Mercurial > hg
annotate mercurial/merge.py @ 12727:52971985be14
backout: provide linear backout as a default (without --merge option)
This changes backouts changeset to retain linear history, .e. it is committed
as a child of the working directory parent, not the reverted changeset
parent.
The default behavior was previously to just commit a reverted change as a
child of the backed out changeset - thus creating a new head. Most of
the time, you would use the --merge option, as it does not make sense to
keep this dangling head as is.
The previous behavior could be obtained by using 'hg update --clean .' after a
'hg backout --merge'.
The --merge option itself is not affected by this change. There is also
still an autocommit of the backout if a merge is not needed, i.e. in case
the backout is the parent of the working directory.
Previously we had (pwd = parent of the working directory):
pwd older
backout auto merge
backout --merge auto commit
With the new linear approach:
pwd older
backout auto commit
backout --merge auto commit
auto: commit done by the backout command
merge: backout also already committed but explicit merge and commit needed
commit: user need to commit the update/merge
author | Gilles Moris <gilles.moris@free.fr> |
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date | Fri, 10 Sep 2010 10:28:18 +0200 |
parents | bc13e17067d9 |
children | 8b438cb84c57 |
rev | line source |
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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 of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
6518 | 8 from node import nullid, nullrev, hex, bin |
3891 | 9 from i18n import _ |
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10 import util, filemerge, copies, subrepo |
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11 import errno, os, shutil |
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12 |
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13 class mergestate(object): |
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14 '''track 3-way merge state of individual files''' |
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15 def __init__(self, repo): |
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16 self._repo = repo |
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17 self._dirty = False |
6518 | 18 self._read() |
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19 def reset(self, node=None): |
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20 self._state = {} |
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21 if node: |
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22 self._local = node |
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23 shutil.rmtree(self._repo.join("merge"), True) |
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24 self._dirty = False |
6518 | 25 def _read(self): |
26 self._state = {} | |
27 try: | |
28 f = self._repo.opener("merge/state") | |
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29 for i, l in enumerate(f): |
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30 if i == 0: |
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31 self._local = bin(l[:-1]) |
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32 else: |
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33 bits = l[:-1].split("\0") |
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34 self._state[bits[0]] = bits[1:] |
6518 | 35 except IOError, err: |
36 if err.errno != errno.ENOENT: | |
37 raise | |
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38 self._dirty = False |
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39 def commit(self): |
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40 if self._dirty: |
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41 f = self._repo.opener("merge/state", "w") |
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42 f.write(hex(self._local) + "\n") |
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43 for d, v in self._state.iteritems(): |
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44 f.write("\0".join([d] + v) + "\n") |
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45 self._dirty = False |
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46 def add(self, fcl, fco, fca, fd, flags): |
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47 hash = util.sha1(fcl.path()).hexdigest() |
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48 self._repo.opener("merge/" + hash, "w").write(fcl.data()) |
6518 | 49 self._state[fd] = ['u', hash, fcl.path(), fca.path(), |
50 hex(fca.filenode()), fco.path(), flags] | |
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51 self._dirty = True |
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52 def __contains__(self, dfile): |
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53 return dfile in self._state |
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54 def __getitem__(self, dfile): |
6518 | 55 return self._state[dfile][0] |
56 def __iter__(self): | |
57 l = self._state.keys() | |
58 l.sort() | |
59 for f in l: | |
60 yield f | |
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61 def mark(self, dfile, state): |
6518 | 62 self._state[dfile][0] = state |
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63 self._dirty = True |
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64 def resolve(self, dfile, wctx, octx): |
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65 if self[dfile] == 'r': |
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66 return 0 |
6518 | 67 state, hash, lfile, afile, anode, ofile, flags = self._state[dfile] |
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68 f = self._repo.opener("merge/" + hash) |
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69 self._repo.wwrite(dfile, f.read(), flags) |
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70 fcd = wctx[dfile] |
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71 fco = octx[ofile] |
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72 fca = self._repo.filectx(afile, fileid=anode) |
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73 r = filemerge.filemerge(self._repo, self._local, lfile, fcd, fco, fca) |
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74 if not r: |
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75 self.mark(dfile, 'r') |
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76 return r |
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77 |
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78 def _checkunknown(wctx, mctx): |
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79 "check for collisions between unknown files and files in mctx" |
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80 for f in wctx.unknown(): |
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81 if f in mctx and mctx[f].cmp(wctx[f]): |
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82 raise util.Abort(_("untracked file in working directory differs" |
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83 " from file in requested revision: '%s'") % f) |
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84 |
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85 def _checkcollision(mctx): |
3785 | 86 "check for case folding collisions in the destination context" |
87 folded = {} | |
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88 for fn in mctx: |
3785 | 89 fold = fn.lower() |
90 if fold in folded: | |
91 raise util.Abort(_("case-folding collision between %s and %s") | |
92 % (fn, folded[fold])) | |
93 folded[fold] = fn | |
94 | |
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95 def _forgetremoved(wctx, mctx, branchmerge): |
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96 """ |
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97 Forget removed files |
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98 |
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99 If we're jumping between revisions (as opposed to merging), and if |
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100 neither the working directory nor the target rev has the file, |
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101 then we need to remove it from the dirstate, to prevent the |
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102 dirstate from listing the file when it is no longer in the |
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103 manifest. |
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104 |
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105 If we're merging, and the other revision has removed a file |
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106 that is not present in the working directory, we need to mark it |
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107 as removed. |
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108 """ |
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109 |
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110 action = [] |
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111 state = branchmerge and 'r' or 'f' |
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112 for f in wctx.deleted(): |
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113 if f not in mctx: |
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114 action.append((f, state)) |
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115 |
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116 if not branchmerge: |
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117 for f in wctx.removed(): |
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118 if f not in mctx: |
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119 action.append((f, "f")) |
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120 |
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121 return action |
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122 |
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123 def manifestmerge(repo, p1, p2, pa, overwrite, partial): |
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124 """ |
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125 Merge p1 and p2 with ancestor pa and generate merge action list |
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126 |
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127 overwrite = whether we clobber working files |
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128 partial = function to filter file lists |
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129 """ |
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130 |
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131 def fmerge(f, f2, fa): |
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132 """merge flags""" |
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133 a, m, n = ma.flags(fa), m1.flags(f), m2.flags(f2) |
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134 if m == n: # flags agree |
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135 return m # unchanged |
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136 if m and n and not a: # flags set, don't agree, differ from parent |
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137 r = repo.ui.promptchoice( |
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138 _(" conflicting flags for %s\n" |
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139 "(n)one, e(x)ec or sym(l)ink?") % f, |
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140 (_("&None"), _("E&xec"), _("Sym&link")), 0) |
10282
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141 if r == 1: |
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142 return "x" # Exec |
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143 if r == 2: |
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144 return "l" # Symlink |
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145 return "" |
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146 if m and m != a: # changed from a to m |
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147 return m |
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148 if n and n != a: # changed from a to n |
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149 return n |
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150 return '' # flag was cleared |
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151 |
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152 def act(msg, m, f, *args): |
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153 repo.ui.debug(" %s: %s -> %s\n" % (f, msg, m)) |
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154 action.append((f, m) + args) |
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155 |
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156 action, copy = [], {} |
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157 |
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158 if overwrite: |
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159 pa = p1 |
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160 elif pa == p2: # backwards |
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161 pa = p1.p1() |
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162 elif pa and repo.ui.configbool("merge", "followcopies", True): |
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163 dirs = repo.ui.configbool("merge", "followdirs", True) |
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164 copy, diverge = copies.copies(repo, p1, p2, pa, dirs) |
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165 for of, fl in diverge.iteritems(): |
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166 act("divergent renames", "dr", of, fl) |
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167 |
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168 repo.ui.note(_("resolving manifests\n")) |
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do not attempt to translate ui.debug output
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169 repo.ui.debug(" overwrite %s partial %s\n" % (overwrite, bool(partial))) |
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170 repo.ui.debug(" ancestor %s local %s remote %s\n" % (pa, p1, p2)) |
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171 |
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172 m1, m2, ma = p1.manifest(), p2.manifest(), pa.manifest() |
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173 copied = set(copy.values()) |
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174 |
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175 if '.hgsubstate' in m1: |
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176 # check whether sub state is modified |
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177 for s in p1.substate: |
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178 if p1.sub(s).dirty(): |
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179 m1['.hgsubstate'] += "+" |
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180 break |
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181 |
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182 # Compare manifests |
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183 for f, n in m1.iteritems(): |
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184 if partial and not partial(f): |
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185 continue |
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186 if f in m2: |
8735 | 187 rflags = fmerge(f, f, f) |
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188 a = ma.get(f, nullid) |
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189 if n == m2[f] or m2[f] == a: # same or local newer |
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190 # is file locally modified or flags need changing? |
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191 # dirstate flags may need to be made current |
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192 if m1.flags(f) != rflags or n[20:]: |
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193 act("update permissions", "e", f, rflags) |
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194 elif n == a: # remote newer |
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195 act("remote is newer", "g", f, rflags) |
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196 else: # both changed |
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197 act("versions differ", "m", f, f, f, rflags, False) |
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198 elif f in copied: # files we'll deal with on m2 side |
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199 pass |
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200 elif f in copy: |
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201 f2 = copy[f] |
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202 if f2 not in m2: # directory rename |
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203 act("remote renamed directory to " + f2, "d", |
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204 f, None, f2, m1.flags(f)) |
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205 else: # case 2 A,B/B/B or case 4,21 A/B/B |
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206 act("local copied/moved to " + f2, "m", |
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207 f, f2, f, fmerge(f, f2, f2), False) |
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208 elif f in ma: # clean, a different, no remote |
8739
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diff
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209 if n != ma[f]: |
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210 if repo.ui.promptchoice( |
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Fix misleading error and prompts during update/merge (issue556)
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diff
changeset
|
211 _(" local changed %s which remote deleted\n" |
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Fix misleading error and prompts during update/merge (issue556)
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212 "use (c)hanged version or (d)elete?") % f, |
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213 (_("&Changed"), _("&Delete")), 0): |
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214 act("prompt delete", "r", f) |
8736 | 215 else: |
216 act("prompt keep", "a", f) | |
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217 elif n[20:] == "a": # added, no remote |
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218 act("remote deleted", "f", f) |
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219 elif n[20:] != "u": |
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220 act("other deleted", "r", f) |
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221 |
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222 for f, n in m2.iteritems(): |
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223 if partial and not partial(f): |
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224 continue |
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225 if f in m1 or f in copied: # files already visited |
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226 continue |
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227 if f in copy: |
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228 f2 = copy[f] |
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229 if f2 not in m1: # directory rename |
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230 act("local renamed directory to " + f2, "d", |
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231 None, f, f2, m2.flags(f)) |
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232 elif f2 in m2: # rename case 1, A/A,B/A |
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233 act("remote copied to " + f, "m", |
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234 f2, f, f, fmerge(f2, f, f2), False) |
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235 else: # case 3,20 A/B/A |
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236 act("remote moved to " + f, "m", |
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237 f2, f, f, fmerge(f2, f, f2), True) |
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238 elif f not in ma: |
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239 act("remote created", "g", f, m2.flags(f)) |
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240 elif n != ma[f]: |
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241 if repo.ui.promptchoice( |
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242 _("remote changed %s which local deleted\n" |
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243 "use (c)hanged version or leave (d)eleted?") % f, |
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244 (_("&Changed"), _("&Deleted")), 0) == 0: |
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245 act("prompt recreating", "g", f, m2.flags(f)) |
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246 |
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247 return action |
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248 |
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|
249 def actionkey(a): |
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250 return a[1] == 'r' and -1 or 0, a |
6805
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Sort removes first when applying updates (fixes issues 750 and 912)
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251 |
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252 def applyupdates(repo, action, wctx, mctx, actx): |
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253 """apply the merge action list to the working directory |
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254 |
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255 wctx is the working copy context |
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256 mctx is the context to be merged into the working copy |
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257 actx is the context of the common ancestor |
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258 """ |
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259 |
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260 updated, merged, removed, unresolved = 0, 0, 0, 0 |
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261 ms = mergestate(repo) |
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262 ms.reset(wctx.parents()[0].node()) |
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263 moves = [] |
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264 action.sort(key=actionkey) |
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265 substate = wctx.substate # prime |
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266 |
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267 # prescan for merges |
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268 u = repo.ui |
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269 for a in action: |
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270 f, m = a[:2] |
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271 if m == 'm': # merge |
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272 f2, fd, flags, move = a[2:] |
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273 if f == '.hgsubstate': # merged internally |
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274 continue |
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275 repo.ui.debug("preserving %s for resolve of %s\n" % (f, fd)) |
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276 fcl = wctx[f] |
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277 fco = mctx[f2] |
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278 if mctx == actx: # backwards, use working dir parent as ancestor |
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279 if fcl.parents(): |
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280 fca = fcl.parents()[0] |
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281 else: |
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282 fca = repo.filectx(f, fileid=nullrev) |
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283 else: |
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284 fca = fcl.ancestor(fco, actx) |
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285 if not fca: |
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286 fca = repo.filectx(f, fileid=nullrev) |
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287 ms.add(fcl, fco, fca, fd, flags) |
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288 if f != fd and move: |
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289 moves.append(f) |
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290 |
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291 # remove renamed files after safely stored |
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292 for f in moves: |
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293 if os.path.lexists(repo.wjoin(f)): |
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294 repo.ui.debug("removing %s\n" % f) |
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295 os.unlink(repo.wjoin(f)) |
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296 |
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297 audit_path = util.path_auditor(repo.root) |
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298 |
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299 numupdates = len(action) |
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300 for i, a in enumerate(action): |
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301 f, m = a[:2] |
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302 u.progress(_('updating'), i + 1, item=f, total=numupdates, unit='files') |
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303 if f and f[0] == "/": |
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304 continue |
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305 if m == "r": # remove |
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306 repo.ui.note(_("removing %s\n") % f) |
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307 audit_path(f) |
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308 if f == '.hgsubstate': # subrepo states need updating |
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309 subrepo.submerge(repo, wctx, mctx, wctx) |
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310 try: |
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311 util.unlink(repo.wjoin(f)) |
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312 except OSError, inst: |
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313 if inst.errno != errno.ENOENT: |
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314 repo.ui.warn(_("update failed to remove %s: %s!\n") % |
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315 (f, inst.strerror)) |
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white space and line break cleanups
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316 removed += 1 |
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317 elif m == "m": # merge |
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318 if f == '.hgsubstate': # subrepo states need updating |
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319 subrepo.submerge(repo, wctx, mctx, wctx.ancestor(mctx)) |
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320 continue |
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321 f2, fd, flags, move = a[2:] |
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322 r = ms.resolve(fd, wctx, mctx) |
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323 if r is not None and r > 0: |
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324 unresolved += 1 |
3309
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325 else: |
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326 if r is None: |
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327 updated += 1 |
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328 else: |
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329 merged += 1 |
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330 util.set_flags(repo.wjoin(fd), 'l' in flags, 'x' in flags) |
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331 if f != fd and move and os.path.lexists(repo.wjoin(f)): |
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332 repo.ui.debug("removing %s\n" % f) |
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333 os.unlink(repo.wjoin(f)) |
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334 elif m == "g": # get |
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335 flags = a[2] |
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336 repo.ui.note(_("getting %s\n") % f) |
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337 t = mctx.filectx(f).data() |
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338 repo.wwrite(f, t, flags) |
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339 t = None |
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340 updated += 1 |
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341 if f == '.hgsubstate': # subrepo states need updating |
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342 subrepo.submerge(repo, wctx, mctx, wctx) |
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343 elif m == "d": # directory rename |
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344 f2, fd, flags = a[2:] |
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345 if f: |
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346 repo.ui.note(_("moving %s to %s\n") % (f, fd)) |
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347 t = wctx.filectx(f).data() |
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348 repo.wwrite(fd, t, flags) |
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349 util.unlink(repo.wjoin(f)) |
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350 if f2: |
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351 repo.ui.note(_("getting %s to %s\n") % (f2, fd)) |
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352 t = mctx.filectx(f2).data() |
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353 repo.wwrite(fd, t, flags) |
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354 updated += 1 |
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355 elif m == "dr": # divergent renames |
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356 fl = a[2] |
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357 repo.ui.warn(_("warning: detected divergent renames of %s to:\n") % f) |
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358 for nf in fl: |
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359 repo.ui.warn(" %s\n" % nf) |
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360 elif m == "e": # exec |
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361 flags = a[2] |
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362 util.set_flags(repo.wjoin(f), 'l' in flags, 'x' in flags) |
12369
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363 ms.commit() |
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|
364 u.progress(_('updating'), None, total=numupdates, unit='files') |
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365 |
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366 return updated, merged, removed, unresolved |
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367 |
3372
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|
368 def recordupdates(repo, action, branchmerge): |
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369 "record merge actions to the dirstate" |
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370 |
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371 for a in action: |
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372 f, m = a[:2] |
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373 if m == "r": # remove |
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374 if branchmerge: |
4904
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|
375 repo.dirstate.remove(f) |
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376 else: |
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377 repo.dirstate.forget(f) |
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378 elif m == "a": # re-add |
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379 if not branchmerge: |
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380 repo.dirstate.add(f) |
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381 elif m == "f": # forget |
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382 repo.dirstate.forget(f) |
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383 elif m == "e": # exec change |
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384 repo.dirstate.normallookup(f) |
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385 elif m == "g": # get |
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386 if branchmerge: |
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387 repo.dirstate.otherparent(f) |
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388 else: |
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389 repo.dirstate.normal(f) |
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390 elif m == "m": # merge |
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391 f2, fd, flag, move = a[2:] |
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392 if branchmerge: |
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393 # We've done a branch merge, mark this file as merged |
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394 # so that we properly record the merger later |
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395 repo.dirstate.merge(fd) |
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396 if f != f2: # copy/rename |
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397 if move: |
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398 repo.dirstate.remove(f) |
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399 if f != fd: |
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400 repo.dirstate.copy(f, fd) |
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401 else: |
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402 repo.dirstate.copy(f2, fd) |
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403 else: |
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404 # We've update-merged a locally modified file, so |
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405 # we set the dirstate to emulate a normal checkout |
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406 # of that file some time in the past. Thus our |
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407 # merge will appear as a normal local file |
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408 # modification. |
11178
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409 if f2 == fd: # file not locally copied/moved |
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410 repo.dirstate.normallookup(fd) |
3308
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411 if move: |
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412 repo.dirstate.forget(f) |
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413 elif m == "d": # directory rename |
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|
414 f2, fd, flag = a[2:] |
4819
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diff
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415 if not f2 and f not in repo.dirstate: |
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416 # untracked file moved |
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417 continue |
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418 if branchmerge: |
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419 repo.dirstate.add(fd) |
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420 if f: |
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421 repo.dirstate.remove(f) |
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422 repo.dirstate.copy(f, fd) |
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423 if f2: |
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424 repo.dirstate.copy(f2, fd) |
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425 else: |
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426 repo.dirstate.normal(fd) |
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427 if f: |
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428 repo.dirstate.forget(f) |
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429 |
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430 def update(repo, node, branchmerge, force, partial): |
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431 """ |
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432 Perform a merge between the working directory and the given node |
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433 |
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434 node = the node to update to, or None if unspecified |
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435 branchmerge = whether to merge between branches |
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436 force = whether to force branch merging or file overwriting |
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437 partial = a function to filter file lists (dirstate not updated) |
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438 |
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439 The table below shows all the behaviors of the update command |
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440 given the -c and -C or no options, whether the working directory |
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441 is dirty, whether a revision is specified, and the relationship of |
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442 the parent rev to the target rev (linear, on the same named |
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443 branch, or on another named branch). |
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444 |
12279 | 445 This logic is tested by test-update-branches.t. |
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446 |
ea8c207a0f78
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|
447 -c -C dirty rev | linear same cross |
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448 n n n n | ok (1) x |
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update: allow branch crossing without -c or -C, with no uncommitted changes
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diff
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449 n n n y | ok ok ok |
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diff
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450 n n y * | merge (2) (2) |
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ea8c207a0f78
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451 n y * * | --- discard --- |
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452 y n y * | --- (3) --- |
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ea8c207a0f78
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453 y n n * | --- ok --- |
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454 y y * * | --- (4) --- |
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455 |
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456 x = can't happen |
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457 * = don't-care |
9717
68a1b9d0663e
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diff
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458 1 = abort: crosses branches (use 'hg merge' or 'hg update -c') |
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459 2 = abort: crosses branches (use 'hg merge' to merge or |
68a1b9d0663e
update: allow branch crossing without -c or -C, with no uncommitted changes
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changeset
|
460 use 'hg update -C' to discard changes) |
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parents:
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diff
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461 3 = abort: uncommitted local changes |
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diff
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462 4 = incompatible options (checked in commands.py) |
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38be819a1225
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|
463 """ |
2815
4870f795f681
Merge: combine force and forcemerge arguments
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|
464 |
9717
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465 onode = node |
4917
126f527b3ba3
Make repo locks recursive, eliminate all passing of lock/wlock
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diff
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466 wlock = repo.wlock() |
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Use try/finally pattern to cleanup locks and transactions
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diff
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|
467 try: |
6747
f6c00b17387c
use repo[changeid] to get a changectx
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diff
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|
468 wc = repo[None] |
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|
469 if node is None: |
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diff
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|
470 # tip of current branch |
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|
471 try: |
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changeset
|
472 node = repo.branchtags()[wc.branch()] |
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|
473 except KeyError: |
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diff
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|
474 if wc.branch() == "default": # no default branch! |
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diff
changeset
|
475 node = repo.lookup("tip") # update to tip |
78a6b985882f
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diff
changeset
|
476 else: |
78a6b985882f
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diff
changeset
|
477 raise util.Abort(_("branch %s not found") % wc.branch()) |
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diff
changeset
|
478 overwrite = force and not branchmerge |
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diff
changeset
|
479 pl = wc.parents() |
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changeset
|
480 p1, p2 = pl[0], repo[node] |
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changeset
|
481 pa = p1.ancestor(p2) |
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diff
changeset
|
482 fp1, fp2, xp1, xp2 = p1.node(), p2.node(), str(p1), str(p2) |
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changeset
|
483 fastforward = False |
3314 | 484 |
4915
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diff
changeset
|
485 ### check phase |
97b734fb9c6f
Use try/finally pattern to cleanup locks and transactions
Matt Mackall <mpm@selenic.com>
parents:
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diff
changeset
|
486 if not overwrite and len(pl) > 1: |
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diff
changeset
|
487 raise util.Abort(_("outstanding uncommitted merges")) |
6375
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diff
changeset
|
488 if branchmerge: |
cdc458b12f0f
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diff
changeset
|
489 if pa == p2: |
11417
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11178
diff
changeset
|
490 raise util.Abort(_("merging with a working directory ancestor" |
6f1d1ed3e19a
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diff
changeset
|
491 " has no effect")) |
6375
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diff
changeset
|
492 elif pa == p1: |
cdc458b12f0f
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6350
diff
changeset
|
493 if p1.branch() != p2.branch(): |
4915
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494 fastforward = True |
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495 else: |
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496 raise util.Abort(_("nothing to merge (use 'hg update'" |
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497 " or check 'hg heads')")) |
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498 if not force and (wc.files() or wc.deleted()): |
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499 raise util.Abort(_("outstanding uncommitted changes " |
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500 "(use 'hg status' to list changes)")) |
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501 elif not overwrite: |
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502 if pa == p1 or pa == p2: # linear |
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503 pass # all good |
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504 elif wc.files() or wc.deleted(): |
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505 raise util.Abort(_("crosses branches (merge branches or use" |
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506 " --clean to discard changes)")) |
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507 elif onode is None: |
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508 raise util.Abort(_("crosses branches (merge branches or use" |
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509 " --check to force update)")) |
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510 else: |
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511 # Allow jumping branches if clean and specific rev given |
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512 overwrite = True |
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513 |
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514 ### calculate phase |
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515 action = [] |
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516 wc.status(unknown=True) # prime cache |
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517 if not force: |
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518 _checkunknown(wc, p2) |
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519 if not util.checkcase(repo.path): |
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520 _checkcollision(p2) |
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521 action += _forgetremoved(wc, p2, branchmerge) |
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522 action += manifestmerge(repo, wc, p2, pa, overwrite, partial) |
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523 |
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524 ### apply phase |
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525 if not branchmerge: # just jump to the new rev |
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526 fp1, fp2, xp1, xp2 = fp2, nullid, xp2, '' |
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527 if not partial: |
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528 repo.hook('preupdate', throw=True, parent1=xp1, parent2=xp2) |
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529 |
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530 stats = applyupdates(repo, action, wc, p2, pa) |
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531 |
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532 if not partial: |
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533 repo.dirstate.setparents(fp1, fp2) |
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534 recordupdates(repo, action, branchmerge) |
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535 if not branchmerge and not fastforward: |
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536 repo.dirstate.setbranch(p2.branch()) |
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537 finally: |
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496ae1ea4698
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538 wlock.release() |
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539 |
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540 if not partial: |
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541 repo.hook('update', parent1=xp1, parent2=xp2, error=stats[3]) |
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542 return stats |