Mercurial > hg
annotate mercurial/merge.py @ 6380:a632a9a57821
qclone: do not abort if remote hasn't enabled mq (issue1040)
author | Alexis S. L. Carvalho <alexis@cecm.usp.br> |
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date | Mon, 24 Mar 2008 16:17:19 -0300 |
parents | cdc458b12f0f |
children | 0b89315d5de2 |
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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, 2007 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 nullid, nullrev |
3891 | 9 from i18n import _ |
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10 import errno, util, os, filemerge, copies |
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11 |
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12 def _checkunknown(wctx, mctx): |
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13 "check for collisions between unknown files and files in mctx" |
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14 for f in wctx.unknown(): |
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15 if f in mctx and mctx[f].cmp(wctx[f].data()): |
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16 raise util.Abort(_("untracked file in working directory differs" |
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17 " from file in requested revision: '%s'") % f) |
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18 |
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19 def _checkcollision(mctx): |
3785 | 20 "check for case folding collisions in the destination context" |
21 folded = {} | |
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22 for fn in mctx: |
3785 | 23 fold = fn.lower() |
24 if fold in folded: | |
25 raise util.Abort(_("case-folding collision between %s and %s") | |
26 % (fn, folded[fold])) | |
27 folded[fold] = fn | |
28 | |
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29 def _forgetremoved(wctx, mctx, branchmerge): |
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30 """ |
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31 Forget removed files |
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32 |
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33 If we're jumping between revisions (as opposed to merging), and if |
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34 neither the working directory nor the target rev has the file, |
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35 then we need to remove it from the dirstate, to prevent the |
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36 dirstate from listing the file when it is no longer in the |
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37 manifest. |
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38 |
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39 If we're merging, and the other revision has removed a file |
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40 that is not present in the working directory, we need to mark it |
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41 as removed. |
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42 """ |
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43 |
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44 action = [] |
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45 state = branchmerge and 'r' or 'f' |
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46 for f in wctx.deleted(): |
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47 if f not in mctx: |
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48 action.append((f, state)) |
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49 |
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50 if not branchmerge: |
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51 for f in wctx.removed(): |
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52 if f not in mctx: |
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53 action.append((f, "f")) |
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54 |
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55 return action |
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56 |
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57 def manifestmerge(repo, p1, p2, pa, overwrite, partial): |
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58 """ |
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59 Merge p1 and p2 with ancestor ma and generate merge action list |
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60 |
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61 overwrite = whether we clobber working files |
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62 partial = function to filter file lists |
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63 """ |
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64 |
3314 | 65 repo.ui.note(_("resolving manifests\n")) |
66 repo.ui.debug(_(" overwrite %s partial %s\n") % (overwrite, bool(partial))) | |
67 repo.ui.debug(_(" ancestor %s local %s remote %s\n") % (pa, p1, p2)) | |
68 | |
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69 m1 = p1.manifest() |
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70 m2 = p2.manifest() |
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71 ma = pa.manifest() |
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72 backwards = (pa == p2) |
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74 copy, copied, diverge = {}, {}, {} |
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75 |
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76 def fmerge(f, f2=None, fa=None): |
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77 """merge flags""" |
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78 if not f2: |
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79 f2 = f |
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80 fa = f |
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81 a, m, n = ma.flags(fa), m1.flags(f), m2.flags(f2) |
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82 if m == n: # flags agree |
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83 return m # unchanged |
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84 if m and n: # flags are set but don't agree |
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85 if not a: # both differ from parent |
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86 r = repo.ui.prompt( |
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87 _(" conflicting flags for %s\n" |
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88 "(n)one, e(x)ec or sym(l)ink?") % f, "[nxl]", "n") |
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89 return r != "n" and r or '' |
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90 if m == a: |
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91 return n # changed from m to n |
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92 return m # changed from n to m |
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93 if m and m != a: # changed from a to m |
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94 return m |
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95 if n and n != a: # changed from a to n |
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96 return n |
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97 return '' # flag was cleared |
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98 |
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99 def act(msg, m, f, *args): |
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100 repo.ui.debug(" %s: %s -> %s\n" % (f, msg, m)) |
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101 action.append((f, m) + args) |
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102 |
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103 if pa and not (backwards or overwrite): |
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104 copy, diverge = copies.copies(repo, p1, p2, pa) |
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105 copied = dict.fromkeys(copy.values()) |
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106 for of, fl in diverge.items(): |
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107 act("divergent renames", "dr", of, fl) |
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108 |
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109 # Compare manifests |
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110 for f, n in m1.iteritems(): |
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111 if partial and not partial(f): |
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112 continue |
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113 if f in m2: |
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114 if overwrite or backwards: |
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115 rflags = m2.flags(f) |
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116 else: |
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117 rflags = fmerge(f) |
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118 # are files different? |
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119 if n != m2[f]: |
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120 a = ma.get(f, nullid) |
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121 # are we clobbering? |
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122 if overwrite: |
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123 act("clobbering", "g", f, rflags) |
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124 # or are we going back in time and clean? |
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125 elif backwards and not n[20:]: |
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126 act("reverting", "g", f, rflags) |
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127 # are both different from the ancestor? |
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128 elif n != a and m2[f] != a: |
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129 act("versions differ", "m", f, f, f, rflags, False) |
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130 # is remote's version newer? |
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131 elif m2[f] != a: |
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132 act("remote is newer", "g", f, rflags) |
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133 # local is newer, not overwrite, check mode bits |
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134 elif m1.flags(f) != rflags: |
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135 act("update permissions", "e", f, rflags) |
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136 # contents same, check mode bits |
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137 elif m1.flags(f) != rflags: |
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138 act("update permissions", "e", f, rflags) |
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139 elif f in copied: |
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140 continue |
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141 elif f in copy: |
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142 f2 = copy[f] |
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143 if f2 not in m2: # directory rename |
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144 act("remote renamed directory to " + f2, "d", |
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145 f, None, f2, m1.flags(f)) |
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146 elif f2 in m1: # case 2 A,B/B/B |
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147 act("local copied to " + f2, "m", |
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148 f, f2, f, fmerge(f, f2, f2), False) |
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149 else: # case 4,21 A/B/B |
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150 act("local moved to " + f2, "m", |
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151 f, f2, f, fmerge(f, f2, f2), False) |
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152 elif f in ma: |
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153 if n != ma[f] and not overwrite: |
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154 if repo.ui.prompt( |
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155 _(" local changed %s which remote deleted\n" |
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156 "use (c)hanged version or (d)elete?") % f, |
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157 _("[cd]"), _("c")) == _("d"): |
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158 act("prompt delete", "r", f) |
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159 else: |
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160 act("other deleted", "r", f) |
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161 else: |
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162 # file is created on branch or in working directory |
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163 if (overwrite and n[20:] != "u") or (backwards and not n[20:]): |
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164 act("remote deleted", "r", f) |
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165 |
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166 for f, n in m2.iteritems(): |
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167 if partial and not partial(f): |
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168 continue |
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169 if f in m1: |
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170 continue |
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171 if f in copied: |
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172 continue |
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173 if f in copy: |
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174 f2 = copy[f] |
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175 if f2 not in m1: # directory rename |
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176 act("local renamed directory to " + f2, "d", |
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177 None, f, f2, m2.flags(f)) |
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178 elif f2 in m2: # rename case 1, A/A,B/A |
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179 act("remote copied to " + f, "m", |
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180 f2, f, f, fmerge(f2, f, f2), False) |
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181 else: # case 3,20 A/B/A |
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182 act("remote moved to " + f, "m", |
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183 f2, f, f, fmerge(f2, f, f2), True) |
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184 elif f in ma: |
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185 if overwrite or backwards: |
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186 act("recreating", "g", f, m2.flags(f)) |
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187 elif n != ma[f]: |
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188 if repo.ui.prompt( |
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189 _("remote changed %s which local deleted\n" |
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190 "use (c)hanged version or leave (d)eleted?") % f, |
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191 _("[cd]"), _("c")) == _("c"): |
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192 act("prompt recreating", "g", f, m2.flags(f)) |
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193 else: |
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194 act("remote created", "g", f, m2.flags(f)) |
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195 |
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196 return action |
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197 |
3297
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198 def applyupdates(repo, action, wctx, mctx): |
3315
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199 "apply the merge action list to the working directory" |
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200 |
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201 updated, merged, removed, unresolved = 0, 0, 0, 0 |
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202 action.sort() |
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203 # prescan for copy/renames |
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204 for a in action: |
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205 f, m = a[:2] |
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206 if m == 'm': # merge |
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207 f2, fd, flags, move = a[2:] |
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208 if f != fd: |
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209 repo.ui.debug(_("copying %s to %s\n") % (f, fd)) |
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210 repo.wwrite(fd, repo.wread(f), flags) |
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211 |
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diff
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212 audit_path = util.path_auditor(repo.root) |
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213 |
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214 for a in action: |
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215 f, m = a[:2] |
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216 if f and f[0] == "/": |
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217 continue |
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218 if m == "r": # remove |
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219 repo.ui.note(_("removing %s\n") % f) |
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220 audit_path(f) |
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221 try: |
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222 util.unlink(repo.wjoin(f)) |
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223 except OSError, inst: |
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224 if inst.errno != errno.ENOENT: |
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225 repo.ui.warn(_("update failed to remove %s: %s!\n") % |
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226 (f, inst.strerror)) |
3673
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227 removed += 1 |
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228 elif m == "m": # merge |
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229 f2, fd, flags, move = a[2:] |
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230 r = filemerge.filemerge(repo, f, fd, f2, wctx, mctx) |
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231 if r > 0: |
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232 unresolved += 1 |
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233 else: |
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234 if r is None: |
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235 updated += 1 |
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236 else: |
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237 merged += 1 |
5704 | 238 util.set_flags(repo.wjoin(fd), flags) |
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239 if f != fd and move and util.lexists(repo.wjoin(f)): |
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240 repo.ui.debug(_("removing %s\n") % f) |
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241 os.unlink(repo.wjoin(f)) |
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242 elif m == "g": # get |
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243 flags = a[2] |
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244 repo.ui.note(_("getting %s\n") % f) |
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245 t = mctx.filectx(f).data() |
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246 repo.wwrite(f, t, flags) |
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247 updated += 1 |
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248 elif m == "d": # directory rename |
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249 f2, fd, flags = a[2:] |
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250 if f: |
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251 repo.ui.note(_("moving %s to %s\n") % (f, fd)) |
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252 t = wctx.filectx(f).data() |
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253 repo.wwrite(fd, t, flags) |
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254 util.unlink(repo.wjoin(f)) |
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255 if f2: |
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256 repo.ui.note(_("getting %s to %s\n") % (f2, fd)) |
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257 t = mctx.filectx(f2).data() |
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258 repo.wwrite(fd, t, flags) |
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259 updated += 1 |
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260 elif m == "dr": # divergent renames |
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261 fl = a[2] |
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262 repo.ui.warn("warning: detected divergent renames of %s to:\n" % f) |
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263 for nf in fl: |
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264 repo.ui.warn(" %s\n" % nf) |
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265 elif m == "e": # exec |
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266 flags = a[2] |
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268 |
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269 return updated, merged, removed, unresolved |
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270 |
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271 def recordupdates(repo, action, branchmerge): |
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272 "record merge actions to the dirstate" |
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273 |
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274 for a in action: |
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275 f, m = a[:2] |
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276 if m == "r": # remove |
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277 if branchmerge: |
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278 repo.dirstate.remove(f) |
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279 else: |
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280 repo.dirstate.forget(f) |
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281 elif m == "f": # forget |
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282 repo.dirstate.forget(f) |
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283 elif m in "ge": # get or exec change |
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284 if branchmerge: |
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285 repo.dirstate.normaldirty(f) |
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286 else: |
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287 repo.dirstate.normal(f) |
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288 elif m == "m": # merge |
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289 f2, fd, flag, move = a[2:] |
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290 if branchmerge: |
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291 # We've done a branch merge, mark this file as merged |
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292 # so that we properly record the merger later |
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293 repo.dirstate.merge(fd) |
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294 if f != f2: # copy/rename |
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295 if move: |
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296 repo.dirstate.remove(f) |
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297 if f != fd: |
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298 repo.dirstate.copy(f, fd) |
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299 else: |
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300 repo.dirstate.copy(f2, fd) |
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301 else: |
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302 # We've update-merged a locally modified file, so |
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303 # we set the dirstate to emulate a normal checkout |
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304 # of that file some time in the past. Thus our |
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305 # merge will appear as a normal local file |
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306 # modification. |
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307 repo.dirstate.normallookup(fd) |
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308 if move: |
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309 repo.dirstate.forget(f) |
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310 elif m == "d": # directory rename |
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311 f2, fd, flag = a[2:] |
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312 if not f2 and f not in repo.dirstate: |
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313 # untracked file moved |
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314 continue |
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315 if branchmerge: |
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316 repo.dirstate.add(fd) |
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317 if f: |
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318 repo.dirstate.remove(f) |
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319 repo.dirstate.copy(f, fd) |
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320 if f2: |
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321 repo.dirstate.copy(f2, fd) |
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322 else: |
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323 repo.dirstate.normal(fd) |
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324 if f: |
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325 repo.dirstate.forget(f) |
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326 |
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327 def update(repo, node, branchmerge, force, partial): |
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328 """ |
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329 Perform a merge between the working directory and the given node |
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330 |
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331 branchmerge = whether to merge between branches |
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332 force = whether to force branch merging or file overwriting |
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333 partial = a function to filter file lists (dirstate not updated) |
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334 """ |
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335 |
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336 wlock = repo.wlock() |
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337 try: |
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338 wc = repo.workingctx() |
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339 if node is None: |
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340 # tip of current branch |
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341 try: |
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342 node = repo.branchtags()[wc.branch()] |
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343 except KeyError: |
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344 if wc.branch() == "default": # no default branch! |
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345 node = repo.lookup("tip") # update to tip |
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346 else: |
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347 raise util.Abort(_("branch %s not found") % wc.branch()) |
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348 overwrite = force and not branchmerge |
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349 pl = wc.parents() |
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350 p1, p2 = pl[0], repo.changectx(node) |
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351 pa = p1.ancestor(p2) |
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352 fp1, fp2, xp1, xp2 = p1.node(), p2.node(), str(p1), str(p2) |
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353 fastforward = False |
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355 ### check phase |
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356 if not overwrite and len(pl) > 1: |
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357 raise util.Abort(_("outstanding uncommitted merges")) |
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358 if branchmerge: |
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359 if pa == p2: |
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360 raise util.Abort(_("can't merge with ancestor")) |
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361 elif pa == p1: |
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362 if p1.branch() != p2.branch(): |
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363 fastforward = True |
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364 else: |
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365 raise util.Abort(_("nothing to merge (use 'hg update'" |
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366 " or check 'hg heads')")) |
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367 if not force and (wc.files() or wc.deleted()): |
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368 raise util.Abort(_("outstanding uncommitted changes")) |
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369 elif not overwrite: |
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370 if pa == p1 or pa == p2: # linear |
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371 pass # all good |
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372 elif p1.branch() == p2.branch(): |
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373 if wc.files() or wc.deleted(): |
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374 raise util.Abort(_("crosses branches (use 'hg merge' or " |
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375 "'hg update -C' to discard changes)")) |
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376 raise util.Abort(_("crosses branches (use 'hg merge'" |
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377 "or 'hg update -C')")) |
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378 elif wc.files() or wc.deleted(): |
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379 raise util.Abort(_("crosses named branches (use " |
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380 "'hg update -C' to discard changes)")) |
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381 else: |
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382 # Allow jumping branches if there are no changes |
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383 overwrite = True |
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384 |
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385 ### calculate phase |
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386 action = [] |
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387 if not force: |
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388 _checkunknown(wc, p2) |
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389 if not util.checkfolding(repo.path): |
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390 _checkcollision(p2) |
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391 action += _forgetremoved(wc, p2, branchmerge) |
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392 action += manifestmerge(repo, wc, p2, pa, overwrite, partial) |
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393 |
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394 ### apply phase |
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395 if not branchmerge: # just jump to the new rev |
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396 fp1, fp2, xp1, xp2 = fp2, nullid, xp2, '' |
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397 if not partial: |
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398 repo.hook('preupdate', throw=True, parent1=xp1, parent2=xp2) |
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399 |
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400 stats = applyupdates(repo, action, wc, p2) |
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401 |
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402 if not partial: |
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403 recordupdates(repo, action, branchmerge) |
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404 repo.dirstate.setparents(fp1, fp2) |
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405 if not branchmerge and not fastforward: |
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406 repo.dirstate.setbranch(p2.branch()) |
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407 repo.hook('update', parent1=xp1, parent2=xp2, error=stats[3]) |
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409 return stats |
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410 finally: |
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411 del wlock |