annotate hgext/fetch.py @ 8202:4746113269c7

ui: buffers -> _buffers
author Matt Mackall <mpm@selenic.com>
date Sun, 26 Apr 2009 16:50:44 -0500
parents f3abe032fc89
children 46293a0c7e9f
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1 # fetch.py - pull and merge remote changes
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2 #
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3 # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
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4 #
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5 # This software may be used and distributed according to the terms
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6 # of the GNU General Public License, incorporated herein by reference.
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7 '''pulling, updating and merging in one command'''
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8
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9 from mercurial.i18n import _
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10 from mercurial.node import nullid, short
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11 from mercurial import commands, cmdutil, hg, util, url
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12 from mercurial.lock import release
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13
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14 def fetch(ui, repo, source='default', **opts):
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15 '''pull changes from a remote repository, merge new changes if needed.
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16
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17 This finds all changes from the repository at the specified path
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18 or URL and adds them to the local repository.
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19
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20 If the pulled changes add a new branch head, the head is
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21 automatically merged, and the result of the merge is committed.
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22 Otherwise, the working directory is updated to include the new
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23 changes.
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24
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25 When a merge occurs, the newly pulled changes are assumed to be
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26 "authoritative". The head of the new changes is used as the first
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27 parent, with local changes as the second. To switch the merge
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28 order, use --switch-parent.
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29
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30 See 'hg help dates' for a list of formats valid for -d/--date.
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31 '''
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32
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33 date = opts.get('date')
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34 if date:
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35 opts['date'] = util.parsedate(date)
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36
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37 parent, p2 = repo.dirstate.parents()
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38 branch = repo.dirstate.branch()
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39 branchnode = repo.branchtags().get(branch)
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40 if parent != branchnode:
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41 raise util.Abort(_('working dir not at branch tip '
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42 '(use "hg update" to check out branch tip)'))
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43
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44 if p2 != nullid:
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45 raise util.Abort(_('outstanding uncommitted merge'))
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46
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47 wlock = lock = None
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48 try:
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49 wlock = repo.wlock()
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50 lock = repo.lock()
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51 mod, add, rem, del_ = repo.status()[:4]
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52
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53 if mod or add or rem:
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54 raise util.Abort(_('outstanding uncommitted changes'))
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55 if del_:
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56 raise util.Abort(_('working directory is missing some files'))
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57 bheads = repo.branchheads(branch)
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58 bheads = [head for head in bheads if len(repo[head].children()) == 0]
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59 if len(bheads) > 1:
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60 raise util.Abort(_('multiple heads in this branch '
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61 '(use "hg heads ." and "hg merge" to merge)'))
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62
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63 other = hg.repository(cmdutil.remoteui(repo, opts),
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64 ui.expandpath(source))
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65 ui.status(_('pulling from %s\n') %
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66 url.hidepassword(ui.expandpath(source)))
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67 revs = None
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68 if opts['rev']:
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69 if not other.local():
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70 raise util.Abort(_("fetch -r doesn't work for remote "
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71 "repositories yet"))
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72 else:
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73 revs = [other.lookup(rev) for rev in opts['rev']]
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74
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75 # Are there any changes at all?
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76 modheads = repo.pull(other, heads=revs)
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77 if modheads == 0:
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78 return 0
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79
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80 # Is this a simple fast-forward along the current branch?
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81 newheads = repo.branchheads(branch)
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82 newheads = [head for head in newheads if len(repo[head].children()) == 0]
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83 newchildren = repo.changelog.nodesbetween([parent], newheads)[2]
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84 if len(newheads) == 1:
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85 if newchildren[0] != parent:
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86 return hg.clean(repo, newchildren[0])
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87 else:
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88 return
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89
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90 # Are there more than one additional branch heads?
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91 newchildren = [n for n in newchildren if n != parent]
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92 newparent = parent
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93 if newchildren:
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94 newparent = newchildren[0]
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95 hg.clean(repo, newparent)
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96 newheads = [n for n in newheads if n != newparent]
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97 if len(newheads) > 1:
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98 ui.status(_('not merging with %d other new branch heads '
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99 '(use "hg heads ." and "hg merge" to merge them)\n') %
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100 (len(newheads) - 1))
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101 return
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102
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103 # Otherwise, let's merge.
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104 err = False
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105 if newheads:
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106 # By default, we consider the repository we're pulling
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107 # *from* as authoritative, so we merge our changes into
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108 # theirs.
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109 if opts['switch_parent']:
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110 firstparent, secondparent = newparent, newheads[0]
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111 else:
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112 firstparent, secondparent = newheads[0], newparent
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113 ui.status(_('updating to %d:%s\n') %
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114 (repo.changelog.rev(firstparent),
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115 short(firstparent)))
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116 hg.clean(repo, firstparent)
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117 ui.status(_('merging with %d:%s\n') %
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118 (repo.changelog.rev(secondparent), short(secondparent)))
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119 err = hg.merge(repo, secondparent, remind=False)
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120
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121 if not err:
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122 mod, add, rem = repo.status()[:3]
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123 message = (cmdutil.logmessage(opts) or
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124 (_('Automated merge with %s') %
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125 url.removeauth(other.url())))
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126 force_editor = opts.get('force_editor') or opts.get('edit')
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127 n = repo.commit(mod + add + rem, message,
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128 opts['user'], opts['date'], force=True,
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129 force_editor=force_editor)
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130 ui.status(_('new changeset %d:%s merges remote changes '
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131 'with local\n') % (repo.changelog.rev(n),
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132 short(n)))
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133
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134 finally:
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135 release(lock, wlock)
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136
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137 cmdtable = {
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138 'fetch':
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139 (fetch,
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140 [('r', 'rev', [], _('a specific revision you would like to pull')),
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141 ('e', 'edit', None, _('edit commit message')),
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142 ('', 'force-editor', None, _('edit commit message (DEPRECATED)')),
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143 ('', 'switch-parent', None, _('switch parents when merging')),
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144 ] + commands.commitopts + commands.commitopts2 + commands.remoteopts,
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145 _('hg fetch [SOURCE]')),
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146 }