Mercurial > hg
annotate mercurial/filemerge.py @ 15657:d976b1ef6760
util: don't mess with builtins to emulate buffer()
author | Matt Mackall <mpm@selenic.com> |
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date | Thu, 15 Dec 2011 15:27:11 -0600 |
parents | 2371f4aea665 |
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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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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 _internal = ['internal:' + s |
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23 for s in 'fail local other merge prompt dump'.split()] |
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24 |
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25 def _findtool(ui, tool): |
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26 if tool in _internal: |
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27 return tool |
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28 for kn in ("regkey", "regkeyalt"): |
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29 k = _toolstr(ui, tool, kn) |
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30 if not k: |
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31 continue |
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32 p = util.lookupreg(k, _toolstr(ui, tool, "regname")) |
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33 if p: |
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34 p = util.findexe(p + _toolstr(ui, tool, "regappend")) |
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35 if p: |
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36 return p |
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37 exe = _toolstr(ui, tool, "executable", tool) |
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38 return util.findexe(util.expandpath(exe)) |
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39 |
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40 def _picktool(repo, ui, path, binary, symlink): |
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41 def check(tool, pat, symlink, binary): |
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42 tmsg = tool |
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43 if pat: |
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44 tmsg += " specified for " + pat |
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45 if not _findtool(ui, tool): |
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46 if pat: # explicitly requested tool deserves a warning |
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47 ui.warn(_("couldn't find merge tool %s\n") % tmsg) |
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48 else: # configured but non-existing tools are more silent |
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49 ui.note(_("couldn't find merge tool %s\n") % tmsg) |
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50 elif symlink and not _toolbool(ui, tool, "symlink"): |
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51 ui.warn(_("tool %s can't handle symlinks\n") % tmsg) |
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52 elif binary and not _toolbool(ui, tool, "binary"): |
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53 ui.warn(_("tool %s can't handle binary\n") % tmsg) |
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54 elif not util.gui() and _toolbool(ui, tool, "gui"): |
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55 ui.warn(_("tool %s requires a GUI\n") % tmsg) |
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56 else: |
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57 return True |
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58 return False |
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59 |
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60 # forcemerge comes from command line arguments, highest priority |
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61 force = ui.config('ui', 'forcemerge') |
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62 if force: |
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63 toolpath = _findtool(ui, force) |
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64 if toolpath: |
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65 return (force, '"' + toolpath + '"') |
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66 else: |
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67 # mimic HGMERGE if given tool not found |
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68 return (force, force) |
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69 |
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70 # HGMERGE takes next precedence |
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71 hgmerge = os.environ.get("HGMERGE") |
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72 if hgmerge: |
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73 return (hgmerge, hgmerge) |
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74 |
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75 # then patterns |
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76 for pat, tool in ui.configitems("merge-patterns"): |
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77 mf = match.match(repo.root, '', [pat]) |
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78 if mf(path) and check(tool, pat, symlink, False): |
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79 toolpath = _findtool(ui, tool) |
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80 return (tool, '"' + toolpath + '"') |
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81 |
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82 # then merge tools |
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83 tools = {} |
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84 for k, v in ui.configitems("merge-tools"): |
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85 t = k.split('.')[0] |
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86 if t not in tools: |
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87 tools[t] = int(_toolstr(ui, t, "priority", "0")) |
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88 names = tools.keys() |
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89 tools = sorted([(-p, t) for t, p in tools.items()]) |
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90 uimerge = ui.config("ui", "merge") |
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91 if uimerge: |
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92 if uimerge not in names: |
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93 return (uimerge, uimerge) |
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94 tools.insert(0, (None, uimerge)) # highest priority |
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95 tools.append((None, "hgmerge")) # the old default, if found |
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96 for p, t in tools: |
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97 if check(t, None, symlink, binary): |
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98 toolpath = _findtool(ui, t) |
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99 return (t, '"' + toolpath + '"') |
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100 # internal merge as last resort |
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101 return (not (symlink or binary) and "internal:merge" or None, None) |
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102 |
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103 def _eoltype(data): |
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104 "Guess the EOL type of a file" |
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105 if '\0' in data: # binary |
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106 return None |
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107 if '\r\n' in data: # Windows |
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108 return '\r\n' |
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109 if '\r' in data: # Old Mac |
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110 return '\r' |
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111 if '\n' in data: # UNIX |
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112 return '\n' |
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113 return None # unknown |
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114 |
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115 def _matcheol(file, origfile): |
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116 "Convert EOL markers in a file to match origfile" |
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117 tostyle = _eoltype(util.readfile(origfile)) |
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118 if tostyle: |
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119 data = util.readfile(file) |
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120 style = _eoltype(data) |
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121 if style: |
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122 newdata = data.replace(style, tostyle) |
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123 if newdata != data: |
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124 util.writefile(file, newdata) |
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125 |
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126 def filemerge(repo, mynode, orig, fcd, fco, fca): |
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127 """perform a 3-way merge in the working directory |
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128 |
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129 mynode = parent node before merge |
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130 orig = original local filename before merge |
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131 fco = other file context |
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132 fca = ancestor file context |
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133 fcd = local file context for current/destination file |
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134 """ |
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135 |
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136 def temp(prefix, ctx): |
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137 pre = "%s~%s." % (os.path.basename(ctx.path()), prefix) |
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138 (fd, name) = tempfile.mkstemp(prefix=pre) |
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139 data = repo.wwritedata(ctx.path(), ctx.data()) |
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140 f = os.fdopen(fd, "wb") |
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141 f.write(data) |
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142 f.close() |
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143 return name |
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144 |
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145 def isbin(ctx): |
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146 try: |
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147 return util.binary(ctx.data()) |
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148 except IOError: |
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149 return False |
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150 |
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151 if not fco.cmp(fcd): # files identical? |
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152 return None |
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153 |
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154 ui = repo.ui |
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155 fd = fcd.path() |
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156 binary = isbin(fcd) or isbin(fco) or isbin(fca) |
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157 symlink = 'l' in fcd.flags() + fco.flags() |
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158 tool, toolpath = _picktool(repo, ui, fd, binary, symlink) |
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159 ui.debug("picked tool '%s' for %s (binary %s symlink %s)\n" % |
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160 (tool, fd, binary, symlink)) |
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161 |
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162 if not tool or tool == 'internal:prompt': |
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163 tool = "internal:local" |
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164 if ui.promptchoice(_(" no tool found to merge %s\n" |
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165 "keep (l)ocal or take (o)ther?") % fd, |
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166 (_("&Local"), _("&Other")), 0): |
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167 tool = "internal:other" |
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168 if tool == "internal:local": |
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169 return 0 |
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170 if tool == "internal:other": |
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172 return 0 |
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173 if tool == "internal:fail": |
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174 return 1 |
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175 |
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176 # do the actual merge |
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177 a = repo.wjoin(fd) |
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178 b = temp("base", fca) |
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179 c = temp("other", fco) |
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180 out = "" |
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181 back = a + ".orig" |
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182 util.copyfile(a, back) |
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183 |
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184 if orig != fco.path(): |
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185 ui.status(_("merging %s and %s to %s\n") % (orig, fco.path(), fd)) |
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186 else: |
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187 ui.status(_("merging %s\n") % fd) |
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188 |
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189 ui.debug("my %s other %s ancestor %s\n" % (fcd, fco, fca)) |
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190 |
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191 # do we attempt to simplemerge first? |
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192 try: |
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193 premerge = _toolbool(ui, tool, "premerge", not (binary or symlink)) |
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194 except error.ConfigError: |
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195 premerge = _toolstr(ui, tool, "premerge").lower() |
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196 valid = 'keep'.split() |
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197 if premerge not in valid: |
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198 _valid = ', '.join(["'" + v + "'" for v in valid]) |
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199 raise error.ConfigError(_("%s.premerge not valid " |
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200 "('%s' is neither boolean nor %s)") % |
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201 (tool, premerge, _valid)) |
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202 |
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203 if premerge: |
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204 r = simplemerge.simplemerge(ui, a, b, c, quiet=True) |
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205 if not r: |
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206 ui.debug(" premerge successful\n") |
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207 os.unlink(back) |
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208 os.unlink(b) |
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209 os.unlink(c) |
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210 return 0 |
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211 if premerge != 'keep': |
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212 util.copyfile(back, a) # restore from backup and try again |
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213 |
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214 env = dict(HG_FILE=fd, |
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215 HG_MY_NODE=short(mynode), |
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216 HG_OTHER_NODE=str(fco.changectx()), |
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217 HG_BASE_NODE=str(fca.changectx()), |
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218 HG_MY_ISLINK='l' in fcd.flags(), |
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219 HG_OTHER_ISLINK='l' in fco.flags(), |
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220 HG_BASE_ISLINK='l' in fca.flags()) |
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221 |
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222 if tool == "internal:merge": |
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223 r = simplemerge.simplemerge(ui, a, b, c, label=['local', 'other']) |
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224 elif tool == 'internal:dump': |
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225 a = repo.wjoin(fd) |
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226 util.copyfile(a, a + ".local") |
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227 repo.wwrite(fd + ".other", fco.data(), fco.flags()) |
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228 repo.wwrite(fd + ".base", fca.data(), fca.flags()) |
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229 return 1 # unresolved |
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230 else: |
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231 args = _toolstr(ui, tool, "args", '$local $base $other') |
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232 if "$output" in args: |
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233 out, a = a, back # read input from backup, write to original |
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234 replace = dict(local=a, base=b, other=c, output=out) |
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235 args = util.interpolate(r'\$', replace, args, |
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236 lambda s: '"%s"' % util.localpath(s)) |
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237 r = util.system(toolpath + ' ' + args, cwd=repo.root, environ=env, |
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238 out=ui.fout) |
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239 |
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240 if not r and (_toolbool(ui, tool, "checkconflicts") or |
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241 'conflicts' in _toollist(ui, tool, "check")): |
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242 if re.search("^(<<<<<<< .*|=======|>>>>>>> .*)$", fcd.data(), |
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243 re.MULTILINE): |
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244 r = 1 |
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245 |
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246 checked = False |
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247 if 'prompt' in _toollist(ui, tool, "check"): |
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248 checked = True |
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249 if ui.promptchoice(_("was merge of '%s' successful (yn)?") % fd, |
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250 (_("&Yes"), _("&No")), 1): |
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251 r = 1 |
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252 |
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253 if not r and not checked and (_toolbool(ui, tool, "checkchanged") or |
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254 'changed' in _toollist(ui, tool, "check")): |
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255 if filecmp.cmp(repo.wjoin(fd), back): |
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256 if ui.promptchoice(_(" output file %s appears unchanged\n" |
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257 "was merge successful (yn)?") % fd, |
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258 (_("&Yes"), _("&No")), 1): |
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259 r = 1 |
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260 |
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261 if _toolbool(ui, tool, "fixeol"): |
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262 _matcheol(repo.wjoin(fd), back) |
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263 |
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264 if r: |
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265 if tool == "internal:merge": |
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266 ui.warn(_("merging %s incomplete! " |
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267 "(edit conflicts, then use 'hg resolve --mark')\n") % fd) |
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268 else: |
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269 ui.warn(_("merging %s failed!\n") % fd) |
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270 else: |
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271 os.unlink(back) |
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272 |
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273 os.unlink(b) |
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274 os.unlink(c) |
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275 return r |