Mercurial > hg
annotate mercurial/namespaces.py @ 45237:39f4ec4039a8
commitctx: move a special case about files earlier
Same logic as a changeset a bit earlier, the `writefilecopymeta` section is more
a post processing details so we move the conditional about `files` value closer
to the rest of the code computing `files` value.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Thu, 23 Jul 2020 23:40:59 +0200 |
parents | 59ad165f6cdb |
children | 6000f5b25c9b |
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 pycompat, |
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6 registrar, |
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7 templatekw, |
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8 util, |
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9 ) |
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10 |
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11 |
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12 def tolist(val): |
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13 """ |
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14 a convenience method to return an empty list instead of None |
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15 """ |
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16 if val is None: |
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17 return [] |
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18 else: |
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19 return [val] |
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20 |
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21 |
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22 class namespaces(object): |
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23 """provides an interface to register and operate on multiple namespaces. See |
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24 the namespace class below for details on the namespace object. |
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25 |
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26 """ |
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27 |
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28 _names_version = 0 |
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29 |
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30 def __init__(self): |
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31 self._names = util.sortdict() |
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32 columns = templatekw.getlogcolumns() |
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33 |
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34 # we need current mercurial named objects (bookmarks, tags, and |
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35 # branches) to be initialized somewhere, so that place is here |
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36 bmknames = lambda repo: repo._bookmarks.keys() |
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37 bmknamemap = lambda repo, name: tolist(repo._bookmarks.get(name)) |
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38 bmknodemap = lambda repo, node: repo.nodebookmarks(node) |
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39 n = namespace( |
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40 b"bookmarks", |
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41 templatename=b"bookmark", |
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42 logfmt=columns[b'bookmark'], |
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43 listnames=bmknames, |
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44 namemap=bmknamemap, |
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45 nodemap=bmknodemap, |
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46 builtin=True, |
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47 ) |
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48 self.addnamespace(n) |
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49 |
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50 tagnames = lambda repo: [t for t, n in repo.tagslist()] |
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51 tagnamemap = lambda repo, name: tolist(repo._tagscache.tags.get(name)) |
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52 tagnodemap = lambda repo, node: repo.nodetags(node) |
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53 n = namespace( |
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54 b"tags", |
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55 templatename=b"tag", |
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56 logfmt=columns[b'tag'], |
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57 listnames=tagnames, |
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58 namemap=tagnamemap, |
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59 nodemap=tagnodemap, |
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60 deprecated={b'tip'}, |
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61 builtin=True, |
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62 ) |
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63 self.addnamespace(n) |
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64 |
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65 bnames = lambda repo: repo.branchmap().keys() |
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66 bnamemap = lambda repo, name: tolist(repo.branchtip(name, True)) |
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67 bnodemap = lambda repo, node: [repo[node].branch()] |
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68 n = namespace( |
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69 b"branches", |
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70 templatename=b"branch", |
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71 logfmt=columns[b'branch'], |
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72 listnames=bnames, |
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73 namemap=bnamemap, |
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74 nodemap=bnodemap, |
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75 builtin=True, |
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76 ) |
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77 self.addnamespace(n) |
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78 |
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79 def __getitem__(self, namespace): |
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80 """returns the namespace object""" |
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81 return self._names[namespace] |
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82 |
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83 def __iter__(self): |
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84 return self._names.__iter__() |
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85 |
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86 def get(self, namespace, default=None): |
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87 return self._names.get(namespace, default) |
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88 |
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89 def items(self): |
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90 return pycompat.iteritems(self._names) |
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91 |
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92 iteritems = items |
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93 |
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94 def addnamespace(self, namespace, order=None): |
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95 """register a namespace |
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96 |
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97 namespace: the name to be registered (in plural form) |
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98 order: optional argument to specify the order of namespaces |
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99 (e.g. 'branches' should be listed before 'bookmarks') |
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100 |
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101 """ |
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102 if order is not None: |
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103 self._names.insert(order, namespace.name, namespace) |
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104 else: |
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105 self._names[namespace.name] = namespace |
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106 |
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107 # we only generate a template keyword if one does not already exist |
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108 if namespace.name not in templatekw.keywords: |
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109 templatekeyword = registrar.templatekeyword(templatekw.keywords) |
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110 |
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111 @templatekeyword(namespace.name, requires={b'repo', b'ctx'}) |
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112 def generatekw(context, mapping): |
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113 return templatekw.shownames(context, mapping, namespace.name) |
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114 |
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115 def singlenode(self, repo, name): |
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116 """ |
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117 Return the 'best' node for the given name. What's best is defined |
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118 by the namespace's singlenode() function. The first match returned by |
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119 a namespace in the defined precedence order is used. |
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120 |
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121 Raises a KeyError if there is no such node. |
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122 """ |
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123 for ns, v in pycompat.iteritems(self._names): |
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124 n = v.singlenode(repo, name) |
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125 if n: |
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126 return n |
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127 raise KeyError(_(b'no such name: %s') % name) |
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128 |
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129 |
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130 class namespace(object): |
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131 """provides an interface to a namespace |
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132 |
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133 Namespaces are basically generic many-to-many mapping between some |
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134 (namespaced) names and nodes. The goal here is to control the pollution of |
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135 jamming things into tags or bookmarks (in extension-land) and to simplify |
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136 internal bits of mercurial: log output, tab completion, etc. |
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137 |
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138 More precisely, we define a mapping of names to nodes, and a mapping from |
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139 nodes to names. Each mapping returns a list. |
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140 |
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141 Furthermore, each name mapping will be passed a name to lookup which might |
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142 not be in its domain. In this case, each method should return an empty list |
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143 and not raise an error. |
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144 |
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145 This namespace object will define the properties we need: |
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146 'name': the namespace (plural form) |
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147 'templatename': name to use for templating (usually the singular form |
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148 of the plural namespace name) |
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149 'listnames': list of all names in the namespace (usually the keys of a |
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150 dictionary) |
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151 'namemap': function that takes a name and returns a list of nodes |
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152 'nodemap': function that takes a node and returns a list of names |
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153 'deprecated': set of names to be masked for ordinary use |
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154 'builtin': bool indicating if this namespace is supported by core |
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155 Mercurial. |
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156 """ |
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157 |
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158 def __init__( |
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159 self, |
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160 name, |
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161 templatename=None, |
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162 logname=None, |
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163 colorname=None, |
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164 logfmt=None, |
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165 listnames=None, |
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166 namemap=None, |
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167 nodemap=None, |
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168 deprecated=None, |
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169 builtin=False, |
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170 singlenode=None, |
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171 ): |
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172 """create a namespace |
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173 |
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174 name: the namespace to be registered (in plural form) |
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175 templatename: the name to use for templating |
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176 logname: the name to use for log output; if not specified templatename |
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177 is used |
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178 colorname: the name to use for colored log output; if not specified |
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179 logname is used |
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180 logfmt: the format to use for (i18n-ed) log output; if not specified |
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181 it is composed from logname |
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182 listnames: function to list all names |
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183 namemap: function that inputs a name, output node(s) |
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184 nodemap: function that inputs a node, output name(s) |
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185 deprecated: set of names to be masked for ordinary use |
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186 builtin: whether namespace is implemented by core Mercurial |
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187 singlenode: function that inputs a name, output best node (or None) |
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188 """ |
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189 self.name = name |
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190 self.templatename = templatename |
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191 self.logname = logname |
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192 self.colorname = colorname |
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193 self.logfmt = logfmt |
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194 self.listnames = listnames |
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195 self.namemap = namemap |
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196 self.nodemap = nodemap |
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197 if singlenode: |
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198 self.singlenode = singlenode |
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199 |
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200 # if logname is not specified, use the template name as backup |
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201 if self.logname is None: |
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202 self.logname = self.templatename |
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203 |
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204 # if colorname is not specified, just use the logname as a backup |
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205 if self.colorname is None: |
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206 self.colorname = self.logname |
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207 |
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208 # if logfmt is not specified, compose it from logname as backup |
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209 if self.logfmt is None: |
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210 # i18n: column positioning for "hg log" |
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211 self.logfmt = (b"%s:" % self.logname).ljust(13) + b"%s\n" |
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212 |
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213 if deprecated is None: |
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214 self.deprecated = set() |
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215 else: |
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216 self.deprecated = deprecated |
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217 |
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218 self.builtin = builtin |
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219 |
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220 def names(self, repo, node): |
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221 """method that returns a (sorted) list of names in a namespace that |
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222 match a given node""" |
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223 return sorted(self.nodemap(repo, node)) |
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224 |
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225 def nodes(self, repo, name): |
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226 """method that returns a list of nodes in a namespace that |
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227 match a given name. |
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228 |
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229 """ |
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230 return sorted(self.namemap(repo, name)) |
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231 |
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232 def singlenode(self, repo, name): |
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233 """returns the best node for the given name |
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234 |
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235 By default, the best node is the node from nodes() with the highest |
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236 revision number. It can be overriden by the namespace.""" |
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237 n = self.namemap(repo, name) |
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238 if n: |
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239 # return max revision number |
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240 if len(n) > 1: |
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241 cl = repo.changelog |
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242 maxrev = max(cl.rev(node) for node in n) |
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243 return cl.node(maxrev) |
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244 return n[0] |
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245 return None |