Mercurial > hg
annotate hgext/eol.py @ 38722:2009d84f245a
hook: disable the shell to native command translation by default
There are other things I want to add like ~ expansion and translating single to
double quotes for cmd.exe. So off by default is safer.
I'm having second thoughts about the name, but I don't have any better ideas.
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Sun, 15 Jul 2018 23:46:09 -0400 |
parents | f47608575c10 |
children | e7aa113b14f7 |
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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 as errormod, |
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102 extensions, |
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103 match, |
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104 pycompat, |
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105 registrar, |
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106 scmutil, |
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107 util, |
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108 ) |
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109 from mercurial.utils import ( |
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110 stringutil, |
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111 ) |
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112 |
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113 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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114 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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115 # be specifying the version(s) of Mercurial they are tested with, or |
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116 # leave the attribute unspecified. |
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117 testedwith = 'ships-with-hg-core' |
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118 |
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119 configtable = {} |
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120 configitem = registrar.configitem(configtable) |
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121 |
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122 configitem('eol', 'fix-trailing-newline', |
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123 default=False, |
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124 ) |
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125 configitem('eol', 'native', |
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126 default=pycompat.oslinesep, |
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127 ) |
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128 configitem('eol', 'only-consistent', |
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129 default=True, |
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130 ) |
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131 |
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132 # Matches a lone LF, i.e., one that is not part of CRLF. |
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133 singlelf = re.compile('(^|[^\r])\n') |
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134 |
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135 def inconsistenteol(data): |
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136 return '\r\n' in data and singlelf.search(data) |
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137 |
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138 def tolf(s, params, ui, **kwargs): |
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139 """Filter to convert to LF EOLs.""" |
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140 if stringutil.binary(s): |
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141 return s |
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142 if ui.configbool('eol', 'only-consistent') and inconsistenteol(s): |
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143 return s |
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144 if (ui.configbool('eol', 'fix-trailing-newline') |
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145 and s and not s.endswith('\n')): |
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146 s = s + '\n' |
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147 return util.tolf(s) |
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148 |
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149 def tocrlf(s, params, ui, **kwargs): |
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150 """Filter to convert to CRLF EOLs.""" |
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151 if stringutil.binary(s): |
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152 return s |
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153 if ui.configbool('eol', 'only-consistent') and inconsistenteol(s): |
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154 return s |
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155 if (ui.configbool('eol', 'fix-trailing-newline') |
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156 and s and not s.endswith('\n')): |
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157 s = s + '\n' |
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158 return util.tocrlf(s) |
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159 |
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160 def isbinary(s, params): |
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161 """Filter to do nothing with the file.""" |
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162 return s |
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163 |
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164 filters = { |
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165 'to-lf': tolf, |
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166 'to-crlf': tocrlf, |
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167 'is-binary': isbinary, |
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168 # The following provide backwards compatibility with win32text |
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169 'cleverencode:': tolf, |
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170 'cleverdecode:': tocrlf |
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171 } |
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172 |
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173 class eolfile(object): |
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174 def __init__(self, ui, root, data): |
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175 self._decode = {'LF': 'to-lf', 'CRLF': 'to-crlf', 'BIN': 'is-binary'} |
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176 self._encode = {'LF': 'to-lf', 'CRLF': 'to-crlf', 'BIN': 'is-binary'} |
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177 |
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178 self.cfg = config.config() |
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179 # Our files should not be touched. The pattern must be |
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180 # inserted first override a '** = native' pattern. |
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181 self.cfg.set('patterns', '.hg*', 'BIN', 'eol') |
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182 # We can then parse the user's patterns. |
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183 self.cfg.parse('.hgeol', data) |
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184 |
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185 isrepolf = self.cfg.get('repository', 'native') != 'CRLF' |
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186 self._encode['NATIVE'] = isrepolf and 'to-lf' or 'to-crlf' |
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187 iswdlf = ui.config('eol', 'native') in ('LF', '\n') |
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188 self._decode['NATIVE'] = iswdlf and 'to-lf' or 'to-crlf' |
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189 |
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190 include = [] |
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191 exclude = [] |
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192 self.patterns = [] |
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193 for pattern, style in self.cfg.items('patterns'): |
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194 key = style.upper() |
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195 if key == 'BIN': |
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196 exclude.append(pattern) |
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197 else: |
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198 include.append(pattern) |
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199 m = match.match(root, '', [pattern]) |
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200 self.patterns.append((pattern, key, m)) |
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201 # This will match the files for which we need to care |
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202 # about inconsistent newlines. |
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203 self.match = match.match(root, '', [], include, exclude) |
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204 |
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205 def copytoui(self, ui): |
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206 for pattern, key, m in self.patterns: |
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207 try: |
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208 ui.setconfig('decode', pattern, self._decode[key], 'eol') |
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209 ui.setconfig('encode', pattern, self._encode[key], 'eol') |
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210 except KeyError: |
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211 ui.warn(_("ignoring unknown EOL style '%s' from %s\n") |
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212 % (key, self.cfg.source('patterns', pattern))) |
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213 # eol.only-consistent can be specified in ~/.hgrc or .hgeol |
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214 for k, v in self.cfg.items('eol'): |
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215 ui.setconfig('eol', k, v, 'eol') |
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216 |
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217 def checkrev(self, repo, ctx, files): |
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218 failed = [] |
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219 for f in (files or ctx.files()): |
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220 if f not in ctx: |
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221 continue |
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222 for pattern, key, m in self.patterns: |
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223 if not m(f): |
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224 continue |
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225 target = self._encode[key] |
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226 data = ctx[f].data() |
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227 if (target == "to-lf" and "\r\n" in data |
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228 or target == "to-crlf" and singlelf.search(data)): |
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229 failed.append((f, target, bytes(ctx))) |
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230 break |
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231 return failed |
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232 |
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233 def parseeol(ui, repo, nodes): |
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234 try: |
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235 for node in nodes: |
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236 try: |
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237 if node is None: |
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238 # Cannot use workingctx.data() since it would load |
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239 # and cache the filters before we configure them. |
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240 data = repo.wvfs('.hgeol').read() |
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241 else: |
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242 data = repo[node]['.hgeol'].data() |
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243 return eolfile(ui, repo.root, data) |
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244 except (IOError, LookupError): |
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245 pass |
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246 except errormod.ParseError as inst: |
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247 ui.warn(_("warning: ignoring .hgeol file due to parse error " |
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248 "at %s: %s\n") % (inst.args[1], inst.args[0])) |
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249 return None |
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250 |
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251 def ensureenabled(ui): |
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252 """make sure the extension is enabled when used as hook |
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253 |
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254 When eol is used through hooks, the extension is never formally loaded and |
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255 enabled. This has some side effect, for example the config declaration is |
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256 never loaded. This function ensure the extension is enabled when running |
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257 hooks. |
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258 """ |
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259 if 'eol' in ui._knownconfig: |
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260 return |
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261 ui.setconfig('extensions', 'eol', '', source='internal') |
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262 extensions.loadall(ui, ['eol']) |
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263 |
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264 def _checkhook(ui, repo, node, headsonly): |
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265 # Get revisions to check and touched files at the same time |
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266 ensureenabled(ui) |
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267 files = set() |
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268 revs = set() |
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269 for rev in xrange(repo[node].rev(), len(repo)): |
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270 revs.add(rev) |
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271 if headsonly: |
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272 ctx = repo[rev] |
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273 files.update(ctx.files()) |
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274 for pctx in ctx.parents(): |
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275 revs.discard(pctx.rev()) |
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276 failed = [] |
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277 for rev in revs: |
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278 ctx = repo[rev] |
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279 eol = parseeol(ui, repo, [ctx.node()]) |
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280 if eol: |
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281 failed.extend(eol.checkrev(repo, ctx, files)) |
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282 |
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283 if failed: |
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284 eols = {'to-lf': 'CRLF', 'to-crlf': 'LF'} |
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285 msgs = [] |
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286 for f, target, node in sorted(failed): |
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287 msgs.append(_(" %s in %s should not have %s line endings") % |
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288 (f, node, eols[target])) |
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289 raise errormod.Abort(_("end-of-line check failed:\n") + "\n".join(msgs)) |
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290 |
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291 def checkallhook(ui, repo, node, hooktype, **kwargs): |
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292 """verify that files have expected EOLs""" |
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293 _checkhook(ui, repo, node, False) |
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294 |
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295 def checkheadshook(ui, repo, node, hooktype, **kwargs): |
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296 """verify that files have expected EOLs""" |
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297 _checkhook(ui, repo, node, True) |
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298 |
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299 # "checkheadshook" used to be called "hook" |
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300 hook = checkheadshook |
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301 |
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302 def preupdate(ui, repo, hooktype, parent1, parent2): |
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303 p1node = scmutil.resolvehexnodeidprefix(repo, parent1) |
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304 repo.loadeol([p1node]) |
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305 return False |
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306 |
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307 def uisetup(ui): |
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308 ui.setconfig('hooks', 'preupdate.eol', preupdate, 'eol') |
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309 |
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310 def extsetup(ui): |
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311 try: |
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312 extensions.find('win32text') |
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313 ui.warn(_("the eol extension is incompatible with the " |
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314 "win32text extension\n")) |
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315 except KeyError: |
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316 pass |
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317 |
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318 |
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319 def reposetup(ui, repo): |
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320 uisetup(repo.ui) |
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321 |
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322 if not repo.local(): |
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323 return |
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324 for name, fn in filters.iteritems(): |
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325 repo.adddatafilter(name, fn) |
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326 |
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327 ui.setconfig('patch', 'eol', 'auto', 'eol') |
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328 |
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329 class eolrepo(repo.__class__): |
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330 |
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331 def loadeol(self, nodes): |
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332 eol = parseeol(self.ui, self, nodes) |
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333 if eol is None: |
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334 return None |
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335 eol.copytoui(self.ui) |
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336 return eol.match |
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337 |
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338 def _hgcleardirstate(self): |
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339 self._eolmatch = self.loadeol([None, 'tip']) |
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340 if not self._eolmatch: |
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341 self._eolmatch = util.never |
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342 return |
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343 |
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344 oldeol = None |
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345 try: |
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346 cachemtime = os.path.getmtime(self.vfs.join("eol.cache")) |
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347 except OSError: |
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348 cachemtime = 0 |
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349 else: |
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350 olddata = self.vfs.read("eol.cache") |
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351 if olddata: |
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352 oldeol = eolfile(self.ui, self.root, olddata) |
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353 |
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354 try: |
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355 eolmtime = os.path.getmtime(self.wjoin(".hgeol")) |
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356 except OSError: |
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357 eolmtime = 0 |
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358 |
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359 if eolmtime > cachemtime: |
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360 self.ui.debug("eol: detected change in .hgeol\n") |
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361 |
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362 hgeoldata = self.wvfs.read('.hgeol') |
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363 neweol = eolfile(self.ui, self.root, hgeoldata) |
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364 |
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365 wlock = None |
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366 try: |
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367 wlock = self.wlock() |
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368 for f in self.dirstate: |
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369 if self.dirstate[f] != 'n': |
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370 continue |
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371 if oldeol is not None: |
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372 if not oldeol.match(f) and not neweol.match(f): |
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373 continue |
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374 oldkey = None |
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375 for pattern, key, m in oldeol.patterns: |
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376 if m(f): |
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377 oldkey = key |
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378 break |
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379 newkey = None |
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380 for pattern, key, m in neweol.patterns: |
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381 if m(f): |
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382 newkey = key |
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383 break |
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384 if oldkey == newkey: |
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385 continue |
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386 # all normal files need to be looked at again since |
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387 # the new .hgeol file specify a different filter |
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388 self.dirstate.normallookup(f) |
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389 # Write the cache to update mtime and cache .hgeol |
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390 with self.vfs("eol.cache", "w") as f: |
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391 f.write(hgeoldata) |
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392 except errormod.LockUnavailable: |
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393 # If we cannot lock the repository and clear the |
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394 # dirstate, then a commit might not see all files |
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395 # as modified. But if we cannot lock the |
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396 # repository, then we can also not make a commit, |
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397 # so ignore the error. |
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398 pass |
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399 finally: |
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400 if wlock is not None: |
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401 wlock.release() |
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402 |
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403 def commitctx(self, ctx, error=False): |
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404 for f in sorted(ctx.added() + ctx.modified()): |
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405 if not self._eolmatch(f): |
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406 continue |
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407 fctx = ctx[f] |
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408 if fctx is None: |
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409 continue |
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410 data = fctx.data() |
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411 if stringutil.binary(data): |
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412 # We should not abort here, since the user should |
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413 # be able to say "** = native" to automatically |
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414 # have all non-binary files taken care of. |
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415 continue |
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416 if inconsistenteol(data): |
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417 raise errormod.Abort(_("inconsistent newline style " |
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418 "in %s\n") % f) |
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419 return super(eolrepo, self).commitctx(ctx, error) |
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420 repo.__class__ = eolrepo |
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421 repo._hgcleardirstate() |