Mercurial > hg
annotate hgext/eol.py @ 29039:e3055b46ed1b stable
tags: silence hgtagsfnodes reading failures
tryread() doesn't handle "is a directory" errors and presumably
others. We might not want to globally swallow such tryread errors, so
we replace with our own try/except handling.
An upcoming test will use directories as a portable stand-in for
various bizarre circumstances that cache read/write code should be
robust to.
author | Matt Mackall <mpm@selenic.com> |
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date | Thu, 28 Apr 2016 15:40:43 -0500 |
parents | cca011fd1ea7 |
children | d5883fd055c6 |
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1 """automatically manage newlines in repository files |
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2 |
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3 This extension allows you to manage the type of line endings (CRLF or |
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4 LF) that are used in the repository and in the local working |
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5 directory. That way you can get CRLF line endings on Windows and LF on |
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6 Unix/Mac, thereby letting everybody use their OS native line endings. |
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7 |
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8 The extension reads its configuration from a versioned ``.hgeol`` |
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9 configuration file found in the root of the working directory. The |
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10 ``.hgeol`` file use the same syntax as all other Mercurial |
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11 configuration files. It uses two sections, ``[patterns]`` and |
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12 ``[repository]``. |
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13 |
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14 The ``[patterns]`` section specifies how line endings should be |
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15 converted between the working directory and the repository. The format is |
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16 specified by a file pattern. The first match is used, so put more |
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17 specific patterns first. The available line endings are ``LF``, |
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18 ``CRLF``, and ``BIN``. |
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19 |
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20 Files with the declared format of ``CRLF`` or ``LF`` are always |
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21 checked out and stored in the repository in that format and files |
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22 declared to be binary (``BIN``) are left unchanged. Additionally, |
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23 ``native`` is an alias for checking out in the platform's default line |
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24 ending: ``LF`` on Unix (including Mac OS X) and ``CRLF`` on |
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25 Windows. Note that ``BIN`` (do nothing to line endings) is Mercurial's |
26098 | 26 default behavior; it is only needed if you need to override a later, |
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27 more general pattern. |
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28 |
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29 The optional ``[repository]`` section specifies the line endings to |
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30 use for files stored in the repository. It has a single setting, |
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31 ``native``, which determines the storage line endings for files |
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32 declared as ``native`` in the ``[patterns]`` section. It can be set to |
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33 ``LF`` or ``CRLF``. The default is ``LF``. For example, this means |
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34 that on Windows, files configured as ``native`` (``CRLF`` by default) |
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35 will be converted to ``LF`` when stored in the repository. Files |
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36 declared as ``LF``, ``CRLF``, or ``BIN`` in the ``[patterns]`` section |
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37 are always stored as-is in the repository. |
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38 |
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39 Example versioned ``.hgeol`` file:: |
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40 |
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41 [patterns] |
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42 **.py = native |
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43 **.vcproj = CRLF |
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44 **.txt = native |
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45 Makefile = LF |
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46 **.jpg = BIN |
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47 |
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48 [repository] |
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49 native = LF |
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50 |
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51 .. note:: |
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52 |
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53 The rules will first apply when files are touched in the working |
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54 directory, e.g. by updating to null and back to tip to touch all files. |
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55 |
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56 The extension uses an optional ``[eol]`` section read from both the |
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57 normal Mercurial configuration files and the ``.hgeol`` file, with the |
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58 latter overriding the former. You can use that section to control the |
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59 overall behavior. There are three settings: |
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60 |
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61 - ``eol.native`` (default ``os.linesep``) can be set to ``LF`` or |
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62 ``CRLF`` to override the default interpretation of ``native`` for |
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63 checkout. This can be used with :hg:`archive` on Unix, say, to |
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64 generate an archive where files have line endings for Windows. |
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65 |
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66 - ``eol.only-consistent`` (default True) can be set to False to make |
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67 the extension convert files with inconsistent EOLs. Inconsistent |
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68 means that there is both ``CRLF`` and ``LF`` present in the file. |
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69 Such files are normally not touched under the assumption that they |
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70 have mixed EOLs on purpose. |
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71 |
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72 - ``eol.fix-trailing-newline`` (default False) can be set to True to |
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73 ensure that converted files end with a EOL character (either ``\\n`` |
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74 or ``\\r\\n`` as per the configured patterns). |
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75 |
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76 The extension provides ``cleverencode:`` and ``cleverdecode:`` filters |
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77 like the deprecated win32text extension does. This means that you can |
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78 disable win32text and enable eol and your filters will still work. You |
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79 only need to these filters until you have prepared a ``.hgeol`` file. |
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80 |
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81 The ``win32text.forbid*`` hooks provided by the win32text extension |
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82 have been unified into a single hook named ``eol.checkheadshook``. The |
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83 hook will lookup the expected line endings from the ``.hgeol`` file, |
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84 which means you must migrate to a ``.hgeol`` file first before using |
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85 the hook. ``eol.checkheadshook`` only checks heads, intermediate |
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86 invalid revisions will be pushed. To forbid them completely, use the |
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87 ``eol.checkallhook`` hook. These hooks are best used as |
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88 ``pretxnchangegroup`` hooks. |
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89 |
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90 See :hg:`help patterns` for more information about the glob patterns |
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91 used. |
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92 """ |
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93 |
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94 from __future__ import absolute_import |
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95 |
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96 import os |
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97 import re |
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98 from mercurial.i18n import _ |
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99 from mercurial import ( |
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100 config, |
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101 error, |
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102 extensions, |
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103 match, |
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104 util, |
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105 ) |
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106 |
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107 # Note for extension authors: ONLY specify testedwith = 'internal' for |
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108 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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109 # be specifying the version(s) of Mercurial they are tested with, or |
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110 # leave the attribute unspecified. |
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111 testedwith = 'internal' |
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112 |
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113 # Matches a lone LF, i.e., one that is not part of CRLF. |
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114 singlelf = re.compile('(^|[^\r])\n') |
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115 # Matches a single EOL which can either be a CRLF where repeated CR |
17501 | 116 # are removed or a LF. We do not care about old Macintosh files, so a |
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117 # stray CR is an error. |
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118 eolre = re.compile('\r*\n') |
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119 |
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120 |
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121 def inconsistenteol(data): |
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122 return '\r\n' in data and singlelf.search(data) |
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123 |
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124 def tolf(s, params, ui, **kwargs): |
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125 """Filter to convert to LF EOLs.""" |
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126 if util.binary(s): |
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127 return s |
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128 if ui.configbool('eol', 'only-consistent', True) and inconsistenteol(s): |
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129 return s |
16683 | 130 if (ui.configbool('eol', 'fix-trailing-newline', False) |
131 and s and s[-1] != '\n'): | |
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132 s = s + '\n' |
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133 return eolre.sub('\n', s) |
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134 |
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135 def tocrlf(s, params, ui, **kwargs): |
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136 """Filter to convert to CRLF EOLs.""" |
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137 if util.binary(s): |
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138 return s |
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139 if ui.configbool('eol', 'only-consistent', True) and inconsistenteol(s): |
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140 return s |
16683 | 141 if (ui.configbool('eol', 'fix-trailing-newline', False) |
142 and s and s[-1] != '\n'): | |
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143 s = s + '\n' |
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144 return eolre.sub('\r\n', s) |
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145 |
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146 def isbinary(s, params): |
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147 """Filter to do nothing with the file.""" |
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148 return s |
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149 |
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150 filters = { |
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151 'to-lf': tolf, |
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152 'to-crlf': tocrlf, |
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153 'is-binary': isbinary, |
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154 # The following provide backwards compatibility with win32text |
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155 'cleverencode:': tolf, |
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156 'cleverdecode:': tocrlf |
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157 } |
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158 |
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159 class eolfile(object): |
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160 def __init__(self, ui, root, data): |
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161 self._decode = {'LF': 'to-lf', 'CRLF': 'to-crlf', 'BIN': 'is-binary'} |
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162 self._encode = {'LF': 'to-lf', 'CRLF': 'to-crlf', 'BIN': 'is-binary'} |
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163 |
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164 self.cfg = config.config() |
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165 # Our files should not be touched. The pattern must be |
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166 # inserted first override a '** = native' pattern. |
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167 self.cfg.set('patterns', '.hg*', 'BIN', 'eol') |
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168 # We can then parse the user's patterns. |
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169 self.cfg.parse('.hgeol', data) |
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170 |
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171 isrepolf = self.cfg.get('repository', 'native') != 'CRLF' |
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172 self._encode['NATIVE'] = isrepolf and 'to-lf' or 'to-crlf' |
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173 iswdlf = ui.config('eol', 'native', os.linesep) in ('LF', '\n') |
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174 self._decode['NATIVE'] = iswdlf and 'to-lf' or 'to-crlf' |
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175 |
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176 include = [] |
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177 exclude = [] |
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178 for pattern, style in self.cfg.items('patterns'): |
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179 key = style.upper() |
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180 if key == 'BIN': |
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181 exclude.append(pattern) |
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182 else: |
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183 include.append(pattern) |
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184 # This will match the files for which we need to care |
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185 # about inconsistent newlines. |
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186 self.match = match.match(root, '', [], include, exclude) |
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187 |
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188 def copytoui(self, ui): |
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189 for pattern, style in self.cfg.items('patterns'): |
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190 key = style.upper() |
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191 try: |
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192 ui.setconfig('decode', pattern, self._decode[key], 'eol') |
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193 ui.setconfig('encode', pattern, self._encode[key], 'eol') |
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194 except KeyError: |
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195 ui.warn(_("ignoring unknown EOL style '%s' from %s\n") |
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196 % (style, self.cfg.source('patterns', pattern))) |
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197 # eol.only-consistent can be specified in ~/.hgrc or .hgeol |
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198 for k, v in self.cfg.items('eol'): |
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199 ui.setconfig('eol', k, v, 'eol') |
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200 |
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201 def checkrev(self, repo, ctx, files): |
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202 failed = [] |
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203 for f in (files or ctx.files()): |
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204 if f not in ctx: |
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205 continue |
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206 for pattern, style in self.cfg.items('patterns'): |
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207 if not match.match(repo.root, '', [pattern])(f): |
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208 continue |
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209 target = self._encode[style.upper()] |
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210 data = ctx[f].data() |
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211 if (target == "to-lf" and "\r\n" in data |
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212 or target == "to-crlf" and singlelf.search(data)): |
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213 failed.append((f, target, str(ctx))) |
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214 break |
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215 return failed |
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216 |
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217 def parseeol(ui, repo, nodes): |
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218 try: |
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219 for node in nodes: |
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220 try: |
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221 if node is None: |
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222 # Cannot use workingctx.data() since it would load |
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223 # and cache the filters before we configure them. |
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224 data = repo.wfile('.hgeol').read() |
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225 else: |
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226 data = repo[node]['.hgeol'].data() |
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227 return eolfile(ui, repo.root, data) |
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228 except (IOError, LookupError): |
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229 pass |
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230 except error.ParseError as inst: |
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231 ui.warn(_("warning: ignoring .hgeol file due to parse error " |
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232 "at %s: %s\n") % (inst.args[1], inst.args[0])) |
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233 return None |
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234 |
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235 def _checkhook(ui, repo, node, headsonly): |
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236 # Get revisions to check and touched files at the same time |
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237 files = set() |
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238 revs = set() |
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239 for rev in xrange(repo[node].rev(), len(repo)): |
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240 revs.add(rev) |
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241 if headsonly: |
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242 ctx = repo[rev] |
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243 files.update(ctx.files()) |
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244 for pctx in ctx.parents(): |
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245 revs.discard(pctx.rev()) |
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246 failed = [] |
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247 for rev in revs: |
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248 ctx = repo[rev] |
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249 eol = parseeol(ui, repo, [ctx.node()]) |
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250 if eol: |
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251 failed.extend(eol.checkrev(repo, ctx, files)) |
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252 |
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253 if failed: |
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254 eols = {'to-lf': 'CRLF', 'to-crlf': 'LF'} |
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255 msgs = [] |
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256 for f, target, node in sorted(failed): |
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257 msgs.append(_(" %s in %s should not have %s line endings") % |
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258 (f, node, eols[target])) |
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259 raise error.Abort(_("end-of-line check failed:\n") + "\n".join(msgs)) |
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260 |
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261 def checkallhook(ui, repo, node, hooktype, **kwargs): |
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262 """verify that files have expected EOLs""" |
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263 _checkhook(ui, repo, node, False) |
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264 |
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265 def checkheadshook(ui, repo, node, hooktype, **kwargs): |
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266 """verify that files have expected EOLs""" |
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267 _checkhook(ui, repo, node, True) |
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268 |
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269 # "checkheadshook" used to be called "hook" |
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270 hook = checkheadshook |
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271 |
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272 def preupdate(ui, repo, hooktype, parent1, parent2): |
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273 repo.loadeol([parent1]) |
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274 return False |
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275 |
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276 def uisetup(ui): |
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277 ui.setconfig('hooks', 'preupdate.eol', preupdate, 'eol') |
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278 |
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279 def extsetup(ui): |
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280 try: |
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281 extensions.find('win32text') |
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282 ui.warn(_("the eol extension is incompatible with the " |
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283 "win32text extension\n")) |
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284 except KeyError: |
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285 pass |
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286 |
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287 |
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288 def reposetup(ui, repo): |
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289 uisetup(repo.ui) |
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290 |
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291 if not repo.local(): |
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292 return |
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293 for name, fn in filters.iteritems(): |
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294 repo.adddatafilter(name, fn) |
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295 |
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296 ui.setconfig('patch', 'eol', 'auto', 'eol') |
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297 |
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298 class eolrepo(repo.__class__): |
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299 |
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300 def loadeol(self, nodes): |
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301 eol = parseeol(self.ui, self, nodes) |
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302 if eol is None: |
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303 return None |
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304 eol.copytoui(self.ui) |
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305 return eol.match |
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306 |
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307 def _hgcleardirstate(self): |
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308 self._eolfile = self.loadeol([None, 'tip']) |
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309 if not self._eolfile: |
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310 self._eolfile = util.never |
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311 return |
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312 |
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313 try: |
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314 cachemtime = os.path.getmtime(self.join("eol.cache")) |
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315 except OSError: |
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316 cachemtime = 0 |
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317 |
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318 try: |
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319 eolmtime = os.path.getmtime(self.wjoin(".hgeol")) |
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320 except OSError: |
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321 eolmtime = 0 |
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322 |
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323 if eolmtime > cachemtime: |
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324 self.ui.debug("eol: detected change in .hgeol\n") |
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325 wlock = None |
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326 try: |
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327 wlock = self.wlock() |
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328 for f in self.dirstate: |
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329 if self.dirstate[f] == 'n': |
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330 # all normal files need to be looked at |
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331 # again since the new .hgeol file might no |
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332 # longer match a file it matched before |
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333 self.dirstate.normallookup(f) |
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|
334 # Create or touch the cache to update mtime |
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|
335 self.vfs("eol.cache", "w").close() |
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336 wlock.release() |
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337 except error.LockUnavailable: |
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338 # If we cannot lock the repository and clear the |
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339 # dirstate, then a commit might not see all files |
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340 # as modified. But if we cannot lock the |
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341 # repository, then we can also not make a commit, |
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342 # so ignore the error. |
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343 pass |
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344 |
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345 def commitctx(self, ctx, haserror=False): |
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346 for f in sorted(ctx.added() + ctx.modified()): |
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347 if not self._eolfile(f): |
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348 continue |
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349 fctx = ctx[f] |
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|
350 if fctx is None: |
14862
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351 continue |
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352 data = fctx.data() |
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353 if util.binary(data): |
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354 # We should not abort here, since the user should |
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355 # be able to say "** = native" to automatically |
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356 # have all non-binary files taken care of. |
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357 continue |
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358 if inconsistenteol(data): |
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359 raise error.Abort(_("inconsistent newline style " |
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360 "in %s\n") % f) |
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361 return super(eolrepo, self).commitctx(ctx, haserror) |
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362 repo.__class__ = eolrepo |
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363 repo._hgcleardirstate() |