Mercurial > hg > mercurial-crew-with-dirclash

annotate mercurial/merge.py @ 3240:8d4855fd9d7b

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merge: use new working context object in update
author Matt Mackall <mpm@selenic.com>
date Tue, 03 Oct 2006 01:21:46 -0500
parents cac7be0b9b99
children 7a0d70b69d74
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1 # merge.py - directory-level update/merge handling for Mercurial
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2 #
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3 # Copyright 2006 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 gettext as _
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10 from demandload import *
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11 demandload(globals(), "errno util os tempfile")
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12
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13 def filemerge(repo, fw, fo, fd, my, other, p1, p2, move):
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14 """perform a 3-way merge in the working directory
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15
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16 fw = filename in the working directory and first parent
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17 fo = filename in other parent
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18 fd = destination filename
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19 my = fileid in first parent
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20 other = fileid in second parent
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21 p1, p2 = hex changeset ids for merge command
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22 move = whether to move or copy the file to the destination
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23
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24 TODO:
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25 if fw is copied in the working directory, we get confused
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26 implement move and fd
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27 """
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28
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29 def temp(prefix, ctx):
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30 pre = "%s~%s." % (os.path.basename(ctx.path()), prefix)
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31 (fd, name) = tempfile.mkstemp(prefix=pre)
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32 f = os.fdopen(fd, "wb")
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33 repo.wwrite(ctx.path(), ctx.data(), f)
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34 f.close()
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35 return name
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36
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37 fcm = repo.filectx(fw, fileid=my)
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38 fco = repo.filectx(fo, fileid=other)
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39 fca = fcm.ancestor(fco)
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40 if not fca:
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41 fca = repo.filectx(fw, fileid=-1)
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42 a = repo.wjoin(fw)
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43 b = temp("base", fca)
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44 c = temp("other", fco)
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45
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46 repo.ui.note(_("resolving %s\n") % fw)
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47 repo.ui.debug(_("my %s other %s ancestor %s\n") % (fcm, fco, fca))
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48
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49 cmd = (os.environ.get("HGMERGE") or repo.ui.config("ui", "merge")
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50 or "hgmerge")
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51 r = util.system('%s "%s" "%s" "%s"' % (cmd, a, b, c), cwd=repo.root,
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52 environ={'HG_FILE': fw,
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53 'HG_MY_NODE': p1,
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54 'HG_OTHER_NODE': p2})
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55 if r:
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56 repo.ui.warn(_("merging %s failed!\n") % fw)
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57
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58 os.unlink(b)
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59 os.unlink(c)
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60 return r
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61
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62 def checkunknown(repo, m2, wctx):
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63 """
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64 check for collisions between unknown files and files in m2
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65 """
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66 for f in wctx.unknown():
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67 if f in m2:
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68 if repo.file(f).cmp(m2[f], repo.wread(f)):
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69 raise util.Abort(_("'%s' already exists in the working"
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70 " dir and differs from remote") % f)
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71
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72 def forgetremoved(m2, wctx):
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73 """
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74 Forget removed files
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75
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76 If we're jumping between revisions (as opposed to merging), and if
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77 neither the working directory nor the target rev has the file,
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78 then we need to remove it from the dirstate, to prevent the
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79 dirstate from listing the file when it is no longer in the
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80 manifest.
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81 """
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82
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83 action = []
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84
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85 for f in wctx.deleted() + wctx.removed():
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86 if f not in m2:
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87 action.append((f, "f"))
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88
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89 return action
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90
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91 def nonoverlap(d1, d2):
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92 """
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93 Return list of elements in d1 not in d2
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94 """
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95
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96 l = []
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97 for d in d1:
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98 if d not in d2:
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99 l.append(d)
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100
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101 l.sort()
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102 return l
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103
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104 def findold(fctx, limit):
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105 """
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106 find files that path was copied from, back to linkrev limit
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107 """
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108
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109 old = {}
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110 orig = fctx.path()
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111 visit = [fctx]
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112 while visit:
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113 fc = visit.pop()
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114 if fc.rev() < limit:
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115 continue
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116 if fc.path() != orig and fc.path() not in old:
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117 old[fc.path()] = 1
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118 visit += fc.parents()
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119
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120 old = old.keys()
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121 old.sort()
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122 return old
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123
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124 def findcopies(repo, m1, m2, limit):
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125 """
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126 Find moves and copies between m1 and m2 back to limit linkrev
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127 """
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128
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129 # avoid silly behavior for update from empty dir
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130 if not m1:
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131 return {}
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132
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133 dcopies = repo.dirstate.copies()
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134 copy = {}
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135 match = {}
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136 u1 = nonoverlap(m1, m2)
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137 u2 = nonoverlap(m2, m1)
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138 ctx = util.cachefunc(lambda f,n: repo.filectx(f, fileid=n[:20]))
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139
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140 def checkpair(c, f2, man):
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141 ''' check if an apparent pair actually matches '''
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142 c2 = ctx(f2, man[f2])
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143 ca = c.ancestor(c2)
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144 if ca:
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145 copy[c.path()] = f2
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146 copy[f2] = c.path()
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147
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148 for f in u1:
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149 c = ctx(dcopies.get(f, f), m1[f])
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150 for of in findold(c, limit):
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151 if of in m2:
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152 checkpair(c, of, m2)
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153 else:
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diff changeset
154 match.setdefault(of, []).append(f)
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155
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156 for f in u2:
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diff changeset
157 c = ctx(f, m2[f])
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diff changeset
158 for of in findold(c, limit):
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diff changeset
159 if of in m1:
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diff changeset
160 checkpair(c, of, m1)
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diff changeset
161 elif of in match:
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diff changeset
162 for mf in match[of]:
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diff changeset
163 checkpair(c, mf, m1)
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164
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diff changeset
165 return copy
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166
3163
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diff changeset
167 def filtermanifest(man, partial):
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168 if partial:
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diff changeset
169 for k in man.keys():
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diff changeset
170 if not partial(k): del man[k]
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171
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diff changeset
172 def manifestmerge(ui, m1, m2, ma, overwrite, backwards):
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173 """
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diff changeset
174 Merge manifest m1 with m2 using ancestor ma and generate merge action list
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175 """
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176
3119
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diff changeset
177 def fmerge(f):
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178 """merge executable flags"""
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diff changeset
179 a, b, c = ma.execf(f), m1.execf(f), m2.execf(f)
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diff changeset
180 return ((a^b) | (a^c)) ^ a
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181
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182 action = []
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183
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184 def act(msg, f, m, *args):
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185 ui.debug(" %s: %s -> %s\n" % (f, msg, m))
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diff changeset
186 action.append((f, m) + args)
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187
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188 # Compare manifests
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189 for f, n in m1.iteritems():
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diff changeset
190 if f in m2:
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191 # are files different?
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diff changeset
192 if n != m2[f]:
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diff changeset
193 a = ma.get(f, nullid)
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diff changeset
194 # are both different from the ancestor?
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diff changeset
195 if not overwrite and n != a and m2[f] != a:
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diff changeset
196 act("versions differ", f, "m", fmerge(f), n[:20], m2[f])
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diff changeset
197 # are we clobbering?
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198 # is remote's version newer?
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199 # or are we going back in time and clean?
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diff changeset
200 elif overwrite or m2[f] != a or (backwards and not n[20:]):
3122
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diff changeset
201 act("remote is newer", f, "g", m2.execf(f), m2[f])
3114
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diff changeset
202 # local is newer, not overwrite, check mode bits
3119
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diff changeset
203 elif fmerge(f) != m1.execf(f):
3122
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diff changeset
204 act("update permissions", f, "e", m2.execf(f))
3114
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diff changeset
205 # contents same, check mode bits
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parents: 3113
diff changeset
206 elif m1.execf(f) != m2.execf(f):
3121
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parents: 3120
diff changeset
207 if overwrite or fmerge(f) != m1.execf(f):
3122
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diff changeset
208 act("update permissions", f, "e", m2.execf(f))
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diff changeset
209 del m2[f]
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diff changeset
210 elif f in ma:
3118
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parents: 3117
diff changeset
211 if n != ma[f] and not overwrite:
3120
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diff changeset
212 if ui.prompt(
3118
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diff changeset
213 (_(" local changed %s which remote deleted\n") % f) +
3120
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diff changeset
214 _("(k)eep or (d)elete?"), _("[kd]"), _("k")) == _("d"):
3122
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diff changeset
215 act("prompt delete", f, "r")
3106
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diff changeset
216 else:
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diff changeset
217 act("other deleted", f, "r")
3106
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218 else:
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diff changeset
219 # file is created on branch or in working directory
3121
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diff changeset
220 if (overwrite and n[20:] != "u") or (backwards and not n[20:]):
3122
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diff changeset
221 act("remote deleted", f, "r")
3106
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diff changeset
222
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diff changeset
223 for f, n in m2.iteritems():
3116
bb74f809bc95 merge: reorder tests on m2 items in manifestmerge
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diff changeset
224 if f in ma:
3117
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diff changeset
225 if overwrite or backwards:
3122
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diff changeset
226 act("recreating", f, "g", m2.execf(f), n)
3117
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diff changeset
227 elif n != ma[f]:
3120
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diff changeset
228 if ui.prompt(
3117
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diff changeset
229 (_("remote changed %s which local deleted\n") % f) +
3120
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diff changeset
230 _("(k)eep or (d)elete?"), _("[kd]"), _("k")) == _("k"):
3122
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parents: 3121
diff changeset
231 act("prompt recreating", f, "g", m2.execf(f), n)
3116
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diff changeset
232 else:
3122
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diff changeset
233 act("remote created", f, "g", m2.execf(f), n)
3106
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diff changeset
234
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diff changeset
235 return action
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diff changeset
236
3112
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diff changeset
237 def applyupdates(repo, action, xp1, xp2):
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parents: 3111
diff changeset
238 updated, merged, removed, unresolved = 0, 0, 0, 0
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diff changeset
239 action.sort()
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diff changeset
240 for a in action:
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parents: 3111
diff changeset
241 f, m = a[:2]
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parents: 3111
diff changeset
242 if f[0] == "/":
5cc62d99b785 merge: move apply and dirstate code into separate functions
Matt Mackall <mpm@selenic.com>
parents: 3111
diff changeset
243 continue
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Matt Mackall <mpm@selenic.com>
parents: 3111
diff changeset
244 if m == "r": # remove
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parents: 3111
diff changeset
245 repo.ui.note(_("removing %s\n") % f)
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parents: 3111
diff changeset
246 util.audit_path(f)
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parents: 3111
diff changeset
247 try:
5cc62d99b785 merge: move apply and dirstate code into separate functions
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diff changeset
248 util.unlink(repo.wjoin(f))
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parents: 3111
diff changeset
249 except OSError, inst:
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diff changeset
250 if inst.errno != errno.ENOENT:
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parents: 3111
diff changeset
251 repo.ui.warn(_("update failed to remove %s: %s!\n") %
5cc62d99b785 merge: move apply and dirstate code into separate functions
Matt Mackall <mpm@selenic.com>
parents: 3111
diff changeset
252 (f, inst.strerror))
5cc62d99b785 merge: move apply and dirstate code into separate functions
Matt Mackall <mpm@selenic.com>
parents: 3111
diff changeset
253 removed +=1
5cc62d99b785 merge: move apply and dirstate code into separate functions
Matt Mackall <mpm@selenic.com>
parents: 3111
diff changeset
254 elif m == "m": # merge
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parents: 3111
diff changeset
255 flag, my, other = a[2:]
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parents: 3111
diff changeset
256 repo.ui.status(_("merging %s\n") % f)
3234
cac7be0b9b99 merge: remove old merge function
Matt Mackall <mpm@selenic.com>
parents: 3233
diff changeset
257 if filemerge(repo, f, f, f, my, other, xp1, xp2, False):
3112
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parents: 3111
diff changeset
258 unresolved += 1
5cc62d99b785 merge: move apply and dirstate code into separate functions
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parents: 3111
diff changeset
259 util.set_exec(repo.wjoin(f), flag)
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Matt Mackall <mpm@selenic.com>
parents: 3111
diff changeset
260 merged += 1
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parents: 3111
diff changeset
261 elif m == "g": # get
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Matt Mackall <mpm@selenic.com>
parents: 3111
diff changeset
262 flag, node = a[2:]
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Matt Mackall <mpm@selenic.com>
parents: 3111
diff changeset
263 repo.ui.note(_("getting %s\n") % f)
5cc62d99b785 merge: move apply and dirstate code into separate functions
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parents: 3111
diff changeset
264 t = repo.file(f).read(node)
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parents: 3111
diff changeset
265 repo.wwrite(f, t)
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parents: 3111
diff changeset
266 util.set_exec(repo.wjoin(f), flag)
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Matt Mackall <mpm@selenic.com>
parents: 3111
diff changeset
267 updated += 1
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parents: 3111
diff changeset
268 elif m == "e": # exec
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parents: 3111
diff changeset
269 flag = a[2:]
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diff changeset
270 util.set_exec(repo.wjoin(f), flag)
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parents: 3111
diff changeset
271
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parents: 3111
diff changeset
272 return updated, merged, removed, unresolved
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diff changeset
273
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diff changeset
274 def recordupdates(repo, action, branchmerge):
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diff changeset
275 for a in action:
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parents: 3111
diff changeset
276 f, m = a[:2]
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diff changeset
277 if m == "r": # remove
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parents: 3111
diff changeset
278 if branchmerge:
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parents: 3111
diff changeset
279 repo.dirstate.update([f], 'r')
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parents: 3111
diff changeset
280 else:
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parents: 3111
diff changeset
281 repo.dirstate.forget([f])
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Matt Mackall <mpm@selenic.com>
parents: 3111
diff changeset
282 elif m == "f": # forget
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parents: 3111
diff changeset
283 repo.dirstate.forget([f])
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Matt Mackall <mpm@selenic.com>
parents: 3111
diff changeset
284 elif m == "g": # get
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parents: 3111
diff changeset
285 if branchmerge:
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parents: 3111
diff changeset
286 repo.dirstate.update([f], 'n', st_mtime=-1)
5cc62d99b785 merge: move apply and dirstate code into separate functions
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parents: 3111
diff changeset
287 else:
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parents: 3111
diff changeset
288 repo.dirstate.update([f], 'n')
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parents: 3111
diff changeset
289 elif m == "m": # merge
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parents: 3111
diff changeset
290 flag, my, other = a[2:]
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parents: 3111
diff changeset
291 if branchmerge:
5cc62d99b785 merge: move apply and dirstate code into separate functions
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parents: 3111
diff changeset
292 # We've done a branch merge, mark this file as merged
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Matt Mackall <mpm@selenic.com>
parents: 3111
diff changeset
293 # so that we properly record the merger later
5cc62d99b785 merge: move apply and dirstate code into separate functions
Matt Mackall <mpm@selenic.com>
parents: 3111
diff changeset
294 repo.dirstate.update([f], 'm')
5cc62d99b785 merge: move apply and dirstate code into separate functions
Matt Mackall <mpm@selenic.com>
parents: 3111
diff changeset
295 else:
5cc62d99b785 merge: move apply and dirstate code into separate functions
Matt Mackall <mpm@selenic.com>
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diff changeset
296 # We've update-merged a locally modified file, so
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297 # we set the dirstate to emulate a normal checkout
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298 # of that file some time in the past. Thus our
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299 # merge will appear as a normal local file
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300 # modification.
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301 fl = repo.file(f)
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302 f_len = fl.size(fl.rev(other))
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303 repo.dirstate.update([f], 'n', st_size=f_len, st_mtime=-1)
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304
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305 def update(repo, node, branchmerge=False, force=False, partial=None,
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306 wlock=None, show_stats=True, remind=True):
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307
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308 overwrite = force and not branchmerge
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309 forcemerge = force and branchmerge
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310
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311 if not wlock:
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312 wlock = repo.wlock()
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313
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314 ### check phase
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315
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316 wc = repo.workingctx()
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317 pl = wc.parents()
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318 if not overwrite and len(pl) > 1:
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319 raise util.Abort(_("outstanding uncommitted merges"))
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320
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321 p1, p2 = pl[0], repo.changectx(node)
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322 pa = p1.ancestor(p2)
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323
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324 # are we going backwards?
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325 backwards = (pa == p2)
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326
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327 # is there a linear path from p1 to p2?
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328 if pa == p1 or pa == p2:
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329 if branchmerge:
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330 raise util.Abort(_("there is nothing to merge, just use "
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331 "'hg update' or look at 'hg heads'"))
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332 elif not (overwrite or branchmerge):
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333 raise util.Abort(_("update spans branches, use 'hg merge' "
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334 "or 'hg update -C' to lose changes"))
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335
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336 if branchmerge and not forcemerge:
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337 if wc.modified() or wc.added() or wc.removed():
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338 raise util.Abort(_("outstanding uncommitted changes"))
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339
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340 m1 = wc.manifest().copy()
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341 m2 = p2.manifest().copy()
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342 ma = pa.manifest()
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343
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344 # resolve the manifest to determine which files
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345 # we care about merging
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346 repo.ui.note(_("resolving manifests\n"))
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347 repo.ui.debug(_(" overwrite %s branchmerge %s partial %s\n") %
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348 (overwrite, branchmerge, bool(partial)))
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349 repo.ui.debug(_(" ancestor %s local %s remote %s\n") % (p1, p2, pa))
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350
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351 action = []
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352 copy = {}
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353
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354 filtermanifest(m1, partial)
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355 filtermanifest(m2, partial)
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356
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357 if not force:
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358 checkunknown(repo, m2, wc)
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359 if not branchmerge:
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360 action += forgetremoved(m2, wc)
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361 if not (backwards or overwrite):
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362 copy = findcopies(repo, m1, m2, pa.rev())
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diff changeset
363
3163
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364 action += manifestmerge(repo.ui, m1, m2, ma, overwrite, backwards)
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365 del m1, m2, ma
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366
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367 ### apply phase
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368
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369 if not branchmerge:
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370 # we don't need to do any magic, just jump to the new rev
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371 p1, p2 = p2, repo.changectx(nullid)
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372
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373 xp1, xp2 = str(p1), str(p2)
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374 if not p2: xp2 = ''
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375
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376 repo.hook('preupdate', throw=True, parent1=xp1, parent2=xp2)
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377
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378 updated, merged, removed, unresolved = applyupdates(repo, action, xp1, xp2)
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379
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380 # update dirstate
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381 if not partial:
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382 repo.dirstate.setparents(p1.node(), p2.node())
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diff changeset
383 recordupdates(repo, action, branchmerge)
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384
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385 if show_stats:
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diff changeset
386 stats = ((updated, _("updated")),
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diff changeset
387 (merged - unresolved, _("merged")),
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388 (removed, _("removed")),
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389 (unresolved, _("unresolved")))
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390 note = ", ".join([_("%d files %s") % s for s in stats])
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391 repo.ui.status("%s\n" % note)
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392 if not partial:
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393 if branchmerge:
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394 if unresolved:
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395 repo.ui.status(_("There are unresolved merges,"
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396 " you can redo the full merge using:\n"
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397 " hg update -C %s\n"
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398 " hg merge %s\n"
3200
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399 % (p1.rev(), p2.rev())))
2803
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diff changeset
400 elif remind:
2799
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401 repo.ui.status(_("(branch merge, don't forget to commit)\n"))
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diff changeset
402 elif unresolved:
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diff changeset
403 repo.ui.status(_("There are unresolved merges with"
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diff changeset
404 " locally modified files.\n"))
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parents:
diff changeset
405
3110
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diff changeset
406 repo.hook('update', parent1=xp1, parent2=xp2, error=unresolved)
3096
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diff changeset
407 return unresolved
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408