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annotate mercurial/discovery.py @ 11635:4da35e02b67c

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log: do not redefine cachefunc in walkchangerevs The same variable is defined a few blocks earlier. The first phases in walkchangerevs should in fact fill that cache, and allow faster lookups in the last phase. Redefining and overriding this cached function, (knowing that it will be called with the same arguments) defeats the caching purpose.
author Nicolas Dumazet <nicdumz.commits@gmail.com>
date Tue, 20 Jul 2010 14:42:05 +0900
parents bb7af1de5e38
children 9c5794223340
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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
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6 # GNU General Public License version 2 or any later version.
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7
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8 from node import nullid, short
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9 from i18n import _
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10 import util, error
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11
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12 def findincoming(repo, remote, base=None, heads=None, force=False):
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13 """Return list of roots of the subsets of missing nodes from remote
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15 If base dict is specified, assume that these nodes and their parents
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16 exist on the remote side and that no child of a node of base exists
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17 in both remote and repo.
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18 Furthermore base will be updated to include the nodes that exists
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19 in repo and remote but no children exists in repo and remote.
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20 If a list of heads is specified, return only nodes which are heads
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21 or ancestors of these heads.
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22
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23 All the ancestors of base are in repo and in remote.
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24 All the descendants of the list returned are missing in repo.
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25 (and so we know that the rest of the nodes are missing in remote, see
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26 outgoing)
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27 """
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28 return findcommonincoming(repo, remote, base, heads, force)[1]
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29
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30 def findcommonincoming(repo, remote, base=None, heads=None, force=False):
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31 """Return a tuple (common, missing roots, heads) used to identify
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32 missing nodes from remote.
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33
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34 If base dict is specified, assume that these nodes and their parents
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35 exist on the remote side and that no child of a node of base exists
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36 in both remote and repo.
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37 Furthermore base will be updated to include the nodes that exists
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38 in repo and remote but no children exists in both repo and remote.
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39 In other words, base is the set of heads of the DAG resulting from
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40 the intersection of the nodes from repo and remote.
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41 If a list of heads is specified, return only nodes which are heads
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42 or ancestors of these heads.
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44 All the ancestors of base are in repo and in remote.
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45 """
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46 m = repo.changelog.nodemap
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47 search = []
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48 fetch = set()
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49 seen = set()
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50 seenbranch = set()
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51 if base is None:
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52 base = {}
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53
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54 if not heads:
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55 heads = remote.heads()
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56
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57 if repo.changelog.tip() == nullid:
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58 base[nullid] = 1
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59 if heads != [nullid]:
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60 return [nullid], [nullid], list(heads)
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61 return [nullid], [], []
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62
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63 # assume we're closer to the tip than the root
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64 # and start by examining the heads
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65 repo.ui.status(_("searching for changes\n"))
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66
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67 unknown = []
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68 for h in heads:
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69 if h not in m:
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70 unknown.append(h)
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71 else:
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72 base[h] = 1
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74 heads = unknown
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75 if not unknown:
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76 return base.keys(), [], []
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78 req = set(unknown)
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79 reqcnt = 0
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80
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81 # search through remote branches
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82 # a 'branch' here is a linear segment of history, with four parts:
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83 # head, root, first parent, second parent
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84 # (a branch always has two parents (or none) by definition)
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85 unknown = remote.branches(unknown)
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86 while unknown:
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87 r = []
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88 while unknown:
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89 n = unknown.pop(0)
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90 if n[0] in seen:
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91 continue
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92
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93 repo.ui.debug("examining %s:%s\n"
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94 % (short(n[0]), short(n[1])))
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95 if n[0] == nullid: # found the end of the branch
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96 pass
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97 elif n in seenbranch:
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98 repo.ui.debug("branch already found\n")
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99 continue
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100 elif n[1] and n[1] in m: # do we know the base?
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101 repo.ui.debug("found incomplete branch %s:%s\n"
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102 % (short(n[0]), short(n[1])))
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103 search.append(n[0:2]) # schedule branch range for scanning
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104 seenbranch.add(n)
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105 else:
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106 if n[1] not in seen and n[1] not in fetch:
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107 if n[2] in m and n[3] in m:
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108 repo.ui.debug("found new changeset %s\n" %
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109 short(n[1]))
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110 fetch.add(n[1]) # earliest unknown
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111 for p in n[2:4]:
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112 if p in m:
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113 base[p] = 1 # latest known
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114
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115 for p in n[2:4]:
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116 if p not in req and p not in m:
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117 r.append(p)
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118 req.add(p)
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119 seen.add(n[0])
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120
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121 if r:
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122 reqcnt += 1
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123 repo.ui.progress(_('searching'), reqcnt, unit=_('queries'))
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124 repo.ui.debug("request %d: %s\n" %
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125 (reqcnt, " ".join(map(short, r))))
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126 for p in xrange(0, len(r), 10):
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127 for b in remote.branches(r[p:p + 10]):
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128 repo.ui.debug("received %s:%s\n" %
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129 (short(b[0]), short(b[1])))
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130 unknown.append(b)
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131
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132 # do binary search on the branches we found
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133 while search:
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134 newsearch = []
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135 reqcnt += 1
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136 repo.ui.progress(_('searching'), reqcnt, unit=_('queries'))
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137 for n, l in zip(search, remote.between(search)):
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138 l.append(n[1])
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139 p = n[0]
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140 f = 1
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141 for i in l:
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142 repo.ui.debug("narrowing %d:%d %s\n" % (f, len(l), short(i)))
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143 if i in m:
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144 if f <= 2:
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145 repo.ui.debug("found new branch changeset %s\n" %
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146 short(p))
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147 fetch.add(p)
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148 base[i] = 1
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149 else:
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150 repo.ui.debug("narrowed branch search to %s:%s\n"
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151 % (short(p), short(i)))
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152 newsearch.append((p, i))
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153 break
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154 p, f = i, f * 2
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155 search = newsearch
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09a1ee498756 localrepo: add destroyed() method for strip/rollback to use (issue548).
Greg Ward <greg-hg@gerg.ca>
parents: 9149
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156
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157 # sanity check our fetch list
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158 for f in fetch:
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159 if f in m:
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160 raise error.RepoError(_("already have changeset ")
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161 + short(f[:4]))
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312c845edef5 simplify dirstate fixups in repo.status()
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162
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163 if base.keys() == [nullid]:
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164 if force:
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165 repo.ui.warn(_("warning: repository is unrelated\n"))
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166 else:
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167 raise util.Abort(_("repository is unrelated"))
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Bryan O'Sullivan <bos@serpentine.com>
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168
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169 repo.ui.debug("found new changesets starting at " +
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170 " ".join([short(f) for f in fetch]) + "\n")
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171
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172 repo.ui.progress(_('searching'), None)
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173 repo.ui.debug("%d total queries\n" % reqcnt)
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174
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175 return base.keys(), list(fetch), heads
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176
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177 def findoutgoing(repo, remote, base=None, remoteheads=None, force=False):
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178 """Return list of nodes that are roots of subsets not in remote
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179
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180 If base dict is specified, assume that these nodes and their parents
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181 exist on the remote side.
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182 If remotehead is specified, assume it is the list of the heads from
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183 the remote repository.
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184 """
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185 if base is None:
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186 base = {}
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187 findincoming(repo, remote, base, remoteheads, force=force)
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188
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189 repo.ui.debug("common changesets up to "
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190 + " ".join(map(short, base.keys())) + "\n")
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191
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192 remain = set(repo.changelog.nodemap)
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193
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194 # prune everything remote has from the tree
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195 remain.remove(nullid)
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196 remove = base.keys()
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197 while remove:
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198 n = remove.pop(0)
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199 if n in remain:
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200 remain.remove(n)
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201 for p in repo.changelog.parents(n):
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202 remove.append(p)
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d40cc5aacc31 Fix up a bunch of bugs in the new merge code
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203
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204 # find every node whose parents have been pruned
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205 subset = []
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206 # find every remote head that will get new children
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207 for n in remain:
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208 p1, p2 = repo.changelog.parents(n)
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209 if p1 not in remain and p2 not in remain:
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210 subset.append(n)
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211
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212 return subset
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parents: 3682
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213
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214 def prepush(repo, remote, force, revs, newbranch):
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215 '''Analyze the local and remote repositories and determine which
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216 changesets need to be pushed to the remote. Return value depends
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217 on circumstances:
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36b6b5ef7820 prepush: rename variables, refactor
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218
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219 If we are not going to push anything, return a tuple (None,
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220 outgoing) where outgoing is 0 if there are no outgoing
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221 changesets and 1 if there are, but we refuse to push them
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222 (e.g. would create new remote heads).
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223
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224 Otherwise, return a tuple (changegroup, remoteheads), where
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225 changegroup is a readable file-like object whose read() returns
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226 successive changegroup chunks ready to be sent over the wire and
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227 remoteheads is the list of remote heads.'''
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228 common = {}
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229 remoteheads = remote.heads()
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230 inc = findincoming(repo, remote, common, remoteheads, force=force)
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parents: 2424
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231
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232 cl = repo.changelog
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233 update = findoutgoing(repo, remote, common, remoteheads)
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234 outg, bases, heads = cl.nodesbetween(update, revs)
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235
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236 if not bases:
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237 repo.ui.status(_("no changes found\n"))
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238 return None, 1
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e9fe5d5e67f7 Add generic repo commands for pull and push
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239
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240 if not force and remoteheads != [nullid]:
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241 if remote.capable('branchmap'):
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242 # Check for each named branch if we're creating new remote heads.
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243 # To be a remote head after push, node must be either:
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244 # - unknown locally
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245 # - a local outgoing head descended from update
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246 # - a remote head that's known locally and not
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247 # ancestral to an outgoing head
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248 #
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249 # New named branches cannot be created without --force.
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2d30d66a89ad whitespace cleanup
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parents: 10396
diff changeset
250
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251 # 1. Create set of branches involved in the push.
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252 branches = set(repo[n].branch() for n in outg)
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b6d9ea0bc107 Added a lot of comments to changegroupsubset.
Eric Hopper <hopper@omnifarious.org>
parents: 1464
diff changeset
253
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254 # 2. Check for new branches on the remote.
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255 remotemap = remote.branchmap()
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256 newbranches = branches - set(remotemap)
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257 if newbranches and not newbranch: # new branch requires --new-branch
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Martin Geisler <mg@aragost.com>
parents: 11313
diff changeset
258 branchnames = ', '.join(sorted(newbranches))
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259 raise util.Abort(_("push creates new remote branches: %s!")
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diff changeset
260 % branchnames,
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diff changeset
261 hint=_("use 'hg push --new-branch' to create"
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262 " new remote branches"))
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263 branches.difference_update(newbranches)
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1033892bbb87 This changes the revlog.group and re-implements the localrepo.changeroup
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264
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265 # 3. Construct the initial oldmap and newmap dicts.
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266 # They contain information about the remote heads before and
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267 # after the push, respectively.
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268 # Heads not found locally are not included in either dict,
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269 # since they won't be affected by the push.
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270 # unsynced contains all branches with incoming changesets.
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271 oldmap = {}
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272 newmap = {}
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273 unsynced = set()
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274 for branch in branches:
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275 remotebrheads = remotemap[branch]
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276 prunedbrheads = [h for h in remotebrheads if h in cl.nodemap]
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277 oldmap[branch] = prunedbrheads
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278 newmap[branch] = list(prunedbrheads)
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279 if len(remotebrheads) > len(prunedbrheads):
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280 unsynced.add(branch)
635
85e2209d401c Protocol switch from using generators to stream-like objects.
Matt Mackall <mpm@selenic.com>
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281
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282 # 4. Update newmap with outgoing changes.
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283 # This will possibly add new heads and remove existing ones.
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284 ctxgen = (repo[n] for n in outg)
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285 repo._updatebranchcache(newmap, ctxgen)
1998
65cc17ae9649 fix race in localrepo.addchangegroup.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 1995
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286
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287 else:
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288 # 1-4b. old servers: Check for new topological heads.
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289 # Construct {old,new}map with branch = None (topological branch).
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290 # (code based on _updatebranchcache)
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291 oldheads = set(h for h in remoteheads if h in cl.nodemap)
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292 newheads = oldheads.union(outg)
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293 if len(newheads) > 1:
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294 for latest in reversed(outg):
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295 if latest not in newheads:
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296 continue
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297 minhrev = min(cl.rev(h) for h in newheads)
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298 reachable = cl.reachable(latest, cl.node(minhrev))
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299 reachable.remove(latest)
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300 newheads.difference_update(reachable)
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301 branches = set([None])
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302 newmap = {None: newheads}
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303 oldmap = {None: oldheads}
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304 unsynced = inc and branches or set()
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305
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306 # 5. Check for new heads.
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307 # If there are more heads after the push than before, a suitable
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308 # warning, depending on unsynced status, is displayed.
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309 for branch in branches:
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310 if len(newmap[branch]) > len(oldmap[branch]):
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311 if branch:
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312 msg = _("push creates new remote heads "
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313 "on branch '%s'!") % branch
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314 else:
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315 msg = _("push creates new remote heads!")
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316
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317 if branch in unsynced:
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318 hint = _("you should pull and merge or use push -f to force")
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319 else:
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320 hint = _("did you forget to merge? use push -f to force")
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321 raise util.Abort(msg, hint=hint)
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322
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323 # 6. Check for unsynced changes on involved branches.
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324 if unsynced:
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325 repo.ui.warn(_("note: unsynced remote changes!\n"))
515
03f27b1381f9 Whitespace cleanups
mpm@selenic.com
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326
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327 if revs is None:
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328 # use the fast path, no race possible on push
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329 nodes = repo.changelog.findmissing(common.keys())
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330 cg = repo._changegroup(nodes, 'push')
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331 else:
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332 cg = repo.changegroupsubset(update, revs, 'push')
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333 return cg, remoteheads