Mercurial > hg
annotate mercurial/filemerge.py @ 21825:3666331164bb stable
cmdutil: add copy-filtering support to duplicatecopies
In order to fix issue 4192 we need to be able to skip some copies
while doing duplicatecopies.
author | Augie Fackler <raf@durin42.com> |
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date | Sat, 07 Jun 2014 15:14:36 -0400 |
parents | 098a274764b3 |
children | 20b8090d8125 |
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filemerge: pull file-merging code into its own module
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1 # filemerge.py - file-level merge handling for Mercurial |
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2 # |
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3 # Copyright 2006, 2007, 2008 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from node import short |
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9 from i18n import _ |
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10 import util, simplemerge, match, error |
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11 import os, tempfile, re, filecmp |
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12 |
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13 def _toolstr(ui, tool, part, default=""): |
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14 return ui.config("merge-tools", tool + "." + part, default) |
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15 |
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16 def _toolbool(ui, tool, part, default=False): |
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17 return ui.configbool("merge-tools", tool + "." + part, default) |
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18 |
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19 def _toollist(ui, tool, part, default=[]): |
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20 return ui.configlist("merge-tools", tool + "." + part, default) |
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21 |
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22 internals = {} |
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23 |
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24 def internaltool(name, trymerge, onfailure=None): |
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25 '''return a decorator for populating internal merge tool table''' |
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26 def decorator(func): |
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27 fullname = 'internal:' + name |
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28 func.__doc__ = "``%s``\n" % fullname + func.__doc__.strip() |
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29 internals[fullname] = func |
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30 func.trymerge = trymerge |
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31 func.onfailure = onfailure |
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32 return func |
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33 return decorator |
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34 |
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35 def _findtool(ui, tool): |
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36 if tool in internals: |
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37 return tool |
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38 for kn in ("regkey", "regkeyalt"): |
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39 k = _toolstr(ui, tool, kn) |
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40 if not k: |
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41 continue |
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42 p = util.lookupreg(k, _toolstr(ui, tool, "regname")) |
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43 if p: |
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44 p = util.findexe(p + _toolstr(ui, tool, "regappend")) |
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45 if p: |
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46 return p |
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47 exe = _toolstr(ui, tool, "executable", tool) |
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48 return util.findexe(util.expandpath(exe)) |
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49 |
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50 def _picktool(repo, ui, path, binary, symlink): |
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51 def check(tool, pat, symlink, binary): |
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52 tmsg = tool |
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53 if pat: |
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54 tmsg += " specified for " + pat |
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55 if not _findtool(ui, tool): |
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56 if pat: # explicitly requested tool deserves a warning |
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57 ui.warn(_("couldn't find merge tool %s\n") % tmsg) |
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58 else: # configured but non-existing tools are more silent |
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59 ui.note(_("couldn't find merge tool %s\n") % tmsg) |
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60 elif symlink and not _toolbool(ui, tool, "symlink"): |
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61 ui.warn(_("tool %s can't handle symlinks\n") % tmsg) |
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62 elif binary and not _toolbool(ui, tool, "binary"): |
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63 ui.warn(_("tool %s can't handle binary\n") % tmsg) |
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64 elif not util.gui() and _toolbool(ui, tool, "gui"): |
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65 ui.warn(_("tool %s requires a GUI\n") % tmsg) |
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66 else: |
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67 return True |
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68 return False |
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69 |
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70 # forcemerge comes from command line arguments, highest priority |
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71 force = ui.config('ui', 'forcemerge') |
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72 if force: |
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73 toolpath = _findtool(ui, force) |
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74 if toolpath: |
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75 return (force, util.shellquote(toolpath)) |
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76 else: |
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77 # mimic HGMERGE if given tool not found |
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78 return (force, force) |
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79 |
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80 # HGMERGE takes next precedence |
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81 hgmerge = os.environ.get("HGMERGE") |
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82 if hgmerge: |
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83 return (hgmerge, hgmerge) |
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84 |
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85 # then patterns |
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86 for pat, tool in ui.configitems("merge-patterns"): |
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87 mf = match.match(repo.root, '', [pat]) |
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88 if mf(path) and check(tool, pat, symlink, False): |
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89 toolpath = _findtool(ui, tool) |
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90 return (tool, util.shellquote(toolpath)) |
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91 |
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92 # then merge tools |
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93 tools = {} |
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94 for k, v in ui.configitems("merge-tools"): |
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95 t = k.split('.')[0] |
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96 if t not in tools: |
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97 tools[t] = int(_toolstr(ui, t, "priority", "0")) |
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98 names = tools.keys() |
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99 tools = sorted([(-p, t) for t, p in tools.items()]) |
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100 uimerge = ui.config("ui", "merge") |
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101 if uimerge: |
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102 if uimerge not in names: |
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103 return (uimerge, uimerge) |
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104 tools.insert(0, (None, uimerge)) # highest priority |
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105 tools.append((None, "hgmerge")) # the old default, if found |
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106 for p, t in tools: |
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107 if check(t, None, symlink, binary): |
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108 toolpath = _findtool(ui, t) |
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109 return (t, util.shellquote(toolpath)) |
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110 |
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111 # internal merge or prompt as last resort |
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112 if symlink or binary: |
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113 return "internal:prompt", None |
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114 return "internal:merge", None |
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115 |
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116 def _eoltype(data): |
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117 "Guess the EOL type of a file" |
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118 if '\0' in data: # binary |
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119 return None |
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120 if '\r\n' in data: # Windows |
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121 return '\r\n' |
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122 if '\r' in data: # Old Mac |
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123 return '\r' |
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124 if '\n' in data: # UNIX |
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125 return '\n' |
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126 return None # unknown |
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127 |
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128 def _matcheol(file, origfile): |
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129 "Convert EOL markers in a file to match origfile" |
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130 tostyle = _eoltype(util.readfile(origfile)) |
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131 if tostyle: |
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132 data = util.readfile(file) |
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133 style = _eoltype(data) |
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134 if style: |
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135 newdata = data.replace(style, tostyle) |
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136 if newdata != data: |
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137 util.writefile(file, newdata) |
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138 |
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139 @internaltool('prompt', False) |
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140 def _iprompt(repo, mynode, orig, fcd, fco, fca, toolconf): |
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141 """Asks the user which of the local or the other version to keep as |
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142 the merged version.""" |
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143 ui = repo.ui |
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144 fd = fcd.path() |
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145 |
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146 if ui.promptchoice(_(" no tool found to merge %s\n" |
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147 "keep (l)ocal or take (o)ther?" |
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148 "$$ &Local $$ &Other") % fd, 0): |
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149 return _iother(repo, mynode, orig, fcd, fco, fca, toolconf) |
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150 else: |
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151 return _ilocal(repo, mynode, orig, fcd, fco, fca, toolconf) |
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152 |
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153 @internaltool('local', False) |
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154 def _ilocal(repo, mynode, orig, fcd, fco, fca, toolconf): |
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155 """Uses the local version of files as the merged version.""" |
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156 return 0 |
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157 |
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158 @internaltool('other', False) |
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159 def _iother(repo, mynode, orig, fcd, fco, fca, toolconf): |
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160 """Uses the other version of files as the merged version.""" |
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161 repo.wwrite(fcd.path(), fco.data(), fco.flags()) |
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162 return 0 |
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163 |
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164 @internaltool('fail', False) |
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165 def _ifail(repo, mynode, orig, fcd, fco, fca, toolconf): |
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166 """ |
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167 Rather than attempting to merge files that were modified on both |
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168 branches, it marks them as unresolved. The resolve command must be |
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169 used to resolve these conflicts.""" |
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170 return 1 |
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171 |
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172 def _premerge(repo, toolconf, files): |
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173 tool, toolpath, binary, symlink = toolconf |
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174 if symlink: |
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175 return 1 |
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176 a, b, c, back = files |
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177 |
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178 ui = repo.ui |
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179 |
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180 # do we attempt to simplemerge first? |
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181 try: |
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182 premerge = _toolbool(ui, tool, "premerge", not binary) |
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183 except error.ConfigError: |
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184 premerge = _toolstr(ui, tool, "premerge").lower() |
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185 valid = 'keep'.split() |
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186 if premerge not in valid: |
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187 _valid = ', '.join(["'" + v + "'" for v in valid]) |
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188 raise error.ConfigError(_("%s.premerge not valid " |
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189 "('%s' is neither boolean nor %s)") % |
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190 (tool, premerge, _valid)) |
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191 |
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192 if premerge: |
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193 r = simplemerge.simplemerge(ui, a, b, c, quiet=True) |
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194 if not r: |
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195 ui.debug(" premerge successful\n") |
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196 return 0 |
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197 if premerge != 'keep': |
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198 util.copyfile(back, a) # restore from backup and try again |
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199 return 1 # continue merging |
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200 |
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201 @internaltool('merge', True, |
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202 _("merging %s incomplete! " |
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203 "(edit conflicts, then use 'hg resolve --mark')\n")) |
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204 def _imerge(repo, mynode, orig, fcd, fco, fca, toolconf, files): |
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205 """ |
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206 Uses the internal non-interactive simple merge algorithm for merging |
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207 files. It will fail if there are any conflicts and leave markers in |
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208 the partially merged file.""" |
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209 tool, toolpath, binary, symlink = toolconf |
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210 if symlink: |
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211 repo.ui.warn(_('warning: internal:merge cannot merge symlinks ' |
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212 'for %s\n') % fcd.path()) |
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213 return False, 1 |
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214 |
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215 r = _premerge(repo, toolconf, files) |
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216 if r: |
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217 a, b, c, back = files |
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218 |
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219 ui = repo.ui |
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220 |
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221 r = simplemerge.simplemerge(ui, a, b, c, label=['local', 'other']) |
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222 return True, r |
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223 return False, 0 |
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224 |
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225 @internaltool('dump', True) |
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226 def _idump(repo, mynode, orig, fcd, fco, fca, toolconf, files): |
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227 """ |
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228 Creates three versions of the files to merge, containing the |
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229 contents of local, other and base. These files can then be used to |
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230 perform a merge manually. If the file to be merged is named |
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231 ``a.txt``, these files will accordingly be named ``a.txt.local``, |
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232 ``a.txt.other`` and ``a.txt.base`` and they will be placed in the |
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233 same directory as ``a.txt``.""" |
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234 r = _premerge(repo, toolconf, files) |
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235 if r: |
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236 a, b, c, back = files |
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237 |
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238 fd = fcd.path() |
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239 |
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240 util.copyfile(a, a + ".local") |
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241 repo.wwrite(fd + ".other", fco.data(), fco.flags()) |
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242 repo.wwrite(fd + ".base", fca.data(), fca.flags()) |
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243 return False, r |
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244 |
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245 def _xmerge(repo, mynode, orig, fcd, fco, fca, toolconf, files): |
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246 r = _premerge(repo, toolconf, files) |
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247 if r: |
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248 tool, toolpath, binary, symlink = toolconf |
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249 a, b, c, back = files |
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250 out = "" |
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251 env = {'HG_FILE': fcd.path(), |
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252 'HG_MY_NODE': short(mynode), |
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253 'HG_OTHER_NODE': str(fco.changectx()), |
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254 'HG_BASE_NODE': str(fca.changectx()), |
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255 'HG_MY_ISLINK': 'l' in fcd.flags(), |
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256 'HG_OTHER_ISLINK': 'l' in fco.flags(), |
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257 'HG_BASE_ISLINK': 'l' in fca.flags(), |
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258 } |
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259 |
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260 ui = repo.ui |
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261 |
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262 args = _toolstr(ui, tool, "args", '$local $base $other') |
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263 if "$output" in args: |
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264 out, a = a, back # read input from backup, write to original |
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265 replace = {'local': a, 'base': b, 'other': c, 'output': out} |
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266 args = util.interpolate(r'\$', replace, args, |
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267 lambda s: util.shellquote(util.localpath(s))) |
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268 r = util.system(toolpath + ' ' + args, cwd=repo.root, environ=env, |
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269 out=ui.fout) |
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270 return True, r |
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271 return False, 0 |
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272 |
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273 def filemerge(repo, mynode, orig, fcd, fco, fca): |
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274 """perform a 3-way merge in the working directory |
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275 |
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276 mynode = parent node before merge |
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277 orig = original local filename before merge |
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278 fco = other file context |
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279 fca = ancestor file context |
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280 fcd = local file context for current/destination file |
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281 """ |
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282 |
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283 def temp(prefix, ctx): |
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284 pre = "%s~%s." % (os.path.basename(ctx.path()), prefix) |
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285 (fd, name) = tempfile.mkstemp(prefix=pre) |
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286 data = repo.wwritedata(ctx.path(), ctx.data()) |
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287 f = os.fdopen(fd, "wb") |
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288 f.write(data) |
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289 f.close() |
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290 return name |
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291 |
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292 if not fco.cmp(fcd): # files identical? |
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293 return None |
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294 |
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295 ui = repo.ui |
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296 fd = fcd.path() |
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297 binary = fcd.isbinary() or fco.isbinary() or fca.isbinary() |
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298 symlink = 'l' in fcd.flags() + fco.flags() |
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299 tool, toolpath = _picktool(repo, ui, fd, binary, symlink) |
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300 ui.debug("picked tool '%s' for %s (binary %s symlink %s)\n" % |
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301 (tool, fd, binary, symlink)) |
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302 |
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303 if tool in internals: |
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304 func = internals[tool] |
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305 trymerge = func.trymerge |
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306 onfailure = func.onfailure |
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307 else: |
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308 func = _xmerge |
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309 trymerge = True |
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310 onfailure = _("merging %s failed!\n") |
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311 |
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312 toolconf = tool, toolpath, binary, symlink |
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313 |
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314 if not trymerge: |
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315 return func(repo, mynode, orig, fcd, fco, fca, toolconf) |
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316 |
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317 a = repo.wjoin(fd) |
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318 b = temp("base", fca) |
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319 c = temp("other", fco) |
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320 back = a + ".orig" |
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321 util.copyfile(a, back) |
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322 |
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323 if orig != fco.path(): |
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324 ui.status(_("merging %s and %s to %s\n") % (orig, fco.path(), fd)) |
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325 else: |
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326 ui.status(_("merging %s\n") % fd) |
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327 |
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328 ui.debug("my %s other %s ancestor %s\n" % (fcd, fco, fca)) |
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329 |
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330 needcheck, r = func(repo, mynode, orig, fcd, fco, fca, toolconf, |
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331 (a, b, c, back)) |
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332 if not needcheck: |
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333 if r: |
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334 if onfailure: |
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335 ui.warn(onfailure % fd) |
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336 else: |
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337 util.unlink(back) |
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338 |
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339 util.unlink(b) |
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340 util.unlink(c) |
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341 return r |
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342 |
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343 if not r and (_toolbool(ui, tool, "checkconflicts") or |
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344 'conflicts' in _toollist(ui, tool, "check")): |
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345 if re.search("^(<<<<<<< .*|=======|>>>>>>> .*)$", fcd.data(), |
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346 re.MULTILINE): |
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347 r = 1 |
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348 |
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349 checked = False |
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350 if 'prompt' in _toollist(ui, tool, "check"): |
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351 checked = True |
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352 if ui.promptchoice(_("was merge of '%s' successful (yn)?" |
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353 "$$ &Yes $$ &No") % fd, 1): |
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354 r = 1 |
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355 |
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356 if not r and not checked and (_toolbool(ui, tool, "checkchanged") or |
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357 'changed' in _toollist(ui, tool, "check")): |
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358 if filecmp.cmp(a, back): |
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359 if ui.promptchoice(_(" output file %s appears unchanged\n" |
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360 "was merge successful (yn)?" |
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361 "$$ &Yes $$ &No") % fd, 1): |
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362 r = 1 |
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363 |
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364 if _toolbool(ui, tool, "fixeol"): |
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365 _matcheol(a, back) |
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366 |
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367 if r: |
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368 if onfailure: |
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369 ui.warn(onfailure % fd) |
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370 else: |
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371 util.unlink(back) |
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372 |
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373 util.unlink(b) |
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374 util.unlink(c) |
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375 return r |
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376 |
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377 # tell hggettext to extract docstrings from these functions: |
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378 i18nfunctions = internals.values() |