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from i18n import _
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from mercurial import util
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import templatekw
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def tolist(val):
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"""
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a convenience method to return an empty list instead of None
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"""
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if val is None:
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return []
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else:
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return [val]
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class namespaces(object):
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"""provides an interface to register and operate on multiple namespaces. See
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the namespace class below for details on the namespace object.
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"""
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_names_version = 0
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def __init__(self):
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self._names = util.sortdict()
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# we need current mercurial named objects (bookmarks, tags, and
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# branches) to be initialized somewhere, so that place is here
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bmknames = lambda repo: repo._bookmarks.keys()
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bmknamemap = lambda repo, name: tolist(repo._bookmarks.get(name))
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bmknodemap = lambda repo, name: repo.nodebookmarks(name)
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n = namespace("bookmarks", templatename="bookmark", listnames=bmknames,
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namemap=bmknamemap, nodemap=bmknodemap)
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self.addnamespace(n)
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tagnames = lambda repo: [t for t, n in repo.tagslist()]
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tagnamemap = lambda repo, name: tolist(repo._tagscache.tags.get(name))
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tagnodemap = lambda repo, name: repo.nodetags(name)
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n = namespace("tags", templatename="tag", listnames=tagnames,
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namemap=tagnamemap, nodemap=tagnodemap)
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self.addnamespace(n)
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bnames = lambda repo: repo.branchmap().keys()
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bnamemap = lambda repo, name: tolist(repo.branchtip(name, True))
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bnodemap = lambda repo, node: [repo[node].branch()]
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n = namespace("branches", templatename="branch", listnames=bnames,
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namemap=bnamemap, nodemap=bnodemap)
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self.addnamespace(n)
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def __getitem__(self, namespace):
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"""returns the namespace object"""
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return self._names[namespace]
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def __iter__(self):
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return self._names.__iter__()
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def iteritems(self):
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return self._names.iteritems()
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def addnamespace(self, namespace, order=None):
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"""register a namespace
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namespace: the name to be registered (in plural form)
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order: optional argument to specify the order of namespaces
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(e.g. 'branches' should be listed before 'bookmarks')
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"""
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if order is not None:
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self._names.insert(order, namespace.name, namespace)
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else:
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self._names[namespace.name] = namespace
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# we only generate a template keyword if one does not already exist
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if namespace.name not in templatekw.keywords:
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def generatekw(**args):
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return templatekw.shownames(namespace.name, **args)
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templatekw.keywords[namespace.name] = generatekw
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def singlenode(self, repo, name):
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"""
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Return the 'best' node for the given name. Best means the first node
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in the first nonempty list returned by a name-to-nodes mapping function
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in the defined precedence order.
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Raises a KeyError if there is no such node.
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"""
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for ns, v in self._names.iteritems():
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n = v.namemap(repo, name)
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if n:
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# return max revision number
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if len(n) > 1:
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cl = repo.changelog
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maxrev = max(cl.rev(node) for node in n)
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return cl.node(maxrev)
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return n[0]
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raise KeyError(_('no such name: %s') % name)
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class namespace(object):
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"""provides an interface to a namespace
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Namespaces are basically generic many-to-many mapping between some
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(namespaced) names and nodes. The goal here is to control the pollution of
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jamming things into tags or bookmarks (in extension-land) and to simplify
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internal bits of mercurial: log output, tab completion, etc.
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More precisely, we define a mapping of names to nodes, and a mapping from
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nodes to names. Each mapping returns a list.
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Furthermore, each name mapping will be passed a name to lookup which might
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not be in its domain. In this case, each method should return an empty list
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and not raise an error.
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This namespace object will define the properties we need:
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'name': the namespace (plural form)
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'templatename': name to use for templating (usually the singular form
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of the plural namespace name)
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'listnames': list of all names in the namespace (usually the keys of a
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dictionary)
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'namemap': function that takes a name and returns a list of nodes
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'nodemap': function that takes a node and returns a list of names
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"""
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def __init__(self, name, templatename=None, logname=None, listnames=None,
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namemap=None, nodemap=None):
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"""create a namespace
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name: the namespace to be registered (in plural form)
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templatename: the name to use for templating
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logname: the name to use for log output; if not specified templatename
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is used
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listnames: function to list all names
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namemap: function that inputs a node, output name(s)
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nodemap: function that inputs a name, output node(s)
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"""
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self.name = name
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self.templatename = templatename
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self.logname = logname
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self.listnames = listnames
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self.namemap = namemap
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self.nodemap = nodemap
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# if logname is not specified, use the template name as backup
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if self.logname is None:
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self.logname = self.templatename
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def names(self, repo, node):
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"""method that returns a (sorted) list of names in a namespace that
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match a given node"""
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return sorted(self.nodemap(repo, node))
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def nodes(self, repo, name):
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"""method that returns a list of nodes in a namespace that
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match a given name.
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"""
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return sorted(self.namemap(repo, name))
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