Mercurial > hgrepos > Python > libs > ConfigMix
annotate configmix/config.py @ 428:090a25f36a3d
FIX: Allow jailed configurations to use correctly use base configurations that use a different "default" marker object.
Jailed configurations assumed that their "default" marker object is
identical to the "default" marker object in the unjailed base
configuration. This is not always true, especially if
"_JailedConfiguration.rebind()" is used.
Removed the explicit "default" keyword argument and passed the complete
keywords argument dictionary to the base instead. This triggers correct
default handling in the base.
| author | Franz Glasner <f.glasner@feldmann-mg.com> |
|---|---|
| date | Thu, 09 Dec 2021 13:02:17 +0100 |
| parents | 84d4f82ffe59 |
| children | b96f49c9c76b |
| rev | line source |
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1 # -*- coding: utf-8 -*- |
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2 # :- |
| 302 | 3 # :Copyright: (c) 2015-2021, Franz Glasner. All rights reserved. |
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4 # :License: BSD-3-Clause. See LICENSE.txt for details. |
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5 # :- |
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6 """The unified configuration dictionary with attribute support or |
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7 variable substitution. |
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8 |
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9 """ |
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10 |
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11 from __future__ import division, absolute_import, print_function |
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12 |
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13 |
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14 __all__ = ["Configuration"] |
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15 |
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16 |
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17 import warnings |
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18 try: |
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19 from collections import OrderedDict as ConfigurationBase |
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20 except ImportError: |
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21 try: |
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22 from ordereddict import OrderedDict as ConfigurationBase |
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23 except ImportError: |
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24 ConfigurationBase = dict |
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25 try: |
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26 from urllib.parse import urlsplit |
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27 except ImportError: |
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28 from urlparse import urlsplit |
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29 |
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30 from .variables import lookup_varns, lookup_filter |
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31 from .compat import u, uchr |
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32 from .constants import REF_NAMESPACE, NONE_FILTER, EMPTY_FILTER |
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33 |
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34 |
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35 _MARKER = object() |
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36 |
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37 |
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38 class _AttributeDict(ConfigurationBase): |
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39 |
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40 def __getattr__(self, name): |
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41 try: |
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42 v = self[name] |
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43 except KeyError: |
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44 raise AttributeError("%s has no attribute %r" % (type(self), name)) |
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45 else: |
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46 # Wrap a dict into another dict with attribute access support |
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47 if isinstance(v, dict): |
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48 return _AttributeDict(v) |
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49 else: |
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50 return v |
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51 |
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52 |
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53 class CoercingMethodsMixin(object): |
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54 |
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55 """Mixin to provide some common implementations for retrieval |
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56 methods that convert return values to a fixed type (int, bool, |
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57 float). |
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58 |
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59 Both :class:`~.Configuration` and :class:`~._JailedConfiguration` use |
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60 this mixin. |
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61 |
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62 """ |
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63 |
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64 def getintvarl_s(self, *path, **kwds): |
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65 """Get a (possibly substituted) variable and coerce text to a |
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66 number. |
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67 |
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68 """ |
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69 s = self.getvarl_s(*path, **kwds) |
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70 if isinstance(s, Configuration._TEXTTYPE): |
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71 return int(s, 0) |
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72 else: |
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73 return s |
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74 |
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75 def getfirstintvarl_s(self, *paths, **kwds): |
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76 """Get a (possibly substituted) variable and coerce text to a |
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77 number. |
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78 |
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79 """ |
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80 s = self.getfirstvarl_s(*paths, **kwds) |
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81 if isinstance(s, Configuration._TEXTTYPE): |
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82 return int(s, 0) |
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83 else: |
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84 return s |
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85 |
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86 def getintvar_s(self, varname, default=_MARKER): |
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87 """Get a (possibly substituted) variable and coerce text to a |
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88 number. |
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89 |
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90 """ |
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91 s = self.getvar_s(varname, default=default) |
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92 if isinstance(s, Configuration._TEXTTYPE): |
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93 return int(s, 0) |
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94 else: |
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95 return s |
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96 |
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97 def getfirstintvar_s(self, *varnames, **kwds): |
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98 """A variant of :meth:`~.getintvar_s` that returns the first found |
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99 variable in the list of given variables in `varnames`. |
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100 |
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101 """ |
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102 s = self.getfirstvar_s(*varnames, **kwds) |
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103 if isinstance(s, Configuration._TEXTTYPE): |
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104 return int(s, 0) |
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105 else: |
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106 return s |
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107 |
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108 def getboolvarl_s(self, *path, **kwds): |
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109 """Get a (possibly substituted) variable and convert text to a |
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110 boolean |
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111 |
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112 """ |
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113 s = self.getvarl_s(*path, **kwds) |
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114 if isinstance(s, Configuration._TEXTTYPE): |
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115 sl = s.strip().lower() |
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116 if sl not in self._BOOL_CVT: |
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117 raise ValueError("Not a boolean: %r" % s) |
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118 return self._BOOL_CVT[sl] |
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119 else: |
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120 return s |
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121 |
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122 def getfirstboolvarl_s(self, *paths, **kwds): |
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123 """Get a (possibly substituted) variable and convert text to a |
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124 boolean |
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125 |
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126 """ |
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127 s = self.getfirstvarl_s(*paths, **kwds) |
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128 if isinstance(s, Configuration._TEXTTYPE): |
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129 sl = s.strip().lower() |
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130 if sl not in self._BOOL_CVT: |
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131 raise ValueError("Not a boolean: %r" % s) |
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132 return self._BOOL_CVT[sl] |
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133 else: |
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134 return s |
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135 |
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136 def getboolvar_s(self, varname, default=_MARKER): |
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137 """Get a (possibly substituted) variable and convert text to a |
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138 boolean |
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139 |
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140 """ |
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141 s = self.getvar_s(varname, default=default) |
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142 if isinstance(s, Configuration._TEXTTYPE): |
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143 sl = s.strip().lower() |
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144 if sl not in self._BOOL_CVT: |
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145 raise ValueError("Not a boolean: %r" % s) |
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146 return self._BOOL_CVT[sl] |
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147 else: |
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148 return s |
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149 |
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150 def getfirstboolvar_s(self, *varnames, **kwds): |
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151 """A variant of :meth:`~.getboolvar_s` that returns the first found |
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152 variable in the list of given variables in `varnames`. |
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153 |
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154 """ |
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155 s = self.getfirstvar_s(*varnames, **kwds) |
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156 if isinstance(s, Configuration._TEXTTYPE): |
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157 sl = s.strip().lower() |
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158 if sl not in self._BOOL_CVT: |
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159 raise ValueError("Not a boolean: %r" % s) |
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160 return self._BOOL_CVT[sl] |
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161 else: |
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162 return s |
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163 |
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164 # Conversion of booleans |
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165 _BOOL_CVT = { |
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166 u('1'): True, u('yes'): True, u('true'): True, u('on'): True, |
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167 u('0'): False, u('no'): False, u('false'): False, u('off'): False |
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168 } |
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169 |
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170 def getfloatvarl_s(self, *path, **kwds): |
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171 """Get a (possibly substituted) variable and convert text to a |
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172 float |
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173 |
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174 """ |
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175 s = self.getvarl_s(*path, **kwds) |
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176 if isinstance(s, Configuration._TEXTTYPE): |
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177 return float(s) |
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178 else: |
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179 return s |
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180 |
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181 def getfirstfloatvarl_s(self, *path, **kwds): |
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182 """Get a (possibly substituted) variable and convert text to a |
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183 float |
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184 |
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185 """ |
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186 s = self.getfirstvarl_s(*path, **kwds) |
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187 if isinstance(s, Configuration._TEXTTYPE): |
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188 return float(s) |
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189 else: |
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190 return s |
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191 |
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192 def getfloatvar_s(self, varname, default=_MARKER): |
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193 """Get a (possibly substituted) variable and convert text to a |
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194 float |
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195 |
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196 """ |
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197 s = self.getvar_s(varname, default) |
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198 if isinstance(s, Configuration._TEXTTYPE): |
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199 return float(s) |
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200 else: |
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201 return s |
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202 |
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203 def getfirstfloatvar_s(self, varname, default=_MARKER): |
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204 """Get a (possibly substituted) variable and convert text to a |
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205 float |
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206 |
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207 """ |
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208 s = self.getfirstvar_s(varname, default) |
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209 if isinstance(s, Configuration._TEXTTYPE): |
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210 return float(s) |
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211 else: |
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212 return s |
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213 |
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214 |
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215 class Configuration(CoercingMethodsMixin, _AttributeDict): |
|
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216 |
| 18 | 217 """The configuration dictionary with attribute support or |
| 218 variable substitution. | |
| 219 | |
| 322 | 220 .. note:: When retrieving by attribute names variables will *not* |
| 18 | 221 substituted. |
| 222 | |
| 223 """ | |
| 224 | |
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225 # Speed |
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226 _TEXTTYPE = type(u("")) |
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227 _STARTTOK = u(b"{{") |
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228 _ENDTOK = u(b"}}") |
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229 _HIER_SEPARATOR = u(b'.') |
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230 _NS_SEPARATOR = u(b':') |
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231 _FILTER_SEPARATOR = u(b'|') |
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232 _STARTTOK_REF = _STARTTOK + REF_NAMESPACE + _NS_SEPARATOR |
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233 _ENDTOK_REF = _ENDTOK |
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234 _DOT = u(b'.') |
|
320
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235 _QUOTE = u(b'%') |
|
325
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236 _COMMENT = u(b'#') |
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237 |
|
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238 is_jail = False |
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239 """Flag to show that this is not a jail for another configuration""" |
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240 |
|
382
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241 def getvarl(self, *path, **kwds): |
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242 """Get a variable where the hierarchy is given in `path` as sequence |
|
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243 and the namespace is given in the `namespace` keyword argument. |
|
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244 |
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245 No variable interpolation is done and no filters are applied. |
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246 |
|
382
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247 Quoting of `path` and `namespace` is *not* needed and wrong. |
| 333 | 248 |
|
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249 """ |
|
321
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250 default = kwds.pop("default", _MARKER) |
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251 namespace = kwds.pop("namespace", None) |
|
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252 try: |
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253 if not namespace: |
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254 lookupfn = self._lookupvar |
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255 else: |
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256 if namespace == REF_NAMESPACE: |
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257 lookupfn = self._lookupref |
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258 else: |
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259 lookupfn = lookup_varns(namespace) |
|
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260 varvalue = lookupfn(*path) |
|
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261 except KeyError: |
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262 if default is _MARKER: |
|
382
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263 raise KeyError("Variable %r not found" % (path,)) |
|
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264 else: |
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265 return default |
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266 else: |
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267 return varvalue |
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268 |
|
418
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269 def getkeysl(self, *path, **kwds): |
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270 """Yield the keys of a variable value. |
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271 |
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272 :rtype: A generator |
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273 :raise KeyError: |
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274 |
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275 .. note:: Dictionary keys are not subject to interpolation. |
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276 |
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277 """ |
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278 if "default" in kwds: |
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279 raise TypeError("got unexpected keyword argument: default") |
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280 for k in self.getvarl(*path, **kwds).keys(): |
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281 yield k |
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282 |
|
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283 def getfirstvarl(self, *paths, **kwds): |
|
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284 """A variant of :meth:`~.getvarl` that returns the first found |
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285 variable in the `paths` list. |
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286 |
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287 Every item in `paths` is either a `tuple` or `list` or a `dict`. |
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288 If the path item is a `dict` then it must have two keys "namespace" |
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289 and "path". |
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290 If the path item is a `list` or `tuple` then the namespace is assumed |
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291 to be `None`. |
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292 |
| 389 | 293 Note that a caller that wants to use variables from a non-default |
| 294 namespace must use a sequence of dicts. | |
| 295 | |
|
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296 No variable interpolation is done and no filters are applied. |
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297 |
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298 Quoting of anything in `paths` is *not* needed and wrong. |
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299 |
|
395
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300 """ |
|
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301 default = kwds.pop("default", _MARKER) |
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302 for path in paths: |
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303 if isinstance(path, (list, tuple)): |
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304 try: |
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305 varvalue = self.getvarl(*path) |
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306 except KeyError: |
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307 pass |
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308 else: |
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309 return varvalue |
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310 elif isinstance(path, dict): |
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311 try: |
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312 namespace = path["namespace"] |
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313 p = path["path"] |
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314 except KeyError: |
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315 raise TypeError("a paths dict item must have a `path'" |
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316 " and a `namespace' key") |
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317 else: |
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318 try: |
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319 varvalue = self.getvarl(*p, namespace=namespace) |
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320 except KeyError: |
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321 pass |
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322 else: |
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323 return varvalue |
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324 else: |
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325 raise TypeError("a paths item must be a dict, list or tuple") |
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326 if default is _MARKER: |
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327 raise KeyError( |
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328 "none of the given variables found: %r" % (paths,)) |
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329 else: |
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330 return default |
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331 |
|
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332 def getvar(self, varname, default=_MARKER): |
|
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333 """Get a variable of the form ``[ns:][[key1.]key2.]name`` - including |
|
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334 variables from other namespaces. |
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335 |
|
202
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336 No variable interpolation is done and no filters are applied. |
|
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337 |
| 333 | 338 Special characters (e.g. ``:`` and ``.``) must be quoted when using |
| 339 the default namespace. | |
| 340 | |
| 341 See also :meth:`~.quote`. | |
| 342 | |
|
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343 """ |
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344 varns, varname = self._split_ns(varname) |
|
314
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345 if not varns: |
|
419
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346 if varname: |
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347 varnameparts = [ |
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348 self.unquote(vp) |
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349 for vp in varname.split(self._HIER_SEPARATOR) |
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350 ] |
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351 else: |
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352 varnameparts = tuple() |
|
314
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353 else: |
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354 varnameparts = (varname,) |
|
364
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355 return self.getvarl(*varnameparts, namespace=varns, default=default) |
|
314
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356 |
|
418
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357 def getkeys(self, varname): |
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358 """Yield all the keys of a variable value. |
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359 |
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360 :rtype: A generator |
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361 :raise KeyError: |
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362 |
|
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363 .. note:: Dictionary keys are not subject to interpolation. |
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364 |
|
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365 """ |
|
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366 for k in self.getvar(varname).keys(): |
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367 yield k |
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|
368 |
|
368
4ee53f6fcac1
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369 def getfirstvar(self, *varnames, **kwds): |
|
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370 """A variant of :meth:`~.getvar` that returns the first found variable |
|
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371 in the list of given variables in `varnames`. |
|
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372 |
|
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373 """ |
|
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374 default = kwds.pop("default", _MARKER) |
|
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Implement ".getfirstvar()" and ".getfirstvar_s()".
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375 for varname in varnames: |
|
4ee53f6fcac1
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|
376 try: |
|
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Implement ".getfirstvar()" and ".getfirstvar_s()".
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|
377 varvalue = self.getvar(varname) |
|
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Implement ".getfirstvar()" and ".getfirstvar_s()".
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378 except KeyError: |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
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diff
changeset
|
379 pass |
|
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Implement ".getfirstvar()" and ".getfirstvar_s()".
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diff
changeset
|
380 else: |
|
4ee53f6fcac1
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381 return varvalue |
|
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|
382 if default is _MARKER: |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
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|
383 raise KeyError( |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
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364
diff
changeset
|
384 "none of the given variables found: %r" % (varnames,)) |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
385 else: |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
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364
diff
changeset
|
386 return default |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
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364
diff
changeset
|
387 |
|
382
24db29162d09
Renamed "names" arguments into the more proper "path"
Franz Glasner <fzglas.hg@dom66.de>
parents:
381
diff
changeset
|
388 def getvarl_s(self, *path, **kwds): |
|
314
043a6412be3c
Implemented new access methods .getvarl() and .getvarl_s
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311
diff
changeset
|
389 """Get a variable - including variables from other namespaces. |
|
043a6412be3c
Implemented new access methods .getvarl() and .getvarl_s
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diff
changeset
|
390 |
|
382
24db29162d09
Renamed "names" arguments into the more proper "path"
Franz Glasner <fzglas.hg@dom66.de>
parents:
381
diff
changeset
|
391 `path` and `namespace` are interpreted as in |
|
314
043a6412be3c
Implemented new access methods .getvarl() and .getvarl_s
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311
diff
changeset
|
392 :meth:`.getvarl`. But variables will be interpolated |
|
043a6412be3c
Implemented new access methods .getvarl() and .getvarl_s
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diff
changeset
|
393 recursively within the variable values and filters are |
|
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diff
changeset
|
394 applied. |
|
043a6412be3c
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diff
changeset
|
395 |
|
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Implemented new access methods .getvarl() and .getvarl_s
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|
396 For more details see chapter :ref:`variable-interpolation`. |
|
043a6412be3c
Implemented new access methods .getvarl() and .getvarl_s
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diff
changeset
|
397 |
|
043a6412be3c
Implemented new access methods .getvarl() and .getvarl_s
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311
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|
398 """ |
|
321
7a0f3c256cf4
FIX: Python2 compatibility: keyword arguments after *args not allowed: use **kwds and manual retrieval with .pop() instead
Franz Glasner <f.glasner@feldmann-mg.com>
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320
diff
changeset
|
399 default = kwds.pop("default", _MARKER) |
|
7a0f3c256cf4
FIX: Python2 compatibility: keyword arguments after *args not allowed: use **kwds and manual retrieval with .pop() instead
Franz Glasner <f.glasner@feldmann-mg.com>
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320
diff
changeset
|
400 namespace = kwds.pop("namespace", None) |
|
16
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
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parents:
diff
changeset
|
401 try: |
|
382
24db29162d09
Renamed "names" arguments into the more proper "path"
Franz Glasner <fzglas.hg@dom66.de>
parents:
381
diff
changeset
|
402 obj = self.getvarl(*path, namespace=namespace) |
|
314
043a6412be3c
Implemented new access methods .getvarl() and .getvarl_s
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311
diff
changeset
|
403 return self.substitute_variables_in_obj(obj) |
|
16
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
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parents:
diff
changeset
|
404 except KeyError: |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
405 if default is _MARKER: |
|
314
043a6412be3c
Implemented new access methods .getvarl() and .getvarl_s
Franz Glasner <fzglas.hg@dom66.de>
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311
diff
changeset
|
406 raise |
|
16
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
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changeset
|
407 else: |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
408 return default |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
409 |
|
381
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
410 def getfirstvarl_s(self, *paths, **kwds): |
|
388
13427f37abab
Docs: document Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
385
diff
changeset
|
411 """A variant of :meth:`~.getfirstvarl` that does variable |
|
13427f37abab
Docs: document Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
385
diff
changeset
|
412 interpolation. |
|
13427f37abab
Docs: document Configuration.getfirstvarl_s()
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385
diff
changeset
|
413 |
|
13427f37abab
Docs: document Configuration.getfirstvarl_s()
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385
diff
changeset
|
414 `paths` and `kwds` are interpreted as in :meth:`.getfirstvarl`. |
|
13427f37abab
Docs: document Configuration.getfirstvarl_s()
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385
diff
changeset
|
415 But variables will be interpolated |
|
13427f37abab
Docs: document Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
385
diff
changeset
|
416 recursively within the variable values and filters are |
|
13427f37abab
Docs: document Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
385
diff
changeset
|
417 applied. |
|
13427f37abab
Docs: document Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
385
diff
changeset
|
418 |
|
13427f37abab
Docs: document Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
385
diff
changeset
|
419 For more details see chapter :ref:`variable-interpolation`. |
|
13427f37abab
Docs: document Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
385
diff
changeset
|
420 |
|
13427f37abab
Docs: document Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
385
diff
changeset
|
421 """ |
|
381
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
422 default = kwds.pop("default", _MARKER) |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
423 for path in paths: |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
424 if isinstance(path, (list, tuple)): |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
425 try: |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
426 obj = self.getvarl(*path) |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
427 except KeyError: |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
428 pass |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
429 else: |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
430 return self.substitute_variables_in_obj(obj) |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
431 |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
432 elif isinstance(path, dict): |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
433 try: |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
434 namespace = path["namespace"] |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
435 p = path["path"] |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
436 except KeyError: |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
437 raise TypeError("a paths dict item must have a `path'" |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
438 " and a `namespace' key") |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
439 else: |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
440 try: |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
441 obj = self.getvarl(*p, namespace=namespace) |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
442 except KeyError: |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
443 pass |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
444 else: |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
445 return self.substitute_variables_in_obj(obj) |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
446 else: |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
447 raise TypeError("a paths item must be a dict, list or tuple") |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
448 if default is _MARKER: |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
449 raise KeyError( |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
450 "none of the given variables found: %r" % (paths,)) |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
451 else: |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
452 return default |
|
fe3dfd687621
Implemented Configuration.getfirstvarl() and Configuration.getfirstvarl_s()
Franz Glasner <fzglas.hg@dom66.de>
parents:
380
diff
changeset
|
453 |
|
16
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
454 def getvar_s(self, varname, default=_MARKER): |
|
24
fa65adab0b71
FIX: Typo in comment
Franz Glasner <f.glasner@feldmann-mg.com>
parents:
23
diff
changeset
|
455 """Get a variable - including variables from other namespaces. |
|
16
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
456 |
|
115
a5339d39af5c
Begin the documentation of variables and its expansion
Franz Glasner <hg@dom66.de>
parents:
104
diff
changeset
|
457 `varname` is interpreted as in :meth:`.getvar`. But variables |
|
202
2e66178a09d8
Docu: Ban "keyword expansion" -- use "variable interpolation" instead
Franz Glasner <fzglas.hg@dom66.de>
parents:
156
diff
changeset
|
458 will be interpolated recursively within the variable values |
|
2e66178a09d8
Docu: Ban "keyword expansion" -- use "variable interpolation" instead
Franz Glasner <fzglas.hg@dom66.de>
parents:
156
diff
changeset
|
459 and filters are applied. |
|
115
a5339d39af5c
Begin the documentation of variables and its expansion
Franz Glasner <hg@dom66.de>
parents:
104
diff
changeset
|
460 |
|
202
2e66178a09d8
Docu: Ban "keyword expansion" -- use "variable interpolation" instead
Franz Glasner <fzglas.hg@dom66.de>
parents:
156
diff
changeset
|
461 For more details see chapter :ref:`variable-interpolation`. |
|
115
a5339d39af5c
Begin the documentation of variables and its expansion
Franz Glasner <hg@dom66.de>
parents:
104
diff
changeset
|
462 |
|
16
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
463 """ |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
464 try: |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
465 obj = self.getvar(varname) |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
466 return self.substitute_variables_in_obj(obj) |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
467 except KeyError: |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
468 if default is _MARKER: |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
469 raise |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
470 else: |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
471 return default |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
472 |
|
368
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
473 def getfirstvar_s(self, *varnames, **kwds): |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
474 """A variant of :meth:`~.getvar_s` that returns the first found |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
475 variable in the list of given variables in `varnames`. |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
476 |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
477 """ |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
478 default = kwds.pop("default", _MARKER) |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
479 for varname in varnames: |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
480 try: |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
481 obj = self.getvar(varname) |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
482 except KeyError: |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
483 pass |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
484 else: |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
485 return self.substitute_variables_in_obj(obj) |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
486 if default is _MARKER: |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
487 raise KeyError( |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
488 "none of the given variables found: %r" % (varnames,)) |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
489 else: |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
490 return default |
|
4ee53f6fcac1
Implement ".getfirstvar()" and ".getfirstvar_s()".
Franz Glasner <fzglas.hg@dom66.de>
parents:
364
diff
changeset
|
491 |
|
16
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
492 def _split_ns(self, s): |
|
305
f529ca46dd50
Implemented the "ref" namespace to get configuration tree references.
Franz Glasner <fzglas.hg@dom66.de>
parents:
304
diff
changeset
|
493 nameparts = s.split(self._NS_SEPARATOR, 1) |
|
16
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
494 if len(nameparts) == 1: |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
495 return (None, s, ) |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
496 else: |
|
329
d81d2cdf4925
FIX: Handle the unquoting of namespaces within Configuration.getvar() properly.
Franz Glasner <fzglas.hg@dom66.de>
parents:
326
diff
changeset
|
497 return (self.unquote(nameparts[0]), nameparts[1], ) |
|
16
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
498 |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
499 def _split_filters(self, s): |
|
305
f529ca46dd50
Implemented the "ref" namespace to get configuration tree references.
Franz Glasner <fzglas.hg@dom66.de>
parents:
304
diff
changeset
|
500 nameparts = s.split(self._FILTER_SEPARATOR) |
|
16
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
501 if len(nameparts) == 1: |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
502 return (s, [], ) |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
503 else: |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
504 return (nameparts[0].rstrip(), nameparts[1:], ) |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
505 |
|
382
24db29162d09
Renamed "names" arguments into the more proper "path"
Franz Glasner <fzglas.hg@dom66.de>
parents:
381
diff
changeset
|
506 def _lookupvar(self, *path, **kwds): |
|
314
043a6412be3c
Implemented new access methods .getvarl() and .getvarl_s
Franz Glasner <fzglas.hg@dom66.de>
parents:
311
diff
changeset
|
507 """Lookup a variable within a hierarchy. |
|
16
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
508 |
|
382
24db29162d09
Renamed "names" arguments into the more proper "path"
Franz Glasner <fzglas.hg@dom66.de>
parents:
381
diff
changeset
|
509 If no default is given an unexisting `path` raises a `KeyError` |
|
16
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
510 else `default` is returned. |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
511 """ |
|
321
7a0f3c256cf4
FIX: Python2 compatibility: keyword arguments after *args not allowed: use **kwds and manual retrieval with .pop() instead
Franz Glasner <f.glasner@feldmann-mg.com>
parents:
320
diff
changeset
|
512 default = kwds.pop("default", _MARKER) |
|
419
079a82129110
Allow the empty variable name to retrieve the root configuration object
Franz Glasner <fzglas.hg@dom66.de>
parents:
418
diff
changeset
|
513 if not path: |
|
079a82129110
Allow the empty variable name to retrieve the root configuration object
Franz Glasner <fzglas.hg@dom66.de>
parents:
418
diff
changeset
|
514 return self |
|
16
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
515 try: |
|
382
24db29162d09
Renamed "names" arguments into the more proper "path"
Franz Glasner <fzglas.hg@dom66.de>
parents:
381
diff
changeset
|
516 v = self.expand_if_reference(self[path[0]]) |
|
24db29162d09
Renamed "names" arguments into the more proper "path"
Franz Glasner <fzglas.hg@dom66.de>
parents:
381
diff
changeset
|
517 for p in path[1:]: |
|
305
f529ca46dd50
Implemented the "ref" namespace to get configuration tree references.
Franz Glasner <fzglas.hg@dom66.de>
parents:
304
diff
changeset
|
518 v = self.expand_if_reference(v[p]) |
|
104
d9f9a06e0c49
Make a better error message for "TypeError" exceptions when looking up variables.
Franz Glasner <f.glasner@feldmann-mg.com>
parents:
82
diff
changeset
|
519 except TypeError: |
|
207
b3b5ed34d180
Handle most flake8 errors and warnings.
Franz Glasner <fzglas.hg@dom66.de>
parents:
202
diff
changeset
|
520 raise KeyError( |
|
b3b5ed34d180
Handle most flake8 errors and warnings.
Franz Glasner <fzglas.hg@dom66.de>
parents:
202
diff
changeset
|
521 "Configuration variable %r not found" |
|
382
24db29162d09
Renamed "names" arguments into the more proper "path"
Franz Glasner <fzglas.hg@dom66.de>
parents:
381
diff
changeset
|
522 "(missing intermediate keys?)" % (path,)) |
|
16
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
523 except KeyError: |
|
f85dc4677c01
Implemented the real configuration dictionary with attribute access or
Franz Glasner <hg@dom66.de>
parents:
diff
changeset
|
524 if default is _MARKER: |
|
314
043a6412be3c
Implemented new access methods .getvarl() and .getvarl_s
Franz Glasner <fzglas.hg@dom66.de>
parents:
311
diff
changeset
|
525 raise KeyError( |
|
382
24db29162d09
Renamed "names" arguments into the more proper "path"
Franz Glasner <fzglas.hg@dom66.de>
parents:
381
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526 "Configuration variable %r not found" % (path,)) |
|
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527 else: |
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528 return default |
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529 return v |
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530 |
|
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531 def _lookupref(self, key, default=_MARKER): |
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532 """ |
| 311 | 533 |
| 534 `key` must be a configuration reference URI without any | |
| 535 (namespace) prefixes and suffixes | |
|
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536 |
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537 """ |
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538 return self.expand_ref_uri(key, default=default) |
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539 |
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540 def expand_if_reference(self, v, default=_MARKER): |
| 311 | 541 """Check whether `v` is a configuration reference and -- if true -- |
| 542 then expand it. | |
|
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543 |
| 310 | 544 `v` must match the pattern ``{{ref:<REFERENCE>}}`` |
|
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545 |
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546 All non-matching texttypes and all non-texttypes are returned |
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547 unchanged. |
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|
548 |
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549 """ |
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550 if not isinstance(v, self._TEXTTYPE): |
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551 return v |
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552 if not v.startswith(self._STARTTOK_REF) \ |
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553 or not v.endswith(self._ENDTOK_REF): |
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554 return v |
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555 return self.expand_ref_uri( |
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556 v[len(self._STARTTOK_REF):-len(self._ENDTOK_REF)], |
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557 default=default) |
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558 |
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559 def expand_ref_uri(self, uri, default=_MARKER): |
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560 pu = urlsplit(uri) |
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561 if pu.scheme or pu.netloc or pu.path or pu.query: |
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562 raise ValueError("only fragment-only URIs are supported") |
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563 if not pu.fragment: |
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564 return self |
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565 if pu.fragment.startswith(self._DOT): |
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566 raise ValueError("relative refs not supported") |
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567 return self.getvar(pu.fragment, default=default) |
|
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568 |
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569 def substitute_variables_in_obj(self, obj): |
|
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570 """Recursively expand variables in the object tree `obj`.""" |
|
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571 if isinstance(obj, self._TEXTTYPE): |
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572 # a string - really replace the value |
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573 return self.expand_variable(obj) |
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574 elif isinstance(obj, list): |
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575 return [self.substitute_variables_in_obj(i) for i in obj] |
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576 elif isinstance(obj, tuple): |
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577 tmp = [self.substitute_variables_in_obj(i) for i in obj] |
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578 return type(obj)(tmp) |
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579 elif isinstance(obj, dict): |
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580 newdict = type(obj)() |
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581 for k in obj: |
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582 newdict[k] = self.substitute_variables_in_obj(obj[k]) |
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583 return newdict |
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584 elif isinstance(obj, set): |
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585 newset = type(obj)() |
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586 for i in obj: |
|
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587 newset.add(self.substitute_variables_in_obj(i)) |
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588 else: |
|
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589 return obj |
|
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|
590 |
|
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|
591 def expand_variable(self, s): |
| 302 | 592 """Expand variables in the single string `s`""" |
|
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593 start = s.find(self._STARTTOK, 0) |
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594 while start != -1: |
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595 end = s.find(self._ENDTOK, start) |
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|
596 if end < 0: |
|
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597 return s |
|
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|
598 varname, filters = self._split_filters(s[start+2:end]) |
|
39
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|
599 try: |
|
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|
600 if NONE_FILTER in filters: |
|
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|
601 varvalue = self._apply_filters( |
|
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|
602 filters, self.getvar_s(varname, default=None)) |
|
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|
603 elif EMPTY_FILTER in filters: |
|
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604 varvalue = self._apply_filters( |
|
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|
605 filters, self.getvar_s(varname, default=u(""))) |
|
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606 else: |
|
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|
607 varvalue = self._apply_filters( |
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608 filters, self.getvar_s(varname)) |
|
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|
609 except KeyError: |
|
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|
610 warnings.warn("Cannot expand variable %r in string " |
|
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|
611 "%r" % (varname, s, ), |
|
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|
612 UserWarning, |
|
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613 stacklevel=1) |
|
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614 raise |
|
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615 # |
|
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616 # Dont apply and type conversions to the variable value if |
|
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617 # the whole `s` is just one expansion |
|
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618 # |
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619 if (start == 0) and (end + 2 == len(s)): |
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620 return varvalue |
|
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621 if varvalue is None: |
|
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|
622 varvalue = u("") |
|
249
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|
623 replaced = s[:start] + u(str(varvalue)) |
|
248
13283057a21e
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|
624 s = replaced + s[end+2:] |
|
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|
625 # don't re-evaluate because `self.getvar_s()` expands already |
|
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|
626 start = s.find(self._STARTTOK, len(replaced)) |
|
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|
627 return s |
|
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|
628 |
|
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|
629 def _apply_filters(self, filters, value): |
|
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|
630 for name in filters: |
|
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|
631 try: |
|
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changeset
|
632 filterfn = lookup_filter(name) |
|
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|
633 except KeyError: |
|
40
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diff
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|
634 # |
|
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diff
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|
635 # Convert to NameError because we find a missing filters |
|
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|
636 # a very serious error. |
|
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diff
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|
637 # |
|
16
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|
638 raise NameError("Filter %r not found" % name) |
|
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|
639 else: |
|
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|
640 value = filterfn(self, value) |
|
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diff
changeset
|
641 return value |
|
320
98490375d90c
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314
diff
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|
642 |
|
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|
643 @classmethod |
|
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644 def quote(klass, s): |
| 333 | 645 """Replace important special characters in string `s` by replacing |
| 646 them with ``%xNN`` where `NN` are the two hexadecimal digits of the | |
| 647 characters unicode codepoint value. | |
| 648 | |
| 649 Handled are the important special chars: ``%``, ``.``, ``:``, | |
|
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650 ``#``; ``'``, ``"``, ``|``, ``{``, ``}``, ``[`` and ``]``. |
| 333 | 651 |
| 652 See also the :ref:`quoting` section. | |
|
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653 |
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654 """ |
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655 qc = klass._QUOTE |
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656 s = s.replace(qc, qc + "x25") |
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657 s = s.replace(klass._DOT, qc + "x2e") |
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658 s = s.replace(klass._NS_SEPARATOR, qc + "x3a") |
|
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659 s = s.replace(klass._COMMENT, qc + "x23") |
|
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660 s = s.replace(klass._FILTER_SEPARATOR, qc + "x7c") |
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661 s = s.replace('"', qc + "x22") |
|
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662 s = s.replace("'", qc + "x27") |
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663 s = s.replace('{', qc + "x7b") |
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664 s = s.replace('}', qc + "x7d") |
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665 s = s.replace('[', qc + "x5b") |
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666 return s.replace(']', qc + "x5d") |
|
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667 |
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668 @classmethod |
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669 def unquote(klass, s): |
| 333 | 670 """Unquote the content of `s`: handle all patterns ``%xNN``, |
| 671 ``%uNNNN`` or ``%UNNNNNNNN``. | |
| 672 | |
| 673 This is the inverse of :meth:`~.quote`. | |
|
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674 |
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675 """ |
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676 if klass._QUOTE not in s: |
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677 return s |
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678 res = [] |
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679 parts = s.split(klass._QUOTE) |
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680 res.append(parts[0]) |
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681 for p in parts[1:]: |
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682 if p.startswith(u(b'x')): |
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683 if len(p) < 3: |
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684 raise ValueError("quote syntax: length too small") |
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685 res.append(uchr(int(p[1:3], 16))) |
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686 res.append(p[3:]) |
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687 elif p.startswith(u(b'u')): |
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688 if len(p) < 5: |
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689 raise ValueError("quote syntax: length too small") |
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690 res.append(uchr(int(p[1:5], 16))) |
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691 res.append(p[5:]) |
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692 elif p.startswith(u(b'U')): |
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693 if len(p) < 9: |
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694 raise ValueError("quote syntax: length too small") |
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695 res.append(uchr(int(p[1:9], 16))) |
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696 res.append(p[9:]) |
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697 else: |
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698 raise ValueError("unknown quote syntax string: {}".format(s)) |
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699 return ''.join(res) |
|
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700 |
|
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701 def jailed(self, rootpath=None, root=None, bind_root=True): |
| 399 | 702 """Return a "jailed" configuration of the current configuration. |
|
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703 |
| 399 | 704 :param rootpath: a sequence of strings that shall emcompass |
| 705 the chroot-like jail of the returned | |
| 706 configuration | |
| 707 :type rootpath: list or tuple | |
| 708 :param str root: a string path expression that shall encompass | |
| 709 the chroot-like jail of the returned configuration | |
|
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710 :param bool bind_root: if you do a :meth:`~.rebind` just after |
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711 creation of a jailed config you can set |
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712 `bind_root` to `False`; otherwise use |
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713 the default |
| 397 | 714 :return: a jailed (aka restricted) configuration |
| 715 :rtype: _JailedConfiguration | |
| 716 | |
| 399 | 717 Exactly one of `rootpath` or `root` must be given. |
| 718 | |
|
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719 """ |
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720 if rootpath is not None and root is not None: |
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721 raise ValueError("only one of `rootpath' or `root' can be given") |
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722 if rootpath is None and root is None: |
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723 raise ValueError("one of `rootpath' or `root' must be given") |
|
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724 if rootpath is not None and not isinstance(rootpath, (list, tuple)): |
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725 raise TypeError("`rootpath' must be a list or a tuple") |
|
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726 if root is not None: |
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727 # convert to path |
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728 varns, varname = self._split_ns(root) |
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729 if varns: |
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730 raise ValueError( |
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731 "jailed configurations do not support namespaces") |
|
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732 if varname: |
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733 rootpath = [ |
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734 self.unquote(p) for p in root.split( |
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735 self._HIER_SEPARATOR) |
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736 ] |
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737 else: |
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738 rootpath = tuple() |
|
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739 jc = _JailedConfiguration(*rootpath) |
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740 if bind_root: |
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741 jc.rebind(self) |
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742 return jc |
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743 |
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744 |
|
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745 class _JailedConfiguration(CoercingMethodsMixin): |
|
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746 |
| 397 | 747 """A jailed and restricted variant of :class:`Configuration`. |
| 748 | |
| 399 | 749 Restriction is two-fold: |
| 750 | |
| 751 - The access to configuration variables in `config` is restricted | |
| 752 to the configuration sub-tree that is configured in `path`. | |
| 753 | |
| 754 - Not all access-methods of :class:`Configuration` are implemented | |
| 755 yet. | |
| 756 | |
| 400 | 757 .. seealso:: :ref:`jailed-configuration` |
| 758 | |
| 399 | 759 .. note:: There is no namespace support. |
| 760 | |
| 761 .. note:: Do not call the constructor directly. Instantiate a jailed | |
| 762 configuration from the parent configuration's | |
| 763 :meth:`~.Configuration.jailed` factory method. | |
| 397 | 764 |
| 765 """ | |
|
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766 |
| 396 | 767 __slots__ = ("_base", "_path", "_pathstr") |
|
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768 |
|
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769 is_jail = True |
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770 """Flag to show that this is a jail for another configuration""" |
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771 |
|
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772 def __init__(self, *path): |
|
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773 super(_JailedConfiguration, self).__init__() |
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774 self._path = path |
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775 if path: |
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776 self._pathstr = \ |
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777 Configuration._HIER_SEPARATOR.join( |
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778 [Configuration.quote(p) for p in path]) \ |
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779 + Configuration._HIER_SEPARATOR |
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780 else: |
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781 self._pathstr = '' |
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782 |
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783 @property |
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784 def base(self): |
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785 """Ask for the base (aka parent) configuration". |
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786 |
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787 This configuration is always unjailed. |
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788 |
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789 """ |
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790 return self._base |
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791 |
|
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792 def rebind(self, new_base): |
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793 """Bind the jail to a new unjailed configuration `new_base`. |
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794 |
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795 The new configuration base also must have an existing path to |
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796 the root. |
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797 |
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798 :param Configuration new_base: the new base |
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799 |
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800 """ |
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801 if new_base.is_jail: |
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802 raise TypeError("can only bind to an unjailed configuration") |
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803 self._base = new_base |
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804 # |
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805 # Early error out if the chroot does not exist but allow |
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806 # degenerated case if `self._path` is empty. |
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807 # |
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808 if self._path: |
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809 new_base.getvarl(*self._path) |
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810 |
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811 def getvarl(self, *path, **kwds): |
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812 return self._base.getvarl(*(self._path + path), **kwds) |
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813 |
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814 def getkeysl(self, *path, **kwds): |
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815 for k in self._base.getkeysl(*(self._path + path), **kwds): |
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816 yield k |
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817 |
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818 def getfirstvarl(self, *paths, **kwds): |
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819 real_paths = [] |
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820 for path in paths: |
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821 if isinstance(path, (list, tuple)): |
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822 real_paths.append(self._path + path) |
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823 elif isinstance(path, dict): |
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824 raise TypeError( |
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825 "a `dict' is not supported in a jailed configuration") |
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826 else: |
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827 raise TypeError("a paths item must be a list or tuple") |
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828 return self._base.getfirstvarl(*real_paths, **kwds) |
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829 |
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830 def getvarl_s(self, *path, **kwds): |
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831 return self._base.getvarl_s(*(self._path + path), **kwds) |
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832 |
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833 def getfirstvarl_s(self, *paths, **kwds): |
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834 real_paths = [] |
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835 for path in paths: |
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836 if isinstance(path, (list, tuple)): |
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837 real_paths.append(self._path + path) |
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838 elif isinstance(path, dict): |
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839 raise TypeError( |
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840 "a `dict' is not supported in a jailed configuration") |
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841 else: |
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842 raise TypeError("a paths item must be a list or tuple") |
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843 return self._base.getfirstvarl_s(*real_paths, **kwds) |
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844 |
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845 def getvar(self, varname, **kwds): |
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846 return self._base.getvar(self._pathstr + varname, **kwds) |
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847 |
|
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848 def getkeys(self, varname): |
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849 for k in self._base.getkeys(self._pathstr + varname): |
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850 yield k |
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851 |
|
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852 def getfirstvar(self, *varnames, **kwds): |
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853 real_varnames = [self._pathstr + vn for vn in varnames] |
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854 return self._base.getfirstvar(*real_varnames, **kwds) |
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855 |
|
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856 def getvar_s(self, varname, **kwds): |
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857 return self._base.getvar_s(self._pathstr + varname, **kwds) |
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858 |
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859 def getfirstvar_s(self, *varnames, **kwds): |
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860 real_varnames = [self._pathstr + vn for vn in varnames] |
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861 return self._base.getfirstvar_s(*real_varnames, **kwds) |
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862 |
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863 def jailed(self, rootpath=None, root=None, bind_root=True): |
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864 """Return a "jailed" configuration that effectively is a |
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865 subjail of the current jail |
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866 |
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867 For a more complete description see :meth:`.Configuration.jailed`. |
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868 |
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869 """ |
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870 if rootpath is not None and root is not None: |
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871 raise ValueError("only one of `rootpath' or `root' can be given") |
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872 if rootpath is None and root is None: |
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873 raise ValueError("one of `rootpath' or `root' must be given") |
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874 if rootpath is not None and not isinstance(rootpath, (list, tuple)): |
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875 raise TypeError("`rootpath' must be a list or a tuple") |
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876 if root is not None: |
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877 # convert to path |
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878 varns, varname = self._base._split_ns(root) |
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879 if varns: |
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880 raise ValueError( |
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881 "sub-jails do not support namespaces") |
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882 if varname: |
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883 rootpath = [ |
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884 self._base.unquote(p) for p in varname.split( |
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885 self._base._HIER_SEPARATOR) |
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886 ] |
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887 else: |
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888 rootpath = tuple() |
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889 if self._path: |
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890 new_rootpath = self._path + tuple(rootpath) |
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891 else: |
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892 new_rootpath = rootpath |
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893 sjc = _JailedConfiguration(*new_rootpath) |
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894 if bind_root: |
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895 sjc.rebind(self._base) |
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896 return sjc |
