Mercurial > hg
annotate mercurial/namespaces.py @ 32129:f0ea0f642627
py3: make posix.getuser return a bytes
author | Pulkit Goyal <7895pulkit@gmail.com> |
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date | Fri, 21 Apr 2017 00:53:38 +0530 |
parents | ca52512ac709 |
children | bd872f64a8ba |
rev | line source |
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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, node: repo.nodebookmarks(node) |
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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, node: repo.nodetags(node) |
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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 name, output node(s) |
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153 nodemap: function that inputs a node, output name(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)) |