annotate mercurial/namespaces.py @ 36382:b4d1c09b754b

py3: add missing b'' in test-arbitraryfilectx.t # skip-blame as just b'' prefix
author Pulkit Goyal <7895pulkit@gmail.com>
date Fri, 23 Feb 2018 18:12:20 +0530
parents c7b45db8f317
children b0054f3c055a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 from __future__ import absolute_import
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2
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3 from .i18n import _
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4 from . import (
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5 templatekw,
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6 util,
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7 )
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8
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9 def tolist(val):
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10 """
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11 a convenience method to return an empty list instead of None
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12 """
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13 if val is None:
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14 return []
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15 else:
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16 return [val]
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17
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18 class namespaces(object):
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19 """provides an interface to register and operate on multiple namespaces. See
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20 the namespace class below for details on the namespace object.
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21
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22 """
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23
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24 _names_version = 0
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25
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26 def __init__(self):
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27 self._names = util.sortdict()
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28 columns = templatekw.getlogcolumns()
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29
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30 # we need current mercurial named objects (bookmarks, tags, and
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31 # branches) to be initialized somewhere, so that place is here
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32 bmknames = lambda repo: repo._bookmarks.keys()
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33 bmknamemap = lambda repo, name: tolist(repo._bookmarks.get(name))
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34 bmknodemap = lambda repo, node: repo.nodebookmarks(node)
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35 n = namespace("bookmarks", templatename="bookmark",
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36 logfmt=columns['bookmark'],
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37 listnames=bmknames,
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38 namemap=bmknamemap, nodemap=bmknodemap,
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39 builtin=True)
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40 self.addnamespace(n)
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41
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42 tagnames = lambda repo: [t for t, n in repo.tagslist()]
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43 tagnamemap = lambda repo, name: tolist(repo._tagscache.tags.get(name))
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44 tagnodemap = lambda repo, node: repo.nodetags(node)
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45 n = namespace("tags", templatename="tag",
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46 logfmt=columns['tag'],
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47 listnames=tagnames,
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48 namemap=tagnamemap, nodemap=tagnodemap,
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49 deprecated={'tip'},
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50 builtin=True)
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51 self.addnamespace(n)
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52
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53 bnames = lambda repo: repo.branchmap().keys()
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54 bnamemap = lambda repo, name: tolist(repo.branchtip(name, True))
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55 bnodemap = lambda repo, node: [repo[node].branch()]
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56 n = namespace("branches", templatename="branch",
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57 logfmt=columns['branch'],
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58 listnames=bnames,
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59 namemap=bnamemap, nodemap=bnodemap,
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60 builtin=True)
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61 self.addnamespace(n)
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62
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63 def __getitem__(self, namespace):
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64 """returns the namespace object"""
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65 return self._names[namespace]
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66
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67 def __iter__(self):
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68 return self._names.__iter__()
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69
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70 def items(self):
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71 return self._names.iteritems()
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72
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73 iteritems = items
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74
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75 def addnamespace(self, namespace, order=None):
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76 """register a namespace
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77
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78 namespace: the name to be registered (in plural form)
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79 order: optional argument to specify the order of namespaces
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80 (e.g. 'branches' should be listed before 'bookmarks')
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81
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82 """
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83 if order is not None:
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84 self._names.insert(order, namespace.name, namespace)
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85 else:
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86 self._names[namespace.name] = namespace
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87
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88 # we only generate a template keyword if one does not already exist
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89 if namespace.name not in templatekw.keywords:
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90 def generatekw(**args):
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91 return templatekw.shownames(namespace.name, **args)
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92
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93 templatekw.keywords[namespace.name] = generatekw
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94
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95 def singlenode(self, repo, name):
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96 """
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97 Return the 'best' node for the given name. Best means the first node
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98 in the first nonempty list returned by a name-to-nodes mapping function
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99 in the defined precedence order.
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100
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101 Raises a KeyError if there is no such node.
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102 """
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103 for ns, v in self._names.iteritems():
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104 n = v.namemap(repo, name)
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105 if n:
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106 # return max revision number
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107 if len(n) > 1:
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108 cl = repo.changelog
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109 maxrev = max(cl.rev(node) for node in n)
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110 return cl.node(maxrev)
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111 return n[0]
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112 raise KeyError(_('no such name: %s') % name)
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113
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114 class namespace(object):
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115 """provides an interface to a namespace
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116
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117 Namespaces are basically generic many-to-many mapping between some
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118 (namespaced) names and nodes. The goal here is to control the pollution of
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119 jamming things into tags or bookmarks (in extension-land) and to simplify
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120 internal bits of mercurial: log output, tab completion, etc.
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121
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122 More precisely, we define a mapping of names to nodes, and a mapping from
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123 nodes to names. Each mapping returns a list.
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124
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125 Furthermore, each name mapping will be passed a name to lookup which might
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126 not be in its domain. In this case, each method should return an empty list
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127 and not raise an error.
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128
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129 This namespace object will define the properties we need:
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130 'name': the namespace (plural form)
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131 'templatename': name to use for templating (usually the singular form
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132 of the plural namespace name)
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133 'listnames': list of all names in the namespace (usually the keys of a
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134 dictionary)
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135 'namemap': function that takes a name and returns a list of nodes
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136 'nodemap': function that takes a node and returns a list of names
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137 'deprecated': set of names to be masked for ordinary use
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138 'builtin': bool indicating if this namespace is supported by core
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139 Mercurial.
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140 """
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141
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142 def __init__(self, name, templatename=None, logname=None, colorname=None,
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143 logfmt=None, listnames=None, namemap=None, nodemap=None,
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144 deprecated=None, builtin=False):
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145 """create a namespace
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146
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147 name: the namespace to be registered (in plural form)
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148 templatename: the name to use for templating
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149 logname: the name to use for log output; if not specified templatename
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150 is used
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151 colorname: the name to use for colored log output; if not specified
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152 logname is used
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153 logfmt: the format to use for (i18n-ed) log output; if not specified
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154 it is composed from logname
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155 listnames: function to list all names
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156 namemap: function that inputs a name, output node(s)
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157 nodemap: function that inputs a node, output name(s)
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158 deprecated: set of names to be masked for ordinary use
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159 builtin: whether namespace is implemented by core Mercurial
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160 """
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161 self.name = name
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162 self.templatename = templatename
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163 self.logname = logname
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164 self.colorname = colorname
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165 self.logfmt = logfmt
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166 self.listnames = listnames
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167 self.namemap = namemap
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168 self.nodemap = nodemap
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169
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170 # if logname is not specified, use the template name as backup
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171 if self.logname is None:
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172 self.logname = self.templatename
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173
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174 # if colorname is not specified, just use the logname as a backup
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175 if self.colorname is None:
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176 self.colorname = self.logname
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177
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178 # if logfmt is not specified, compose it from logname as backup
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179 if self.logfmt is None:
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180 # i18n: column positioning for "hg log"
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181 self.logfmt = ("%s:" % self.logname).ljust(13) + "%s\n"
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182
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183 if deprecated is None:
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184 self.deprecated = set()
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185 else:
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186 self.deprecated = deprecated
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187
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188 self.builtin = builtin
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189
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190 def names(self, repo, node):
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191 """method that returns a (sorted) list of names in a namespace that
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192 match a given node"""
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193 return sorted(self.nodemap(repo, node))
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194
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195 def nodes(self, repo, name):
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196 """method that returns a list of nodes in a namespace that
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197 match a given name.
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198
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199 """
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200 return sorted(self.namemap(repo, name))