Mercurial > hg
annotate hgext/win32text.py @ 9664:2a4a0dc4fb85
walkchangerevs: reset cache between windows
author | Matt Mackall <mpm@selenic.com> |
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date | Thu, 29 Oct 2009 19:03:13 -0500 |
parents | 9cdb6964c3a3 |
children | 703db37d186b |
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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://mercurial.selenic.com/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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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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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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135 'pretxncommit.%s = python:hgext.win32text.forbid%s\n' |
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136 '\n' |
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137 'and also consider adding:\n' |
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138 '\n' |
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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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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 |