Mercurial > hgsubversion

annotate svnrepo.py @ 332:56d877e6ccbb

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__init__: rewrite extension docstring to be slightly less hostile.
author Dan Villiom Podlaski Christiansen <danchr@gmail.com>
date Tue, 19 May 2009 11:05:45 +0200
parents 75f082b5897e
children
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1 """
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2 repository class-based interface for hgsubversion
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3
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4 Copyright (C) 2009, Dan Villiom Podlaski Christiansen <danchr@gmail.com>
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5 See parent package for licensing.
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6
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7 Internally, Mercurial assumes that every single repository is a localrepository
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8 subclass: pull() is called on the instance pull *to*, but not the one pulled
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9 *from*. To work around this, we create two classes:
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10
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11 - svnremoterepo for Subversion repositories, but it doesn't really do anything.
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12 - svnlocalrepo for local repositories which handles both operations on itself --
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13 the local, hgsubversion-enabled clone -- and the remote repository. Decorators
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14 are used to distinguish and filter these operations from others.
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15 """
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16
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17 from mercurial import node
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18 from mercurial import util as hgutil
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19 import mercurial.repo
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21 import hg_delta_editor
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22 import util
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23 import wrappers
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24
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25 def generate_repo_class(ui, repo):
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26 """ This function generates the local repository wrapper. """
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27
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28 def localsvn(fn):
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29 """
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30 Filter for instance methods which only apply to local Subversion
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31 repositories.
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32 """
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33 if util.is_svn_repo(repo):
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34 return fn
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35 else:
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36 return getattr(repo, fn.__name__)
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37
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38 def remotesvn(fn):
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39 """
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40 Filter for instance methods which require the first argument
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41 to be a remote Subversion repository instance.
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42 """
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43 original = getattr(repo.__class__, fn.__name__)
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44 def wrapper(self, *args, **opts):
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45 if 'subversion' in getattr(args[0], 'capabilities', []):
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46 return fn(self, *args, **opts)
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47 else:
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48 return original(self, *args, **opts)
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49 wrapper.__name__ = fn.__name__ + '_wrapper'
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50 wrapper.__doc__ = fn.__doc__
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51 return wrapper
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52
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53 class svnlocalrepo(repo.__class__):
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54 @remotesvn
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55 def push(self, remote, force=False, revs=None):
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56 # TODO: pass on revs
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57 wrappers.push(self, dest=remote.svnurl, force=force, revs=None)
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58
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59 @remotesvn
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60 def pull(self, remote, heads=None, force=False):
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61 try:
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62 lock = self.wlock()
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63 wrappers.pull(self, source=remote.svnurl, rev=heads, force=force)
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64 except KeyboardInterrupt:
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65 pass
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66 finally:
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67 lock.release()
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69 @localsvn
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70 def tags(self):
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71 tags = super(svnlocalrepo, self).tags()
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72 hg_editor = hg_delta_editor.HgChangeReceiver(repo=self)
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73 for tag, source in hg_editor.tags.iteritems():
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74 target = hg_editor.get_parent_revision(source[1]+1, source[0])
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75 tags['tag/%s' % tag] = target
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76 return tags
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77
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78 repo.__class__ = svnlocalrepo
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79
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80 class svnremoterepo(mercurial.repo.repository):
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81 """ the dumb wrapper for actual Subversion repositories """
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82
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83 def __init__(self, ui, path):
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84 self.ui = ui
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85 self.path = path
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86 self.capabilities = set(['lookup', 'subversion'])
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87
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88 @property
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89 def svnurl(self):
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90 return util.normalize_url(self.path)
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91
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92 def url(self):
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93 return self.path
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94
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95 def lookup(self, key):
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96 return key
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97
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98 def cancopy(self):
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99 return False
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100
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101 def heads(self, *args, **opts):
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102 """
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103 Whenever this function is hit, we abort. The traceback is useful for
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104 figuring out where to intercept the functionality.
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105 """
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106 raise hgutil.Abort('command unavailable for Subversion repositories')
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107
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108 def instance(ui, url, create):
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109 if create:
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110 raise hgutil.Abort('cannot create new remote Subversion repository')
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111
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112 return svnremoterepo(ui, url)