Mercurial > hg
annotate mercurial/namespaces.py @ 50076:63c4e9639753
dirstate: generalize the dirstate's invalidation on transaction abort
The previous code was too specific, we should add the invalidation at next to
the `addfilegenerator` in the `write` call.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Thu, 16 Feb 2023 02:34:54 +0100 |
parents | 642e31cb55f0 |
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1 from .i18n import _ |
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2 from . import ( |
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3 registrar, |
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4 templatekw, |
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5 util, |
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6 ) |
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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 |
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19 class namespaces: |
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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( |
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37 b"bookmarks", |
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38 templatename=b"bookmark", |
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39 logfmt=columns[b'bookmark'], |
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40 listnames=bmknames, |
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41 namemap=bmknamemap, |
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42 nodemap=bmknodemap, |
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43 builtin=True, |
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44 ) |
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45 self.addnamespace(n) |
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46 |
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47 tagnames = lambda repo: [t for t, n in repo.tagslist()] |
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48 tagnamemap = lambda repo, name: tolist(repo._tagscache.tags.get(name)) |
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49 tagnodemap = lambda repo, node: repo.nodetags(node) |
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50 n = namespace( |
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51 b"tags", |
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52 templatename=b"tag", |
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53 logfmt=columns[b'tag'], |
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54 listnames=tagnames, |
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55 namemap=tagnamemap, |
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56 nodemap=tagnodemap, |
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57 deprecated={b'tip'}, |
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58 builtin=True, |
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59 ) |
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60 self.addnamespace(n) |
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61 |
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62 bnames = lambda repo: repo.branchmap().keys() |
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63 bnamemap = lambda repo, name: tolist(repo.branchtip(name, True)) |
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64 bnodemap = lambda repo, node: [repo[node].branch()] |
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65 n = namespace( |
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66 b"branches", |
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67 templatename=b"branch", |
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68 logfmt=columns[b'branch'], |
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69 listnames=bnames, |
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70 namemap=bnamemap, |
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71 nodemap=bnodemap, |
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72 builtin=True, |
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73 ) |
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74 self.addnamespace(n) |
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75 |
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76 def __getitem__(self, namespace): |
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77 """returns the namespace object""" |
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78 return self._names[namespace] |
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79 |
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80 def __iter__(self): |
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81 return self._names.__iter__() |
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82 |
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83 def get(self, namespace, default=None): |
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84 return self._names.get(namespace, default) |
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85 |
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86 def items(self): |
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87 return self._names.items() |
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88 |
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89 iteritems = items |
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90 |
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91 def addnamespace(self, namespace, order=None): |
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92 """register a namespace |
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93 |
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94 namespace: the name to be registered (in plural form) |
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95 order: optional argument to specify the order of namespaces |
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96 (e.g. 'branches' should be listed before 'bookmarks') |
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97 |
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98 """ |
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99 if order is not None: |
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100 self._names.insert(order, namespace.name, namespace) |
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101 else: |
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102 self._names[namespace.name] = namespace |
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103 |
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104 # we only generate a template keyword if one does not already exist |
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105 if namespace.name not in templatekw.keywords: |
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106 templatekeyword = registrar.templatekeyword(templatekw.keywords) |
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107 |
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108 @templatekeyword(namespace.name, requires={b'repo', b'ctx'}) |
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109 def generatekw(context, mapping): |
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110 return templatekw.shownames(context, mapping, namespace.name) |
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111 |
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112 def singlenode(self, repo, name): |
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113 """ |
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114 Return the 'best' node for the given name. What's best is defined |
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115 by the namespace's singlenode() function. The first match returned by |
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116 a namespace in the defined precedence order is used. |
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117 |
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118 Raises a KeyError if there is no such node. |
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119 """ |
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120 for ns, v in self._names.items(): |
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121 n = v.singlenode(repo, name) |
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122 if n: |
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123 return n |
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124 raise KeyError(_(b'no such name: %s') % name) |
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125 |
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126 |
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127 class namespace: |
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128 """provides an interface to a namespace |
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129 |
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130 Namespaces are basically generic many-to-many mapping between some |
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131 (namespaced) names and nodes. The goal here is to control the pollution of |
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132 jamming things into tags or bookmarks (in extension-land) and to simplify |
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133 internal bits of mercurial: log output, tab completion, etc. |
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134 |
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135 More precisely, we define a mapping of names to nodes, and a mapping from |
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136 nodes to names. Each mapping returns a list. |
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137 |
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138 Furthermore, each name mapping will be passed a name to lookup which might |
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139 not be in its domain. In this case, each method should return an empty list |
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140 and not raise an error. |
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141 |
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142 This namespace object will define the properties we need: |
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143 'name': the namespace (plural form) |
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144 'templatename': name to use for templating (usually the singular form |
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145 of the plural namespace name) |
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146 'listnames': list of all names in the namespace (usually the keys of a |
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147 dictionary) |
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148 'namemap': function that takes a name and returns a list of nodes |
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149 'nodemap': function that takes a node and returns a list of names |
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150 'deprecated': set of names to be masked for ordinary use |
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151 'builtin': bool indicating if this namespace is supported by core |
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152 Mercurial. |
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153 """ |
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154 |
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155 def __init__( |
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156 self, |
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157 name, |
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158 templatename=None, |
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159 logname=None, |
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160 colorname=None, |
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161 logfmt=None, |
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162 listnames=None, |
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163 namemap=None, |
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164 nodemap=None, |
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165 deprecated=None, |
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166 builtin=False, |
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167 singlenode=None, |
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168 ): |
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169 """create a namespace |
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170 |
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171 name: the namespace to be registered (in plural form) |
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172 templatename: the name to use for templating |
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173 logname: the name to use for log output; if not specified templatename |
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174 is used |
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175 colorname: the name to use for colored log output; if not specified |
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176 logname is used |
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177 logfmt: the format to use for (i18n-ed) log output; if not specified |
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178 it is composed from logname |
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179 listnames: function to list all names |
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180 namemap: function that inputs a name, output node(s) |
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181 nodemap: function that inputs a node, output name(s) |
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182 deprecated: set of names to be masked for ordinary use |
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183 builtin: whether namespace is implemented by core Mercurial |
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184 singlenode: function that inputs a name, output best node (or None) |
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185 """ |
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186 self.name = name |
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187 self.templatename = templatename |
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188 self.logname = logname |
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189 self.colorname = colorname |
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190 self.logfmt = logfmt |
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191 self.listnames = listnames |
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192 self.namemap = namemap |
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193 self.nodemap = nodemap |
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194 if singlenode: |
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195 self.singlenode = singlenode |
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196 |
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197 # if logname is not specified, use the template name as backup |
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198 if self.logname is None: |
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199 self.logname = self.templatename |
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200 |
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201 # if colorname is not specified, just use the logname as a backup |
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202 if self.colorname is None: |
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203 self.colorname = self.logname |
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204 |
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205 # if logfmt is not specified, compose it from logname as backup |
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206 if self.logfmt is None: |
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207 # i18n: column positioning for "hg log" |
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208 self.logfmt = (b"%s:" % self.logname).ljust(13) + b"%s\n" |
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209 |
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210 if deprecated is None: |
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211 self.deprecated = set() |
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212 else: |
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213 self.deprecated = deprecated |
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214 |
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215 self.builtin = builtin |
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216 |
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217 def names(self, repo, node): |
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218 """method that returns a (sorted) list of names in a namespace that |
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219 match a given node""" |
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220 return sorted(self.nodemap(repo, node)) |
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221 |
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222 def nodes(self, repo, name): |
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223 """method that returns a list of nodes in a namespace that |
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224 match a given name. |
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225 |
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226 """ |
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227 return sorted(self.namemap(repo, name)) |
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228 |
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229 def singlenode(self, repo, name): |
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230 """returns the best node for the given name |
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231 |
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232 By default, the best node is the node from nodes() with the highest |
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233 revision number. It can be overriden by the namespace.""" |
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234 n = self.namemap(repo, name) |
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235 if n: |
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236 # return max revision number |
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237 if len(n) > 1: |
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238 cl = repo.changelog |
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239 maxrev = max(cl.rev(node) for node in n) |
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240 return cl.node(maxrev) |
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241 return n[0] |
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242 return None |