Mercurial > hg
annotate hgext/eol.py @ 13502:c0f252757b41 stable
eol: be explicit about how to enable hook (issue2661)
author | Martin Geisler <mg@aragost.com> |
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date | Mon, 28 Feb 2011 09:28:18 +0100 |
parents | 50b825c1adb1 |
children | 9b617c56eb65 |
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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 Remember to enable the eol extension in the repository where you |
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80 install the hook. |
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81 |
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82 See :hg:`help patterns` for more information about the glob patterns |
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83 used. |
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84 """ |
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85 |
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86 from mercurial.i18n import _ |
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87 from mercurial import util, config, extensions, match, error |
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88 import re, os |
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89 |
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90 # Matches a lone LF, i.e., one that is not part of CRLF. |
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91 singlelf = re.compile('(^|[^\r])\n') |
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92 # Matches a single EOL which can either be a CRLF where repeated CR |
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93 # are removed or a LF. We do not care about old Machintosh files, so a |
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94 # stray CR is an error. |
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95 eolre = re.compile('\r*\n') |
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96 |
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97 |
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98 def inconsistenteol(data): |
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99 return '\r\n' in data and singlelf.search(data) |
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100 |
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101 def tolf(s, params, ui, **kwargs): |
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102 """Filter to convert to LF EOLs.""" |
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103 if util.binary(s): |
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104 return s |
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105 if ui.configbool('eol', 'only-consistent', True) and inconsistenteol(s): |
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106 return s |
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107 return eolre.sub('\n', s) |
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108 |
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109 def tocrlf(s, params, ui, **kwargs): |
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110 """Filter to convert to CRLF EOLs.""" |
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111 if util.binary(s): |
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112 return s |
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113 if ui.configbool('eol', 'only-consistent', True) and inconsistenteol(s): |
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114 return s |
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115 return eolre.sub('\r\n', s) |
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116 |
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117 def isbinary(s, params): |
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118 """Filter to do nothing with the file.""" |
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119 return s |
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120 |
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121 filters = { |
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122 'to-lf': tolf, |
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123 'to-crlf': tocrlf, |
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124 'is-binary': isbinary, |
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125 # The following provide backwards compatibility with win32text |
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126 'cleverencode:': tolf, |
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127 'cleverdecode:': tocrlf |
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128 } |
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129 |
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130 |
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131 def hook(ui, repo, node, hooktype, **kwargs): |
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132 """verify that files have expected EOLs""" |
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133 files = set() |
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134 for rev in xrange(repo[node].rev(), len(repo)): |
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135 files.update(repo[rev].files()) |
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136 tip = repo['tip'] |
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137 for f in files: |
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138 if f not in tip: |
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139 continue |
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140 for pattern, target in ui.configitems('encode'): |
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141 if match.match(repo.root, '', [pattern])(f): |
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142 data = tip[f].data() |
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143 if target == "to-lf" and "\r\n" in data: |
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144 raise util.Abort(_("%s should not have CRLF line endings") |
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145 % f) |
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146 elif target == "to-crlf" and singlelf.search(data): |
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147 raise util.Abort(_("%s should not have LF line endings") |
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148 % f) |
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149 # Ignore other rules for this file |
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150 break |
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151 |
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152 |
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153 def preupdate(ui, repo, hooktype, parent1, parent2): |
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154 #print "preupdate for %s: %s -> %s" % (repo.root, parent1, parent2) |
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155 repo.readhgeol(parent1) |
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156 return False |
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157 |
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158 def uisetup(ui): |
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159 ui.setconfig('hooks', 'preupdate.eol', preupdate) |
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160 |
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161 def extsetup(ui): |
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162 try: |
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163 extensions.find('win32text') |
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164 raise util.Abort(_("the eol extension is incompatible with the " |
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165 "win32text extension")) |
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166 except KeyError: |
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167 pass |
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168 |
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169 |
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170 def reposetup(ui, repo): |
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171 uisetup(repo.ui) |
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172 #print "reposetup for", repo.root |
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173 |
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174 if not repo.local(): |
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175 return |
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176 for name, fn in filters.iteritems(): |
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177 repo.adddatafilter(name, fn) |
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178 |
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179 ui.setconfig('patch', 'eol', 'auto') |
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180 |
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181 class eolrepo(repo.__class__): |
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182 |
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183 _decode = {'LF': 'to-lf', 'CRLF': 'to-crlf', 'BIN': 'is-binary'} |
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184 _encode = {'LF': 'to-lf', 'CRLF': 'to-crlf', 'BIN': 'is-binary'} |
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185 |
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186 def readhgeol(self, node=None, data=None): |
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187 if data is None: |
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188 try: |
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189 if node is None: |
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190 data = self.wfile('.hgeol').read() |
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191 else: |
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192 data = self[node]['.hgeol'].data() |
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193 except (IOError, LookupError): |
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194 return None |
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195 |
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196 if self.ui.config('eol', 'native', os.linesep) in ('LF', '\n'): |
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197 self._decode['NATIVE'] = 'to-lf' |
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198 else: |
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199 self._decode['NATIVE'] = 'to-crlf' |
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|
200 |
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|
201 eol = config.config() |
12974
75e4fade4ad9
eol: exclude .hgtags file from eol translation (issue2493)
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diff
changeset
|
202 # Our files should not be touched. The pattern must be |
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12802
diff
changeset
|
203 # inserted first override a '** = native' pattern. |
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12802
diff
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|
204 eol.set('patterns', '.hg*', 'BIN') |
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|
205 # We can then parse the user's patterns. |
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|
206 eol.parse('.hgeol', data) |
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|
207 |
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208 if eol.get('repository', 'native') == 'CRLF': |
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209 self._encode['NATIVE'] = 'to-crlf' |
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210 else: |
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|
211 self._encode['NATIVE'] = 'to-lf' |
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diff
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|
212 |
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|
213 for pattern, style in eol.items('patterns'): |
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diff
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|
214 key = style.upper() |
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|
215 try: |
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diff
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|
216 self.ui.setconfig('decode', pattern, self._decode[key]) |
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|
217 self.ui.setconfig('encode', pattern, self._encode[key]) |
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|
218 except KeyError: |
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|
219 self.ui.warn(_("ignoring unknown EOL style '%s' from %s\n") |
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|
220 % (style, eol.source('patterns', pattern))) |
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|
221 |
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|
222 include = [] |
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diff
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|
223 exclude = [] |
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|
224 for pattern, style in eol.items('patterns'): |
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|
225 key = style.upper() |
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|
226 if key == 'BIN': |
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|
227 exclude.append(pattern) |
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|
228 else: |
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|
229 include.append(pattern) |
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|
230 |
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|
231 # This will match the files for which we need to care |
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|
232 # about inconsistent newlines. |
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|
233 return match.match(self.root, '', [], include, exclude) |
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diff
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|
234 |
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|
235 def _hgcleardirstate(self): |
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parents:
diff
changeset
|
236 self._eolfile = self.readhgeol() or self.readhgeol('tip') |
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diff
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|
237 |
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diff
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|
238 if not self._eolfile: |
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diff
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|
239 self._eolfile = util.never |
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parents:
diff
changeset
|
240 return |
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parents:
diff
changeset
|
241 |
0bb67503ad4b
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parents:
diff
changeset
|
242 try: |
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diff
changeset
|
243 cachemtime = os.path.getmtime(self.join("eol.cache")) |
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diff
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|
244 except OSError: |
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parents:
diff
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|
245 cachemtime = 0 |
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parents:
diff
changeset
|
246 |
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Martin Geisler <mg@lazybytes.net>
parents:
diff
changeset
|
247 try: |
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diff
changeset
|
248 eolmtime = os.path.getmtime(self.wjoin(".hgeol")) |
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|
249 except OSError: |
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250 eolmtime = 0 |
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251 |
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252 if eolmtime > cachemtime: |
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253 ui.debug("eol: detected change in .hgeol\n") |
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254 # TODO: we could introduce a method for this in dirstate. |
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255 wlock = None |
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256 try: |
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257 wlock = self.wlock() |
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258 for f, e in self.dirstate._map.iteritems(): |
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259 self.dirstate._map[f] = (e[0], e[1], -1, 0) |
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260 self.dirstate._dirty = True |
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261 # Touch the cache to update mtime. |
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262 self.opener("eol.cache", "w").close() |
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263 wlock.release() |
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264 except error.LockUnavailable: |
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265 # If we cannot lock the repository and clear the |
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266 # dirstate, then a commit might not see all files |
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267 # as modified. But if we cannot lock the |
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268 # repository, then we can also not make a commit, |
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269 # so ignore the error. |
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270 pass |
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271 |
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272 def commitctx(self, ctx, error=False): |
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273 for f in sorted(ctx.added() + ctx.modified()): |
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274 if not self._eolfile(f): |
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275 continue |
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276 data = ctx[f].data() |
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277 if util.binary(data): |
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278 # We should not abort here, since the user should |
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279 # be able to say "** = native" to automatically |
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280 # have all non-binary files taken care of. |
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281 continue |
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282 if inconsistenteol(data): |
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283 raise util.Abort(_("inconsistent newline style " |
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284 "in %s\n" % f)) |
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285 return super(eolrepo, self).commitctx(ctx, error) |
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286 repo.__class__ = eolrepo |
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287 repo._hgcleardirstate() |