Mercurial > hg
annotate mercurial/discovery.py @ 24946:c44534209a0a
bookmarks: rename readcurrent to readactive (API)
Today, the terms 'active' and 'current' are interchangeably used throughout the
codebase in reference to the active bookmark (the bookmark that will be updated
with the next commit). This leads to confusion among developers and users.
This patch is part of a series to standardize the usage to 'active' throughout
the mercurial codebase and user interface.
author | Ryan McElroy <rmcelroy@fb.com> |
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date | Mon, 13 Apr 2015 23:03:13 -0700 |
parents | 2b0449255800 |
children | 337d010f31e6 |
rev | line source |
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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 |
16683 | 90 def findcommonoutgoing(repo, other, onlyheads=None, force=False, |
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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 |
16683 | 95 If onlyheads is given, only nodes ancestral to nodes in onlyheads |
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 if inc: |
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222 unsynced = set([None]) |
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223 else: |
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224 unsynced = set() |
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225 return {None: (oldheads, newheads, unsynced)} |
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226 |
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227 def checkheads(repo, remote, outgoing, remoteheads, newbranch=False, inc=False, |
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228 newbookmarks=[]): |
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229 """Check that a push won't add any outgoing head |
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230 |
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231 raise Abort error and display ui message as needed. |
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232 """ |
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233 # Check for each named branch if we're creating new remote heads. |
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234 # To be a remote head after push, node must be either: |
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235 # - unknown locally |
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236 # - a local outgoing head descended from update |
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237 # - a remote head that's known locally and not |
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238 # ancestral to an outgoing head |
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239 if remoteheads == [nullid]: |
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240 # remote is empty, nothing to check. |
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241 return |
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242 |
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243 if remote.capable('branchmap'): |
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244 headssum = _headssummary(repo, remote, outgoing) |
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245 else: |
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246 headssum = _oldheadssummary(repo, remoteheads, outgoing, inc) |
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247 newbranches = [branch for branch, heads in headssum.iteritems() |
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248 if heads[0] is None] |
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249 # 1. Check for new branches on the remote. |
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250 if newbranches and not newbranch: # new branch requires --new-branch |
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251 branchnames = ', '.join(sorted(newbranches)) |
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252 raise util.Abort(_("push creates new remote branches: %s!") |
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253 % branchnames, |
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254 hint=_("use 'hg push --new-branch' to create" |
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255 " new remote branches")) |
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256 |
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257 # 2. Compute newly pushed bookmarks. We don't warn about bookmarked heads. |
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258 localbookmarks = repo._bookmarks |
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259 remotebookmarks = remote.listkeys('bookmarks') |
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260 bookmarkedheads = set() |
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261 for bm in localbookmarks: |
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262 rnode = remotebookmarks.get(bm) |
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263 if rnode and rnode in repo: |
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264 lctx, rctx = repo[bm], repo[rnode] |
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265 if bookmarks.validdest(repo, rctx, lctx): |
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266 bookmarkedheads.add(lctx.node()) |
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267 else: |
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268 if bm in newbookmarks: |
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269 bookmarkedheads.add(repo[bm].node()) |
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270 |
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271 # 3. Check for new heads. |
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272 # If there are more heads after the push than before, a suitable |
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273 # error message, depending on unsynced status, is displayed. |
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274 error = None |
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275 # If there is no obsstore, allfuturecommon won't be used, so no |
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276 # need to compute it. |
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277 if repo.obsstore: |
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278 allmissing = set(outgoing.missing) |
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279 cctx = repo.set('%ld', outgoing.common) |
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280 allfuturecommon = set(c.node() for c in cctx) |
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281 allfuturecommon.update(allmissing) |
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282 for branch, heads in sorted(headssum.iteritems()): |
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283 remoteheads, newheads, unsyncedheads = heads |
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284 candidate_newhs = set(newheads) |
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285 # add unsynced data |
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286 if remoteheads is None: |
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287 oldhs = set() |
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288 else: |
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289 oldhs = set(remoteheads) |
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290 oldhs.update(unsyncedheads) |
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291 candidate_newhs.update(unsyncedheads) |
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292 dhs = None # delta heads, the new heads on branch |
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293 discardedheads = set() |
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294 if repo.obsstore: |
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295 # remove future heads which are actually obsoleted by another |
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296 # pushed element: |
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297 # |
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298 # XXX as above, There are several cases this case does not handle |
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299 # XXX properly |
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300 # |
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301 # (1) if <nh> is public, it won't be affected by obsolete marker |
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302 # and a new is created |
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303 # |
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304 # (2) if the new heads have ancestors which are not obsolete and |
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305 # not ancestors of any other heads we will have a new head too. |
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306 # |
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307 # These two cases will be easy to handle for known changeset but |
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308 # much more tricky for unsynced changes. |
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309 newhs = set() |
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310 for nh in candidate_newhs: |
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311 if nh in repo and repo[nh].phase() <= phases.public: |
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312 newhs.add(nh) |
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313 else: |
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314 for suc in obsolete.allsuccessors(repo.obsstore, [nh]): |
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315 if suc != nh and suc in allfuturecommon: |
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316 discardedheads.add(nh) |
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317 break |
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318 else: |
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319 newhs.add(nh) |
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320 else: |
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321 newhs = candidate_newhs |
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322 unsynced = sorted(h for h in unsyncedheads if h not in discardedheads) |
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323 if unsynced: |
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324 if None in unsynced: |
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325 # old remote, no heads data |
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326 heads = None |
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327 elif len(unsynced) <= 4 or repo.ui.verbose: |
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328 heads = ' '.join(short(h) for h in unsynced) |
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329 else: |
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330 heads = (' '.join(short(h) for h in unsynced[:4]) + |
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331 ' ' + _("and %s others") % (len(unsynced) - 4)) |
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332 if heads is None: |
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333 repo.ui.status(_("remote has heads that are " |
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334 "not known locally\n")) |
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335 elif branch is None: |
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336 repo.ui.status(_("remote has heads that are " |
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337 "not known locally: %s\n") % heads) |
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338 else: |
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339 repo.ui.status(_("remote has heads on branch '%s' that are " |
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340 "not known locally: %s\n") % (branch, heads)) |
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341 if remoteheads is None: |
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342 if len(newhs) > 1: |
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343 dhs = list(newhs) |
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344 if error is None: |
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345 error = (_("push creates new branch '%s' " |
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346 "with multiple heads") % (branch)) |
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347 hint = _("merge or" |
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348 " see \"hg help push\" for details about" |
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349 " pushing new heads") |
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350 elif len(newhs) > len(oldhs): |
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351 # remove bookmarked or existing remote heads from the new heads list |
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352 dhs = sorted(newhs - bookmarkedheads - oldhs) |
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353 if dhs: |
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354 if error is None: |
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355 if branch not in ('default', None): |
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356 error = _("push creates new remote head %s " |
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357 "on branch '%s'!") % (short(dhs[0]), branch) |
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358 elif repo[dhs[0]].bookmarks(): |
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359 error = _("push creates new remote head %s " |
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360 "with bookmark '%s'!") % ( |
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361 short(dhs[0]), repo[dhs[0]].bookmarks()[0]) |
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362 else: |
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363 error = _("push creates new remote head %s!" |
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364 ) % short(dhs[0]) |
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365 if unsyncedheads: |
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366 hint = _("pull and merge or" |
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367 " see \"hg help push\" for details about" |
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368 " pushing new heads") |
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369 else: |
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370 hint = _("merge or" |
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371 " see \"hg help push\" for details about" |
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372 " pushing new heads") |
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373 if branch is None: |
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374 repo.ui.note(_("new remote heads:\n")) |
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375 else: |
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376 repo.ui.note(_("new remote heads on branch '%s':\n") % branch) |
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377 for h in dhs: |
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378 repo.ui.note((" %s\n") % short(h)) |
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379 if error: |
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380 raise util.Abort(error, hint=hint) |