annotate hgext/win32text.py @ 17451:8e1fa8a32f2b

histedit: fix unused variable warnings spotted by pyflakes
author Patrick Mezard <patrick@mezard.eu>
date Wed, 05 Sep 2012 22:01:09 +0200
parents 7985a9e2ddce
children b35e3364f94a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # win32text.py - LF <-> CRLF/CR translation utilities for Windows/Mac users
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2 #
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3 # Copyright 2005, 2007-2009 Matt Mackall <mpm@selenic.com> and others
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 '''perform automatic newline conversion
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9
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10 Deprecation: The win32text extension requires each user to configure
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11 the extension again and again for each clone since the configuration
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12 is not copied when cloning.
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13
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14 We have therefore made the ``eol`` as an alternative. The ``eol``
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15 uses a version controlled file for its configuration and each clone
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16 will therefore use the right settings from the start.
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17
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18 To perform automatic newline conversion, use::
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19
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20 [extensions]
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21 win32text =
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22 [encode]
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23 ** = cleverencode:
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24 # or ** = macencode:
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25
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26 [decode]
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27 ** = cleverdecode:
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28 # or ** = macdecode:
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29
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30 If not doing conversion, to make sure you do not commit CRLF/CR by accident::
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31
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32 [hooks]
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33 pretxncommit.crlf = python:hgext.win32text.forbidcrlf
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34 # or pretxncommit.cr = python:hgext.win32text.forbidcr
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35
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36 To do the same check on a server to prevent CRLF/CR from being
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37 pushed or pulled::
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38
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39 [hooks]
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40 pretxnchangegroup.crlf = python:hgext.win32text.forbidcrlf
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41 # or pretxnchangegroup.cr = python:hgext.win32text.forbidcr
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42 '''
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43
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44 from mercurial.i18n import _
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45 from mercurial.node import short
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46 from mercurial import util
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47 import re
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48
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49 testedwith = 'internal'
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50
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51 # regexp for single LF without CR preceding.
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52 re_single_lf = re.compile('(^|[^\r])\n', re.MULTILINE)
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53
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54 newlinestr = {'\r\n': 'CRLF', '\r': 'CR'}
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55 filterstr = {'\r\n': 'clever', '\r': 'mac'}
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56
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57 def checknewline(s, newline, ui=None, repo=None, filename=None):
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58 # warn if already has 'newline' in repository.
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59 # it might cause unexpected eol conversion.
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60 # see issue 302:
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61 # http://mercurial.selenic.com/bts/issue302
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62 if newline in s and ui and filename and repo:
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63 ui.warn(_('WARNING: %s already has %s line endings\n'
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64 'and does not need EOL conversion by the win32text plugin.\n'
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65 'Before your next commit, please reconsider your '
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66 'encode/decode settings in \nMercurial.ini or %s.\n') %
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67 (filename, newlinestr[newline], repo.join('hgrc')))
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68
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69 def dumbdecode(s, cmd, **kwargs):
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70 checknewline(s, '\r\n', **kwargs)
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71 # replace single LF to CRLF
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72 return re_single_lf.sub('\\1\r\n', s)
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73
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74 def dumbencode(s, cmd):
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75 return s.replace('\r\n', '\n')
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76
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77 def macdumbdecode(s, cmd, **kwargs):
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78 checknewline(s, '\r', **kwargs)
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79 return s.replace('\n', '\r')
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80
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81 def macdumbencode(s, cmd):
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82 return s.replace('\r', '\n')
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83
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84 def cleverdecode(s, cmd, **kwargs):
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85 if not util.binary(s):
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86 return dumbdecode(s, cmd, **kwargs)
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87 return s
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88
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89 def cleverencode(s, cmd):
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90 if not util.binary(s):
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91 return dumbencode(s, cmd)
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92 return s
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93
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94 def macdecode(s, cmd, **kwargs):
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95 if not util.binary(s):
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96 return macdumbdecode(s, cmd, **kwargs)
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97 return s
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98
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99 def macencode(s, cmd):
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100 if not util.binary(s):
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101 return macdumbencode(s, cmd)
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102 return s
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103
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104 _filters = {
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105 'dumbdecode:': dumbdecode,
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106 'dumbencode:': dumbencode,
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107 'cleverdecode:': cleverdecode,
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108 'cleverencode:': cleverencode,
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109 'macdumbdecode:': macdumbdecode,
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110 'macdumbencode:': macdumbencode,
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111 'macdecode:': macdecode,
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112 'macencode:': macencode,
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113 }
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114
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115 def forbidnewline(ui, repo, hooktype, node, newline, **kwargs):
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116 halt = False
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117 seen = set()
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118 # we try to walk changesets in reverse order from newest to
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119 # oldest, so that if we see a file multiple times, we take the
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120 # newest version as canonical. this prevents us from blocking a
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121 # changegroup that contains an unacceptable commit followed later
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122 # by a commit that fixes the problem.
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123 tip = repo['tip']
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124 for rev in xrange(len(repo)-1, repo[node].rev()-1, -1):
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125 c = repo[rev]
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126 for f in c.files():
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127 if f in seen or f not in tip or f not in c:
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128 continue
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129 seen.add(f)
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130 data = c[f].data()
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131 if not util.binary(data) and newline in data:
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132 if not halt:
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133 ui.warn(_('attempt to commit or push text file(s) '
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134 'using %s line endings\n') %
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135 newlinestr[newline])
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136 ui.warn(_('in %s: %s\n') % (short(c.node()), f))
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137 halt = True
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138 if halt and hooktype == 'pretxnchangegroup':
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139 crlf = newlinestr[newline].lower()
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140 filter = filterstr[newline]
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141 ui.warn(_('\nTo prevent this mistake in your local repository,\n'
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142 'add to Mercurial.ini or .hg/hgrc:\n'
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143 '\n'
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144 '[hooks]\n'
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145 'pretxncommit.%s = python:hgext.win32text.forbid%s\n'
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146 '\n'
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147 'and also consider adding:\n'
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148 '\n'
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149 '[extensions]\n'
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150 'win32text =\n'
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151 '[encode]\n'
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152 '** = %sencode:\n'
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153 '[decode]\n'
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154 '** = %sdecode:\n') % (crlf, crlf, filter, filter))
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155 return halt
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156
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157 def forbidcrlf(ui, repo, hooktype, node, **kwargs):
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158 return forbidnewline(ui, repo, hooktype, node, '\r\n', **kwargs)
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159
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160 def forbidcr(ui, repo, hooktype, node, **kwargs):
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161 return forbidnewline(ui, repo, hooktype, node, '\r', **kwargs)
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162
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163 def reposetup(ui, repo):
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164 if not repo.local():
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165 return
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166 for name, fn in _filters.iteritems():
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167 repo.adddatafilter(name, fn)
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168
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169 def extsetup(ui):
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170 if ui.configbool('win32text', 'warn', True):
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171 ui.warn(_("win32text is deprecated: "
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172 "http://mercurial.selenic.com/wiki/Win32TextExtension\n"))