Mercurial > hg
annotate mercurial/discovery.py @ 24066:afdf5f6ab37a
pager: set an attribute on ui indicating that a pager is active
A subsequent patch will teach the color extension to do different things
depending on whether a pager is active. This patch leaves a breadcrumb
on the ui instance to allow it do that that.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Fri, 06 Feb 2015 12:07:56 -0800 |
parents | 70383c6961b4 |
children | 6ddc86eedc3b |
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1 # discovery.py - protocol changeset discovery functions |
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2 # |
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3 # Copyright 2010 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 |
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8 from node import nullid, short |
3891 | 9 from i18n import _ |
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10 import util, setdiscovery, treediscovery, phases, obsolete, bookmarks |
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11 import branchmap |
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12 |
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13 def findcommonincoming(repo, remote, heads=None, force=False): |
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14 """Return a tuple (common, anyincoming, heads) used to identify the common |
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15 subset of nodes between repo and remote. |
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16 |
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17 "common" is a list of (at least) the heads of the common subset. |
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18 "anyincoming" is testable as a boolean indicating if any nodes are missing |
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19 locally. If remote does not support getbundle, this actually is a list of |
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20 roots of the nodes that would be incoming, to be supplied to |
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21 changegroupsubset. No code except for pull should be relying on this fact |
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22 any longer. |
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23 "heads" is either the supplied heads, or else the remote's heads. |
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24 |
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25 If you pass heads and they are all known locally, the response lists just |
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26 these heads in "common" and in "heads". |
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27 |
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28 Please use findcommonoutgoing to compute the set of outgoing nodes to give |
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29 extensions a good hook into outgoing. |
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30 """ |
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31 |
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32 if not remote.capable('getbundle'): |
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33 return treediscovery.findcommonincoming(repo, remote, heads, force) |
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34 |
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35 if heads: |
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36 allknown = True |
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37 knownnode = repo.changelog.hasnode # no nodemap until it is filtered |
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38 for h in heads: |
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39 if not knownnode(h): |
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40 allknown = False |
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41 break |
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42 if allknown: |
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43 return (heads, False, heads) |
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44 |
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45 res = setdiscovery.findcommonheads(repo.ui, repo, remote, |
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46 abortwhenunrelated=not force) |
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47 common, anyinc, srvheads = res |
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48 return (list(common), anyinc, heads or list(srvheads)) |
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49 |
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50 class outgoing(object): |
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51 '''Represents the set of nodes present in a local repo but not in a |
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52 (possibly) remote one. |
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53 |
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54 Members: |
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55 |
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56 missing is a list of all nodes present in local but not in remote. |
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57 common is a list of all nodes shared between the two repos. |
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58 excluded is the list of missing changeset that shouldn't be sent remotely. |
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59 missingheads is the list of heads of missing. |
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60 commonheads is the list of heads of common. |
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61 |
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62 The sets are computed on demand from the heads, unless provided upfront |
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63 by discovery.''' |
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64 |
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65 def __init__(self, revlog, commonheads, missingheads): |
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66 self.commonheads = commonheads |
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67 self.missingheads = missingheads |
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68 self._revlog = revlog |
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69 self._common = None |
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70 self._missing = None |
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71 self.excluded = [] |
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72 |
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73 def _computecommonmissing(self): |
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74 sets = self._revlog.findcommonmissing(self.commonheads, |
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75 self.missingheads) |
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76 self._common, self._missing = sets |
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77 |
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78 @util.propertycache |
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79 def common(self): |
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80 if self._common is None: |
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81 self._computecommonmissing() |
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82 return self._common |
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83 |
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84 @util.propertycache |
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85 def missing(self): |
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86 if self._missing is None: |
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87 self._computecommonmissing() |
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88 return self._missing |
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89 |
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92 '''Return an outgoing instance to identify the nodes present in repo but |
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93 not in other. |
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94 |
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96 (inclusive) are included. If you already know the local repo's heads, | |
97 passing them in onlyheads is faster than letting them be recomputed here. | |
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98 |
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99 If commoninc is given, it must be the result of a prior call to |
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100 findcommonincoming(repo, other, force) to avoid recomputing it here. |
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101 |
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102 If portable is given, compute more conservative common and missingheads, |
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103 to make bundles created from the instance more portable.''' |
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104 # declare an empty outgoing object to be filled later |
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105 og = outgoing(repo.changelog, None, None) |
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106 |
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107 # get common set if not provided |
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108 if commoninc is None: |
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109 commoninc = findcommonincoming(repo, other, force=force) |
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110 og.commonheads, _any, _hds = commoninc |
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111 |
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112 # compute outgoing |
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113 mayexclude = (repo._phasecache.phaseroots[phases.secret] or repo.obsstore) |
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114 if not mayexclude: |
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115 og.missingheads = onlyheads or repo.heads() |
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116 elif onlyheads is None: |
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117 # use visible heads as it should be cached |
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118 og.missingheads = repo.filtered("served").heads() |
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119 og.excluded = [ctx.node() for ctx in repo.set('secret() or extinct()')] |
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120 else: |
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121 # compute common, missing and exclude secret stuff |
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122 sets = repo.changelog.findcommonmissing(og.commonheads, onlyheads) |
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123 og._common, allmissing = sets |
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124 og._missing = missing = [] |
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125 og.excluded = excluded = [] |
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126 for node in allmissing: |
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127 ctx = repo[node] |
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128 if ctx.phase() >= phases.secret or ctx.extinct(): |
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129 excluded.append(node) |
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130 else: |
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131 missing.append(node) |
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132 if len(missing) == len(allmissing): |
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133 missingheads = onlyheads |
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134 else: # update missing heads |
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135 missingheads = phases.newheads(repo, onlyheads, excluded) |
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136 og.missingheads = missingheads |
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137 if portable: |
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138 # recompute common and missingheads as if -r<rev> had been given for |
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139 # each head of missing, and --base <rev> for each head of the proper |
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140 # ancestors of missing |
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141 og._computecommonmissing() |
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142 cl = repo.changelog |
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143 missingrevs = set(cl.rev(n) for n in og._missing) |
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144 og._common = set(cl.ancestors(missingrevs)) - missingrevs |
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145 commonheads = set(og.commonheads) |
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146 og.missingheads = [h for h in og.missingheads if h not in commonheads] |
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147 |
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148 return og |
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149 |
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150 def _headssummary(repo, remote, outgoing): |
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151 """compute a summary of branch and heads status before and after push |
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152 |
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153 return {'branch': ([remoteheads], [newheads], [unsyncedheads])} mapping |
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154 |
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155 - branch: the branch name |
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156 - remoteheads: the list of remote heads known locally |
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157 None if the branch is new |
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158 - newheads: the new remote heads (known locally) with outgoing pushed |
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159 - unsyncedheads: the list of remote heads unknown locally. |
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160 """ |
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161 cl = repo.changelog |
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162 headssum = {} |
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163 # A. Create set of branches involved in the push. |
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164 branches = set(repo[n].branch() for n in outgoing.missing) |
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165 remotemap = remote.branchmap() |
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166 newbranches = branches - set(remotemap) |
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167 branches.difference_update(newbranches) |
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168 |
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169 # A. register remote heads |
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170 remotebranches = set() |
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171 for branch, heads in remote.branchmap().iteritems(): |
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172 remotebranches.add(branch) |
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173 known = [] |
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174 unsynced = [] |
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175 knownnode = cl.hasnode # do not use nodemap until it is filtered |
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176 for h in heads: |
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177 if knownnode(h): |
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178 known.append(h) |
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179 else: |
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180 unsynced.append(h) |
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181 headssum[branch] = (known, list(known), unsynced) |
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182 # B. add new branch data |
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183 missingctx = list(repo[n] for n in outgoing.missing) |
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184 touchedbranches = set() |
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185 for ctx in missingctx: |
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186 branch = ctx.branch() |
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187 touchedbranches.add(branch) |
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188 if branch not in headssum: |
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189 headssum[branch] = (None, [], []) |
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190 |
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191 # C drop data about untouched branches: |
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192 for branch in remotebranches - touchedbranches: |
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193 del headssum[branch] |
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194 |
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195 # D. Update newmap with outgoing changes. |
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196 # This will possibly add new heads and remove existing ones. |
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197 newmap = branchmap.branchcache((branch, heads[1]) |
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198 for branch, heads in headssum.iteritems() |
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199 if heads[0] is not None) |
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200 newmap.update(repo, (ctx.rev() for ctx in missingctx)) |
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201 for branch, newheads in newmap.iteritems(): |
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202 headssum[branch][1][:] = newheads |
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203 return headssum |
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204 |
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205 def _oldheadssummary(repo, remoteheads, outgoing, inc=False): |
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206 """Compute branchmapsummary for repo without branchmap support""" |
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207 |
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208 # 1-4b. old servers: Check for new topological heads. |
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209 # Construct {old,new}map with branch = None (topological branch). |
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210 # (code based on update) |
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211 knownnode = repo.changelog.hasnode # no nodemap until it is filtered |
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212 oldheads = set(h for h in remoteheads if knownnode(h)) |
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213 # all nodes in outgoing.missing are children of either: |
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214 # - an element of oldheads |
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215 # - another element of outgoing.missing |
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216 # - nullrev |
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217 # This explains why the new head are very simple to compute. |
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218 r = repo.set('heads(%ln + %ln)', oldheads, outgoing.missing) |
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219 newheads = list(c.node() for c in r) |
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220 # set some unsynced head to issue the "unsynced changes" warning |
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221 unsynced = inc and set([None]) or set() |
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222 return {None: (oldheads, newheads, unsynced)} |
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223 |
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224 def checkheads(repo, remote, outgoing, remoteheads, newbranch=False, inc=False, |
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225 newbookmarks=[]): |
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226 """Check that a push won't add any outgoing head |
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227 |
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228 raise Abort error and display ui message as needed. |
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229 """ |
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230 # Check for each named branch if we're creating new remote heads. |
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231 # To be a remote head after push, node must be either: |
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232 # - unknown locally |
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233 # - a local outgoing head descended from update |
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234 # - a remote head that's known locally and not |
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235 # ancestral to an outgoing head |
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236 if remoteheads == [nullid]: |
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237 # remote is empty, nothing to check. |
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238 return |
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239 |
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240 if remote.capable('branchmap'): |
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241 headssum = _headssummary(repo, remote, outgoing) |
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242 else: |
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243 headssum = _oldheadssummary(repo, remoteheads, outgoing, inc) |
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244 newbranches = [branch for branch, heads in headssum.iteritems() |
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245 if heads[0] is None] |
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246 # 1. Check for new branches on the remote. |
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247 if newbranches and not newbranch: # new branch requires --new-branch |
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248 branchnames = ', '.join(sorted(newbranches)) |
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249 raise util.Abort(_("push creates new remote branches: %s!") |
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250 % branchnames, |
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251 hint=_("use 'hg push --new-branch' to create" |
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252 " new remote branches")) |
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253 |
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254 # 2. Compute newly pushed bookmarks. We don't warn about bookmarked heads. |
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255 localbookmarks = repo._bookmarks |
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256 remotebookmarks = remote.listkeys('bookmarks') |
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257 bookmarkedheads = set() |
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258 for bm in localbookmarks: |
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259 rnode = remotebookmarks.get(bm) |
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260 if rnode and rnode in repo: |
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261 lctx, rctx = repo[bm], repo[rnode] |
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262 if bookmarks.validdest(repo, rctx, lctx): |
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263 bookmarkedheads.add(lctx.node()) |
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264 else: |
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265 if bm in newbookmarks: |
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266 bookmarkedheads.add(repo[bm].node()) |
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267 |
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268 # 3. Check for new heads. |
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269 # If there are more heads after the push than before, a suitable |
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270 # error message, depending on unsynced status, is displayed. |
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271 error = None |
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272 allmissing = set(outgoing.missing) |
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273 allfuturecommon = set(c.node() for c in repo.set('%ld', outgoing.common)) |
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274 allfuturecommon.update(allmissing) |
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275 for branch, heads in sorted(headssum.iteritems()): |
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276 remoteheads, newheads, unsyncedheads = heads |
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277 candidate_newhs = set(newheads) |
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278 # add unsynced data |
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279 if remoteheads is None: |
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280 oldhs = set() |
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281 else: |
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282 oldhs = set(remoteheads) |
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283 oldhs.update(unsyncedheads) |
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284 candidate_newhs.update(unsyncedheads) |
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285 dhs = None # delta heads, the new heads on branch |
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286 discardedheads = set() |
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287 if repo.obsstore: |
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288 # remove future heads which are actually obsoleted by another |
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289 # pushed element: |
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290 # |
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291 # XXX as above, There are several cases this case does not handle |
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292 # XXX properly |
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293 # |
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294 # (1) if <nh> is public, it won't be affected by obsolete marker |
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295 # and a new is created |
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296 # |
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297 # (2) if the new heads have ancestors which are not obsolete and |
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298 # not ancestors of any other heads we will have a new head too. |
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299 # |
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300 # These two cases will be easy to handle for known changeset but |
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301 # much more tricky for unsynced changes. |
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302 newhs = set() |
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303 for nh in candidate_newhs: |
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304 if nh in repo and repo[nh].phase() <= phases.public: |
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305 newhs.add(nh) |
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306 else: |
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307 for suc in obsolete.allsuccessors(repo.obsstore, [nh]): |
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308 if suc != nh and suc in allfuturecommon: |
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309 discardedheads.add(nh) |
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310 break |
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311 else: |
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312 newhs.add(nh) |
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313 else: |
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314 newhs = candidate_newhs |
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315 unsynced = sorted(h for h in unsyncedheads if h not in discardedheads) |
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316 if unsynced: |
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317 if None in unsynced: |
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318 # old remote, no heads data |
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319 heads = None |
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320 elif len(unsynced) <= 4 or repo.ui.verbose: |
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321 heads = ' '.join(short(h) for h in unsynced) |
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322 else: |
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323 heads = (' '.join(short(h) for h in unsynced[:4]) + |
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324 ' ' + _("and %s others") % (len(unsynced) - 4)) |
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325 if heads is None: |
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326 repo.ui.status(_("remote has heads that are " |
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327 "not known locally\n")) |
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328 elif branch is None: |
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329 repo.ui.status(_("remote has heads that are " |
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330 "not known locally: %s\n") % heads) |
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331 else: |
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332 repo.ui.status(_("remote has heads on branch '%s' that are " |
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333 "not known locally: %s\n") % (branch, heads)) |
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334 if remoteheads is None: |
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335 if len(newhs) > 1: |
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336 dhs = list(newhs) |
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337 if error is None: |
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338 error = (_("push creates new branch '%s' " |
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339 "with multiple heads") % (branch)) |
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340 hint = _("merge or" |
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341 " see \"hg help push\" for details about" |
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342 " pushing new heads") |
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343 elif len(newhs) > len(oldhs): |
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344 # remove bookmarked or existing remote heads from the new heads list |
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345 dhs = sorted(newhs - bookmarkedheads - oldhs) |
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346 if dhs: |
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347 if error is None: |
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348 if branch not in ('default', None): |
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349 error = _("push creates new remote head %s " |
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350 "on branch '%s'!") % (short(dhs[0]), branch) |
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351 elif repo[dhs[0]].bookmarks(): |
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352 error = _("push creates new remote head %s " |
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353 "with bookmark '%s'!") % ( |
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354 short(dhs[0]), repo[dhs[0]].bookmarks()[0]) |
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355 else: |
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356 error = _("push creates new remote head %s!" |
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357 ) % short(dhs[0]) |
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358 if unsyncedheads: |
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359 hint = _("pull and merge or" |
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360 " see \"hg help push\" for details about" |
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361 " pushing new heads") |
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362 else: |
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363 hint = _("merge or" |
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364 " see \"hg help push\" for details about" |
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365 " pushing new heads") |
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366 if branch is None: |
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367 repo.ui.note(_("new remote heads:\n")) |
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368 else: |
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369 repo.ui.note(_("new remote heads on branch '%s':\n") % branch) |
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370 for h in dhs: |
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371 repo.ui.note((" %s\n") % short(h)) |
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372 if error: |
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373 raise util.Abort(error, hint=hint) |