Mercurial > hg
annotate hgext/eol.py @ 14855:f33579435378
eol: fix missing trailing newlines in comitted files
Some text editors (Eclipse, for example) do not add trailing newlines,
so diffs often contain annoying "\ No newline at the end of file".
This patch to eol extension simply adds trailing newline on commit.
author | Stepan Koltsov <stepancheg@yandex-team.ru> |
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date | Fri, 01 Jul 2011 23:12:52 +0400 |
parents | 23c2d7d25329 |
children | 9f5cd6b6d758 |
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.checkheadshook``. The |
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77 hook will lookup the expected line endings from the ``.hgeol`` file, |
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78 which means you must migrate to a ``.hgeol`` file first before using |
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79 the hook. ``eol.checkheadshook`` only checks heads, intermediate |
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80 invalid revisions will be pushed. To forbid them completely, use the |
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81 ``eol.checkallhook`` hook. These hooks are best used as |
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82 ``pretxnchangegroup`` hooks. |
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83 |
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84 See :hg:`help patterns` for more information about the glob patterns |
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85 used. |
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86 """ |
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87 |
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88 from mercurial.i18n import _ |
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89 from mercurial import util, config, extensions, match, error |
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90 import re, os |
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91 |
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92 # Matches a lone LF, i.e., one that is not part of CRLF. |
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93 singlelf = re.compile('(^|[^\r])\n') |
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94 # Matches a single EOL which can either be a CRLF where repeated CR |
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95 # are removed or a LF. We do not care about old Machintosh files, so a |
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96 # stray CR is an error. |
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97 eolre = re.compile('\r*\n') |
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98 |
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99 |
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100 def inconsistenteol(data): |
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101 return '\r\n' in data and singlelf.search(data) |
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102 |
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103 def tolf(s, params, ui, **kwargs): |
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104 """Filter to convert to LF EOLs.""" |
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105 if util.binary(s): |
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106 return s |
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107 if ui.configbool('eol', 'only-consistent', True) and inconsistenteol(s): |
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108 return s |
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109 if ui.configbool('eol', 'fix-trailing-newline', False) and s and s[-1] != '\n': |
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110 s = s + '\n' |
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111 return eolre.sub('\n', s) |
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112 |
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113 def tocrlf(s, params, ui, **kwargs): |
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114 """Filter to convert to CRLF EOLs.""" |
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115 if util.binary(s): |
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116 return s |
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117 if ui.configbool('eol', 'only-consistent', True) and inconsistenteol(s): |
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118 return s |
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119 if ui.configbool('eol', 'fix-trailing-newline', False) and s and s[-1] != '\n': |
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120 s = s + '\n' |
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121 return eolre.sub('\r\n', s) |
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122 |
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123 def isbinary(s, params): |
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124 """Filter to do nothing with the file.""" |
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125 return s |
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126 |
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127 filters = { |
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128 'to-lf': tolf, |
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129 'to-crlf': tocrlf, |
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130 'is-binary': isbinary, |
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131 # The following provide backwards compatibility with win32text |
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132 'cleverencode:': tolf, |
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133 'cleverdecode:': tocrlf |
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134 } |
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135 |
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136 class eolfile(object): |
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137 def __init__(self, ui, root, data): |
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138 self._decode = {'LF': 'to-lf', 'CRLF': 'to-crlf', 'BIN': 'is-binary'} |
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139 self._encode = {'LF': 'to-lf', 'CRLF': 'to-crlf', 'BIN': 'is-binary'} |
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140 |
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141 self.cfg = config.config() |
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142 # Our files should not be touched. The pattern must be |
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143 # inserted first override a '** = native' pattern. |
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144 self.cfg.set('patterns', '.hg*', 'BIN') |
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145 # We can then parse the user's patterns. |
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146 self.cfg.parse('.hgeol', data) |
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147 |
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148 isrepolf = self.cfg.get('repository', 'native') != 'CRLF' |
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149 self._encode['NATIVE'] = isrepolf and 'to-lf' or 'to-crlf' |
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150 iswdlf = ui.config('eol', 'native', os.linesep) in ('LF', '\n') |
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151 self._decode['NATIVE'] = iswdlf and 'to-lf' or 'to-crlf' |
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152 |
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153 include = [] |
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154 exclude = [] |
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155 for pattern, style in self.cfg.items('patterns'): |
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156 key = style.upper() |
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157 if key == 'BIN': |
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158 exclude.append(pattern) |
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159 else: |
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160 include.append(pattern) |
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161 # This will match the files for which we need to care |
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162 # about inconsistent newlines. |
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163 self.match = match.match(root, '', [], include, exclude) |
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164 |
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165 def copytoui(self, ui): |
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166 for pattern, style in self.cfg.items('patterns'): |
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167 key = style.upper() |
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168 try: |
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169 ui.setconfig('decode', pattern, self._decode[key]) |
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170 ui.setconfig('encode', pattern, self._encode[key]) |
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171 except KeyError: |
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172 ui.warn(_("ignoring unknown EOL style '%s' from %s\n") |
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173 % (style, self.cfg.source('patterns', pattern))) |
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174 # eol.only-consistent can be specified in ~/.hgrc or .hgeol |
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175 for k, v in self.cfg.items('eol'): |
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176 ui.setconfig('eol', k, v) |
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177 |
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178 def checkrev(self, repo, ctx, files): |
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179 failed = [] |
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180 for f in (files or ctx.files()): |
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181 if f not in ctx: |
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182 continue |
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183 for pattern, style in self.cfg.items('patterns'): |
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184 if not match.match(repo.root, '', [pattern])(f): |
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185 continue |
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186 target = self._encode[style.upper()] |
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187 data = ctx[f].data() |
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188 if (target == "to-lf" and "\r\n" in data |
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189 or target == "to-crlf" and singlelf.search(data)): |
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190 failed.append((str(ctx), target, f)) |
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191 break |
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192 return failed |
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193 |
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194 def parseeol(ui, repo, nodes): |
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195 try: |
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196 for node in nodes: |
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197 try: |
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198 if node is None: |
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199 # Cannot use workingctx.data() since it would load |
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200 # and cache the filters before we configure them. |
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201 data = repo.wfile('.hgeol').read() |
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202 else: |
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203 data = repo[node]['.hgeol'].data() |
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204 return eolfile(ui, repo.root, data) |
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205 except (IOError, LookupError): |
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206 pass |
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207 except error.ParseError, inst: |
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208 ui.warn(_("warning: ignoring .hgeol file due to parse error " |
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209 "at %s: %s\n") % (inst.args[1], inst.args[0])) |
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210 return None |
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211 |
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212 def _checkhook(ui, repo, node, headsonly): |
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213 # Get revisions to check and touched files at the same time |
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214 files = set() |
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215 revs = set() |
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216 for rev in xrange(repo[node].rev(), len(repo)): |
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217 revs.add(rev) |
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218 if headsonly: |
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219 ctx = repo[rev] |
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220 files.update(ctx.files()) |
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221 for pctx in ctx.parents(): |
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222 revs.discard(pctx.rev()) |
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223 failed = [] |
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224 for rev in revs: |
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225 ctx = repo[rev] |
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226 eol = parseeol(ui, repo, [ctx.node()]) |
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227 if eol: |
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228 failed.extend(eol.checkrev(repo, ctx, files)) |
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229 |
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230 if failed: |
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231 eols = {'to-lf': 'CRLF', 'to-crlf': 'LF'} |
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232 msgs = [] |
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233 for node, target, f in failed: |
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234 msgs.append(_(" %s in %s should not have %s line endings") % |
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235 (f, node, eols[target])) |
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236 raise util.Abort(_("end-of-line check failed:\n") + "\n".join(msgs)) |
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237 |
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238 def checkallhook(ui, repo, node, hooktype, **kwargs): |
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239 """verify that files have expected EOLs""" |
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240 _checkhook(ui, repo, node, False) |
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241 |
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242 def checkheadshook(ui, repo, node, hooktype, **kwargs): |
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243 """verify that files have expected EOLs""" |
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244 _checkhook(ui, repo, node, True) |
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245 |
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246 # "checkheadshook" used to be called "hook" |
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247 hook = checkheadshook |
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248 |
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249 def preupdate(ui, repo, hooktype, parent1, parent2): |
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250 #print "preupdate for %s: %s -> %s" % (repo.root, parent1, parent2) |
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251 repo.loadeol([parent1]) |
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252 return False |
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253 |
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254 def uisetup(ui): |
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255 ui.setconfig('hooks', 'preupdate.eol', preupdate) |
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256 |
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257 def extsetup(ui): |
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258 try: |
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259 extensions.find('win32text') |
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260 ui.warn(_("the eol extension is incompatible with the " |
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261 "win32text extension\n")) |
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262 except KeyError: |
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263 pass |
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264 |
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265 |
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266 def reposetup(ui, repo): |
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267 uisetup(repo.ui) |
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268 #print "reposetup for", repo.root |
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269 |
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270 if not repo.local(): |
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271 return |
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272 for name, fn in filters.iteritems(): |
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273 repo.adddatafilter(name, fn) |
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274 |
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275 ui.setconfig('patch', 'eol', 'auto') |
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276 |
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277 class eolrepo(repo.__class__): |
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278 |
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279 def loadeol(self, nodes): |
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280 eol = parseeol(self.ui, self, nodes) |
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281 if eol is None: |
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282 return None |
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283 eol.copytoui(self.ui) |
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284 return eol.match |
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285 |
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286 def _hgcleardirstate(self): |
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287 self._eolfile = self.loadeol([None, 'tip']) |
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288 if not self._eolfile: |
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289 self._eolfile = util.never |
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290 return |
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291 |
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292 try: |
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293 cachemtime = os.path.getmtime(self.join("eol.cache")) |
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294 except OSError: |
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295 cachemtime = 0 |
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296 |
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297 try: |
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298 eolmtime = os.path.getmtime(self.wjoin(".hgeol")) |
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299 except OSError: |
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300 eolmtime = 0 |
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301 |
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302 if eolmtime > cachemtime: |
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303 ui.debug("eol: detected change in .hgeol\n") |
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304 wlock = None |
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305 try: |
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306 wlock = self.wlock() |
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307 for f in self.dirstate: |
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308 if self.dirstate[f] == 'n': |
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309 # all normal files need to be looked at |
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310 # again since the new .hgeol file might no |
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311 # longer match a file it matched before |
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312 self.dirstate.normallookup(f) |
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313 # Touch the cache to update mtime. |
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314 self.opener("eol.cache", "w").close() |
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315 wlock.release() |
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316 except error.LockUnavailable: |
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317 # If we cannot lock the repository and clear the |
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318 # dirstate, then a commit might not see all files |
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319 # as modified. But if we cannot lock the |
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320 # repository, then we can also not make a commit, |
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321 # so ignore the error. |
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322 pass |
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323 |
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324 def commitctx(self, ctx, error=False): |
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325 for f in sorted(ctx.added() + ctx.modified()): |
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326 if not self._eolfile(f): |
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327 continue |
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328 data = ctx[f].data() |
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329 if util.binary(data): |
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330 # We should not abort here, since the user should |
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331 # be able to say "** = native" to automatically |
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332 # have all non-binary files taken care of. |
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333 continue |
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334 if inconsistenteol(data): |
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335 raise util.Abort(_("inconsistent newline style " |
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336 "in %s\n" % f)) |
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337 return super(eolrepo, self).commitctx(ctx, error) |
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338 repo.__class__ = eolrepo |
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339 repo._hgcleardirstate() |