Mercurial > hg
annotate mercurial/filemerge.py @ 8575:aa4fcb5c46f1
match: optimize _globprefix
author | Matt Mackall <mpm@selenic.com> |
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date | Sun, 24 May 2009 02:56:14 -0500 |
parents | fea40a677d43 |
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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 |
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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 from node import short |
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9 from i18n import _ |
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10 import util, simplemerge, match |
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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 _findtool(ui, tool): |
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20 if tool in ("internal:fail", "internal:local", "internal:other"): |
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21 return tool |
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22 k = _toolstr(ui, tool, "regkey") |
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23 if k: |
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24 p = util.lookup_reg(k, _toolstr(ui, tool, "regname")) |
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25 if p: |
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26 p = util.find_exe(p + _toolstr(ui, tool, "regappend")) |
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27 if p: |
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28 return p |
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29 return util.find_exe(_toolstr(ui, tool, "executable", tool)) |
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30 |
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31 def _picktool(repo, ui, path, binary, symlink): |
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32 def check(tool, pat, symlink, binary): |
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33 tmsg = tool |
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34 if pat: |
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35 tmsg += " specified for " + pat |
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36 if not _findtool(ui, tool): |
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37 if pat: # explicitly requested tool deserves a warning |
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38 ui.warn(_("couldn't find merge tool %s\n") % tmsg) |
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39 else: # configured but non-existing tools are more silent |
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40 ui.note(_("couldn't find merge tool %s\n") % tmsg) |
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41 elif symlink and not _toolbool(ui, tool, "symlink"): |
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42 ui.warn(_("tool %s can't handle symlinks\n") % tmsg) |
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43 elif binary and not _toolbool(ui, tool, "binary"): |
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44 ui.warn(_("tool %s can't handle binary\n") % tmsg) |
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45 elif not util.gui() and _toolbool(ui, tool, "gui"): |
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46 ui.warn(_("tool %s requires a GUI\n") % tmsg) |
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47 else: |
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48 return True |
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49 return False |
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50 |
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51 # HGMERGE takes precedence |
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52 hgmerge = os.environ.get("HGMERGE") |
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53 if hgmerge: |
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54 return (hgmerge, hgmerge) |
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55 |
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56 # then patterns |
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57 for pat, tool in ui.configitems("merge-patterns"): |
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58 mf = match.match(repo.root, '', [pat]) |
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59 if mf(path) and check(tool, pat, symlink, False): |
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60 toolpath = _findtool(ui, tool) |
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61 return (tool, '"' + toolpath + '"') |
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62 |
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63 # then merge tools |
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64 tools = {} |
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65 for k,v in ui.configitems("merge-tools"): |
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66 t = k.split('.')[0] |
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67 if t not in tools: |
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68 tools[t] = int(_toolstr(ui, t, "priority", "0")) |
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69 names = tools.keys() |
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70 tools = sorted([(-p,t) for t,p in tools.items()]) |
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71 uimerge = ui.config("ui", "merge") |
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72 if uimerge: |
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73 if uimerge not in names: |
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74 return (uimerge, uimerge) |
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75 tools.insert(0, (None, uimerge)) # highest priority |
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76 tools.append((None, "hgmerge")) # the old default, if found |
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77 for p,t in tools: |
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78 if check(t, None, symlink, binary): |
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79 toolpath = _findtool(ui, t) |
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80 return (t, '"' + toolpath + '"') |
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81 # internal merge as last resort |
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82 return (not (symlink or binary) and "internal:merge" or None, None) |
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83 |
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84 def _eoltype(data): |
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85 "Guess the EOL type of a file" |
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86 if '\0' in data: # binary |
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87 return None |
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88 if '\r\n' in data: # Windows |
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89 return '\r\n' |
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90 if '\r' in data: # Old Mac |
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91 return '\r' |
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92 if '\n' in data: # UNIX |
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93 return '\n' |
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94 return None # unknown |
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95 |
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96 def _matcheol(file, origfile): |
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97 "Convert EOL markers in a file to match origfile" |
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98 tostyle = _eoltype(open(origfile, "rb").read()) |
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99 if tostyle: |
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100 data = open(file, "rb").read() |
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101 style = _eoltype(data) |
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102 if style: |
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103 newdata = data.replace(style, tostyle) |
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104 if newdata != data: |
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105 open(file, "wb").write(newdata) |
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106 |
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107 def filemerge(repo, mynode, orig, fcd, fco, fca): |
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108 """perform a 3-way merge in the working directory |
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109 |
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110 mynode = parent node before merge |
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111 orig = original local filename before merge |
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112 fco = other file context |
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113 fca = ancestor file context |
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114 fcd = local file context for current/destination file |
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115 """ |
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116 |
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117 def temp(prefix, ctx): |
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118 pre = "%s~%s." % (os.path.basename(ctx.path()), prefix) |
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119 (fd, name) = tempfile.mkstemp(prefix=pre) |
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120 data = repo.wwritedata(ctx.path(), ctx.data()) |
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121 f = os.fdopen(fd, "wb") |
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122 f.write(data) |
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123 f.close() |
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124 return name |
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125 |
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126 def isbin(ctx): |
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127 try: |
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128 return util.binary(ctx.data()) |
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129 except IOError: |
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130 return False |
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131 |
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132 if not fco.cmp(fcd.data()): # files identical? |
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133 return None |
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134 |
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135 ui = repo.ui |
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136 fd = fcd.path() |
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137 binary = isbin(fcd) or isbin(fco) or isbin(fca) |
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138 symlink = 'l' in fcd.flags() + fco.flags() |
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139 tool, toolpath = _picktool(repo, ui, fd, binary, symlink) |
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140 ui.debug(_("picked tool '%s' for %s (binary %s symlink %s)\n") % |
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141 (tool, fd, binary, symlink)) |
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142 |
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143 if not tool: |
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144 tool = "internal:local" |
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145 if ui.prompt(_(" no tool found to merge %s\n" |
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146 "keep (l)ocal or take (o)ther?") % fd, |
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147 (_("&Local"), _("&Other")), _("l")) != _("l"): |
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148 tool = "internal:other" |
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149 if tool == "internal:local": |
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150 return 0 |
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151 if tool == "internal:other": |
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153 return 0 |
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154 if tool == "internal:fail": |
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155 return 1 |
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156 |
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157 # do the actual merge |
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158 a = repo.wjoin(fd) |
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159 b = temp("base", fca) |
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160 c = temp("other", fco) |
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161 out = "" |
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162 back = a + ".orig" |
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163 util.copyfile(a, back) |
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164 |
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165 if orig != fco.path(): |
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166 repo.ui.status(_("merging %s and %s to %s\n") % (orig, fco.path(), fd)) |
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167 else: |
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168 repo.ui.status(_("merging %s\n") % fd) |
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169 |
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170 repo.ui.debug(_("my %s other %s ancestor %s\n") % (fcd, fco, fca)) |
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171 |
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172 # do we attempt to simplemerge first? |
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173 if _toolbool(ui, tool, "premerge", not (binary or symlink)): |
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174 r = simplemerge.simplemerge(ui, a, b, c, quiet=True) |
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175 if not r: |
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176 ui.debug(_(" premerge successful\n")) |
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177 os.unlink(back) |
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178 os.unlink(b) |
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179 os.unlink(c) |
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180 return 0 |
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181 util.copyfile(back, a) # restore from backup and try again |
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182 |
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183 env = dict(HG_FILE=fd, |
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184 HG_MY_NODE=short(mynode), |
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185 HG_OTHER_NODE=str(fco.changectx()), |
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186 HG_MY_ISLINK='l' in fcd.flags(), |
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187 HG_OTHER_ISLINK='l' in fco.flags(), |
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188 HG_BASE_ISLINK='l' in fca.flags()) |
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189 |
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190 if tool == "internal:merge": |
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191 r = simplemerge.simplemerge(ui, a, b, c, label=['local', 'other']) |
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192 else: |
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193 args = _toolstr(ui, tool, "args", '$local $base $other') |
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194 if "$output" in args: |
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195 out, a = a, back # read input from backup, write to original |
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196 replace = dict(local=a, base=b, other=c, output=out) |
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197 args = re.sub("\$(local|base|other|output)", |
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198 lambda x: '"%s"' % replace[x.group()[1:]], args) |
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199 r = util.system(toolpath + ' ' + args, cwd=repo.root, environ=env) |
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200 |
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201 if not r and _toolbool(ui, tool, "checkconflicts"): |
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202 if re.match("^(<<<<<<< .*|=======|>>>>>>> .*)$", fcd.data()): |
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203 r = 1 |
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204 |
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205 if not r and _toolbool(ui, tool, "checkchanged"): |
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206 if filecmp.cmp(repo.wjoin(fd), back): |
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207 if ui.prompt(_(" output file %s appears unchanged\n" |
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208 "was merge successful (yn)?") % fd, |
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209 (_("&Yes"), _("&No")), _("n")) != _("y"): |
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210 r = 1 |
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211 |
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212 if _toolbool(ui, tool, "fixeol"): |
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213 _matcheol(repo.wjoin(fd), back) |
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214 |
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215 if r: |
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216 repo.ui.warn(_("merging %s failed!\n") % fd) |
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217 else: |
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218 os.unlink(back) |
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219 |
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220 os.unlink(b) |
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221 os.unlink(c) |
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222 return r |