Mercurial > hg
annotate mercurial/merge.py @ 12025:2315a95ee887
mdiff.patch(): add a special case for when the base text is empty
remove the special casing from revlog.addgroup()
author | Benoit Boissinot <benoit.boissinot@ens-lyon.org> |
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date | Mon, 23 Aug 2010 13:28:04 +0200 |
parents | ce818cf215dc |
children | ad787252fed6 |
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 |
6518 | 17 self._read() |
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18 def reset(self, node=None): |
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19 self._state = {} |
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20 if node: |
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21 self._local = node |
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22 shutil.rmtree(self._repo.join("merge"), True) |
6518 | 23 def _read(self): |
24 self._state = {} | |
25 try: | |
26 f = self._repo.opener("merge/state") | |
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27 for i, l in enumerate(f): |
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28 if i == 0: |
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29 self._local = bin(l[:-1]) |
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30 else: |
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31 bits = l[:-1].split("\0") |
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32 self._state[bits[0]] = bits[1:] |
6518 | 33 except IOError, err: |
34 if err.errno != errno.ENOENT: | |
35 raise | |
36 def _write(self): | |
37 f = self._repo.opener("merge/state", "w") | |
38 f.write(hex(self._local) + "\n") | |
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39 for d, v in self._state.iteritems(): |
6518 | 40 f.write("\0".join([d] + v) + "\n") |
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41 def add(self, fcl, fco, fca, fd, flags): |
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42 hash = util.sha1(fcl.path()).hexdigest() |
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43 self._repo.opener("merge/" + hash, "w").write(fcl.data()) |
6518 | 44 self._state[fd] = ['u', hash, fcl.path(), fca.path(), |
45 hex(fca.filenode()), fco.path(), flags] | |
46 self._write() | |
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47 def __contains__(self, dfile): |
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48 return dfile in self._state |
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49 def __getitem__(self, dfile): |
6518 | 50 return self._state[dfile][0] |
51 def __iter__(self): | |
52 l = self._state.keys() | |
53 l.sort() | |
54 for f in l: | |
55 yield f | |
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56 def mark(self, dfile, state): |
6518 | 57 self._state[dfile][0] = state |
58 self._write() | |
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59 def resolve(self, dfile, wctx, octx): |
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60 if self[dfile] == 'r': |
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61 return 0 |
6518 | 62 state, hash, lfile, afile, anode, ofile, flags = self._state[dfile] |
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63 f = self._repo.opener("merge/" + hash) |
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64 self._repo.wwrite(dfile, f.read(), flags) |
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65 fcd = wctx[dfile] |
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66 fco = octx[ofile] |
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67 fca = self._repo.filectx(afile, fileid=anode) |
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68 r = filemerge.filemerge(self._repo, self._local, lfile, fcd, fco, fca) |
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69 if not r: |
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70 self.mark(dfile, 'r') |
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71 return r |
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72 |
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73 def _checkunknown(wctx, mctx): |
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74 "check for collisions between unknown files and files in mctx" |
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75 for f in wctx.unknown(): |
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76 if f in mctx and mctx[f].cmp(wctx[f]): |
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77 raise util.Abort(_("untracked file in working directory differs" |
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78 " from file in requested revision: '%s'") % f) |
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79 |
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80 def _checkcollision(mctx): |
3785 | 81 "check for case folding collisions in the destination context" |
82 folded = {} | |
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83 for fn in mctx: |
3785 | 84 fold = fn.lower() |
85 if fold in folded: | |
86 raise util.Abort(_("case-folding collision between %s and %s") | |
87 % (fn, folded[fold])) | |
88 folded[fold] = fn | |
89 | |
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90 def _forgetremoved(wctx, mctx, branchmerge): |
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91 """ |
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92 Forget removed files |
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93 |
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94 If we're jumping between revisions (as opposed to merging), and if |
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95 neither the working directory nor the target rev has the file, |
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96 then we need to remove it from the dirstate, to prevent the |
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97 dirstate from listing the file when it is no longer in the |
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98 manifest. |
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99 |
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100 If we're merging, and the other revision has removed a file |
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101 that is not present in the working directory, we need to mark it |
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102 as removed. |
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103 """ |
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104 |
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105 action = [] |
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106 state = branchmerge and 'r' or 'f' |
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107 for f in wctx.deleted(): |
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108 if f not in mctx: |
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109 action.append((f, state)) |
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110 |
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111 if not branchmerge: |
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112 for f in wctx.removed(): |
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113 if f not in mctx: |
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114 action.append((f, "f")) |
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115 |
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116 return action |
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117 |
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118 def manifestmerge(repo, p1, p2, pa, overwrite, partial): |
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119 """ |
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120 Merge p1 and p2 with ancestor pa and generate merge action list |
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121 |
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122 overwrite = whether we clobber working files |
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123 partial = function to filter file lists |
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124 """ |
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125 |
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126 def fmerge(f, f2, fa): |
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127 """merge flags""" |
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128 a, m, n = ma.flags(fa), m1.flags(f), m2.flags(f2) |
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129 if m == n: # flags agree |
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130 return m # unchanged |
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131 if m and n and not a: # flags set, don't agree, differ from parent |
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132 r = repo.ui.promptchoice( |
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133 _(" conflicting flags for %s\n" |
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134 "(n)one, e(x)ec or sym(l)ink?") % f, |
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135 (_("&None"), _("E&xec"), _("Sym&link")), 0) |
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136 if r == 1: |
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137 return "x" # Exec |
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138 if r == 2: |
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139 return "l" # Symlink |
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140 return "" |
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141 if m and m != a: # changed from a to m |
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142 return m |
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143 if n and n != a: # changed from a to n |
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144 return n |
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145 return '' # flag was cleared |
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146 |
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147 def act(msg, m, f, *args): |
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148 repo.ui.debug(" %s: %s -> %s\n" % (f, msg, m)) |
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149 action.append((f, m) + args) |
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150 |
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151 action, copy = [], {} |
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152 |
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153 if overwrite: |
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154 pa = p1 |
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155 elif pa == p2: # backwards |
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156 pa = p1.p1() |
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157 elif pa and repo.ui.configbool("merge", "followcopies", True): |
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158 dirs = repo.ui.configbool("merge", "followdirs", True) |
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159 copy, diverge = copies.copies(repo, p1, p2, pa, dirs) |
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160 for of, fl in diverge.iteritems(): |
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161 act("divergent renames", "dr", of, fl) |
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162 |
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163 repo.ui.note(_("resolving manifests\n")) |
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164 repo.ui.debug(" overwrite %s partial %s\n" % (overwrite, bool(partial))) |
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165 repo.ui.debug(" ancestor %s local %s remote %s\n" % (pa, p1, p2)) |
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166 |
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167 m1, m2, ma = p1.manifest(), p2.manifest(), pa.manifest() |
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168 copied = set(copy.values()) |
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169 |
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170 if '.hgsubstate' in m1: |
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171 # check whether sub state is modified |
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172 for s in p1.substate: |
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173 if p1.sub(s).dirty(): |
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174 m1['.hgsubstate'] += "+" |
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175 break |
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176 |
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177 # Compare manifests |
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178 for f, n in m1.iteritems(): |
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179 if partial and not partial(f): |
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180 continue |
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181 if f in m2: |
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183 a = ma.get(f, nullid) |
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184 if n == m2[f] or m2[f] == a: # same or local newer |
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185 # is file locally modified or flags need changing? |
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186 # dirstate flags may need to be made current |
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187 if m1.flags(f) != rflags or n[20:]: |
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188 act("update permissions", "e", f, rflags) |
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189 elif n == a: # remote newer |
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190 act("remote is newer", "g", f, rflags) |
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191 else: # both changed |
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192 act("versions differ", "m", f, f, f, rflags, False) |
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193 elif f in copied: # files we'll deal with on m2 side |
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194 pass |
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195 elif f in copy: |
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196 f2 = copy[f] |
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197 if f2 not in m2: # directory rename |
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198 act("remote renamed directory to " + f2, "d", |
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199 f, None, f2, m1.flags(f)) |
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200 else: # case 2 A,B/B/B or case 4,21 A/B/B |
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201 act("local copied/moved to " + f2, "m", |
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202 f, f2, f, fmerge(f, f2, f2), False) |
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203 elif f in ma: # clean, a different, no remote |
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204 if n != ma[f]: |
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205 if repo.ui.promptchoice( |
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206 _(" local changed %s which remote deleted\n" |
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207 "use (c)hanged version or (d)elete?") % f, |
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208 (_("&Changed"), _("&Delete")), 0): |
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209 act("prompt delete", "r", f) |
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211 act("prompt keep", "a", f) | |
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212 elif n[20:] == "a": # added, no remote |
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213 act("remote deleted", "f", f) |
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214 elif n[20:] != "u": |
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215 act("other deleted", "r", f) |
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216 |
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217 for f, n in m2.iteritems(): |
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218 if partial and not partial(f): |
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219 continue |
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220 if f in m1 or f in copied: # files already visited |
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221 continue |
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222 if f in copy: |
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223 f2 = copy[f] |
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224 if f2 not in m1: # directory rename |
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225 act("local renamed directory to " + f2, "d", |
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226 None, f, f2, m2.flags(f)) |
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227 elif f2 in m2: # rename case 1, A/A,B/A |
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228 act("remote copied to " + f, "m", |
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229 f2, f, f, fmerge(f2, f, f2), False) |
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230 else: # case 3,20 A/B/A |
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231 act("remote moved to " + f, "m", |
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232 f2, f, f, fmerge(f2, f, f2), True) |
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233 elif f not in ma: |
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234 act("remote created", "g", f, m2.flags(f)) |
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235 elif n != ma[f]: |
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236 if repo.ui.promptchoice( |
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237 _("remote changed %s which local deleted\n" |
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238 "use (c)hanged version or leave (d)eleted?") % f, |
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239 (_("&Changed"), _("&Deleted")), 0) == 0: |
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240 act("prompt recreating", "g", f, m2.flags(f)) |
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241 |
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242 return action |
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243 |
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244 def actionkey(a): |
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245 return a[1] == 'r' and -1 or 0, a |
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246 |
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247 def applyupdates(repo, action, wctx, mctx, actx): |
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248 """apply the merge action list to the working directory |
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249 |
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250 wctx is the working copy context |
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251 mctx is the context to be merged into the working copy |
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252 actx is the context of the common ancestor |
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253 """ |
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254 |
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255 updated, merged, removed, unresolved = 0, 0, 0, 0 |
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256 ms = mergestate(repo) |
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257 ms.reset(wctx.parents()[0].node()) |
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258 moves = [] |
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259 action.sort(key=actionkey) |
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260 substate = wctx.substate # prime |
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261 |
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262 # prescan for merges |
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263 u = repo.ui |
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264 for a in action: |
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265 f, m = a[:2] |
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266 if m == 'm': # merge |
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267 f2, fd, flags, move = a[2:] |
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268 if f == '.hgsubstate': # merged internally |
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269 continue |
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270 repo.ui.debug("preserving %s for resolve of %s\n" % (f, fd)) |
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271 fcl = wctx[f] |
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272 fco = mctx[f2] |
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273 if mctx == actx: # backwards, use working dir parent as ancestor |
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274 fca = fcl.parents()[0] |
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275 else: |
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276 fca = fcl.ancestor(fco, actx) |
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277 if not fca: |
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278 fca = repo.filectx(f, fileid=nullrev) |
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279 ms.add(fcl, fco, fca, fd, flags) |
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280 if f != fd and move: |
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281 moves.append(f) |
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282 |
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283 # remove renamed files after safely stored |
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284 for f in moves: |
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285 if util.lexists(repo.wjoin(f)): |
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286 repo.ui.debug("removing %s\n" % f) |
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287 os.unlink(repo.wjoin(f)) |
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288 |
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Make audit_path more stringent.
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289 audit_path = util.path_auditor(repo.root) |
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290 |
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Augie Fackler <durin42@gmail.com>
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291 numupdates = len(action) |
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292 for i, a in enumerate(action): |
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293 f, m = a[:2] |
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294 u.progress(_('updating'), i + 1, item=f, total=numupdates, unit='files') |
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295 if f and f[0] == "/": |
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296 continue |
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297 if m == "r": # remove |
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298 repo.ui.note(_("removing %s\n") % f) |
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299 audit_path(f) |
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300 if f == '.hgsubstate': # subrepo states need updating |
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301 subrepo.submerge(repo, wctx, mctx, wctx) |
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302 try: |
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303 util.unlink(repo.wjoin(f)) |
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304 except OSError, inst: |
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305 if inst.errno != errno.ENOENT: |
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306 repo.ui.warn(_("update failed to remove %s: %s!\n") % |
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307 (f, inst.strerror)) |
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white space and line break cleanups
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|
308 removed += 1 |
3308
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309 elif m == "m": # merge |
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310 if f == '.hgsubstate': # subrepo states need updating |
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311 subrepo.submerge(repo, wctx, mctx, wctx.ancestor(mctx)) |
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312 continue |
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313 f2, fd, flags, move = a[2:] |
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314 r = ms.resolve(fd, wctx, mctx) |
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315 if r is not None and r > 0: |
3249
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316 unresolved += 1 |
3309
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317 else: |
3400
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318 if r is None: |
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319 updated += 1 |
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320 else: |
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321 merged += 1 |
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322 util.set_flags(repo.wjoin(fd), 'l' in flags, 'x' in flags) |
5059
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323 if f != fd and move and util.lexists(repo.wjoin(f)): |
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324 repo.ui.debug("removing %s\n" % f) |
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325 os.unlink(repo.wjoin(f)) |
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326 elif m == "g": # get |
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327 flags = a[2] |
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328 repo.ui.note(_("getting %s\n") % f) |
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329 t = mctx.filectx(f).data() |
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|
330 repo.wwrite(f, t, flags) |
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331 t = None |
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|
332 updated += 1 |
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|
333 if f == '.hgsubstate': # subrepo states need updating |
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334 subrepo.submerge(repo, wctx, mctx, wctx) |
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|
335 elif m == "d": # directory rename |
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|
336 f2, fd, flags = a[2:] |
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|
337 if f: |
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changeset
|
338 repo.ui.note(_("moving %s to %s\n") % (f, fd)) |
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339 t = wctx.filectx(f).data() |
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340 repo.wwrite(fd, t, flags) |
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341 util.unlink(repo.wjoin(f)) |
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|
342 if f2: |
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changeset
|
343 repo.ui.note(_("getting %s to %s\n") % (f2, fd)) |
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|
344 t = mctx.filectx(f2).data() |
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|
345 repo.wwrite(fd, t, flags) |
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|
346 updated += 1 |
4674
723e0ddb6ada
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|
347 elif m == "dr": # divergent renames |
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changeset
|
348 fl = a[2] |
6953
63b5f4c73c98
i18n: mark strings for translation in Mercurial
Martin Geisler <mg@daimi.au.dk>
parents:
6884
diff
changeset
|
349 repo.ui.warn(_("warning: detected divergent renames of %s to:\n") % f) |
4674
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changeset
|
350 for nf in fl: |
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changeset
|
351 repo.ui.warn(" %s\n" % nf) |
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|
352 elif m == "e": # exec |
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|
353 flags = a[2] |
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changeset
|
354 util.set_flags(repo.wjoin(f), 'l' in flags, 'x' in flags) |
11716
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progress: use gerund (updating) for merge progress
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changeset
|
355 u.progress(_('updating'), None, total=numupdates, unit='files') |
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|
356 |
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|
357 return updated, merged, removed, unresolved |
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|
358 |
3372
ba7c74081861
merge: update dirstate correctly for non-branchmerge updates
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3371
diff
changeset
|
359 def recordupdates(repo, action, branchmerge): |
3315
38be819a1225
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diff
changeset
|
360 "record merge actions to the dirstate" |
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|
361 |
3111
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|
362 for a in action: |
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|
363 f, m = a[:2] |
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|
364 if m == "r": # remove |
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|
365 if branchmerge: |
4904
6fd953d5faea
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changeset
|
366 repo.dirstate.remove(f) |
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367 else: |
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changeset
|
368 repo.dirstate.forget(f) |
7768
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merge: mark kept local files as readded on linear update (issue539)
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|
369 elif m == "a": # re-add |
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370 if not branchmerge: |
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|
371 repo.dirstate.add(f) |
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|
372 elif m == "f": # forget |
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changeset
|
373 repo.dirstate.forget(f) |
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correctly update dirstate after update+mode change (issue1456)
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7066
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changeset
|
374 elif m == "e": # exec change |
7630
a679bd371091
merge: fix execute bit update issue introduced by 89207edf3973
Patrick Mezard <pmezard@gmail.com>
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changeset
|
375 repo.dirstate.normallookup(f) |
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|
376 elif m == "g": # get |
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|
377 if branchmerge: |
10968
7a0d096e221e
dirstate: more explicit name, rename normaldirty() to otherparent()
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10492
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changeset
|
378 repo.dirstate.otherparent(f) |
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|
379 else: |
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changeset
|
380 repo.dirstate.normal(f) |
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381 elif m == "m": # merge |
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|
382 f2, fd, flag, move = a[2:] |
3251
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|
383 if branchmerge: |
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changeset
|
384 # We've done a branch merge, mark this file as merged |
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|
385 # so that we properly record the merger later |
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386 repo.dirstate.merge(fd) |
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387 if f != f2: # copy/rename |
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388 if move: |
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389 repo.dirstate.remove(f) |
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390 if f != fd: |
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391 repo.dirstate.copy(f, fd) |
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392 else: |
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393 repo.dirstate.copy(f2, fd) |
3251
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394 else: |
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395 # We've update-merged a locally modified file, so |
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396 # we set the dirstate to emulate a normal checkout |
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397 # of that file some time in the past. Thus our |
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398 # merge will appear as a normal local file |
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399 # modification. |
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400 if f2 == fd: # file not locally copied/moved |
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401 repo.dirstate.normallookup(fd) |
3308
ecc1bf27378c
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402 if move: |
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403 repo.dirstate.forget(f) |
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404 elif m == "d": # directory rename |
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405 f2, fd, flag = a[2:] |
4819
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diff
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406 if not f2 and f not in repo.dirstate: |
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407 # untracked file moved |
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408 continue |
3733
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409 if branchmerge: |
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410 repo.dirstate.add(fd) |
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411 if f: |
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412 repo.dirstate.remove(f) |
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413 repo.dirstate.copy(f, fd) |
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414 if f2: |
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415 repo.dirstate.copy(f2, fd) |
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416 else: |
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417 repo.dirstate.normal(fd) |
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418 if f: |
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419 repo.dirstate.forget(f) |
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420 |
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421 def update(repo, node, branchmerge, force, partial): |
3315
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422 """ |
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423 Perform a merge between the working directory and the given node |
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424 |
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425 node = the node to update to, or None if unspecified |
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426 branchmerge = whether to merge between branches |
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427 force = whether to force branch merging or file overwriting |
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428 partial = a function to filter file lists (dirstate not updated) |
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429 |
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430 The table below shows all the behaviors of the update command |
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431 given the -c and -C or no options, whether the working directory |
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432 is dirty, whether a revision is specified, and the relationship of |
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433 the parent rev to the target rev (linear, on the same named |
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434 branch, or on another named branch). |
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435 |
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436 This logic is tested by test-update-branches. |
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437 |
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438 -c -C dirty rev | linear same cross |
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439 n n n n | ok (1) x |
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440 n n n y | ok ok ok |
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441 n n y * | merge (2) (2) |
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442 n y * * | --- discard --- |
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443 y n y * | --- (3) --- |
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444 y n n * | --- ok --- |
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445 y y * * | --- (4) --- |
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446 |
ea8c207a0f78
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447 x = can't happen |
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448 * = don't-care |
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449 1 = abort: crosses branches (use 'hg merge' or 'hg update -c') |
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450 2 = abort: crosses branches (use 'hg merge' to merge or |
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451 use 'hg update -C' to discard changes) |
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452 3 = abort: uncommitted local changes |
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453 4 = incompatible options (checked in commands.py) |
3315
38be819a1225
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|
454 """ |
2815
4870f795f681
Merge: combine force and forcemerge arguments
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diff
changeset
|
455 |
9717
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changeset
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456 onode = node |
4917
126f527b3ba3
Make repo locks recursive, eliminate all passing of lock/wlock
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diff
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|
457 wlock = repo.wlock() |
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|
458 try: |
6747
f6c00b17387c
use repo[changeid] to get a changectx
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diff
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|
459 wc = repo[None] |
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|
460 if node is None: |
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461 # tip of current branch |
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|
462 try: |
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changeset
|
463 node = repo.branchtags()[wc.branch()] |
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|
464 except KeyError: |
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465 if wc.branch() == "default": # no default branch! |
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diff
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|
466 node = repo.lookup("tip") # update to tip |
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|
467 else: |
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diff
changeset
|
468 raise util.Abort(_("branch %s not found") % wc.branch()) |
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changeset
|
469 overwrite = force and not branchmerge |
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|
470 pl = wc.parents() |
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changeset
|
471 p1, p2 = pl[0], repo[node] |
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changeset
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472 pa = p1.ancestor(p2) |
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diff
changeset
|
473 fp1, fp2, xp1, xp2 = p1.node(), p2.node(), str(p1), str(p2) |
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Use try/finally pattern to cleanup locks and transactions
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changeset
|
474 fastforward = False |
3314 | 475 |
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diff
changeset
|
476 ### check phase |
97b734fb9c6f
Use try/finally pattern to cleanup locks and transactions
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changeset
|
477 if not overwrite and len(pl) > 1: |
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|
478 raise util.Abort(_("outstanding uncommitted merges")) |
6375
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diff
changeset
|
479 if branchmerge: |
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diff
changeset
|
480 if pa == p2: |
11417
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11178
diff
changeset
|
481 raise util.Abort(_("merging with a working directory ancestor" |
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diff
changeset
|
482 " has no effect")) |
6375
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changeset
|
483 elif pa == p1: |
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changeset
|
484 if p1.branch() != p2.branch(): |
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4904
diff
changeset
|
485 fastforward = True |
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diff
changeset
|
486 else: |
6375
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parents:
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changeset
|
487 raise util.Abort(_("nothing to merge (use 'hg update'" |
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diff
changeset
|
488 " or check 'hg heads')")) |
cdc458b12f0f
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diff
changeset
|
489 if not force and (wc.files() or wc.deleted()): |
8545
3682a19bb637
merge: give hint as to how to discover uncommitted changes
Steve Borho <steve@borho.org>
parents:
8518
diff
changeset
|
490 raise util.Abort(_("outstanding uncommitted changes " |
3682a19bb637
merge: give hint as to how to discover uncommitted changes
Steve Borho <steve@borho.org>
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diff
changeset
|
491 "(use 'hg status' to list changes)")) |
6375
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changeset
|
492 elif not overwrite: |
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changeset
|
493 if pa == p1 or pa == p2: # linear |
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changeset
|
494 pass # all good |
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changeset
|
495 elif wc.files() or wc.deleted(): |
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|
496 raise util.Abort(_("crosses branches (use 'hg merge' to merge " |
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|
497 "or use 'hg update -C' to discard changes)")) |
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|
498 elif onode is None: |
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|
499 raise util.Abort(_("crosses branches (use 'hg merge' or use " |
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changeset
|
500 "'hg update -c')")) |
6375
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changeset
|
501 else: |
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|
502 # Allow jumping branches if clean and specific rev given |
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503 overwrite = True |
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Merge: move most tests to the beginning
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504 |
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505 ### calculate phase |
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506 action = [] |
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context: only scan unknowns when needed
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507 wc.status(unknown=True) # prime cache |
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508 if not force: |
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509 _checkunknown(wc, p2) |
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510 if not util.checkcase(repo.path): |
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511 _checkcollision(p2) |
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512 action += _forgetremoved(wc, p2, branchmerge) |
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513 action += manifestmerge(repo, wc, p2, pa, overwrite, partial) |
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514 |
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515 ### apply phase |
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516 if not branchmerge: # just jump to the new rev |
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517 fp1, fp2, xp1, xp2 = fp2, nullid, xp2, '' |
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518 if not partial: |
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519 repo.hook('preupdate', throw=True, parent1=xp1, parent2=xp2) |
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520 |
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9b0406b23be0
merge: pass constant cset ancestor to fctx.ancestor
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
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521 stats = applyupdates(repo, action, wc, p2, pa) |
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merge: consolidate dirstate updates
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522 |
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523 if not partial: |
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dirstate: more explicit name, rename normaldirty() to otherparent()
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524 repo.dirstate.setparents(fp1, fp2) |
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525 recordupdates(repo, action, branchmerge) |
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526 if not branchmerge and not fastforward: |
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527 repo.dirstate.setbranch(p2.branch()) |
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528 finally: |
8109
496ae1ea4698
switch lock releasing in the core from gc to explicit
Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de>
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529 wlock.release() |
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Sune Foldager <cryo@cyanite.org>
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530 |
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Sune Foldager <cryo@cyanite.org>
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531 if not partial: |
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532 repo.hook('update', parent1=xp1, parent2=xp2, error=stats[3]) |
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533 return stats |