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annotate hgext/eol.py @ 17208:8018f2340807
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author | Pierre-Yves.David@ens-lyon.org |
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date | Mon, 16 Jul 2012 17:56:50 +0200 |
parents | 38caf405d010 |
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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 copy. 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 copy 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 |
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26 default behaviour; 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 The rules will first apply when files are touched in the working |
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53 copy, e.g. by updating to null and back to tip to touch all files. |
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54 |
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55 The extension uses an optional ``[eol]`` section read from both the |
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56 normal Mercurial configuration files and the ``.hgeol`` file, with the |
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57 latter overriding the former. You can use that section to control the |
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58 overall behavior. There are three settings: |
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59 |
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60 - ``eol.native`` (default ``os.linesep``) can be set to ``LF`` or |
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61 ``CRLF`` to override the default interpretation of ``native`` for |
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62 checkout. This can be used with :hg:`archive` on Unix, say, to |
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63 generate an archive where files have line endings for Windows. |
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64 |
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65 - ``eol.only-consistent`` (default True) can be set to False to make |
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66 the extension convert files with inconsistent EOLs. Inconsistent |
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67 means that there is both ``CRLF`` and ``LF`` present in the file. |
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68 Such files are normally not touched under the assumption that they |
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69 have mixed EOLs on purpose. |
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70 |
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71 - ``eol.fix-trailing-newline`` (default False) can be set to True to |
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72 ensure that converted files end with a EOL character (either ``\\n`` |
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73 or ``\\r\\n`` as per the configured patterns). |
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74 |
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75 The extension provides ``cleverencode:`` and ``cleverdecode:`` filters |
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76 like the deprecated win32text extension does. This means that you can |
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77 disable win32text and enable eol and your filters will still work. You |
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78 only need to these filters until you have prepared a ``.hgeol`` file. |
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79 |
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80 The ``win32text.forbid*`` hooks provided by the win32text extension |
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81 have been unified into a single hook named ``eol.checkheadshook``. The |
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82 hook will lookup the expected line endings from the ``.hgeol`` file, |
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83 which means you must migrate to a ``.hgeol`` file first before using |
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84 the hook. ``eol.checkheadshook`` only checks heads, intermediate |
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85 invalid revisions will be pushed. To forbid them completely, use the |
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86 ``eol.checkallhook`` hook. These hooks are best used as |
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87 ``pretxnchangegroup`` hooks. |
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88 |
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89 See :hg:`help patterns` for more information about the glob patterns |
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90 used. |
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91 """ |
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92 |
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93 from mercurial.i18n import _ |
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94 from mercurial import util, config, extensions, match, error |
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95 import re, os |
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96 |
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97 testedwith = 'internal' |
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98 |
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99 # Matches a lone LF, i.e., one that is not part of CRLF. |
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100 singlelf = re.compile('(^|[^\r])\n') |
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101 # Matches a single EOL which can either be a CRLF where repeated CR |
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102 # are removed or a LF. We do not care about old Machintosh files, so a |
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103 # stray CR is an error. |
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104 eolre = re.compile('\r*\n') |
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105 |
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106 |
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107 def inconsistenteol(data): |
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108 return '\r\n' in data and singlelf.search(data) |
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109 |
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110 def tolf(s, params, ui, **kwargs): |
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111 """Filter to convert to LF EOLs.""" |
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112 if util.binary(s): |
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113 return s |
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114 if ui.configbool('eol', 'only-consistent', True) and inconsistenteol(s): |
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115 return s |
16683 | 116 if (ui.configbool('eol', 'fix-trailing-newline', False) |
117 and s and s[-1] != '\n'): | |
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118 s = s + '\n' |
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119 return eolre.sub('\n', s) |
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120 |
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121 def tocrlf(s, params, ui, **kwargs): |
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122 """Filter to convert to CRLF EOLs.""" |
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123 if util.binary(s): |
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124 return s |
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125 if ui.configbool('eol', 'only-consistent', True) and inconsistenteol(s): |
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126 return s |
16683 | 127 if (ui.configbool('eol', 'fix-trailing-newline', False) |
128 and s and s[-1] != '\n'): | |
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129 s = s + '\n' |
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130 return eolre.sub('\r\n', s) |
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131 |
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132 def isbinary(s, params): |
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133 """Filter to do nothing with the file.""" |
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134 return s |
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135 |
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136 filters = { |
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137 'to-lf': tolf, |
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138 'to-crlf': tocrlf, |
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139 'is-binary': isbinary, |
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140 # The following provide backwards compatibility with win32text |
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141 'cleverencode:': tolf, |
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142 'cleverdecode:': tocrlf |
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143 } |
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144 |
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145 class eolfile(object): |
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146 def __init__(self, ui, root, data): |
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147 self._decode = {'LF': 'to-lf', 'CRLF': 'to-crlf', 'BIN': 'is-binary'} |
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148 self._encode = {'LF': 'to-lf', 'CRLF': 'to-crlf', 'BIN': 'is-binary'} |
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149 |
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150 self.cfg = config.config() |
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151 # Our files should not be touched. The pattern must be |
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152 # inserted first override a '** = native' pattern. |
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153 self.cfg.set('patterns', '.hg*', 'BIN') |
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154 # We can then parse the user's patterns. |
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155 self.cfg.parse('.hgeol', data) |
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156 |
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157 isrepolf = self.cfg.get('repository', 'native') != 'CRLF' |
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158 self._encode['NATIVE'] = isrepolf and 'to-lf' or 'to-crlf' |
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159 iswdlf = ui.config('eol', 'native', os.linesep) in ('LF', '\n') |
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160 self._decode['NATIVE'] = iswdlf and 'to-lf' or 'to-crlf' |
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161 |
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162 include = [] |
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163 exclude = [] |
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164 for pattern, style in self.cfg.items('patterns'): |
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165 key = style.upper() |
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166 if key == 'BIN': |
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167 exclude.append(pattern) |
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168 else: |
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169 include.append(pattern) |
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170 # This will match the files for which we need to care |
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171 # about inconsistent newlines. |
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172 self.match = match.match(root, '', [], include, exclude) |
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173 |
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174 def copytoui(self, ui): |
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175 for pattern, style in self.cfg.items('patterns'): |
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176 key = style.upper() |
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177 try: |
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178 ui.setconfig('decode', pattern, self._decode[key]) |
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179 ui.setconfig('encode', pattern, self._encode[key]) |
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180 except KeyError: |
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181 ui.warn(_("ignoring unknown EOL style '%s' from %s\n") |
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182 % (style, self.cfg.source('patterns', pattern))) |
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183 # eol.only-consistent can be specified in ~/.hgrc or .hgeol |
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184 for k, v in self.cfg.items('eol'): |
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185 ui.setconfig('eol', k, v) |
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186 |
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187 def checkrev(self, repo, ctx, files): |
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188 failed = [] |
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189 for f in (files or ctx.files()): |
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190 if f not in ctx: |
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191 continue |
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192 for pattern, style in self.cfg.items('patterns'): |
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193 if not match.match(repo.root, '', [pattern])(f): |
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194 continue |
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195 target = self._encode[style.upper()] |
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196 data = ctx[f].data() |
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197 if (target == "to-lf" and "\r\n" in data |
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198 or target == "to-crlf" and singlelf.search(data)): |
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199 failed.append((str(ctx), target, f)) |
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200 break |
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201 return failed |
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202 |
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203 def parseeol(ui, repo, nodes): |
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204 try: |
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205 for node in nodes: |
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206 try: |
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207 if node is None: |
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208 # Cannot use workingctx.data() since it would load |
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209 # and cache the filters before we configure them. |
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210 data = repo.wfile('.hgeol').read() |
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211 else: |
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212 data = repo[node]['.hgeol'].data() |
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213 return eolfile(ui, repo.root, data) |
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214 except (IOError, LookupError): |
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215 pass |
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216 except error.ParseError, inst: |
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217 ui.warn(_("warning: ignoring .hgeol file due to parse error " |
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218 "at %s: %s\n") % (inst.args[1], inst.args[0])) |
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219 return None |
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220 |
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221 def _checkhook(ui, repo, node, headsonly): |
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222 # Get revisions to check and touched files at the same time |
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223 files = set() |
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224 revs = set() |
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225 for rev in xrange(repo[node].rev(), len(repo)): |
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226 revs.add(rev) |
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227 if headsonly: |
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228 ctx = repo[rev] |
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229 files.update(ctx.files()) |
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230 for pctx in ctx.parents(): |
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231 revs.discard(pctx.rev()) |
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232 failed = [] |
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233 for rev in revs: |
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234 ctx = repo[rev] |
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235 eol = parseeol(ui, repo, [ctx.node()]) |
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236 if eol: |
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237 failed.extend(eol.checkrev(repo, ctx, files)) |
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238 |
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239 if failed: |
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240 eols = {'to-lf': 'CRLF', 'to-crlf': 'LF'} |
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241 msgs = [] |
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242 for node, target, f in failed: |
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243 msgs.append(_(" %s in %s should not have %s line endings") % |
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244 (f, node, eols[target])) |
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245 raise util.Abort(_("end-of-line check failed:\n") + "\n".join(msgs)) |
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246 |
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247 def checkallhook(ui, repo, node, hooktype, **kwargs): |
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248 """verify that files have expected EOLs""" |
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249 _checkhook(ui, repo, node, False) |
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250 |
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251 def checkheadshook(ui, repo, node, hooktype, **kwargs): |
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252 """verify that files have expected EOLs""" |
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253 _checkhook(ui, repo, node, True) |
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254 |
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255 # "checkheadshook" used to be called "hook" |
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256 hook = checkheadshook |
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257 |
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258 def preupdate(ui, repo, hooktype, parent1, parent2): |
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259 repo.loadeol([parent1]) |
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260 return False |
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261 |
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262 def uisetup(ui): |
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263 ui.setconfig('hooks', 'preupdate.eol', preupdate) |
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264 |
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265 def extsetup(ui): |
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266 try: |
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267 extensions.find('win32text') |
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268 ui.warn(_("the eol extension is incompatible with the " |
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269 "win32text extension\n")) |
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270 except KeyError: |
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271 pass |
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272 |
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273 |
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274 def reposetup(ui, repo): |
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275 uisetup(repo.ui) |
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276 |
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277 if not repo.local(): |
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278 return |
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279 for name, fn in filters.iteritems(): |
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280 repo.adddatafilter(name, fn) |
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281 |
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282 ui.setconfig('patch', 'eol', 'auto') |
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283 |
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284 class eolrepo(repo.__class__): |
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285 |
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286 def loadeol(self, nodes): |
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287 eol = parseeol(self.ui, self, nodes) |
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288 if eol is None: |
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289 return None |
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290 eol.copytoui(self.ui) |
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291 return eol.match |
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292 |
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293 def _hgcleardirstate(self): |
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294 self._eolfile = self.loadeol([None, 'tip']) |
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295 if not self._eolfile: |
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296 self._eolfile = util.never |
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297 return |
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298 |
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299 try: |
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300 cachemtime = os.path.getmtime(self.join("eol.cache")) |
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301 except OSError: |
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302 cachemtime = 0 |
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|
303 |
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304 try: |
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305 eolmtime = os.path.getmtime(self.wjoin(".hgeol")) |
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306 except OSError: |
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307 eolmtime = 0 |
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308 |
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309 if eolmtime > cachemtime: |
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310 ui.debug("eol: detected change in .hgeol\n") |
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311 wlock = None |
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312 try: |
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313 wlock = self.wlock() |
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314 for f in self.dirstate: |
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315 if self.dirstate[f] == 'n': |
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316 # all normal files need to be looked at |
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317 # again since the new .hgeol file might no |
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318 # longer match a file it matched before |
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319 self.dirstate.normallookup(f) |
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320 # Create or touch the cache to update mtime |
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321 self.opener("eol.cache", "w").close() |
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322 wlock.release() |
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323 except error.LockUnavailable: |
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324 # If we cannot lock the repository and clear the |
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325 # dirstate, then a commit might not see all files |
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326 # as modified. But if we cannot lock the |
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327 # repository, then we can also not make a commit, |
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328 # so ignore the error. |
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329 pass |
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330 |
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331 def commitctx(self, ctx, error=False): |
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332 for f in sorted(ctx.added() + ctx.modified()): |
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333 if not self._eolfile(f): |
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|
334 continue |
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|
335 try: |
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|
336 data = ctx[f].data() |
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337 except IOError: |
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|
338 continue |
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339 if util.binary(data): |
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|
340 # We should not abort here, since the user should |
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341 # be able to say "** = native" to automatically |
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342 # have all non-binary files taken care of. |
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343 continue |
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|
344 if inconsistenteol(data): |
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345 raise util.Abort(_("inconsistent newline style " |
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|
346 "in %s\n" % f)) |
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347 return super(eolrepo, self).commitctx(ctx, error) |
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348 repo.__class__ = eolrepo |
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|
349 repo._hgcleardirstate() |