Mercurial > hg
annotate mercurial/discovery.py @ 15711:c51c9dc13a58
cygwin: add cygwin specific normcase logic
in cygwin environment, mount point part of path is treated as case
sensitive, even though underlying NTFS is case insensitive.
this patch preserves mount point part of specified path, only if it is
absolute one.
there is no easy way to get list of current mount points from python
program, other than to execute "mount" external command, because
cygwin does not store current mount points into Unix/Linux like
/etc/XXXtab file.
so, this patch introduces cygwinmountpoints variable to list mount
points to be preserved case.
this allows some other extensions to customize mount point
configuration.
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
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date | Fri, 16 Dec 2011 21:21:08 +0900 |
parents | 646759147717 |
children | cff25e4b37d2 |
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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7 |
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8 from node import nullid, short |
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10 import util, setdiscovery, treediscovery |
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11 |
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12 def findcommonincoming(repo, remote, heads=None, force=False): |
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13 """Return a tuple (common, anyincoming, heads) used to identify the common |
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14 subset of nodes between repo and remote. |
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15 |
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16 "common" is a list of (at least) the heads of the common subset. |
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17 "anyincoming" is testable as a boolean indicating if any nodes are missing |
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18 locally. If remote does not support getbundle, this actually is a list of |
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19 roots of the nodes that would be incoming, to be supplied to |
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20 changegroupsubset. No code except for pull should be relying on this fact |
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21 any longer. |
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22 "heads" is either the supplied heads, or else the remote's heads. |
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23 |
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24 If you pass heads and they are all known locally, the reponse lists justs |
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25 these heads in "common" and in "heads". |
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26 |
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27 Please use findcommonoutgoing to compute the set of outgoing nodes to give |
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28 extensions a good hook into outgoing. |
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29 """ |
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30 |
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31 if not remote.capable('getbundle'): |
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32 return treediscovery.findcommonincoming(repo, remote, heads, force) |
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33 |
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34 if heads: |
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35 allknown = True |
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36 nm = repo.changelog.nodemap |
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37 for h in heads: |
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38 if nm.get(h) is None: |
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39 allknown = False |
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40 break |
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41 if allknown: |
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42 return (heads, False, heads) |
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43 |
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44 res = setdiscovery.findcommonheads(repo.ui, repo, remote, |
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45 abortwhenunrelated=not force) |
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46 common, anyinc, srvheads = res |
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47 return (list(common), anyinc, heads or list(srvheads)) |
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48 |
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49 def findcommonoutgoing(repo, other, onlyheads=None, force=False, commoninc=None): |
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50 '''Return a tuple (common, anyoutgoing, heads) used to identify the set |
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51 of nodes present in repo but not in other. |
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52 |
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53 If onlyheads is given, only nodes ancestral to nodes in onlyheads (inclusive) |
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54 are included. If you already know the local repo's heads, passing them in |
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55 onlyheads is faster than letting them be recomputed here. |
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56 |
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57 If commoninc is given, it must the the result of a prior call to |
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58 findcommonincoming(repo, other, force) to avoid recomputing it here. |
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59 |
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60 The returned tuple is meant to be passed to changelog.findmissing.''' |
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61 common, _any, _hds = commoninc or findcommonincoming(repo, other, force=force) |
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62 return (common, onlyheads or repo.heads()) |
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63 |
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64 def prepush(repo, remote, force, revs, newbranch): |
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65 '''Analyze the local and remote repositories and determine which |
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66 changesets need to be pushed to the remote. Return value depends |
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67 on circumstances: |
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68 |
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69 If we are not going to push anything, return a tuple (None, |
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70 outgoing, common) where outgoing is 0 if there are no outgoing |
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71 changesets and 1 if there are, but we refuse to push them |
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72 (e.g. would create new remote heads). The third element "common" |
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73 is the list of heads of the common set between local and remote. |
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74 |
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75 Otherwise, return a tuple (changegroup, remoteheads, futureheads), |
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76 where changegroup is a readable file-like object whose read() |
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77 returns successive changegroup chunks ready to be sent over the |
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78 wire, remoteheads is the list of remote heads and futureheads is |
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79 the list of heads of the common set between local and remote to |
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80 be after push completion. |
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81 ''' |
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82 commoninc = findcommonincoming(repo, remote, force=force) |
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83 common, revs = findcommonoutgoing(repo, remote, onlyheads=revs, |
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84 commoninc=commoninc, force=force) |
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85 _common, inc, remoteheads = commoninc |
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86 |
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87 cl = repo.changelog |
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88 outg = cl.findmissing(common, revs) |
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89 |
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90 if not outg: |
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91 repo.ui.status(_("no changes found\n")) |
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92 return None, 1, common |
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93 |
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94 if not force and remoteheads != [nullid]: |
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95 if remote.capable('branchmap'): |
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96 # Check for each named branch if we're creating new remote heads. |
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97 # To be a remote head after push, node must be either: |
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98 # - unknown locally |
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99 # - a local outgoing head descended from update |
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100 # - a remote head that's known locally and not |
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101 # ancestral to an outgoing head |
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102 |
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103 # 1. Create set of branches involved in the push. |
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104 branches = set(repo[n].branch() for n in outg) |
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105 |
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106 # 2. Check for new branches on the remote. |
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107 remotemap = remote.branchmap() |
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108 newbranches = branches - set(remotemap) |
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109 if newbranches and not newbranch: # new branch requires --new-branch |
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110 branchnames = ', '.join(sorted(newbranches)) |
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111 raise util.Abort(_("push creates new remote branches: %s!") |
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112 % branchnames, |
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113 hint=_("use 'hg push --new-branch' to create" |
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114 " new remote branches")) |
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115 branches.difference_update(newbranches) |
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116 |
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117 # 3. Construct the initial oldmap and newmap dicts. |
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118 # They contain information about the remote heads before and |
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119 # after the push, respectively. |
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120 # Heads not found locally are not included in either dict, |
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121 # since they won't be affected by the push. |
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122 # unsynced contains all branches with incoming changesets. |
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123 oldmap = {} |
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124 newmap = {} |
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125 unsynced = set() |
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126 for branch in branches: |
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127 remotebrheads = remotemap[branch] |
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128 prunedbrheads = [h for h in remotebrheads if h in cl.nodemap] |
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129 oldmap[branch] = prunedbrheads |
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130 newmap[branch] = list(prunedbrheads) |
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131 if len(remotebrheads) > len(prunedbrheads): |
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132 unsynced.add(branch) |
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133 |
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134 # 4. Update newmap with outgoing changes. |
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135 # This will possibly add new heads and remove existing ones. |
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136 ctxgen = (repo[n] for n in outg) |
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137 repo._updatebranchcache(newmap, ctxgen) |
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138 |
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139 else: |
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140 # 1-4b. old servers: Check for new topological heads. |
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141 # Construct {old,new}map with branch = None (topological branch). |
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142 # (code based on _updatebranchcache) |
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143 oldheads = set(h for h in remoteheads if h in cl.nodemap) |
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144 newheads = oldheads.union(outg) |
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145 if len(newheads) > 1: |
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146 for latest in reversed(outg): |
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147 if latest not in newheads: |
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148 continue |
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149 minhrev = min(cl.rev(h) for h in newheads) |
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150 reachable = cl.reachable(latest, cl.node(minhrev)) |
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151 reachable.remove(latest) |
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152 newheads.difference_update(reachable) |
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153 branches = set([None]) |
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154 newmap = {None: newheads} |
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155 oldmap = {None: oldheads} |
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156 unsynced = inc and branches or set() |
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157 |
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158 # 5. Check for new heads. |
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159 # If there are more heads after the push than before, a suitable |
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160 # error message, depending on unsynced status, is displayed. |
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161 error = None |
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162 for branch in branches: |
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163 newhs = set(newmap[branch]) |
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164 oldhs = set(oldmap[branch]) |
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165 if len(newhs) > len(oldhs): |
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166 dhs = list(newhs - oldhs) |
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167 if error is None: |
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168 if branch not in ('default', None): |
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169 error = _("push creates new remote head %s " |
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170 "on branch '%s'!") % (short(dhs[0]), branch) |
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171 else: |
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172 error = _("push creates new remote head %s!" |
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173 ) % short(dhs[0]) |
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174 if branch in unsynced: |
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175 hint = _("you should pull and merge or " |
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176 "use push -f to force") |
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177 else: |
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178 hint = _("did you forget to merge? " |
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179 "use push -f to force") |
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180 if branch is not None: |
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181 repo.ui.note(_("new remote heads on branch '%s'\n") % branch) |
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182 for h in dhs: |
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183 repo.ui.note(_("new remote head %s\n") % short(h)) |
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184 if error: |
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185 raise util.Abort(error, hint=hint) |
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186 |
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187 # 6. Check for unsynced changes on involved branches. |
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188 if unsynced: |
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189 repo.ui.warn(_("note: unsynced remote changes!\n")) |
515 | 190 |
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191 if revs is None: |
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192 # use the fast path, no race possible on push |
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193 cg = repo._changegroup(outg, 'push') |
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194 else: |
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195 cg = repo.getbundle('push', heads=revs, common=common) |
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196 # no need to compute outg ancestor. All node in outg have either: |
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197 # - parents in outg |
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198 # - parents in common |
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199 # - nullid parent |
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200 rset = repo.set('heads(%ln + %ln)', common, outg) |
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201 futureheads = [ctx.node() for ctx in rset] |
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202 return cg, remoteheads, futureheads |