mirror of
https://github.com/facebook/sapling.git
synced 2024-10-11 09:17:30 +03:00
82715fd2ea
Reviewed By: quark-zju Differential Revision: D19608323 fbshipit-source-id: dd186ef16d6422a56af41fcaa850d9838ae9a240
252 lines
8.2 KiB
Python
252 lines
8.2 KiB
Python
# Portions Copyright (c) Facebook, Inc. and its affiliates.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2.
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# Copyright 2014 Mercurial Contributors
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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from . import error, pycompat, registrar, templatekw, util
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from .i18n import _
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namespacetable = util.sortdict()
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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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# Do not use builtinnamespace in extension code. Use `registrar.namespacetable`
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# instead.
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builtinnamespace = registrar.namespacepredicate(namespacetable)
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@builtinnamespace("bookmarks", priority=10)
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def bookmarks(repo):
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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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return namespace(
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templatename="bookmark",
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logfmt=templatekw.getlogcolumns()["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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@builtinnamespace("branches", priority=30)
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def branches(repo):
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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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return namespace(
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templatename="branch",
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logfmt=templatekw.getlogcolumns()["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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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, repo):
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self._names = util.sortdict()
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# Insert namespaces specified in the namespacetable, sorted
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# by priority.
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def sortkey(tup):
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name, func = tup
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return (func._priority, name)
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for name, func in sorted(namespacetable.items(), key=sortkey):
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ns = func(repo)
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if ns is not None:
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self._addnamespace(name, ns)
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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 items(self):
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return pycompat.iteritems(self._names)
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iteritems = items
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def _addnamespace(self, name, namespace):
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"""register a namespace
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name: the name to be registered (in plural form)
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namespace: namespace to be registered
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"""
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self._names[name] = namespace
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# we only generate a template keyword if one does not already exist
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if name not in templatekw.keywords:
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def generatekw(**args):
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return templatekw.shownames(name, **args)
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templatekw.keywords[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 pycompat.iteritems(self._names):
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# Fast path: do not consider branches unless it's "default".
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if ns == "branches" and name != "default":
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continue
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n = v.namemap(repo, name)
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if n:
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v.accessed(repo, name)
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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 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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'accessed': function, that is used to log if the name from the namespace
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was accessed. The method helps to build metrics around name
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"access" event.
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"""
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def __init__(
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self,
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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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accessed=None,
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):
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"""create a namespace
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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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accessed: function, that is used to log if the name from the namespace
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was accessed
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"""
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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 accessed is not None:
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self.accessed = accessed
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else:
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self.accessed = lambda repo, name: None
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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 = ("%s:" % self.logname).ljust(13) + "%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 loadpredicate(ui, extname, registrarobj):
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for name, ns in pycompat.iteritems(registrarobj._table):
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if name in namespacetable:
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raise error.ProgrammingError("namespace '%s' is already registered", name)
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namespacetable[name] = ns
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