 | """Holds results of a parsed changelog revision. | |
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147 | ||
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148 | Changelog revisions consist of multiple pieces of data, including | |
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149 | the manifest node, user, and date. This object exposes a view into | |
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150 | the parsed object. | |
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151 | """ | |
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152 | ||
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153 | __slots__ = ( | |
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154 | 'date', | |
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155 | 'description', | |
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156 | 'extra', | |
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157 | 'files', | |
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158 | 'manifest', | |
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159 | 'user', | |
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160 | ) | |
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161 | ||
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162 | def __new__(cls, text): | |
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163 | if not text: | |
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164 | return _changelogrevision( | |
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165 | manifest=nullid, | |
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166 | user='', | |
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167 | date=(0, 0), | |
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168 | files=[], | |
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169 | description='', | |
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170 | extra=_defaultextra, | |
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171 | ) | |
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172 | ||
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173 | self = super(changelogrevision, cls).__new__(cls) | |
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174 | # We could return here and implement the following as an __init__. | |
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175 | # But doing it here is equivalent and saves an extra function call. | |
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176 | ||
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177 | # format used: | |
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178 | # nodeid\n : manifest node in ascii | |
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179 | # user\n : user, no \n or \r allowed | |
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180 | # time tz extra\n : date (time is int or float, timezone is int) | |
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181 | # : extra is metadata, encoded and separated by '\0' | |
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182 | # : older versions ignore it | |
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183 | # files\n\n : files modified by the cset, no \n or \r allowed | |
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184 | # (.*) : comment (free text, ideally utf-8) | |
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185 | # | |
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186 | # changelog v0 doesn't use extra | |
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187 | ||
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188 | last = text.index("\n\n") | |
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189 | self.description = encoding.tolocal(text[last + 2:]) | |
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190 | l = text[:last].split('\n') | |
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191 | self.manifest = bin(l[0]) | |
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192 | self.user = encoding.tolocal(l[1]) | |
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193 | ||
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194 | tdata = l[2].split(' ', 2) | |
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195 | if len(tdata) != 3: | |
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196 | time = float(tdata[0]) | |
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197 | try: | |
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198 | # various tools did silly things with the time zone field. | |
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199 | timezone = int(tdata[1]) | |
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200 | except ValueError: | |
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201 | timezone = 0 | |
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202 | self.extra = _defaultextra | |
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203 | else: | |
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204 | time, timezone = float(tdata[0]), int(tdata[1]) | |
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205 | self.extra = decodeextra(tdata[2]) | |
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206 | ||
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207 | self.date = (time, timezone) | |
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208 | self.files = l[3:] | |
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209 | ||
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210 | return self | |
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211 | ||
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139 | 212 | class changelog(revlog.revlog): |
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140 | 213 | def __init__(self, opener): |
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141 | 214 | revlog.revlog.__init__(self, opener, "00changelog.i") |
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142 | 215 | if self._initempty: |
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143 | 216 | # changelogs don't benefit from generaldelta |
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144 | 217 | self.version &= ~revlog.REVLOGGENERALDELTA |
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145 | 218 | self._generaldelta = False |
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146 | 219 | self._realopener = opener |
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147 | 220 | self._delayed = False |
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148 | 221 | self._delaybuf = None |
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149 | 222 | self._divert = False |
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150 | 223 | self.filteredrevs = frozenset() |
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151 | 224 | |
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152 | 225 | def tip(self): |
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153 | 226 | """filtered version of revlog.tip""" |
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154 | 227 | for i in xrange(len(self) -1, -2, -1): |
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155 | 228 | if i not in self.filteredrevs: |
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156 | 229 | return self.node(i) |
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157 | 230 | |
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158 | 231 | def __contains__(self, rev): |
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159 | 232 | """filtered version of revlog.__contains__""" |
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160 | 233 | return (0 <= rev < len(self) |
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161 | 234 | and rev not in self.filteredrevs) |
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162 | 235 | |
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163 | 236 | def __iter__(self): |
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164 | 237 | """filtered version of revlog.__iter__""" |
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165 | 238 | if len(self.filteredrevs) == 0: |
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166 | 239 | return revlog.revlog.__iter__(self) |
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167 | 240 | |
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168 | 241 | def filterediter(): |
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169 | 242 | for i in xrange(len(self)): |
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170 | 243 | if i not in self.filteredrevs: |
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171 | 244 | yield i |
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172 | 245 | |
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173 | 246 | return filterediter() |
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174 | 247 | |
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175 | 248 | def revs(self, start=0, stop=None): |
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176 | 249 | """filtered version of revlog.revs""" |
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177 | 250 | for i in super(changelog, self).revs(start, stop): |
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178 | 251 | if i not in self.filteredrevs: |
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179 | 252 | yield i |
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180 | 253 | |
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181 | 254 | @util.propertycache |
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182 | 255 | def nodemap(self): |
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183 | 256 | # XXX need filtering too |
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184 | 257 | self.rev(self.node(0)) |
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185 | 258 | return self._nodecache |
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186 | 259 | |
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187 | 260 | def reachableroots(self, minroot, heads, roots, includepath=False): |
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188 | 261 | return self.index.reachableroots2(minroot, heads, roots, includepath) |
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189 | 262 | |
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190 | 263 | def headrevs(self): |
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191 | 264 | if self.filteredrevs: |
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192 | 265 | try: |
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193 | 266 | return self.index.headrevsfiltered(self.filteredrevs) |
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194 | 267 | # AttributeError covers non-c-extension environments and |
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195 | 268 | # old c extensions without filter handling. |
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196 | 269 | except AttributeError: |
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197 | 270 | return self._headrevs() |
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198 | 271 | |
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199 | 272 | return super(changelog, self).headrevs() |
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200 | 273 | |
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201 | 274 | def strip(self, *args, **kwargs): |
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202 | 275 | # XXX make something better than assert |
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203 | 276 | # We can't expect proper strip behavior if we are filtered. |
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204 | 277 | assert not self.filteredrevs |
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205 | 278 | super(changelog, self).strip(*args, **kwargs) |
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206 | 279 | |
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207 | 280 | def rev(self, node): |
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208 | 281 | """filtered version of revlog.rev""" |
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209 | 282 | r = super(changelog, self).rev(node) |
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210 | 283 | if r in self.filteredrevs: |
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211 | 284 | raise error.FilteredLookupError(hex(node), self.indexfile, |
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212 | 285 | _('filtered node')) |
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213 | 286 | return r |
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214 | 287 | |
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215 | 288 | def node(self, rev): |
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216 | 289 | """filtered version of revlog.node""" |
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217 | 290 | if rev in self.filteredrevs: |
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218 | 291 | raise error.FilteredIndexError(rev) |
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219 | 292 | return super(changelog, self).node(rev) |
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220 | 293 | |
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221 | 294 | def linkrev(self, rev): |
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222 | 295 | """filtered version of revlog.linkrev""" |
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223 | 296 | if rev in self.filteredrevs: |
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224 | 297 | raise error.FilteredIndexError(rev) |
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225 | 298 | return super(changelog, self).linkrev(rev) |
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226 | 299 | |
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227 | 300 | def parentrevs(self, rev): |
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228 | 301 | """filtered version of revlog.parentrevs""" |
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229 | 302 | if rev in self.filteredrevs: |
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230 | 303 | raise error.FilteredIndexError(rev) |
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231 | 304 | return super(changelog, self).parentrevs(rev) |
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232 | 305 | |
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233 | 306 | def flags(self, rev): |
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234 | 307 | """filtered version of revlog.flags""" |
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235 | 308 | if rev in self.filteredrevs: |
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236 | 309 | raise error.FilteredIndexError(rev) |
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237 | 310 | return super(changelog, self).flags(rev) |
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238 | 311 | |
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239 | 312 | def delayupdate(self, tr): |
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240 | 313 | "delay visibility of index updates to other readers" |
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241 | 314 | |
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242 | 315 | if not self._delayed: |
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243 | 316 | if len(self) == 0: |
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244 | 317 | self._divert = True |
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245 | 318 | if self._realopener.exists(self.indexfile + '.a'): |
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246 | 319 | self._realopener.unlink(self.indexfile + '.a') |
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247 | 320 | self.opener = _divertopener(self._realopener, self.indexfile) |
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248 | 321 | else: |
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249 | 322 | self._delaybuf = [] |
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250 | 323 | self.opener = _delayopener(self._realopener, self.indexfile, |
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251 | 324 | self._delaybuf) |
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252 | 325 | self._delayed = True |
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253 | 326 | tr.addpending('cl-%i' % id(self), self._writepending) |
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254 | 327 | tr.addfinalize('cl-%i' % id(self), self._finalize) |
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255 | 328 | |
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256 | 329 | def _finalize(self, tr): |
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257 | 330 | "finalize index updates" |
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258 | 331 | self._delayed = False |
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259 | 332 | self.opener = self._realopener |
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260 | 333 | # move redirected index data back into place |
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261 | 334 | if self._divert: |
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262 | 335 | assert not self._delaybuf |
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263 | 336 | tmpname = self.indexfile + ".a" |
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264 | 337 | nfile = self.opener.open(tmpname) |
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265 | 338 | nfile.close() |
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266 | 339 | self.opener.rename(tmpname, self.indexfile) |
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267 | 340 | elif self._delaybuf: |
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268 | 341 | fp = self.opener(self.indexfile, 'a') |
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269 | 342 | fp.write("".join(self._delaybuf)) |
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270 | 343 | fp.close() |
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271 | 344 | self._delaybuf = None |
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272 | 345 | self._divert = False |
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273 | 346 | # split when we're done |
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274 | 347 | self.checkinlinesize(tr) |
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275 | 348 | |
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276 | 349 | def readpending(self, file): |
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277 | 350 | """read index data from a "pending" file |
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278 | 351 | |
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279 | 352 | During a transaction, the actual changeset data is already stored in the |
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280 | 353 | main file, but not yet finalized in the on-disk index. Instead, a |
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281 | 354 | "pending" index is written by the transaction logic. If this function |
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282 | 355 | is running, we are likely in a subprocess invoked in a hook. The |
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283 | 356 | subprocess is informed that it is within a transaction and needs to |
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284 | 357 | access its content. |
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285 | 358 | |
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286 | 359 | This function will read all the index data out of the pending file and |
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287 | 360 | overwrite the main index.""" |
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288 | 361 | |
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289 | 362 | if not self.opener.exists(file): |
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290 | 363 | return # no pending data for changelog |
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291 | 364 | r = revlog.revlog(self.opener, file) |
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292 | 365 | self.index = r.index |
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293 | 366 | self.nodemap = r.nodemap |
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294 | 367 | self._nodecache = r._nodecache |
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295 | 368 | self._chunkcache = r._chunkcache |
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296 | 369 | |
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297 | 370 | def _writepending(self, tr): |
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298 | 371 | "create a file containing the unfinalized state for pretxnchangegroup" |
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299 | 372 | if self._delaybuf: |
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300 | 373 | # make a temporary copy of the index |
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301 | 374 | fp1 = self._realopener(self.indexfile) |
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302 | 375 | pendingfilename = self.indexfile + ".a" |
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303 | 376 | # register as a temp file to ensure cleanup on failure |
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304 | 377 | tr.registertmp(pendingfilename) |
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305 | 378 | # write existing data |
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306 | 379 | fp2 = self._realopener(pendingfilename, "w") |
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307 | 380 | fp2.write(fp1.read()) |
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308 | 381 | # add pending data |
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309 | 382 | fp2.write("".join(self._delaybuf)) |
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310 | 383 | fp2.close() |
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311 | 384 | # switch modes so finalize can simply rename |
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312 | 385 | self._delaybuf = None |
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313 | 386 | self._divert = True |
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314 | 387 | self.opener = _divertopener(self._realopener, self.indexfile) |
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315 | 388 | |
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316 | 389 | if self._divert: |
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317 | 390 | return True |
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318 | 391 | |
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319 | 392 | return False |
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320 | 393 | |
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321 | 394 | def checkinlinesize(self, tr, fp=None): |
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322 | 395 | if not self._delayed: |
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323 | 396 | revlog.revlog.checkinlinesize(self, tr, fp) |
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324 | 397 | |
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325 | 398 | def read(self, node): |
|
326 | """ | |
|
327 | format used: | |
|
328 | nodeid\n : manifest node in ascii | |
|
329 | user\n : user, no \n or \r allowed | |
|
330 | time tz extra\n : date (time is int or float, timezone is int) | |
|
331 | : extra is metadata, encoded and separated by '\0' | |
|
332 | : older versions ignore it | |
|
333 | files\n\n : files modified by the cset, no \n or \r allowed | |
|
334 | (.*) : comment (free text, ideally utf-8) | |
|
399 | """Obtain data from a parsed changelog revision. | |
|
400 | ||
|
401 | Returns a 6-tuple of: | |
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335 | 402 | |
|
336 | changelog v0 doesn't use extra | |
|
403 | - manifest node in binary | |
|
404 | - author/user as a localstr | |
|
405 | - date as a 2-tuple of (time, timezone) | |
|
406 | - list of files | |
|
407 | - commit message as a localstr | |
|
408 | - dict of extra metadata | |
|
409 | ||
|
410 | Unless you need to access all fields, consider calling | |
|
411 | ``changelogrevision`` instead, as it is faster for partial object | |
|
412 | access. | |
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337 | 413 | """ |
|
338 |
|
|
|
339 | if not text: | |
|
340 | return nullid, "", (0, 0), [], "", _defaultextra | |
|
341 | last = text.index("\n\n") | |
|
342 | desc = encoding.tolocal(text[last + 2:]) | |
|
343 | l = text[:last].split('\n') | |
|
344 | manifest = bin(l[0]) | |
|
345 | user = encoding.tolocal(l[1]) | |
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414 | c = changelogrevision(self.revision(node)) | |
|
415 | return ( | |
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416 | c.manifest, | |
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417 | c.user, | |
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418 | c.date, | |
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419 | c.files, | |
|
420 | c.description, | |
|
421 | c.extra | |
|
422 | ) | |
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346 | 423 | |
|
347 | tdata = l[2].split(' ', 2) | |
|
348 | if len(tdata) != 3: | |
|
349 | time = float(tdata[0]) | |
|
350 | try: | |
|
351 | # various tools did silly things with the time zone field. | |
|
352 | timezone = int(tdata[1]) | |
|
353 | except ValueError: | |
|
354 | timezone = 0 | |
|
355 | extra = _defaultextra | |
|
356 | else: | |
|
357 | time, timezone = float(tdata[0]), int(tdata[1]) | |
|
358 | extra = decodeextra(tdata[2]) | |
|
359 | ||
|
360 | files = l[3:] | |
|
361 | return manifest, user, (time, timezone), files, desc, extra | |
|
424 | def changelogrevision(self, nodeorrev): | |
|
425 | """Obtain a ``changelogrevision`` for a node or revision.""" | |
|
426 | return changelogrevision(self.revision(nodeorrev)) | |
|
362 | 427 | |
|
363 | 428 | def readfiles(self, node): |
|
364 | 429 | """ |
|
365 | 430 | short version of read that only returns the files modified by the cset |
|
366 | 431 | """ |
|
367 | 432 | text = self.revision(node) |
|
368 | 433 | if not text: |
|
369 | 434 | return [] |
|
370 | 435 | last = text.index("\n\n") |
|
371 | 436 | l = text[:last].split('\n') |
|
372 | 437 | return l[3:] |
|
373 | 438 | |
|
374 | 439 | def add(self, manifest, files, desc, transaction, p1, p2, |
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375 | 440 | user, date=None, extra=None): |
|
376 | 441 | # Convert to UTF-8 encoded bytestrings as the very first |
|
377 | 442 | # thing: calling any method on a localstr object will turn it |
|
378 | 443 | # into a str object and the cached UTF-8 string is thus lost. |
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379 | 444 | user, desc = encoding.fromlocal(user), encoding.fromlocal(desc) |
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380 | 445 | |
|
381 | 446 | user = user.strip() |
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382 | 447 | # An empty username or a username with a "\n" will make the |
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383 | 448 | # revision text contain two "\n\n" sequences -> corrupt |
|
384 | 449 | # repository since read cannot unpack the revision. |
|
385 | 450 | if not user: |
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386 | 451 | raise error.RevlogError(_("empty username")) |
|
387 | 452 | if "\n" in user: |
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388 | 453 | raise error.RevlogError(_("username %s contains a newline") |
|
389 | 454 | % repr(user)) |
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390 | 455 | |
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391 | 456 | desc = stripdesc(desc) |
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392 | 457 | |
|
393 | 458 | if date: |
|
394 | 459 | parseddate = "%d %d" % util.parsedate(date) |
|
395 | 460 | else: |
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396 | 461 | parseddate = "%d %d" % util.makedate() |
|
397 | 462 | if extra: |
|
398 | 463 | branch = extra.get("branch") |
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399 | 464 | if branch in ("default", ""): |
|
400 | 465 | del extra["branch"] |
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401 | 466 | elif branch in (".", "null", "tip"): |
|
402 | 467 | raise error.RevlogError(_('the name \'%s\' is reserved') |
|
403 | 468 | % branch) |
|
404 | 469 | if extra: |
|
405 | 470 | extra = encodeextra(extra) |
|
406 | 471 | parseddate = "%s %s" % (parseddate, extra) |
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407 | 472 | l = [hex(manifest), user, parseddate] + sorted(files) + ["", desc] |
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408 | 473 | text = "\n".join(l) |
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409 | 474 | return self.addrevision(text, transaction, len(self), p1, p2) |
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410 | 475 | |
|
411 | 476 | def branchinfo(self, rev): |
|
412 | 477 | """return the branch name and open/close state of a revision |
|
413 | 478 | |
|
414 | 479 | This function exists because creating a changectx object |
|
415 | 480 | just to access this is costly.""" |
|
416 | 481 | extra = self.read(rev)[5] |
|
417 | 482 | return encoding.tolocal(extra.get("branch")), 'close' in extra |
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