Mercurial > hg
annotate hgext/eol.py @ 13615:686dec753b52
eol: the hook no longer requires the extension to be loaded
Reading rules in the hook means we no longer need ui to be filled and do not
need reposetup() to be run anymore.
author | Patrick Mezard <pmezard@gmail.com> |
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date | Sun, 13 Mar 2011 15:07:44 +0100 |
parents | 40d0cf79cb2c |
children | e6f93ca9ce86 |
rev | line source |
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eol: extension for managing file EOLs
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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 in your hgrc file |
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56 (not the ``.hgeol`` file) for settings that control the overall |
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57 behavior. There are two settings: |
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58 |
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59 - ``eol.native`` (default ``os.linesep``) can be set to ``LF`` or |
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60 ``CRLF`` to override the default interpretation of ``native`` for |
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61 checkout. This can be used with :hg:`archive` on Unix, say, to |
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62 generate an archive where files have line endings for Windows. |
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63 |
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64 - ``eol.only-consistent`` (default True) can be set to False to make |
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65 the extension convert files with inconsistent EOLs. Inconsistent |
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66 means that there is both ``CRLF`` and ``LF`` present in the file. |
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67 Such files are normally not touched under the assumption that they |
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68 have mixed EOLs on purpose. |
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69 |
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70 The extension provides ``cleverencode:`` and ``cleverdecode:`` filters |
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71 like the deprecated win32text extension does. This means that you can |
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72 disable win32text and enable eol and your filters will still work. You |
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73 only need to these filters until you have prepared a ``.hgeol`` file. |
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74 |
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75 The ``win32text.forbid*`` hooks provided by the win32text extension |
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76 have been unified into a single hook named ``eol.hook``. The hook will |
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77 lookup the expected line endings from the ``.hgeol`` file, which means |
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78 you must migrate to a ``.hgeol`` file first before using the hook. |
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79 |
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80 See :hg:`help patterns` for more information about the glob patterns |
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81 used. |
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82 """ |
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83 |
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84 from mercurial.i18n import _ |
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85 from mercurial import util, config, extensions, match, error |
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86 import re, os |
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87 |
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88 # Matches a lone LF, i.e., one that is not part of CRLF. |
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89 singlelf = re.compile('(^|[^\r])\n') |
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90 # Matches a single EOL which can either be a CRLF where repeated CR |
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91 # are removed or a LF. We do not care about old Machintosh files, so a |
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92 # stray CR is an error. |
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93 eolre = re.compile('\r*\n') |
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94 |
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95 |
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96 def inconsistenteol(data): |
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97 return '\r\n' in data and singlelf.search(data) |
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98 |
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99 def tolf(s, params, ui, **kwargs): |
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100 """Filter to convert to LF EOLs.""" |
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101 if util.binary(s): |
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102 return s |
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103 if ui.configbool('eol', 'only-consistent', True) and inconsistenteol(s): |
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104 return s |
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105 return eolre.sub('\n', s) |
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106 |
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107 def tocrlf(s, params, ui, **kwargs): |
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108 """Filter to convert to CRLF EOLs.""" |
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109 if util.binary(s): |
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110 return s |
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111 if ui.configbool('eol', 'only-consistent', True) and inconsistenteol(s): |
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112 return s |
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113 return eolre.sub('\r\n', s) |
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114 |
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115 def isbinary(s, params): |
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116 """Filter to do nothing with the file.""" |
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117 return s |
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118 |
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119 filters = { |
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120 'to-lf': tolf, |
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121 'to-crlf': tocrlf, |
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122 'is-binary': isbinary, |
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123 # The following provide backwards compatibility with win32text |
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124 'cleverencode:': tolf, |
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125 'cleverdecode:': tocrlf |
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126 } |
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127 |
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128 class eolfile(object): |
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129 def __init__(self, ui, root, data): |
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130 self._decode = {'LF': 'to-lf', 'CRLF': 'to-crlf', 'BIN': 'is-binary'} |
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131 self._encode = {'LF': 'to-lf', 'CRLF': 'to-crlf', 'BIN': 'is-binary'} |
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132 |
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133 self.cfg = config.config() |
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134 # Our files should not be touched. The pattern must be |
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135 # inserted first override a '** = native' pattern. |
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136 self.cfg.set('patterns', '.hg*', 'BIN') |
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137 # We can then parse the user's patterns. |
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138 self.cfg.parse('.hgeol', data) |
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139 |
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140 isrepolf = self.cfg.get('repository', 'native') != 'CRLF' |
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141 self._encode['NATIVE'] = isrepolf and 'to-lf' or 'to-crlf' |
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142 iswdlf = ui.config('eol', 'native', os.linesep) in ('LF', '\n') |
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143 self._decode['NATIVE'] = iswdlf and 'to-lf' or 'to-crlf' |
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144 |
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145 include = [] |
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146 exclude = [] |
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147 for pattern, style in self.cfg.items('patterns'): |
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148 key = style.upper() |
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149 if key == 'BIN': |
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150 exclude.append(pattern) |
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151 else: |
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152 include.append(pattern) |
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153 # This will match the files for which we need to care |
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154 # about inconsistent newlines. |
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155 self.match = match.match(root, '', [], include, exclude) |
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156 |
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157 def setfilters(self, ui): |
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158 for pattern, style in self.cfg.items('patterns'): |
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159 key = style.upper() |
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160 try: |
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161 ui.setconfig('decode', pattern, self._decode[key]) |
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162 ui.setconfig('encode', pattern, self._encode[key]) |
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163 except KeyError: |
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164 ui.warn(_("ignoring unknown EOL style '%s' from %s\n") |
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165 % (style, self.cfg.source('patterns', pattern))) |
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166 |
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167 def checkrev(self, repo, ctx, files): |
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168 for f in files: |
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169 if f not in ctx: |
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170 continue |
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171 for pattern, style in self.cfg.items('patterns'): |
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172 if not match.match(repo.root, '', [pattern])(f): |
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173 continue |
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174 target = self._encode[style.upper()] |
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175 data = ctx[f].data() |
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176 if target == "to-lf" and "\r\n" in data: |
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177 raise util.Abort(_("%s should not have CRLF line endings") |
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178 % f) |
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179 elif target == "to-crlf" and singlelf.search(data): |
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180 raise util.Abort(_("%s should not have LF line endings") |
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181 % f) |
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182 # Ignore other rules for this file |
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183 break |
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184 |
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185 def parseeol(ui, repo, nodes): |
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186 try: |
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187 for node in nodes: |
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188 try: |
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189 if node is None: |
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190 # Cannot use workingctx.data() since it would load |
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191 # and cache the filters before we configure them. |
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192 data = repo.wfile('.hgeol').read() |
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193 else: |
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194 data = repo[node]['.hgeol'].data() |
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195 return eolfile(ui, repo.root, data) |
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196 except (IOError, LookupError): |
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197 pass |
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198 except error.ParseError, inst: |
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199 ui.warn(_("warning: ignoring .hgeol file due to parse error " |
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200 "at %s: %s\n") % (inst.args[1], inst.args[0])) |
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201 return None |
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202 |
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203 def hook(ui, repo, node, hooktype, **kwargs): |
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204 """verify that files have expected EOLs""" |
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205 files = set() |
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206 for rev in xrange(repo[node].rev(), len(repo)): |
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207 files.update(repo[rev].files()) |
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208 tip = repo['tip'] |
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209 eol = parseeol(ui, repo, [tip.node()]) |
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210 if eol: |
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211 eol.checkrev(repo, tip, files) |
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212 |
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213 def preupdate(ui, repo, hooktype, parent1, parent2): |
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214 #print "preupdate for %s: %s -> %s" % (repo.root, parent1, parent2) |
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215 repo.loadeol([parent1]) |
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216 return False |
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217 |
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218 def uisetup(ui): |
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219 ui.setconfig('hooks', 'preupdate.eol', preupdate) |
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220 |
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221 def extsetup(ui): |
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222 try: |
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223 extensions.find('win32text') |
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224 raise util.Abort(_("the eol extension is incompatible with the " |
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225 "win32text extension")) |
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226 except KeyError: |
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227 pass |
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228 |
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229 |
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230 def reposetup(ui, repo): |
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231 uisetup(repo.ui) |
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232 #print "reposetup for", repo.root |
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233 |
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234 if not repo.local(): |
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235 return |
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236 for name, fn in filters.iteritems(): |
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237 repo.adddatafilter(name, fn) |
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238 |
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239 ui.setconfig('patch', 'eol', 'auto') |
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240 |
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241 class eolrepo(repo.__class__): |
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242 |
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243 def loadeol(self, nodes): |
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244 eol = parseeol(self.ui, self, nodes) |
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245 if eol is None: |
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246 return None |
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247 eol.setfilters(self.ui) |
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248 return eol.match |
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249 |
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250 def _hgcleardirstate(self): |
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251 self._eolfile = self.loadeol([None, 'tip']) |
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252 if not self._eolfile: |
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253 self._eolfile = util.never |
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254 return |
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255 |
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256 try: |
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257 cachemtime = os.path.getmtime(self.join("eol.cache")) |
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258 except OSError: |
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259 cachemtime = 0 |
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260 |
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261 try: |
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262 eolmtime = os.path.getmtime(self.wjoin(".hgeol")) |
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263 except OSError: |
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264 eolmtime = 0 |
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265 |
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266 if eolmtime > cachemtime: |
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267 ui.debug("eol: detected change in .hgeol\n") |
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268 wlock = None |
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269 try: |
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270 wlock = self.wlock() |
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271 for f in self.dirstate: |
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272 if self.dirstate[f] == 'n': |
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273 # all normal files need to be looked at |
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274 # again since the new .hgeol file might no |
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275 # longer match a file it matched before |
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276 self.dirstate.normallookup(f) |
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277 # Touch the cache to update mtime. |
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278 self.opener("eol.cache", "w").close() |
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279 wlock.release() |
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280 except error.LockUnavailable: |
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281 # If we cannot lock the repository and clear the |
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282 # dirstate, then a commit might not see all files |
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283 # as modified. But if we cannot lock the |
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284 # repository, then we can also not make a commit, |
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285 # so ignore the error. |
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286 pass |
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287 |
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288 def commitctx(self, ctx, error=False): |
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289 for f in sorted(ctx.added() + ctx.modified()): |
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290 if not self._eolfile(f): |
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291 continue |
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292 data = ctx[f].data() |
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293 if util.binary(data): |
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294 # We should not abort here, since the user should |
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295 # be able to say "** = native" to automatically |
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296 # have all non-binary files taken care of. |
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297 continue |
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298 if inconsistenteol(data): |
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299 raise util.Abort(_("inconsistent newline style " |
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300 "in %s\n" % f)) |
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301 return super(eolrepo, self).commitctx(ctx, error) |
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302 repo.__class__ = eolrepo |
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303 repo._hgcleardirstate() |