Mercurial > hg
annotate mercurial/discovery.py @ 32129:f0ea0f642627
py3: make posix.getuser return a bytes
author | Pulkit Goyal <7895pulkit@gmail.com> |
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date | Fri, 21 Apr 2017 00:53:38 +0530 |
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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 setdiscovery, |
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25 treediscovery, |
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26 util, |
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27 ) |
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28 |
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29 def findcommonincoming(repo, remote, heads=None, force=False): |
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30 """Return a tuple (common, anyincoming, heads) used to identify the common |
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31 subset of nodes between repo and remote. |
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32 |
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33 "common" is a list of (at least) the heads of the common subset. |
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34 "anyincoming" is testable as a boolean indicating if any nodes are missing |
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35 locally. If remote does not support getbundle, this actually is a list of |
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36 roots of the nodes that would be incoming, to be supplied to |
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37 changegroupsubset. No code except for pull should be relying on this fact |
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38 any longer. |
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39 "heads" is either the supplied heads, or else the remote's heads. |
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40 |
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41 If you pass heads and they are all known locally, the response lists just |
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42 these heads in "common" and in "heads". |
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43 |
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44 Please use findcommonoutgoing to compute the set of outgoing nodes to give |
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45 extensions a good hook into outgoing. |
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46 """ |
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47 |
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48 if not remote.capable('getbundle'): |
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49 return treediscovery.findcommonincoming(repo, remote, heads, force) |
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50 |
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51 if heads: |
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52 allknown = True |
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53 knownnode = repo.changelog.hasnode # no nodemap until it is filtered |
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54 for h in heads: |
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55 if not knownnode(h): |
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56 allknown = False |
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57 break |
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58 if allknown: |
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59 return (heads, False, heads) |
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60 |
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61 res = setdiscovery.findcommonheads(repo.ui, repo, remote, |
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62 abortwhenunrelated=not force) |
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63 common, anyinc, srvheads = res |
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64 return (list(common), anyinc, heads or list(srvheads)) |
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65 |
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66 class outgoing(object): |
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67 '''Represents the set of nodes present in a local repo but not in a |
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68 (possibly) remote one. |
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69 |
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70 Members: |
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71 |
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72 missing is a list of all nodes present in local but not in remote. |
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73 common is a list of all nodes shared between the two repos. |
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74 excluded is the list of missing changeset that shouldn't be sent remotely. |
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75 missingheads is the list of heads of missing. |
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76 commonheads is the list of heads of common. |
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77 |
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78 The sets are computed on demand from the heads, unless provided upfront |
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79 by discovery.''' |
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80 |
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81 def __init__(self, repo, commonheads=None, missingheads=None, |
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82 missingroots=None): |
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83 # at least one of them must not be set |
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84 assert None in (commonheads, missingroots) |
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85 cl = repo.changelog |
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86 if missingheads is None: |
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87 missingheads = cl.heads() |
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88 if missingroots: |
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89 discbases = [] |
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90 for n in missingroots: |
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91 discbases.extend([p for p in cl.parents(n) if p != nullid]) |
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92 # TODO remove call to nodesbetween. |
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93 # TODO populate attributes on outgoing instance instead of setting |
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94 # discbases. |
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95 csets, roots, heads = cl.nodesbetween(missingroots, missingheads) |
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96 included = set(csets) |
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97 missingheads = heads |
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98 commonheads = [n for n in discbases if n not in included] |
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99 elif not commonheads: |
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100 commonheads = [nullid] |
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101 self.commonheads = commonheads |
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102 self.missingheads = missingheads |
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103 self._revlog = cl |
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104 self._common = None |
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105 self._missing = None |
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106 self.excluded = [] |
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107 |
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108 def _computecommonmissing(self): |
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109 sets = self._revlog.findcommonmissing(self.commonheads, |
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110 self.missingheads) |
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111 self._common, self._missing = sets |
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112 |
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113 @util.propertycache |
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114 def common(self): |
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115 if self._common is None: |
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116 self._computecommonmissing() |
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117 return self._common |
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118 |
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119 @util.propertycache |
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120 def missing(self): |
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121 if self._missing is None: |
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122 self._computecommonmissing() |
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123 return self._missing |
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124 |
16683 | 125 def findcommonoutgoing(repo, other, onlyheads=None, force=False, |
16746 | 126 commoninc=None, portable=False): |
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127 '''Return an outgoing instance to identify the nodes present in repo but |
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128 not in other. |
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129 |
16683 | 130 If onlyheads is given, only nodes ancestral to nodes in onlyheads |
131 (inclusive) are included. If you already know the local repo's heads, | |
132 passing them in onlyheads is faster than letting them be recomputed here. | |
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133 |
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134 If commoninc is given, it must be the result of a prior call to |
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135 findcommonincoming(repo, other, force) to avoid recomputing it here. |
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136 |
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137 If portable is given, compute more conservative common and missingheads, |
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138 to make bundles created from the instance more portable.''' |
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139 # declare an empty outgoing object to be filled later |
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140 og = outgoing(repo, None, None) |
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141 |
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142 # get common set if not provided |
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143 if commoninc is None: |
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144 commoninc = findcommonincoming(repo, other, force=force) |
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145 og.commonheads, _any, _hds = commoninc |
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146 |
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147 # compute outgoing |
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148 mayexclude = (repo._phasecache.phaseroots[phases.secret] or repo.obsstore) |
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149 if not mayexclude: |
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150 og.missingheads = onlyheads or repo.heads() |
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151 elif onlyheads is None: |
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152 # use visible heads as it should be cached |
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153 og.missingheads = repo.filtered("served").heads() |
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154 og.excluded = [ctx.node() for ctx in repo.set('secret() or extinct()')] |
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155 else: |
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156 # compute common, missing and exclude secret stuff |
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157 sets = repo.changelog.findcommonmissing(og.commonheads, onlyheads) |
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158 og._common, allmissing = sets |
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159 og._missing = missing = [] |
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160 og.excluded = excluded = [] |
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161 for node in allmissing: |
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162 ctx = repo[node] |
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163 if ctx.phase() >= phases.secret or ctx.extinct(): |
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164 excluded.append(node) |
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165 else: |
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166 missing.append(node) |
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167 if len(missing) == len(allmissing): |
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168 missingheads = onlyheads |
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169 else: # update missing heads |
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170 missingheads = phases.newheads(repo, onlyheads, excluded) |
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171 og.missingheads = missingheads |
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172 if portable: |
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173 # recompute common and missingheads as if -r<rev> had been given for |
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174 # each head of missing, and --base <rev> for each head of the proper |
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175 # ancestors of missing |
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176 og._computecommonmissing() |
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177 cl = repo.changelog |
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178 missingrevs = set(cl.rev(n) for n in og._missing) |
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179 og._common = set(cl.ancestors(missingrevs)) - missingrevs |
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180 commonheads = set(og.commonheads) |
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181 og.missingheads = [h for h in og.missingheads if h not in commonheads] |
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182 |
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183 return og |
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184 |
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185 def _headssummary(repo, remote, outgoing): |
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186 """compute a summary of branch and heads status before and after push |
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187 |
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188 return {'branch': ([remoteheads], [newheads], [unsyncedheads])} mapping |
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189 |
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190 - branch: the branch name |
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191 - remoteheads: the list of remote heads known locally |
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192 None if the branch is new |
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193 - newheads: the new remote heads (known locally) with outgoing pushed |
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194 - unsyncedheads: the list of remote heads unknown locally. |
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195 """ |
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196 cl = repo.changelog |
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197 headssum = {} |
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198 # A. Create set of branches involved in the push. |
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199 branches = set(repo[n].branch() for n in outgoing.missing) |
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200 remotemap = remote.branchmap() |
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201 newbranches = branches - set(remotemap) |
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202 branches.difference_update(newbranches) |
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203 |
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204 # A. register remote heads |
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205 remotebranches = set() |
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206 for branch, heads in remote.branchmap().iteritems(): |
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207 remotebranches.add(branch) |
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208 known = [] |
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209 unsynced = [] |
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210 knownnode = cl.hasnode # do not use nodemap until it is filtered |
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211 for h in heads: |
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212 if knownnode(h): |
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213 known.append(h) |
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214 else: |
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215 unsynced.append(h) |
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216 headssum[branch] = (known, list(known), unsynced) |
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217 # B. add new branch data |
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218 missingctx = list(repo[n] for n in outgoing.missing) |
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219 touchedbranches = set() |
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220 for ctx in missingctx: |
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221 branch = ctx.branch() |
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222 touchedbranches.add(branch) |
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223 if branch not in headssum: |
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224 headssum[branch] = (None, [], []) |
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225 |
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226 # C drop data about untouched branches: |
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227 for branch in remotebranches - touchedbranches: |
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228 del headssum[branch] |
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229 |
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230 # D. Update newmap with outgoing changes. |
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231 # This will possibly add new heads and remove existing ones. |
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232 newmap = branchmap.branchcache((branch, heads[1]) |
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233 for branch, heads in headssum.iteritems() |
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234 if heads[0] is not None) |
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235 newmap.update(repo, (ctx.rev() for ctx in missingctx)) |
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236 for branch, newheads in newmap.iteritems(): |
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237 headssum[branch][1][:] = newheads |
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238 return headssum |
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239 |
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240 def _oldheadssummary(repo, remoteheads, outgoing, inc=False): |
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241 """Compute branchmapsummary for repo without branchmap support""" |
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242 |
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243 # 1-4b. old servers: Check for new topological heads. |
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244 # Construct {old,new}map with branch = None (topological branch). |
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245 # (code based on update) |
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246 knownnode = repo.changelog.hasnode # no nodemap until it is filtered |
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247 oldheads = set(h for h in remoteheads if knownnode(h)) |
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248 # all nodes in outgoing.missing are children of either: |
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249 # - an element of oldheads |
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250 # - another element of outgoing.missing |
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251 # - nullrev |
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252 # This explains why the new head are very simple to compute. |
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253 r = repo.set('heads(%ln + %ln)', oldheads, outgoing.missing) |
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254 newheads = list(c.node() for c in r) |
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255 # set some unsynced head to issue the "unsynced changes" warning |
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256 if inc: |
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257 unsynced = set([None]) |
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258 else: |
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259 unsynced = set() |
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260 return {None: (oldheads, newheads, unsynced)} |
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261 |
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262 def _nowarnheads(pushop): |
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263 # Compute newly pushed bookmarks. We don't warn about bookmarked heads. |
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264 repo = pushop.repo.unfiltered() |
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265 remote = pushop.remote |
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266 localbookmarks = repo._bookmarks |
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267 remotebookmarks = remote.listkeys('bookmarks') |
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268 bookmarkedheads = set() |
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269 |
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270 # internal config: bookmarks.pushing |
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271 newbookmarks = [localbookmarks.expandname(b) |
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272 for b in pushop.ui.configlist('bookmarks', 'pushing')] |
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273 |
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274 for bm in localbookmarks: |
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275 rnode = remotebookmarks.get(bm) |
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276 if rnode and rnode in repo: |
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277 lctx, rctx = repo[bm], repo[rnode] |
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278 if bookmarks.validdest(repo, rctx, lctx): |
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279 bookmarkedheads.add(lctx.node()) |
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280 else: |
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281 if bm in newbookmarks and bm not in remotebookmarks: |
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282 bookmarkedheads.add(repo[bm].node()) |
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283 |
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284 return bookmarkedheads |
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285 |
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286 def checkheads(pushop): |
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287 """Check that a push won't add any outgoing head |
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288 |
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289 raise Abort error and display ui message as needed. |
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290 """ |
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291 |
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292 repo = pushop.repo.unfiltered() |
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293 remote = pushop.remote |
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294 outgoing = pushop.outgoing |
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295 remoteheads = pushop.remoteheads |
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296 newbranch = pushop.newbranch |
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297 inc = bool(pushop.incoming) |
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298 |
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299 # Check for each named branch if we're creating new remote heads. |
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300 # To be a remote head after push, node must be either: |
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301 # - unknown locally |
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302 # - a local outgoing head descended from update |
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303 # - a remote head that's known locally and not |
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304 # ancestral to an outgoing head |
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305 if remoteheads == [nullid]: |
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306 # remote is empty, nothing to check. |
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307 return |
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308 |
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309 if remote.capable('branchmap'): |
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310 headssum = _headssummary(repo, remote, outgoing) |
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311 else: |
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312 headssum = _oldheadssummary(repo, remoteheads, outgoing, inc) |
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313 newbranches = [branch for branch, heads in headssum.iteritems() |
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314 if heads[0] is None] |
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315 # 1. Check for new branches on the remote. |
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316 if newbranches and not newbranch: # new branch requires --new-branch |
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317 branchnames = ', '.join(sorted(newbranches)) |
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318 raise error.Abort(_("push creates new remote branches: %s!") |
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319 % branchnames, |
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320 hint=_("use 'hg push --new-branch' to create" |
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321 " new remote branches")) |
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322 |
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323 # 2. Find heads that we need not warn about |
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324 nowarnheads = _nowarnheads(pushop) |
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325 |
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326 # 3. Check for new heads. |
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327 # If there are more heads after the push than before, a suitable |
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328 # error message, depending on unsynced status, is displayed. |
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329 errormsg = None |
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330 # If there is no obsstore, allfuturecommon won't be used, so no |
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331 # need to compute it. |
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332 if repo.obsstore: |
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|
333 allmissing = set(outgoing.missing) |
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|
334 cctx = repo.set('%ld', outgoing.common) |
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|
335 allfuturecommon = set(c.node() for c in cctx) |
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|
336 allfuturecommon.update(allmissing) |
18361
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discovery: process heads in sorted order
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337 for branch, heads in sorted(headssum.iteritems()): |
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338 remoteheads, newheads, unsyncedheads = heads |
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339 candidate_newhs = set(newheads) |
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340 # add unsynced data |
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341 if remoteheads is None: |
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342 oldhs = set() |
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343 else: |
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344 oldhs = set(remoteheads) |
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345 oldhs.update(unsyncedheads) |
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346 candidate_newhs.update(unsyncedheads) |
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347 dhs = None # delta heads, the new heads on branch |
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348 if not repo.obsstore: |
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349 discardedheads = set() |
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350 newhs = candidate_newhs |
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351 else: |
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352 newhs, discardedheads = _postprocessobsolete(pushop, |
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353 allfuturecommon, |
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354 candidate_newhs) |
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355 unsynced = sorted(h for h in unsyncedheads if h not in discardedheads) |
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356 if unsynced: |
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357 if None in unsynced: |
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358 # old remote, no heads data |
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359 heads = None |
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360 elif len(unsynced) <= 4 or repo.ui.verbose: |
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361 heads = ' '.join(short(h) for h in unsynced) |
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362 else: |
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363 heads = (' '.join(short(h) for h in unsynced[:4]) + |
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|
364 ' ' + _("and %s others") % (len(unsynced) - 4)) |
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365 if heads is None: |
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366 repo.ui.status(_("remote has heads that are " |
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367 "not known locally\n")) |
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368 elif branch is None: |
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369 repo.ui.status(_("remote has heads that are " |
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370 "not known locally: %s\n") % heads) |
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371 else: |
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372 repo.ui.status(_("remote has heads on branch '%s' that are " |
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373 "not known locally: %s\n") % (branch, heads)) |
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374 if remoteheads is None: |
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375 if len(newhs) > 1: |
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|
376 dhs = list(newhs) |
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377 if errormsg is None: |
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378 errormsg = (_("push creates new branch '%s' " |
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|
379 "with multiple heads") % (branch)) |
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|
380 hint = _("merge or" |
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|
381 " see 'hg help push' for details about" |
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|
382 " pushing new heads") |
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383 elif len(newhs) > len(oldhs): |
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|
384 # remove bookmarked or existing remote heads from the new heads list |
26862
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discovery: factor out calculation of heads to not warn about
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|
385 dhs = sorted(newhs - nowarnheads - oldhs) |
16835
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Levi Bard <levi@unity3d.com>
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|
386 if dhs: |
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387 if errormsg is None: |
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|
388 if branch not in ('default', None): |
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389 errormsg = _("push creates new remote head %s " |
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390 "on branch '%s'!") % (short(dhs[0]), branch) |
21580
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discovery: if a push would create a new head, mention the bookmark name if any
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391 elif repo[dhs[0]].bookmarks(): |
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392 errormsg = _("push creates new remote head %s " |
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|
393 "with bookmark '%s'!") % ( |
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394 short(dhs[0]), repo[dhs[0]].bookmarks()[0]) |
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395 else: |
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396 errormsg = _("push creates new remote head %s!" |
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397 ) % short(dhs[0]) |
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398 if unsyncedheads: |
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|
399 hint = _("pull and merge or" |
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400 " see 'hg help push' for details about" |
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401 " pushing new heads") |
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402 else: |
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|
403 hint = _("merge or" |
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404 " see 'hg help push' for details about" |
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|
405 " pushing new heads") |
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406 if branch is None: |
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407 repo.ui.note(_("new remote heads:\n")) |
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408 else: |
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409 repo.ui.note(_("new remote heads on branch '%s':\n") % branch) |
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410 for h in dhs: |
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411 repo.ui.note((" %s\n") % short(h)) |
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412 if errormsg: |
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error: get Abort from 'error' instead of 'util'
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413 raise error.Abort(errormsg, hint=hint) |
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414 |
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415 def _postprocessobsolete(pushop, futurecommon, candidate_newhs): |
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416 """post process the list of new heads with obsolescence information |
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417 |
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418 Exists as a sub-function to contain the complexity and allow extensions to |
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419 experiment with smarter logic. |
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420 |
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421 Returns (newheads, discarded_heads) tuple |
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422 """ |
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423 # known issue |
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424 # |
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425 # * We "silently" skip processing on all changeset unknown locally |
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426 # |
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427 # * if <nh> is public on the remote, it won't be affected by obsolete |
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428 # marker and a new is created |
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429 |
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430 # define various utilities and containers |
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431 repo = pushop.repo |
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432 unfi = repo.unfiltered() |
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433 tonode = unfi.changelog.node |
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434 public = phases.public |
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435 getphase = unfi._phasecache.phase |
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436 ispublic = (lambda r: getphase(unfi, r) == public) |
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437 hasoutmarker = functools.partial(pushingmarkerfor, unfi.obsstore, |
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438 futurecommon) |
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439 successorsmarkers = unfi.obsstore.successors |
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440 newhs = set() # final set of new heads |
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441 discarded = set() # new head of fully replaced branch |
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442 |
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443 localcandidate = set() # candidate heads known locally |
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444 unknownheads = set() # candidate heads unknown locally |
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445 for h in candidate_newhs: |
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446 if h in unfi: |
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447 localcandidate.add(h) |
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448 else: |
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449 if successorsmarkers.get(h) is not None: |
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450 msg = ('checkheads: remote head unknown locally has' |
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451 ' local marker: %s\n') |
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452 repo.ui.debug(msg % hex(h)) |
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453 unknownheads.add(h) |
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454 |
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455 # fast path the simple case |
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456 if len(localcandidate) == 1: |
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457 return unknownheads | set(candidate_newhs), set() |
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458 |
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459 # actually process branch replacement |
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460 while localcandidate: |
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461 nh = localcandidate.pop() |
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462 # run this check early to skip the evaluation of the whole branch |
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463 if (nh in futurecommon |
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464 or unfi[nh].phase() <= public): |
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465 newhs.add(nh) |
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466 continue |
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467 |
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468 # Get all revs/nodes on the branch exclusive to this head |
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469 # (already filtered heads are "ignored")) |
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470 branchrevs = unfi.revs('only(%n, (%ln+%ln))', |
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471 nh, localcandidate, newhs) |
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472 branchnodes = [tonode(r) for r in branchrevs] |
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473 |
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474 # The branch won't be hidden on the remote if |
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475 # * any part of it is public, |
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476 # * any part of it is considered part of the result by previous logic, |
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477 # * if we have no markers to push to obsolete it. |
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478 if (any(ispublic(r) for r in branchrevs) |
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479 or any(n in futurecommon for n in branchnodes) |
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480 or any(not hasoutmarker(n) for n in branchnodes)): |
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481 newhs.add(nh) |
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482 else: |
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483 # note: there is a corner case if there is a merge in the branch. |
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484 # we might end up with -more- heads. However, these heads are not |
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485 # "added" by the push, but more by the "removal" on the remote so I |
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486 # think is a okay to ignore them, |
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487 discarded.add(nh) |
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488 newhs |= unknownheads |
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489 return newhs, discarded |
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490 |
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491 def pushingmarkerfor(obsstore, pushset, node): |
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492 """true if some markers are to be pushed for node |
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493 |
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494 We cannot just look in to the pushed obsmarkers from the pushop because |
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495 discovery might have filtered relevant markers. In addition listing all |
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496 markers relevant to all changesets in the pushed set would be too expensive |
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497 (O(len(repo))) |
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498 |
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499 (note: There are cache opportunity in this function. but it would requires |
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500 a two dimensional stack.) |
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501 """ |
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502 successorsmarkers = obsstore.successors |
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503 stack = [node] |
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504 seen = set(stack) |
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505 while stack: |
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506 current = stack.pop() |
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507 if current in pushset: |
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508 return True |
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509 markers = successorsmarkers.get(current, ()) |
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510 # markers fields = ('prec', 'succs', 'flag', 'meta', 'date', 'parents') |
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511 for m in markers: |
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512 nexts = m[1] # successors |
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513 if not nexts: # this is a prune marker |
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514 nexts = m[5] or () # parents |
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515 for n in nexts: |
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516 if n not in seen: |
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517 seen.add(n) |
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518 stack.append(n) |
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519 return False |