annotate mercurial/namespaces.py @ 26320:3ac7acb99b04

localrepo: call lock.lock with releasefn as a keyword arg We'll be adding an acquirefn argument soon, and this makes that clearer.
author Siddharth Agarwal <sid0@fb.com>
date Tue, 22 Sep 2015 13:25:41 -0700
parents c0c89b2d07be
children ca52512ac709
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c0c89b2d07be namespaces: use absolute_import
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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
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29 # we need current mercurial named objects (bookmarks, tags, and
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30 # branches) to be initialized somewhere, so that place is here
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31 bmknames = lambda repo: repo._bookmarks.keys()
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32 bmknamemap = lambda repo, name: tolist(repo._bookmarks.get(name))
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33 bmknodemap = lambda repo, name: repo.nodebookmarks(name)
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34 n = namespace("bookmarks", templatename="bookmark",
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35 # i18n: column positioning for "hg log"
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36 logfmt=_("bookmark: %s\n"),
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37 listnames=bmknames,
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38 namemap=bmknamemap, nodemap=bmknodemap)
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39 self.addnamespace(n)
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40
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41 tagnames = lambda repo: [t for t, n in repo.tagslist()]
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42 tagnamemap = lambda repo, name: tolist(repo._tagscache.tags.get(name))
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43 tagnodemap = lambda repo, name: repo.nodetags(name)
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44 n = namespace("tags", templatename="tag",
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45 # i18n: column positioning for "hg log"
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46 logfmt=_("tag: %s\n"),
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47 listnames=tagnames,
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48 namemap=tagnamemap, nodemap=tagnodemap,
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49 deprecated=set(['tip']))
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50 self.addnamespace(n)
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51
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52 bnames = lambda repo: repo.branchmap().keys()
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53 bnamemap = lambda repo, name: tolist(repo.branchtip(name, True))
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54 bnodemap = lambda repo, node: [repo[node].branch()]
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55 n = namespace("branches", templatename="branch",
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56 # i18n: column positioning for "hg log"
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57 logfmt=_("branch: %s\n"),
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58 listnames=bnames,
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59 namemap=bnamemap, nodemap=bnodemap)
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60 self.addnamespace(n)
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61
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62 def __getitem__(self, namespace):
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63 """returns the namespace object"""
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64 return self._names[namespace]
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65
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66 def __iter__(self):
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67 return self._names.__iter__()
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68
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69 def iteritems(self):
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70 return self._names.iteritems()
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71
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72 def addnamespace(self, namespace, order=None):
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73 """register a namespace
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74
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75 namespace: the name to be registered (in plural form)
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76 order: optional argument to specify the order of namespaces
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77 (e.g. 'branches' should be listed before 'bookmarks')
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78
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79 """
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80 if order is not None:
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81 self._names.insert(order, namespace.name, namespace)
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82 else:
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83 self._names[namespace.name] = namespace
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84
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85 # we only generate a template keyword if one does not already exist
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86 if namespace.name not in templatekw.keywords:
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87 def generatekw(**args):
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88 return templatekw.shownames(namespace.name, **args)
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89
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90 templatekw.keywords[namespace.name] = generatekw
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91
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92 def singlenode(self, repo, name):
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93 """
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94 Return the 'best' node for the given name. Best means the first node
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95 in the first nonempty list returned by a name-to-nodes mapping function
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96 in the defined precedence order.
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97
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98 Raises a KeyError if there is no such node.
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99 """
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100 for ns, v in self._names.iteritems():
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101 n = v.namemap(repo, name)
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102 if n:
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103 # return max revision number
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104 if len(n) > 1:
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105 cl = repo.changelog
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106 maxrev = max(cl.rev(node) for node in n)
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107 return cl.node(maxrev)
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108 return n[0]
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109 raise KeyError(_('no such name: %s') % name)
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110
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111 class namespace(object):
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112 """provides an interface to a namespace
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113
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114 Namespaces are basically generic many-to-many mapping between some
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115 (namespaced) names and nodes. The goal here is to control the pollution of
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116 jamming things into tags or bookmarks (in extension-land) and to simplify
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117 internal bits of mercurial: log output, tab completion, etc.
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118
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119 More precisely, we define a mapping of names to nodes, and a mapping from
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120 nodes to names. Each mapping returns a list.
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121
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122 Furthermore, each name mapping will be passed a name to lookup which might
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123 not be in its domain. In this case, each method should return an empty list
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124 and not raise an error.
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125
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126 This namespace object will define the properties we need:
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127 'name': the namespace (plural form)
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128 'templatename': name to use for templating (usually the singular form
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129 of the plural namespace name)
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130 'listnames': list of all names in the namespace (usually the keys of a
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131 dictionary)
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132 'namemap': function that takes a name and returns a list of nodes
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133 'nodemap': function that takes a node and returns a list of names
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134 'deprecated': set of names to be masked for ordinary use
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135
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136 """
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137
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138 def __init__(self, name, templatename=None, logname=None, colorname=None,
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139 logfmt=None, listnames=None, namemap=None, nodemap=None,
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140 deprecated=None):
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141 """create a namespace
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142
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143 name: the namespace to be registered (in plural form)
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144 templatename: the name to use for templating
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145 logname: the name to use for log output; if not specified templatename
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146 is used
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147 colorname: the name to use for colored log output; if not specified
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148 logname is used
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149 logfmt: the format to use for (i18n-ed) log output; if not specified
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150 it is composed from logname
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151 listnames: function to list all names
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152 namemap: function that inputs a node, output name(s)
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153 nodemap: function that inputs a name, output node(s)
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154 deprecated: set of names to be masked for ordinary use
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155
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156 """
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157 self.name = name
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158 self.templatename = templatename
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159 self.logname = logname
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160 self.colorname = colorname
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161 self.logfmt = logfmt
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162 self.listnames = listnames
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163 self.namemap = namemap
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164 self.nodemap = nodemap
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165
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166 # if logname is not specified, use the template name as backup
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167 if self.logname is None:
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168 self.logname = self.templatename
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169
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170 # if colorname is not specified, just use the logname as a backup
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171 if self.colorname is None:
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172 self.colorname = self.logname
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173
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174 # if logfmt is not specified, compose it from logname as backup
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175 if self.logfmt is None:
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176 # i18n: column positioning for "hg log"
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177 self.logfmt = ("%s:" % self.logname).ljust(13) + "%s\n"
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178
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179 if deprecated is None:
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180 self.deprecated = set()
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181 else:
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182 self.deprecated = deprecated
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183
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184 def names(self, repo, node):
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185 """method that returns a (sorted) list of names in a namespace that
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186 match a given node"""
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187 return sorted(self.nodemap(repo, node))
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188
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189 def nodes(self, repo, name):
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190 """method that returns a list of nodes in a namespace that
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191 match a given name.
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192
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193 """
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194 return sorted(self.namemap(repo, name))