Mercurial > hg
annotate mercurial/discovery.py @ 14077:c285bdb0572a
util.url: copy urllib.unquote() into util to improve startup times
The ui class uses util.hasscheme() in a couple of places, causing hg
to import urllib even when it doesn't need to. This copies
urllib.unquote() to avoid that import.
perfstartup time before the URL refactoring (8796fb6af67e):
! wall 0.050692 comb 0.000000 user 0.000000 sys 0.000000 (best of 100)
before this change:
! wall 0.064742 comb 0.000000 user 0.000000 sys 0.000000 (best of 100)
after this change:
! wall 0.052126 comb 0.000000 user 0.000000 sys 0.000000 (best of 100
author | Brodie Rao <brodie@bitheap.org> |
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date | Sat, 30 Apr 2011 09:43:23 -0700 |
parents | 72c84f24b420 |
children | cb98fed52495 |
rev | line source |
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1 # discovery.py - protocol changeset discovery functions |
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2 # |
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3 # Copyright 2010 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from node import nullid, short |
3891 | 9 from i18n import _ |
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10 import util, error |
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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 |
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25 m = repo.changelog.nodemap |
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26 search = [] |
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27 fetch = set() |
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28 seen = set() |
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29 seenbranch = set() |
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30 base = set() |
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31 |
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32 if not heads: |
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33 heads = remote.heads() |
343 | 34 |
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35 if repo.changelog.tip() == nullid: |
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36 base.add(nullid) |
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37 if heads != [nullid]: |
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38 return [nullid], [nullid], list(heads) |
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39 return [nullid], [], [] |
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40 |
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41 # assume we're closer to the tip than the root |
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42 # and start by examining the heads |
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43 repo.ui.status(_("searching for changes\n")) |
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44 |
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45 if remote.capable('getbundle'): |
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46 myheads = repo.heads() |
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47 known = remote.known(myheads) |
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48 if util.all(known): |
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49 hasincoming = set(heads).difference(set(myheads)) and True |
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50 return myheads, hasincoming, heads |
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51 |
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52 unknown = [] |
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53 for h in heads: |
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54 if h not in m: |
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55 unknown.append(h) |
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56 else: |
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57 base.add(h) |
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58 |
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59 heads = unknown |
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60 if not unknown: |
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61 return list(base), [], [] |
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62 |
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63 req = set(unknown) |
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64 reqcnt = 0 |
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65 |
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66 # search through remote branches |
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67 # a 'branch' here is a linear segment of history, with four parts: |
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68 # head, root, first parent, second parent |
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69 # (a branch always has two parents (or none) by definition) |
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70 unknown = remote.branches(unknown) |
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71 while unknown: |
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72 r = [] |
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73 while unknown: |
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74 n = unknown.pop(0) |
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75 if n[0] in seen: |
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76 continue |
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77 |
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78 repo.ui.debug("examining %s:%s\n" |
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79 % (short(n[0]), short(n[1]))) |
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80 if n[0] == nullid: # found the end of the branch |
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81 pass |
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82 elif n in seenbranch: |
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83 repo.ui.debug("branch already found\n") |
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84 continue |
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85 elif n[1] and n[1] in m: # do we know the base? |
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86 repo.ui.debug("found incomplete branch %s:%s\n" |
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87 % (short(n[0]), short(n[1]))) |
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88 search.append(n[0:2]) # schedule branch range for scanning |
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89 seenbranch.add(n) |
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90 else: |
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91 if n[1] not in seen and n[1] not in fetch: |
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92 if n[2] in m and n[3] in m: |
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93 repo.ui.debug("found new changeset %s\n" % |
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94 short(n[1])) |
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95 fetch.add(n[1]) # earliest unknown |
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96 for p in n[2:4]: |
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97 if p in m: |
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98 base.add(p) # latest known |
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99 |
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100 for p in n[2:4]: |
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101 if p not in req and p not in m: |
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102 r.append(p) |
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103 req.add(p) |
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104 seen.add(n[0]) |
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105 |
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106 if r: |
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107 reqcnt += 1 |
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108 repo.ui.progress(_('searching'), reqcnt, unit=_('queries')) |
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109 repo.ui.debug("request %d: %s\n" % |
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110 (reqcnt, " ".join(map(short, r)))) |
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111 for p in xrange(0, len(r), 10): |
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112 for b in remote.branches(r[p:p + 10]): |
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113 repo.ui.debug("received %s:%s\n" % |
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114 (short(b[0]), short(b[1]))) |
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115 unknown.append(b) |
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116 |
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117 # do binary search on the branches we found |
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118 while search: |
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119 newsearch = [] |
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120 reqcnt += 1 |
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121 repo.ui.progress(_('searching'), reqcnt, unit=_('queries')) |
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122 for n, l in zip(search, remote.between(search)): |
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123 l.append(n[1]) |
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124 p = n[0] |
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125 f = 1 |
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126 for i in l: |
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127 repo.ui.debug("narrowing %d:%d %s\n" % (f, len(l), short(i))) |
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128 if i in m: |
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129 if f <= 2: |
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130 repo.ui.debug("found new branch changeset %s\n" % |
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131 short(p)) |
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132 fetch.add(p) |
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133 base.add(i) |
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134 else: |
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135 repo.ui.debug("narrowed branch search to %s:%s\n" |
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136 % (short(p), short(i))) |
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137 newsearch.append((p, i)) |
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138 break |
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139 p, f = i, f * 2 |
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140 search = newsearch |
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141 |
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142 # sanity check our fetch list |
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143 for f in fetch: |
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144 if f in m: |
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145 raise error.RepoError(_("already have changeset ") |
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146 + short(f[:4])) |
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147 |
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148 base = list(base) |
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149 if base == [nullid]: |
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150 if force: |
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151 repo.ui.warn(_("warning: repository is unrelated\n")) |
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152 else: |
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153 raise util.Abort(_("repository is unrelated")) |
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154 |
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155 repo.ui.debug("found new changesets starting at " + |
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156 " ".join([short(f) for f in fetch]) + "\n") |
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157 |
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158 repo.ui.progress(_('searching'), None) |
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159 repo.ui.debug("%d total queries\n" % reqcnt) |
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160 |
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161 return base, list(fetch), heads |
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162 |
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163 def prepush(repo, remote, force, revs, newbranch): |
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164 '''Analyze the local and remote repositories and determine which |
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165 changesets need to be pushed to the remote. Return value depends |
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166 on circumstances: |
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167 |
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168 If we are not going to push anything, return a tuple (None, |
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169 outgoing) where outgoing is 0 if there are no outgoing |
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170 changesets and 1 if there are, but we refuse to push them |
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171 (e.g. would create new remote heads). |
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172 |
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173 Otherwise, return a tuple (changegroup, remoteheads), where |
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174 changegroup is a readable file-like object whose read() returns |
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175 successive changegroup chunks ready to be sent over the wire and |
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176 remoteheads is the list of remote heads.''' |
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177 remoteheads = remote.heads() |
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178 common, inc, _rheads = findcommonincoming(repo, remote, heads=remoteheads, |
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179 force=force) |
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180 |
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181 cl = repo.changelog |
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182 outg = cl.findmissing(common, revs) |
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183 |
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184 if not outg: |
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185 repo.ui.status(_("no changes found\n")) |
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186 return None, 1 |
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187 |
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188 if not force and remoteheads != [nullid]: |
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189 if remote.capable('branchmap'): |
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190 # Check for each named branch if we're creating new remote heads. |
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191 # To be a remote head after push, node must be either: |
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192 # - unknown locally |
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193 # - a local outgoing head descended from update |
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194 # - a remote head that's known locally and not |
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195 # ancestral to an outgoing head |
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196 |
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197 # 1. Create set of branches involved in the push. |
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198 branches = set(repo[n].branch() for n in outg) |
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199 |
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200 # 2. Check for new branches on the remote. |
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201 remotemap = remote.branchmap() |
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202 newbranches = branches - set(remotemap) |
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203 if newbranches and not newbranch: # new branch requires --new-branch |
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204 branchnames = ', '.join(sorted(newbranches)) |
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205 raise util.Abort(_("push creates new remote branches: %s!") |
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206 % branchnames, |
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207 hint=_("use 'hg push --new-branch' to create" |
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208 " new remote branches")) |
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209 branches.difference_update(newbranches) |
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210 |
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211 # 3. Construct the initial oldmap and newmap dicts. |
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212 # They contain information about the remote heads before and |
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213 # after the push, respectively. |
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214 # Heads not found locally are not included in either dict, |
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215 # since they won't be affected by the push. |
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216 # unsynced contains all branches with incoming changesets. |
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217 oldmap = {} |
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218 newmap = {} |
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219 unsynced = set() |
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220 for branch in branches: |
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221 remotebrheads = remotemap[branch] |
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222 prunedbrheads = [h for h in remotebrheads if h in cl.nodemap] |
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223 oldmap[branch] = prunedbrheads |
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224 newmap[branch] = list(prunedbrheads) |
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225 if len(remotebrheads) > len(prunedbrheads): |
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226 unsynced.add(branch) |
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227 |
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228 # 4. Update newmap with outgoing changes. |
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229 # This will possibly add new heads and remove existing ones. |
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230 ctxgen = (repo[n] for n in outg) |
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231 repo._updatebranchcache(newmap, ctxgen) |
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232 |
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233 else: |
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234 # 1-4b. old servers: Check for new topological heads. |
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235 # Construct {old,new}map with branch = None (topological branch). |
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236 # (code based on _updatebranchcache) |
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237 oldheads = set(h for h in remoteheads if h in cl.nodemap) |
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238 newheads = oldheads.union(outg) |
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239 if len(newheads) > 1: |
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240 for latest in reversed(outg): |
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241 if latest not in newheads: |
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242 continue |
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243 minhrev = min(cl.rev(h) for h in newheads) |
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244 reachable = cl.reachable(latest, cl.node(minhrev)) |
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245 reachable.remove(latest) |
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246 newheads.difference_update(reachable) |
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247 branches = set([None]) |
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248 newmap = {None: newheads} |
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249 oldmap = {None: oldheads} |
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250 unsynced = inc and branches or set() |
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251 |
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252 # 5. Check for new heads. |
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253 # If there are more heads after the push than before, a suitable |
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254 # error message, depending on unsynced status, is displayed. |
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255 error = None |
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256 for branch in branches: |
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257 newhs = set(newmap[branch]) |
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258 oldhs = set(oldmap[branch]) |
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259 if len(newhs) > len(oldhs): |
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260 if error is None: |
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261 if branch: |
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262 error = _("push creates new remote heads " |
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263 "on branch '%s'!") % branch |
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264 else: |
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265 error = _("push creates new remote heads!") |
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266 if branch in unsynced: |
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267 hint = _("you should pull and merge or " |
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268 "use push -f to force") |
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269 else: |
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270 hint = _("did you forget to merge? " |
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271 "use push -f to force") |
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272 if branch: |
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273 repo.ui.debug("new remote heads on branch '%s'\n" % branch) |
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274 for h in (newhs - oldhs): |
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275 repo.ui.debug("new remote head %s\n" % short(h)) |
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276 if error: |
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277 raise util.Abort(error, hint=hint) |
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278 |
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279 # 6. Check for unsynced changes on involved branches. |
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280 if unsynced: |
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281 repo.ui.warn(_("note: unsynced remote changes!\n")) |
515 | 282 |
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283 if revs is None: |
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284 # use the fast path, no race possible on push |
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285 cg = repo._changegroup(outg, 'push') |
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286 else: |
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287 cg = repo.getbundle('push', heads=revs, common=common) |
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288 return cg, remoteheads |