Mercurial > hg
annotate hgext/eol.py @ 13616:e6f93ca9ce86
eol: make the hook check all new heads, not only tip (issue2666)
Report and test by Antoine Pitrou <solipsis@pitrou.net>
author | Patrick Mezard <pmezard@gmail.com> |
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date | Sun, 13 Mar 2011 15:07:44 +0100 |
parents | 686dec753b52 |
children | 9cb1a42cd4b3 |
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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 # Extract heads and get touched files set at the same time |
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206 files = set() |
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207 heads = set() |
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208 for rev in xrange(repo[node].rev(), len(repo)): |
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209 ctx = repo[rev] |
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210 files.update(ctx.files()) |
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211 heads.add(rev) |
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212 for pctx in ctx.parents(): |
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213 heads.discard(pctx.rev()) |
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214 for rev in heads: |
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215 ctx = repo[rev] |
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216 eol = parseeol(ui, repo, [ctx.node()]) |
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217 if eol: |
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218 eol.checkrev(repo, ctx, files) |
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219 |
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220 def preupdate(ui, repo, hooktype, parent1, parent2): |
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221 #print "preupdate for %s: %s -> %s" % (repo.root, parent1, parent2) |
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222 repo.loadeol([parent1]) |
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223 return False |
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224 |
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225 def uisetup(ui): |
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226 ui.setconfig('hooks', 'preupdate.eol', preupdate) |
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227 |
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228 def extsetup(ui): |
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229 try: |
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230 extensions.find('win32text') |
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231 raise util.Abort(_("the eol extension is incompatible with the " |
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232 "win32text extension")) |
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233 except KeyError: |
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234 pass |
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235 |
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236 |
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237 def reposetup(ui, repo): |
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238 uisetup(repo.ui) |
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239 #print "reposetup for", repo.root |
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240 |
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241 if not repo.local(): |
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242 return |
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243 for name, fn in filters.iteritems(): |
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244 repo.adddatafilter(name, fn) |
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245 |
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246 ui.setconfig('patch', 'eol', 'auto') |
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247 |
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248 class eolrepo(repo.__class__): |
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249 |
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250 def loadeol(self, nodes): |
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251 eol = parseeol(self.ui, self, nodes) |
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252 if eol is None: |
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253 return None |
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254 eol.setfilters(self.ui) |
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255 return eol.match |
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256 |
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257 def _hgcleardirstate(self): |
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258 self._eolfile = self.loadeol([None, 'tip']) |
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259 if not self._eolfile: |
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260 self._eolfile = util.never |
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261 return |
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262 |
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263 try: |
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264 cachemtime = os.path.getmtime(self.join("eol.cache")) |
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265 except OSError: |
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266 cachemtime = 0 |
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267 |
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268 try: |
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269 eolmtime = os.path.getmtime(self.wjoin(".hgeol")) |
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270 except OSError: |
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271 eolmtime = 0 |
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272 |
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273 if eolmtime > cachemtime: |
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274 ui.debug("eol: detected change in .hgeol\n") |
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275 wlock = None |
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276 try: |
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277 wlock = self.wlock() |
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278 for f in self.dirstate: |
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279 if self.dirstate[f] == 'n': |
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280 # all normal files need to be looked at |
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281 # again since the new .hgeol file might no |
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282 # longer match a file it matched before |
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283 self.dirstate.normallookup(f) |
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284 # Touch the cache to update mtime. |
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285 self.opener("eol.cache", "w").close() |
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286 wlock.release() |
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287 except error.LockUnavailable: |
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288 # If we cannot lock the repository and clear the |
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289 # dirstate, then a commit might not see all files |
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290 # as modified. But if we cannot lock the |
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291 # repository, then we can also not make a commit, |
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292 # so ignore the error. |
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293 pass |
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294 |
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295 def commitctx(self, ctx, error=False): |
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296 for f in sorted(ctx.added() + ctx.modified()): |
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297 if not self._eolfile(f): |
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298 continue |
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299 data = ctx[f].data() |
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300 if util.binary(data): |
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301 # We should not abort here, since the user should |
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302 # be able to say "** = native" to automatically |
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303 # have all non-binary files taken care of. |
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304 continue |
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305 if inconsistenteol(data): |
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306 raise util.Abort(_("inconsistent newline style " |
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307 "in %s\n" % f)) |
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308 return super(eolrepo, self).commitctx(ctx, error) |
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309 repo.__class__ = eolrepo |
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310 repo._hgcleardirstate() |