Mercurial > hg
annotate mercurial/filemerge.py @ 6144:08e0825b8106
revlog.revision: avoid opening the datafile without need.
If there's no inline data, revlog.revision opens the data file every
time it's called. This is useful if we're going to call chunk many
times, but, if we're going to call it only once, it's better to let
chunk open the file - if we're lucky, all the data we're going to need
is already cached and we won't need to even look at the file.
author | Alexis S. L. Carvalho <alexis@cecm.usp.br> |
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date | Tue, 19 Feb 2008 19:20:10 -0300 |
parents | 0ee885fea464 |
children | f89fd07fc51d |
rev | line source |
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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 |
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6 # of the GNU General Public License, incorporated herein by reference. |
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7 |
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8 from node import * |
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9 from i18n import _ |
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10 import util, os, tempfile, context, simplemerge, re, filecmp |
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11 |
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12 def _toolstr(ui, tool, part, default=""): |
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13 return ui.config("merge-tools", tool + "." + part, default) |
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14 |
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15 def _toolbool(ui, tool, part, default=False): |
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16 return ui.configbool("merge-tools", tool + "." + part, default) |
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17 |
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18 def _findtool(ui, tool): |
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19 k = _toolstr(ui, tool, "regkey") |
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20 if k: |
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21 p = util.lookup_reg(k, _toolstr(ui, tool, "regname")) |
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22 if p: |
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23 p = util.find_exe(p + _toolstr(ui, tool, "regappend")) |
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24 if p: |
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25 return p |
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26 return util.find_exe(_toolstr(ui, tool, "executable", tool)) |
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27 |
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28 def _picktool(repo, ui, path, binary, symlink): |
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29 def check(tool, pat, symlink, binary): |
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30 tmsg = tool |
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31 if pat: |
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32 tmsg += " specified for " + pat |
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33 if pat and not _findtool(ui, tool): # skip search if not matching |
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34 ui.warn(_("couldn't find merge tool %s\n") % tmsg) |
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35 elif symlink and not _toolbool(ui, tool, "symlink"): |
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36 ui.warn(_("tool %s can't handle symlinks\n") % tmsg) |
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37 elif binary and not _toolbool(ui, tool, "binary"): |
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38 ui.warn(_("tool %s can't handle binary\n") % tmsg) |
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39 elif not util.gui() and _toolbool(ui, tool, "gui"): |
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40 ui.warn(_("tool %s requires a GUI\n") % tmsg) |
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41 else: |
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42 return True |
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43 return False |
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44 |
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45 # HGMERGE takes precedence |
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46 hgmerge = os.environ.get("HGMERGE") |
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47 if hgmerge: |
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48 return (hgmerge, hgmerge) |
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49 |
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50 # then patterns |
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51 for pat, tool in ui.configitems("merge-patterns"): |
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52 mf = util.matcher(repo.root, "", [pat], [], [])[1] |
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53 if mf(path) and check(tool, pat, symlink, False): |
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54 toolpath = _findtool(ui, tool) |
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55 return (tool, '"' + toolpath + '"') |
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56 |
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57 # then merge tools |
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58 tools = {} |
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59 for k,v in ui.configitems("merge-tools"): |
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60 t = k.split('.')[0] |
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61 if t not in tools: |
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62 tools[t] = int(_toolstr(ui, t, "priority", "0")) |
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63 names = tools.keys() |
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64 tools = [(-p,t) for t,p in tools.items()] |
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65 tools.sort() |
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66 uimerge = ui.config("ui", "merge") |
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67 if uimerge: |
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68 if uimerge not in names: |
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69 return (uimerge, uimerge) |
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70 tools.insert(0, (None, uimerge)) # highest priority |
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71 tools.append((None, "hgmerge")) # the old default, if found |
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72 for p,t in tools: |
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73 toolpath = _findtool(ui, t) |
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74 if toolpath and check(t, None, symlink, binary): |
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75 return (t, '"' + toolpath + '"') |
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76 # internal merge as last resort |
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77 return (not (symlink or binary) and "internal:merge" or None, None) |
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78 |
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79 def _eoltype(data): |
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80 "Guess the EOL type of a file" |
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81 if '\0' in data: # binary |
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82 return None |
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83 if '\r\n' in data: # Windows |
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84 return '\r\n' |
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85 if '\r' in data: # Old Mac |
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86 return '\r' |
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87 if '\n' in data: # UNIX |
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88 return '\n' |
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89 return None # unknown |
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90 |
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91 def _matcheol(file, origfile): |
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92 "Convert EOL markers in a file to match origfile" |
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93 tostyle = _eoltype(open(origfile, "rb").read()) |
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94 if tostyle: |
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95 data = open(file, "rb").read() |
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96 style = _eoltype(data) |
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97 if style: |
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98 newdata = data.replace(style, tostyle) |
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99 if newdata != data: |
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100 open(file, "wb").write(newdata) |
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101 |
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102 def filemerge(repo, fw, fd, fo, wctx, mctx): |
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103 """perform a 3-way merge in the working directory |
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104 |
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105 fw = original filename in the working directory |
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106 fd = destination filename in the working directory |
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107 fo = filename in other parent |
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108 wctx, mctx = working and merge changecontexts |
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109 """ |
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110 |
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111 def temp(prefix, ctx): |
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112 pre = "%s~%s." % (os.path.basename(ctx.path()), prefix) |
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113 (fd, name) = tempfile.mkstemp(prefix=pre) |
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114 data = repo.wwritedata(ctx.path(), ctx.data()) |
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115 f = os.fdopen(fd, "wb") |
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116 f.write(data) |
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117 f.close() |
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118 return name |
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119 |
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120 def isbin(ctx): |
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121 try: |
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122 return util.binary(ctx.data()) |
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123 except IOError: |
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124 return False |
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125 |
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126 fco = mctx.filectx(fo) |
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127 if not fco.cmp(wctx.filectx(fd).data()): # files identical? |
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128 return None |
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129 |
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130 ui = repo.ui |
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131 fcm = wctx.filectx(fw) |
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132 fca = fcm.ancestor(fco) or repo.filectx(fw, fileid=nullrev) |
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133 binary = isbin(fcm) or isbin(fco) or isbin(fca) |
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134 symlink = fcm.islink() or fco.islink() |
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135 tool, toolpath = _picktool(repo, ui, fw, binary, symlink) |
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136 ui.debug(_("picked tool '%s' for %s (binary %s symlink %s)\n") % |
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137 (tool, fw, binary, symlink)) |
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138 |
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139 if not tool: |
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140 tool = "internal:local" |
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141 if ui.prompt(_(" no tool found to merge %s\n" |
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142 "keep (l)ocal or take (o)ther?") % fw, |
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143 _("[lo]"), _("l")) != _("l"): |
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144 tool = "internal:other" |
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145 if tool == "internal:local": |
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146 return 0 |
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147 if tool == "internal:other": |
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148 repo.wwrite(fd, fco.data(), fco.fileflags()) |
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149 return 0 |
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150 if tool == "internal:fail": |
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151 return 1 |
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152 |
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153 # do the actual merge |
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154 a = repo.wjoin(fd) |
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155 b = temp("base", fca) |
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156 c = temp("other", fco) |
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157 out = "" |
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158 back = a + ".orig" |
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159 util.copyfile(a, back) |
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160 |
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161 if fw != fo: |
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162 repo.ui.status(_("merging %s and %s\n") % (fw, fo)) |
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163 else: |
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164 repo.ui.status(_("merging %s\n") % fw) |
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165 repo.ui.debug(_("my %s other %s ancestor %s\n") % (fcm, fco, fca)) |
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166 |
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167 # do we attempt to simplemerge first? |
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168 if _toolbool(ui, tool, "premerge", not (binary or symlink)): |
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169 r = simplemerge.simplemerge(a, b, c, quiet=True) |
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170 if not r: |
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171 ui.debug(_(" premerge successful\n")) |
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172 os.unlink(back) |
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173 os.unlink(b) |
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174 os.unlink(c) |
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175 return 0 |
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176 util.copyfile(back, a) # restore from backup and try again |
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177 |
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178 env = dict(HG_FILE=fd, |
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179 HG_MY_NODE=str(wctx.parents()[0]), |
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180 HG_OTHER_NODE=str(mctx), |
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181 HG_MY_ISLINK=fcm.islink(), |
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182 HG_OTHER_ISLINK=fco.islink(), |
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183 HG_BASE_ISLINK=fca.islink()) |
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184 |
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185 if tool == "internal:merge": |
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186 r = simplemerge.simplemerge(a, b, c, label=['local', 'other']) |
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187 else: |
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188 args = _toolstr(ui, tool, "args", '$local $base $other') |
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189 if "$output" in args: |
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190 out, a = a, back # read input from backup, write to original |
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191 replace = dict(local=a, base=b, other=c, output=out) |
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192 args = re.sub("\$(local|base|other|output)", |
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193 lambda x: '"%s"' % replace[x.group()[1:]], args) |
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194 r = util.system(toolpath + ' ' + args, cwd=repo.root, environ=env) |
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195 |
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196 if not r and _toolbool(ui, tool, "checkconflicts"): |
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197 if re.match("^(<<<<<<< .*|=======|>>>>>>> .*)$", fcm.data()): |
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198 r = 1 |
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199 |
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200 if not r and _toolbool(ui, tool, "checkchanged"): |
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201 if filecmp.cmp(repo.wjoin(fd), back): |
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202 if ui.prompt(_(" output file %s appears unchanged\n" |
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203 "was merge successful (yn)?") % fd, |
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204 _("[yn]"), _("n")) != _("y"): |
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205 r = 1 |
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206 |
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207 if _toolbool(ui, tool, "fixeol"): |
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208 _matcheol(repo.wjoin(fd), back) |
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209 |
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210 if r: |
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211 repo.ui.warn(_("merging %s failed!\n") % fd) |
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212 else: |
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213 os.unlink(back) |
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214 |
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215 os.unlink(b) |
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216 os.unlink(c) |
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217 return r |