Mercurial > hg
annotate mercurial/namespaces.py @ 37578:56df2ca5c032
py3: prevent transformer from adding b'' by adding r'' prefix
These are cases where we need to use str, therefore we add r'' prefix.
# skip-blame because just r'' prefixes
Differential Revision: https://phab.mercurial-scm.org/D3276
author | Pulkit Goyal <7895pulkit@gmail.com> |
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date | Thu, 12 Apr 2018 14:28:08 +0530 |
parents | aa97e06a1912 |
children | 4c0683655599 |
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 registrar, |
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6 templatekw, |
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7 util, |
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8 ) |
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9 |
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10 def tolist(val): |
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11 """ |
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12 a convenience method to return an empty list instead of None |
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13 """ |
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14 if val is None: |
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15 return [] |
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16 else: |
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17 return [val] |
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18 |
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19 class namespaces(object): |
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20 """provides an interface to register and operate on multiple namespaces. See |
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21 the namespace class below for details on the namespace object. |
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22 |
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23 """ |
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24 |
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25 _names_version = 0 |
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26 |
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27 def __init__(self): |
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28 self._names = util.sortdict() |
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29 columns = templatekw.getlogcolumns() |
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30 |
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31 # we need current mercurial named objects (bookmarks, tags, and |
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32 # branches) to be initialized somewhere, so that place is here |
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33 bmknames = lambda repo: repo._bookmarks.keys() |
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34 bmknamemap = lambda repo, name: tolist(repo._bookmarks.get(name)) |
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35 bmknodemap = lambda repo, node: repo.nodebookmarks(node) |
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36 n = namespace("bookmarks", templatename="bookmark", |
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37 logfmt=columns['bookmark'], |
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38 listnames=bmknames, |
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39 namemap=bmknamemap, nodemap=bmknodemap, |
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40 builtin=True) |
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41 self.addnamespace(n) |
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42 |
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43 tagnames = lambda repo: [t for t, n in repo.tagslist()] |
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44 tagnamemap = lambda repo, name: tolist(repo._tagscache.tags.get(name)) |
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45 tagnodemap = lambda repo, node: repo.nodetags(node) |
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46 n = namespace("tags", templatename="tag", |
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47 logfmt=columns['tag'], |
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48 listnames=tagnames, |
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49 namemap=tagnamemap, nodemap=tagnodemap, |
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50 deprecated={'tip'}, |
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51 builtin=True) |
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52 self.addnamespace(n) |
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53 |
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54 bnames = lambda repo: repo.branchmap().keys() |
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55 bnamemap = lambda repo, name: tolist(repo.branchtip(name, True)) |
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56 bnodemap = lambda repo, node: [repo[node].branch()] |
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57 n = namespace("branches", templatename="branch", |
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58 logfmt=columns['branch'], |
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59 listnames=bnames, |
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60 namemap=bnamemap, nodemap=bnodemap, |
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61 builtin=True) |
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62 self.addnamespace(n) |
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63 |
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64 def __getitem__(self, namespace): |
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65 """returns the namespace object""" |
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66 return self._names[namespace] |
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67 |
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68 def __iter__(self): |
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69 return self._names.__iter__() |
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70 |
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71 def items(self): |
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72 return self._names.iteritems() |
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73 |
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74 iteritems = items |
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75 |
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76 def addnamespace(self, namespace, order=None): |
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77 """register a namespace |
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78 |
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79 namespace: the name to be registered (in plural form) |
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80 order: optional argument to specify the order of namespaces |
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81 (e.g. 'branches' should be listed before 'bookmarks') |
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82 |
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83 """ |
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84 if order is not None: |
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85 self._names.insert(order, namespace.name, namespace) |
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86 else: |
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87 self._names[namespace.name] = namespace |
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88 |
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89 # we only generate a template keyword if one does not already exist |
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90 if namespace.name not in templatekw.keywords: |
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91 templatekeyword = registrar.templatekeyword(templatekw.keywords) |
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92 @templatekeyword(namespace.name, requires={'repo', 'ctx'}) |
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93 def generatekw(context, mapping): |
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94 return templatekw.shownames(context, mapping, namespace.name) |
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95 |
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96 def singlenode(self, repo, name): |
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97 """ |
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98 Return the 'best' node for the given name. Best means the first node |
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99 in the first nonempty list returned by a name-to-nodes mapping function |
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100 in the defined precedence order. |
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101 |
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102 Raises a KeyError if there is no such node. |
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103 """ |
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104 for ns, v in self._names.iteritems(): |
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105 n = v.namemap(repo, name) |
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106 if n: |
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107 # return max revision number |
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108 if len(n) > 1: |
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109 cl = repo.changelog |
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110 maxrev = max(cl.rev(node) for node in n) |
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111 return cl.node(maxrev) |
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112 return n[0] |
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113 raise KeyError(_('no such name: %s') % name) |
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114 |
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115 class namespace(object): |
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116 """provides an interface to a namespace |
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117 |
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118 Namespaces are basically generic many-to-many mapping between some |
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119 (namespaced) names and nodes. The goal here is to control the pollution of |
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120 jamming things into tags or bookmarks (in extension-land) and to simplify |
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121 internal bits of mercurial: log output, tab completion, etc. |
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122 |
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123 More precisely, we define a mapping of names to nodes, and a mapping from |
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124 nodes to names. Each mapping returns a list. |
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125 |
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126 Furthermore, each name mapping will be passed a name to lookup which might |
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127 not be in its domain. In this case, each method should return an empty list |
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128 and not raise an error. |
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129 |
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130 This namespace object will define the properties we need: |
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131 'name': the namespace (plural form) |
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132 'templatename': name to use for templating (usually the singular form |
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133 of the plural namespace name) |
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134 'listnames': list of all names in the namespace (usually the keys of a |
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135 dictionary) |
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136 'namemap': function that takes a name and returns a list of nodes |
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137 'nodemap': function that takes a node and returns a list of names |
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138 'deprecated': set of names to be masked for ordinary use |
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139 'builtin': bool indicating if this namespace is supported by core |
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140 Mercurial. |
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141 """ |
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142 |
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143 def __init__(self, name, templatename=None, logname=None, colorname=None, |
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144 logfmt=None, listnames=None, namemap=None, nodemap=None, |
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145 deprecated=None, builtin=False): |
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146 """create a namespace |
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147 |
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148 name: the namespace to be registered (in plural form) |
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149 templatename: the name to use for templating |
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150 logname: the name to use for log output; if not specified templatename |
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151 is used |
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152 colorname: the name to use for colored log output; if not specified |
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153 logname is used |
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154 logfmt: the format to use for (i18n-ed) log output; if not specified |
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155 it is composed from logname |
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156 listnames: function to list all names |
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157 namemap: function that inputs a name, output node(s) |
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158 nodemap: function that inputs a node, output name(s) |
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159 deprecated: set of names to be masked for ordinary use |
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160 builtin: whether namespace is implemented by core Mercurial |
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161 """ |
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162 self.name = name |
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163 self.templatename = templatename |
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164 self.logname = logname |
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165 self.colorname = colorname |
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166 self.logfmt = logfmt |
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167 self.listnames = listnames |
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168 self.namemap = namemap |
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169 self.nodemap = nodemap |
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170 |
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171 # if logname is not specified, use the template name as backup |
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172 if self.logname is None: |
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173 self.logname = self.templatename |
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174 |
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175 # if colorname is not specified, just use the logname as a backup |
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176 if self.colorname is None: |
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177 self.colorname = self.logname |
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178 |
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179 # if logfmt is not specified, compose it from logname as backup |
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180 if self.logfmt is None: |
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181 # i18n: column positioning for "hg log" |
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182 self.logfmt = ("%s:" % self.logname).ljust(13) + "%s\n" |
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183 |
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184 if deprecated is None: |
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185 self.deprecated = set() |
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186 else: |
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187 self.deprecated = deprecated |
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188 |
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189 self.builtin = builtin |
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190 |
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191 def names(self, repo, node): |
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192 """method that returns a (sorted) list of names in a namespace that |
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193 match a given node""" |
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194 return sorted(self.nodemap(repo, node)) |
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195 |
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196 def nodes(self, repo, name): |
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197 """method that returns a list of nodes in a namespace that |
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198 match a given name. |
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199 |
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200 """ |
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201 return sorted(self.namemap(repo, name)) |