annotate hgext/win32text.py @ 8894:868670dbc237

extensions: improve the consistency of synopses Trying as much as possible to consistently: - use a present tense predicate followed by a direct object - verb referring directly to the functionality provided (ie. not "add command that does this" but simple "do that") - keep simple and to the point, leaving details for the long help (width is tight, possibly even more so for translations) Thanks to timeless, Martin Geisler, Rafael Villar Burke, Dan Villiom Podlaski Christiansen and others for the helpful suggestions.
author Cédric Duval <cedricduval@free.fr>
date Mon, 22 Jun 2009 15:48:08 +0200
parents e872ef2e6758
children 1de6e7e1bb9f
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, incorporated herein by reference.
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7
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8 '''perform automatic newline conversion
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9
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10 To perform automatic newline conversion, use:
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11
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12 [extensions]
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13 hgext.win32text =
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14 [encode]
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15 ** = cleverencode:
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16 # or ** = macencode:
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17
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18 [decode]
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19 ** = cleverdecode:
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20 # or ** = macdecode:
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21
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22 If not doing conversion, to make sure you do not commit CRLF/CR by accident:
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23
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24 [hooks]
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25 pretxncommit.crlf = python:hgext.win32text.forbidcrlf
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26 # or pretxncommit.cr = python:hgext.win32text.forbidcr
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27
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28 To do the same check on a server to prevent CRLF/CR from being
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29 pushed or pulled:
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30
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31 [hooks]
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32 pretxnchangegroup.crlf = python:hgext.win32text.forbidcrlf
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33 # or pretxnchangegroup.cr = python:hgext.win32text.forbidcr
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34 '''
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35
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36 from mercurial.i18n import _
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37 from mercurial.node import short
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38 from mercurial import util
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39 import re
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40
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41 # regexp for single LF without CR preceding.
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42 re_single_lf = re.compile('(^|[^\r])\n', re.MULTILINE)
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43
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44 newlinestr = {'\r\n': 'CRLF', '\r': 'CR'}
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45 filterstr = {'\r\n': 'clever', '\r': 'mac'}
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46
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47 def checknewline(s, newline, ui=None, repo=None, filename=None):
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48 # warn if already has 'newline' in repository.
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49 # it might cause unexpected eol conversion.
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50 # see issue 302:
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51 # http://www.selenic.com/mercurial/bts/issue302
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52 if newline in s and ui and filename and repo:
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53 ui.warn(_('WARNING: %s already has %s line endings\n'
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54 'and does not need EOL conversion by the win32text plugin.\n'
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55 'Before your next commit, please reconsider your '
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56 'encode/decode settings in \nMercurial.ini or %s.\n') %
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57 (filename, newlinestr[newline], repo.join('hgrc')))
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58
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59 def dumbdecode(s, cmd, **kwargs):
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60 checknewline(s, '\r\n', **kwargs)
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61 # replace single LF to CRLF
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62 return re_single_lf.sub('\\1\r\n', s)
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63
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64 def dumbencode(s, cmd):
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65 return s.replace('\r\n', '\n')
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66
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67 def macdumbdecode(s, cmd, **kwargs):
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68 checknewline(s, '\r', **kwargs)
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69 return s.replace('\n', '\r')
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70
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71 def macdumbencode(s, cmd):
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72 return s.replace('\r', '\n')
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73
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74 def cleverdecode(s, cmd, **kwargs):
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75 if not util.binary(s):
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76 return dumbdecode(s, cmd, **kwargs)
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77 return s
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78
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79 def cleverencode(s, cmd):
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80 if not util.binary(s):
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81 return dumbencode(s, cmd)
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82 return s
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83
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84 def macdecode(s, cmd, **kwargs):
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85 if not util.binary(s):
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86 return macdumbdecode(s, cmd, **kwargs)
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87 return s
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88
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89 def macencode(s, cmd):
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90 if not util.binary(s):
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91 return macdumbencode(s, cmd)
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92 return s
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93
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94 _filters = {
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95 'dumbdecode:': dumbdecode,
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96 'dumbencode:': dumbencode,
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97 'cleverdecode:': cleverdecode,
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98 'cleverencode:': cleverencode,
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99 'macdumbdecode:': macdumbdecode,
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100 'macdumbencode:': macdumbencode,
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101 'macdecode:': macdecode,
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102 'macencode:': macencode,
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103 }
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104
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105 def forbidnewline(ui, repo, hooktype, node, newline, **kwargs):
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106 halt = False
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107 seen = set()
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108 # we try to walk changesets in reverse order from newest to
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109 # oldest, so that if we see a file multiple times, we take the
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110 # newest version as canonical. this prevents us from blocking a
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111 # changegroup that contains an unacceptable commit followed later
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112 # by a commit that fixes the problem.
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113 tip = repo['tip']
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114 for rev in xrange(len(repo)-1, repo[node].rev()-1, -1):
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115 c = repo[rev]
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116 for f in c.files():
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117 if f in seen or f not in tip or f not in c:
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118 continue
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119 seen.add(f)
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120 data = c[f].data()
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121 if not util.binary(data) and newline in data:
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122 if not halt:
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123 ui.warn(_('Attempt to commit or push text file(s) '
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124 'using %s line endings\n') %
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125 newlinestr[newline])
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126 ui.warn(_('in %s: %s\n') % (short(c.node()), f))
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127 halt = True
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128 if halt and hooktype == 'pretxnchangegroup':
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129 crlf = newlinestr[newline].lower()
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130 filter = filterstr[newline]
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131 ui.warn(_('\nTo prevent this mistake in your local repository,\n'
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132 'add to Mercurial.ini or .hg/hgrc:\n'
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133 '\n'
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134 '[hooks]\n'
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OHASHI Hideya <ohachige@gmail.com>
parents: 6247
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135 'pretxncommit.%s = python:hgext.win32text.forbid%s\n'
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136 '\n'
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parents: 4859
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137 'and also consider adding:\n'
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parents: 4859
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138 '\n'
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parents: 4859
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139 '[extensions]\n'
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140 'hgext.win32text =\n'
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141 '[encode]\n'
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OHASHI Hideya <ohachige@gmail.com>
parents: 6247
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142 '** = %sencode:\n'
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143 '[decode]\n'
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144 '** = %sdecode:\n') % (crlf, crlf, filter, filter))
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145 return halt
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146
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147 def forbidcrlf(ui, repo, hooktype, node, **kwargs):
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148 return forbidnewline(ui, repo, hooktype, node, '\r\n', **kwargs)
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149
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150 def forbidcr(ui, repo, hooktype, node, **kwargs):
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151 return forbidnewline(ui, repo, hooktype, node, '\r', **kwargs)
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152
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153 def reposetup(ui, repo):
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154 if not repo.local():
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155 return
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156 for name, fn in _filters.iteritems():
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157 repo.adddatafilter(name, fn)
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158