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from .i18n import _
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from . import (
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registrar,
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templatekw,
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util,
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)
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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:
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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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columns = templatekw.getlogcolumns()
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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, node: repo.nodebookmarks(node)
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n = namespace(
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b"bookmarks",
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templatename=b"bookmark",
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logfmt=columns[b'bookmark'],
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listnames=bmknames,
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namemap=bmknamemap,
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nodemap=bmknodemap,
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builtin=True,
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)
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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, node: repo.nodetags(node)
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n = namespace(
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b"tags",
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templatename=b"tag",
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logfmt=columns[b'tag'],
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listnames=tagnames,
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namemap=tagnamemap,
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nodemap=tagnodemap,
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deprecated={b'tip'},
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builtin=True,
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)
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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(
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b"branches",
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templatename=b"branch",
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logfmt=columns[b'branch'],
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listnames=bnames,
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namemap=bnamemap,
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nodemap=bnodemap,
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builtin=True,
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)
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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 get(self, namespace, default=None):
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return self._names.get(namespace, default)
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def items(self):
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return self._names.items()
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iteritems = items
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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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templatekeyword = registrar.templatekeyword(templatekw.keywords)
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@templatekeyword(namespace.name, requires={b'repo', b'ctx'})
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def generatekw(context, mapping):
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return templatekw.shownames(context, mapping, namespace.name)
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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. What's best is defined
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by the namespace's singlenode() function. The first match returned by
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a namespace in the defined precedence order is used.
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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.items():
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n = v.singlenode(repo, name)
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if n:
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return n
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raise KeyError(_(b'no such name: %s') % name)
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class namespace:
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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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'deprecated': set of names to be masked for ordinary use
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'builtin': bool indicating if this namespace is supported by core
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Mercurial.
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"""
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def __init__(
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self,
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name,
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templatename=None,
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logname=None,
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colorname=None,
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logfmt=None,
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listnames=None,
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namemap=None,
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nodemap=None,
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deprecated=None,
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builtin=False,
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singlenode=None,
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):
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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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colorname: the name to use for colored log output; if not specified
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logname is used
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logfmt: the format to use for (i18n-ed) log output; if not specified
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it is composed from logname
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listnames: function to list all names
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namemap: function that inputs a name, output node(s)
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nodemap: function that inputs a node, output name(s)
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deprecated: set of names to be masked for ordinary use
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builtin: whether namespace is implemented by core Mercurial
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singlenode: function that inputs a name, output best node (or None)
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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.colorname = colorname
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self.logfmt = logfmt
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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 singlenode:
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self.singlenode = singlenode
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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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# if colorname is not specified, just use the logname as a backup
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if self.colorname is None:
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self.colorname = self.logname
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# if logfmt is not specified, compose it from logname as backup
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if self.logfmt is None:
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# i18n: column positioning for "hg log"
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self.logfmt = (b"%s:" % self.logname).ljust(13) + b"%s\n"
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if deprecated is None:
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self.deprecated = set()
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else:
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self.deprecated = deprecated
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self.builtin = builtin
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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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def singlenode(self, repo, name):
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"""returns the best node for the given name
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By default, the best node is the node from nodes() with the highest
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revision number. It can be overriden by the namespace."""
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n = self.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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return None
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