Mercurial > hg
annotate mercurial/discovery.py @ 45237:39f4ec4039a8
commitctx: move a special case about files earlier
Same logic as a changeset a bit earlier, the `writefilecopymeta` section is more
a post processing details so we move the conditional about `files` value closer
to the rest of the code computing `files` value.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Thu, 23 Jul 2020 23:40:59 +0200 |
parents | c93dd9d9f1e6 |
children | 122f0b59f5f0 |
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 __future__ import absolute_import |
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9 |
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10 import functools |
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11 |
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12 from .i18n import _ |
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13 from .node import ( |
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14 hex, |
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15 nullid, |
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16 short, |
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17 ) |
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18 |
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19 from . import ( |
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20 bookmarks, |
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21 branchmap, |
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22 error, |
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23 phases, |
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24 pycompat, |
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25 scmutil, |
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26 setdiscovery, |
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27 treediscovery, |
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28 util, |
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29 ) |
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30 |
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31 |
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32 def findcommonincoming(repo, remote, heads=None, force=False, ancestorsof=None): |
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33 """Return a tuple (common, anyincoming, heads) used to identify the common |
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34 subset of nodes between repo and remote. |
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35 |
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36 "common" is a list of (at least) the heads of the common subset. |
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37 "anyincoming" is testable as a boolean indicating if any nodes are missing |
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38 locally. If remote does not support getbundle, this actually is a list of |
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39 roots of the nodes that would be incoming, to be supplied to |
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40 changegroupsubset. No code except for pull should be relying on this fact |
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41 any longer. |
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42 "heads" is either the supplied heads, or else the remote's heads. |
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43 "ancestorsof" if not None, restrict the discovery to a subset defined by |
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44 these nodes. Changeset outside of this set won't be considered (but may |
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45 still appear in "common"). |
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46 |
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47 If you pass heads and they are all known locally, the response lists just |
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48 these heads in "common" and in "heads". |
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49 |
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50 Please use findcommonoutgoing to compute the set of outgoing nodes to give |
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51 extensions a good hook into outgoing. |
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52 """ |
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53 |
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54 if not remote.capable(b'getbundle'): |
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55 return treediscovery.findcommonincoming(repo, remote, heads, force) |
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56 |
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57 if heads: |
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58 knownnode = repo.changelog.hasnode # no nodemap until it is filtered |
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59 if all(knownnode(h) for h in heads): |
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60 return (heads, False, heads) |
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61 |
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62 res = setdiscovery.findcommonheads( |
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63 repo.ui, |
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64 repo, |
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65 remote, |
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66 abortwhenunrelated=not force, |
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67 ancestorsof=ancestorsof, |
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68 ) |
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69 common, anyinc, srvheads = res |
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70 if heads and not anyinc: |
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71 # server could be lying on the advertised heads |
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72 has_node = repo.changelog.hasnode |
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73 anyinc = any(not has_node(n) for n in heads) |
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74 return (list(common), anyinc, heads or list(srvheads)) |
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75 |
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76 |
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77 class outgoing(object): |
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78 '''Represents the result of a findcommonoutgoing() call. |
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79 |
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80 Members: |
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81 |
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82 ancestorsof is a list of the nodes whose ancestors are included in the |
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83 outgoing operation. |
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84 |
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85 missing is a list of those ancestors of ancestorsof that are present in |
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86 local but not in remote. |
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87 |
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88 common is a set containing revs common between the local and the remote |
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89 repository (at least all of those that are ancestors of ancestorsof). |
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90 |
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91 commonheads is the list of heads of common. |
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92 |
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93 excluded is the list of missing changeset that shouldn't be sent |
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94 remotely. |
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95 |
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96 Some members are computed on demand from the heads, unless provided upfront |
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97 by discovery.''' |
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98 |
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99 def __init__( |
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100 self, repo, commonheads=None, ancestorsof=None, missingroots=None |
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101 ): |
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102 # at least one of them must not be set |
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103 assert None in (commonheads, missingroots) |
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104 cl = repo.changelog |
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105 if ancestorsof is None: |
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106 ancestorsof = cl.heads() |
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107 if missingroots: |
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108 discbases = [] |
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109 for n in missingroots: |
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110 discbases.extend([p for p in cl.parents(n) if p != nullid]) |
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111 # TODO remove call to nodesbetween. |
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112 # TODO populate attributes on outgoing instance instead of setting |
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113 # discbases. |
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114 csets, roots, heads = cl.nodesbetween(missingroots, ancestorsof) |
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115 included = set(csets) |
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116 ancestorsof = heads |
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117 commonheads = [n for n in discbases if n not in included] |
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118 elif not commonheads: |
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119 commonheads = [nullid] |
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120 self.commonheads = commonheads |
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121 self.ancestorsof = ancestorsof |
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122 self._revlog = cl |
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123 self._common = None |
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124 self._missing = None |
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125 self.excluded = [] |
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126 |
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127 def _computecommonmissing(self): |
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128 sets = self._revlog.findcommonmissing( |
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129 self.commonheads, self.ancestorsof |
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130 ) |
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131 self._common, self._missing = sets |
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132 |
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133 @util.propertycache |
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134 def common(self): |
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135 if self._common is None: |
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136 self._computecommonmissing() |
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137 return self._common |
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138 |
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139 @util.propertycache |
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140 def missing(self): |
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141 if self._missing is None: |
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142 self._computecommonmissing() |
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143 return self._missing |
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144 |
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145 @property |
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146 def missingheads(self): |
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147 util.nouideprecwarn( |
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148 b'outgoing.missingheads never contained what the name suggests and ' |
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149 b'was renamed to outgoing.ancestorsof. check your code for ' |
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150 b'correctness.', |
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151 b'5.5', |
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152 stacklevel=2, |
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153 ) |
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154 return self.ancestorsof |
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155 |
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156 |
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157 def findcommonoutgoing( |
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158 repo, other, onlyheads=None, force=False, commoninc=None, portable=False |
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159 ): |
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160 '''Return an outgoing instance to identify the nodes present in repo but |
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161 not in other. |
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162 |
16683 | 163 If onlyheads is given, only nodes ancestral to nodes in onlyheads |
164 (inclusive) are included. If you already know the local repo's heads, | |
165 passing them in onlyheads is faster than letting them be recomputed here. | |
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166 |
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167 If commoninc is given, it must be the result of a prior call to |
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168 findcommonincoming(repo, other, force) to avoid recomputing it here. |
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169 |
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170 If portable is given, compute more conservative common and ancestorsof, |
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171 to make bundles created from the instance more portable.''' |
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172 # declare an empty outgoing object to be filled later |
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173 og = outgoing(repo, None, None) |
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174 |
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175 # get common set if not provided |
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176 if commoninc is None: |
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177 commoninc = findcommonincoming( |
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178 repo, other, force=force, ancestorsof=onlyheads |
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179 ) |
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180 og.commonheads, _any, _hds = commoninc |
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181 |
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182 # compute outgoing |
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183 mayexclude = repo._phasecache.phaseroots[phases.secret] or repo.obsstore |
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184 if not mayexclude: |
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185 og.ancestorsof = onlyheads or repo.heads() |
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186 elif onlyheads is None: |
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187 # use visible heads as it should be cached |
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188 og.ancestorsof = repo.filtered(b"served").heads() |
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189 og.excluded = [ctx.node() for ctx in repo.set(b'secret() or extinct()')] |
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190 else: |
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191 # compute common, missing and exclude secret stuff |
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192 sets = repo.changelog.findcommonmissing(og.commonheads, onlyheads) |
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193 og._common, allmissing = sets |
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194 og._missing = missing = [] |
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195 og.excluded = excluded = [] |
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196 for node in allmissing: |
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197 ctx = repo[node] |
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198 if ctx.phase() >= phases.secret or ctx.extinct(): |
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199 excluded.append(node) |
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200 else: |
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201 missing.append(node) |
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202 if len(missing) == len(allmissing): |
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203 ancestorsof = onlyheads |
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204 else: # update missing heads |
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205 ancestorsof = phases.newheads(repo, onlyheads, excluded) |
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206 og.ancestorsof = ancestorsof |
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207 if portable: |
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208 # recompute common and ancestorsof as if -r<rev> had been given for |
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209 # each head of missing, and --base <rev> for each head of the proper |
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210 # ancestors of missing |
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211 og._computecommonmissing() |
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212 cl = repo.changelog |
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213 missingrevs = {cl.rev(n) for n in og._missing} |
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214 og._common = set(cl.ancestors(missingrevs)) - missingrevs |
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215 commonheads = set(og.commonheads) |
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216 og.ancestorsof = [h for h in og.ancestorsof if h not in commonheads] |
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217 |
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218 return og |
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219 |
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220 |
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221 def _headssummary(pushop): |
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222 """compute a summary of branch and heads status before and after push |
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223 |
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224 return {'branch': ([remoteheads], [newheads], |
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225 [unsyncedheads], [discardedheads])} mapping |
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226 |
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227 - branch: the branch name, |
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228 - remoteheads: the list of remote heads known locally |
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229 None if the branch is new, |
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230 - newheads: the new remote heads (known locally) with outgoing pushed, |
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231 - unsyncedheads: the list of remote heads unknown locally, |
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232 - discardedheads: the list of heads made obsolete by the push. |
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233 """ |
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234 repo = pushop.repo.unfiltered() |
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235 remote = pushop.remote |
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236 outgoing = pushop.outgoing |
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237 cl = repo.changelog |
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238 headssum = {} |
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239 missingctx = set() |
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240 # A. Create set of branches involved in the push. |
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241 branches = set() |
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242 for n in outgoing.missing: |
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243 ctx = repo[n] |
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244 missingctx.add(ctx) |
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245 branches.add(ctx.branch()) |
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246 |
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247 with remote.commandexecutor() as e: |
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248 remotemap = e.callcommand(b'branchmap', {}).result() |
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249 |
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250 knownnode = cl.hasnode # do not use nodemap until it is filtered |
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251 # A. register remote heads of branches which are in outgoing set |
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252 for branch, heads in pycompat.iteritems(remotemap): |
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253 # don't add head info about branches which we don't have locally |
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254 if branch not in branches: |
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255 continue |
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256 known = [] |
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257 unsynced = [] |
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258 for h in heads: |
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259 if knownnode(h): |
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260 known.append(h) |
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261 else: |
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262 unsynced.append(h) |
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263 headssum[branch] = (known, list(known), unsynced) |
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264 |
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265 # B. add new branch data |
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266 for branch in branches: |
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267 if branch not in headssum: |
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268 headssum[branch] = (None, [], []) |
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269 |
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270 # C. Update newmap with outgoing changes. |
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271 # This will possibly add new heads and remove existing ones. |
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272 newmap = branchmap.remotebranchcache( |
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273 (branch, heads[1]) |
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274 for branch, heads in pycompat.iteritems(headssum) |
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275 if heads[0] is not None |
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276 ) |
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277 newmap.update(repo, (ctx.rev() for ctx in missingctx)) |
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278 for branch, newheads in pycompat.iteritems(newmap): |
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279 headssum[branch][1][:] = newheads |
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280 for branch, items in pycompat.iteritems(headssum): |
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281 for l in items: |
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282 if l is not None: |
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283 l.sort() |
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284 headssum[branch] = items + ([],) |
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285 |
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286 # If there are no obsstore, no post processing are needed. |
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287 if repo.obsstore: |
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288 torev = repo.changelog.rev |
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289 futureheads = {torev(h) for h in outgoing.ancestorsof} |
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290 futureheads |= {torev(h) for h in outgoing.commonheads} |
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291 allfuturecommon = repo.changelog.ancestors(futureheads, inclusive=True) |
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292 for branch, heads in sorted(pycompat.iteritems(headssum)): |
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293 remoteheads, newheads, unsyncedheads, placeholder = heads |
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294 result = _postprocessobsolete(pushop, allfuturecommon, newheads) |
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295 headssum[branch] = ( |
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296 remoteheads, |
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297 sorted(result[0]), |
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298 unsyncedheads, |
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299 sorted(result[1]), |
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300 ) |
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301 return headssum |
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302 |
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303 |
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304 def _oldheadssummary(repo, remoteheads, outgoing, inc=False): |
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305 """Compute branchmapsummary for repo without branchmap support""" |
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306 |
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307 # 1-4b. old servers: Check for new topological heads. |
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308 # Construct {old,new}map with branch = None (topological branch). |
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309 # (code based on update) |
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310 knownnode = repo.changelog.hasnode # no nodemap until it is filtered |
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311 oldheads = sorted(h for h in remoteheads if knownnode(h)) |
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312 # all nodes in outgoing.missing are children of either: |
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313 # - an element of oldheads |
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314 # - another element of outgoing.missing |
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315 # - nullrev |
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316 # This explains why the new head are very simple to compute. |
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317 r = repo.set(b'heads(%ln + %ln)', oldheads, outgoing.missing) |
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318 newheads = sorted(c.node() for c in r) |
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319 # set some unsynced head to issue the "unsynced changes" warning |
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320 if inc: |
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321 unsynced = [None] |
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322 else: |
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323 unsynced = [] |
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324 return {None: (oldheads, newheads, unsynced, [])} |
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325 |
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326 |
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327 def _nowarnheads(pushop): |
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328 # Compute newly pushed bookmarks. We don't warn about bookmarked heads. |
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329 repo = pushop.repo.unfiltered() |
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330 remote = pushop.remote |
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331 localbookmarks = repo._bookmarks |
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332 |
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333 with remote.commandexecutor() as e: |
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334 remotebookmarks = e.callcommand( |
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335 b'listkeys', {b'namespace': b'bookmarks',} |
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336 ).result() |
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337 |
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338 bookmarkedheads = set() |
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339 |
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340 # internal config: bookmarks.pushing |
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341 newbookmarks = [ |
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342 localbookmarks.expandname(b) |
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343 for b in pushop.ui.configlist(b'bookmarks', b'pushing') |
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344 ] |
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345 |
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346 for bm in localbookmarks: |
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347 rnode = remotebookmarks.get(bm) |
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348 if rnode and rnode in repo: |
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349 lctx, rctx = repo[localbookmarks[bm]], repo[rnode] |
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350 if bookmarks.validdest(repo, rctx, lctx): |
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351 bookmarkedheads.add(lctx.node()) |
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352 else: |
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353 if bm in newbookmarks and bm not in remotebookmarks: |
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354 bookmarkedheads.add(localbookmarks[bm]) |
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355 |
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356 return bookmarkedheads |
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357 |
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358 |
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359 def checkheads(pushop): |
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360 """Check that a push won't add any outgoing head |
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361 |
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362 raise Abort error and display ui message as needed. |
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363 """ |
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364 |
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365 repo = pushop.repo.unfiltered() |
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366 remote = pushop.remote |
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367 outgoing = pushop.outgoing |
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368 remoteheads = pushop.remoteheads |
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369 newbranch = pushop.newbranch |
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370 inc = bool(pushop.incoming) |
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371 |
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372 # Check for each named branch if we're creating new remote heads. |
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373 # To be a remote head after push, node must be either: |
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374 # - unknown locally |
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375 # - a local outgoing head descended from update |
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376 # - a remote head that's known locally and not |
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377 # ancestral to an outgoing head |
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378 if remoteheads == [nullid]: |
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379 # remote is empty, nothing to check. |
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380 return |
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381 |
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382 if remote.capable(b'branchmap'): |
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383 headssum = _headssummary(pushop) |
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384 else: |
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385 headssum = _oldheadssummary(repo, remoteheads, outgoing, inc) |
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386 pushop.pushbranchmap = headssum |
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387 newbranches = [ |
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388 branch |
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389 for branch, heads in pycompat.iteritems(headssum) |
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390 if heads[0] is None |
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391 ] |
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392 # 1. Check for new branches on the remote. |
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393 if newbranches and not newbranch: # new branch requires --new-branch |
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394 branchnames = b', '.join(sorted(newbranches)) |
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395 # Calculate how many of the new branches are closed branches |
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396 closedbranches = set() |
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397 for tag, heads, tip, isclosed in repo.branchmap().iterbranches(): |
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398 if isclosed: |
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399 closedbranches.add(tag) |
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400 closedbranches = closedbranches & set(newbranches) |
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401 if closedbranches: |
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402 errmsg = _(b"push creates new remote branches: %s (%d closed)!") % ( |
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403 branchnames, |
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404 len(closedbranches), |
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405 ) |
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406 else: |
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407 errmsg = _(b"push creates new remote branches: %s!") % branchnames |
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408 hint = _(b"use 'hg push --new-branch' to create new remote branches") |
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409 raise error.Abort(errmsg, hint=hint) |
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Added a lot of comments to changegroupsubset.
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|
410 |
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411 # 2. Find heads that we need not warn about |
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412 nowarnheads = _nowarnheads(pushop) |
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|
413 |
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414 # 3. Check for new heads. |
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415 # If there are more heads after the push than before, a suitable |
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416 # error message, depending on unsynced status, is displayed. |
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417 errormsg = None |
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418 for branch, heads in sorted(pycompat.iteritems(headssum)): |
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419 remoteheads, newheads, unsyncedheads, discardedheads = heads |
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420 # add unsynced data |
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421 if remoteheads is None: |
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422 oldhs = set() |
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423 else: |
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424 oldhs = set(remoteheads) |
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425 oldhs.update(unsyncedheads) |
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426 dhs = None # delta heads, the new heads on branch |
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427 newhs = set(newheads) |
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428 newhs.update(unsyncedheads) |
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429 if unsyncedheads: |
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430 if None in unsyncedheads: |
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431 # old remote, no heads data |
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432 heads = None |
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433 else: |
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434 heads = scmutil.nodesummaries(repo, unsyncedheads) |
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435 if heads is None: |
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436 repo.ui.status( |
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437 _(b"remote has heads that are not known locally\n") |
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438 ) |
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439 elif branch is None: |
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440 repo.ui.status( |
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441 _(b"remote has heads that are not known locally: %s\n") |
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442 % heads |
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443 ) |
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444 else: |
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445 repo.ui.status( |
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446 _( |
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447 b"remote has heads on branch '%s' that are " |
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448 b"not known locally: %s\n" |
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449 ) |
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450 % (branch, heads) |
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451 ) |
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452 if remoteheads is None: |
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453 if len(newhs) > 1: |
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454 dhs = list(newhs) |
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455 if errormsg is None: |
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456 errormsg = ( |
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457 _(b"push creates new branch '%s' with multiple heads") |
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458 % branch |
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459 ) |
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460 hint = _( |
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461 b"merge or" |
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462 b" see 'hg help push' for details about" |
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463 b" pushing new heads" |
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464 ) |
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465 elif len(newhs) > len(oldhs): |
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466 # remove bookmarked or existing remote heads from the new heads list |
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467 dhs = sorted(newhs - nowarnheads - oldhs) |
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468 if dhs: |
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469 if errormsg is None: |
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470 if branch not in (b'default', None): |
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471 errormsg = _( |
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472 b"push creates new remote head %s on branch '%s'!" |
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473 ) % (short(dhs[0]), branch,) |
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474 elif repo[dhs[0]].bookmarks(): |
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475 errormsg = _( |
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476 b"push creates new remote head %s " |
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477 b"with bookmark '%s'!" |
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478 ) % (short(dhs[0]), repo[dhs[0]].bookmarks()[0]) |
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479 else: |
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480 errormsg = _(b"push creates new remote head %s!") % short( |
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481 dhs[0] |
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482 ) |
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483 if unsyncedheads: |
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484 hint = _( |
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485 b"pull and merge or" |
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486 b" see 'hg help push' for details about" |
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487 b" pushing new heads" |
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488 ) |
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489 else: |
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490 hint = _( |
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491 b"merge or" |
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492 b" see 'hg help push' for details about" |
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493 b" pushing new heads" |
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494 ) |
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495 if branch is None: |
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496 repo.ui.note(_(b"new remote heads:\n")) |
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497 else: |
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498 repo.ui.note(_(b"new remote heads on branch '%s':\n") % branch) |
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499 for h in dhs: |
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500 repo.ui.note(b" %s\n" % short(h)) |
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501 if errormsg: |
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502 raise error.Abort(errormsg, hint=hint) |
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503 |
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504 |
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505 def _postprocessobsolete(pushop, futurecommon, candidate_newhs): |
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506 """post process the list of new heads with obsolescence information |
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507 |
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508 Exists as a sub-function to contain the complexity and allow extensions to |
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509 experiment with smarter logic. |
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510 |
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511 Returns (newheads, discarded_heads) tuple |
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512 """ |
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513 # known issue |
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514 # |
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515 # * We "silently" skip processing on all changeset unknown locally |
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516 # |
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517 # * if <nh> is public on the remote, it won't be affected by obsolete |
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518 # marker and a new is created |
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519 |
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520 # define various utilities and containers |
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521 repo = pushop.repo |
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522 unfi = repo.unfiltered() |
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523 torev = unfi.changelog.index.get_rev |
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524 public = phases.public |
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525 getphase = unfi._phasecache.phase |
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526 ispublic = lambda r: getphase(unfi, r) == public |
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527 ispushed = lambda n: torev(n) in futurecommon |
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528 hasoutmarker = functools.partial(pushingmarkerfor, unfi.obsstore, ispushed) |
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529 successorsmarkers = unfi.obsstore.successors |
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530 newhs = set() # final set of new heads |
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531 discarded = set() # new head of fully replaced branch |
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532 |
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533 localcandidate = set() # candidate heads known locally |
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534 unknownheads = set() # candidate heads unknown locally |
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535 for h in candidate_newhs: |
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536 if h in unfi: |
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537 localcandidate.add(h) |
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538 else: |
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539 if successorsmarkers.get(h) is not None: |
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540 msg = ( |
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541 b'checkheads: remote head unknown locally has' |
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542 b' local marker: %s\n' |
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543 ) |
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544 repo.ui.debug(msg % hex(h)) |
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545 unknownheads.add(h) |
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546 |
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547 # fast path the simple case |
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548 if len(localcandidate) == 1: |
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549 return unknownheads | set(candidate_newhs), set() |
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550 |
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551 # actually process branch replacement |
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552 while localcandidate: |
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553 nh = localcandidate.pop() |
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554 current_branch = unfi[nh].branch() |
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555 # run this check early to skip the evaluation of the whole branch |
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556 if torev(nh) in futurecommon or ispublic(torev(nh)): |
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557 newhs.add(nh) |
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558 continue |
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559 |
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560 # Get all revs/nodes on the branch exclusive to this head |
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561 # (already filtered heads are "ignored")) |
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562 branchrevs = unfi.revs( |
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563 b'only(%n, (%ln+%ln))', nh, localcandidate, newhs |
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564 ) |
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565 |
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566 branchnodes = [] |
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567 for r in branchrevs: |
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568 c = unfi[r] |
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569 if c.branch() == current_branch: |
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570 branchnodes.append(c.node()) |
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571 |
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572 # The branch won't be hidden on the remote if |
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573 # * any part of it is public, |
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574 # * any part of it is considered part of the result by previous logic, |
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575 # * if we have no markers to push to obsolete it. |
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576 if ( |
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577 any(ispublic(r) for r in branchrevs) |
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578 or any(torev(n) in futurecommon for n in branchnodes) |
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579 or any(not hasoutmarker(n) for n in branchnodes) |
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580 ): |
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581 newhs.add(nh) |
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582 else: |
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583 # note: there is a corner case if there is a merge in the branch. |
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584 # we might end up with -more- heads. However, these heads are not |
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585 # "added" by the push, but more by the "removal" on the remote so I |
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586 # think is a okay to ignore them, |
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587 discarded.add(nh) |
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588 newhs |= unknownheads |
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589 return newhs, discarded |
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590 |
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591 |
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592 def pushingmarkerfor(obsstore, ispushed, node): |
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593 """true if some markers are to be pushed for node |
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594 |
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595 We cannot just look in to the pushed obsmarkers from the pushop because |
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596 discovery might have filtered relevant markers. In addition listing all |
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597 markers relevant to all changesets in the pushed set would be too expensive |
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598 (O(len(repo))) |
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599 |
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600 (note: There are cache opportunity in this function. but it would requires |
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601 a two dimensional stack.) |
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602 """ |
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603 successorsmarkers = obsstore.successors |
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604 stack = [node] |
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605 seen = set(stack) |
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606 while stack: |
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607 current = stack.pop() |
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608 if ispushed(current): |
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609 return True |
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610 markers = successorsmarkers.get(current, ()) |
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611 # markers fields = ('prec', 'succs', 'flag', 'meta', 'date', 'parents') |
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612 for m in markers: |
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613 nexts = m[1] # successors |
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614 if not nexts: # this is a prune marker |
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615 nexts = m[5] or () # parents |
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616 for n in nexts: |
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617 if n not in seen: |
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618 seen.add(n) |
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619 stack.append(n) |
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620 return False |