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  • Committer: Canonical.com Patch Queue Manager
  • Date: 2008-03-16 14:01:20 UTC
  • mfrom: (3280.2.5 integration)
  • Revision ID: pqm@pqm.ubuntu.com-20080316140120-i3yq8yr1l66m11h7
Start 1.4 development

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bzrlib/directory_service.py
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to true URLs.  Examples include lp:urls and per-user location aliases.
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"""
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from bzrlib import errors, registry
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from bzrlib.branch import Branch
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from bzrlib import urlutils
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""")
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from bzrlib import registry
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class DirectoryServiceRegistry(registry.Registry):
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    """This object maintains and uses a list of directory services.
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        return service().look_up(name, url)
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directories = DirectoryServiceRegistry()
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class AliasDirectory(object):
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    """Directory lookup for locations associated with a branch.
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    :parent, :submit, :public, :push, :this, and :bound are currently
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    supported.  On error, a subclass of DirectoryLookupFailure will be raised.
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    """
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    def look_up(self, name, url):
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        branch = Branch.open_containing('.')[0]
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        lookups = {
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            'parent': branch.get_parent,
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            'submit': branch.get_submit_branch,
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            'public': branch.get_public_branch,
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            'bound': branch.get_bound_location,
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            'push': branch.get_push_location,
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            'this': lambda: branch.base
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        }
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        parts = url.split('/', 1)
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        if len(parts) == 2:
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            name, extra = parts
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        else:
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            (name,) = parts
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            extra = None
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        try:
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            method = lookups[name[1:]]
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        except KeyError:
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            raise errors.InvalidLocationAlias(url)
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        else:
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            result = method()
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        if result is None:
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            raise errors.UnsetLocationAlias(url)
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        if extra is not None:
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            result = urlutils.join(result, extra)
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        return result
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directories.register(':', AliasDirectory,
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                     'Easy access to remembered branch locations')