Mercurial > kallithea
annotate rhodecode/lib/vcs/backends/git/config.py @ 3805:a5c234e934c5 beta
synced with latest vcs
author | Marcin Kuzminski <marcin@python-works.com> |
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date | Thu, 02 May 2013 16:15:30 +0200 |
parents | 324ac367a4da |
children | f5a1314886ec |
rev | line source |
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2007
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1 # config.py - Reading and writing Git config files |
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2 # Copyright (C) 2011 Jelmer Vernooij <jelmer@samba.org> |
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3 # |
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4 # This program is free software; you can redistribute it and/or |
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5 # modify it under the terms of the GNU General Public License |
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6 # as published by the Free Software Foundation; version 2 |
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7 # of the License or (at your option) a later version. |
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8 # |
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9 # This program is distributed in the hope that it will be useful, |
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10 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 # GNU General Public License for more details. |
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13 # |
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14 # You should have received a copy of the GNU General Public License |
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15 # along with this program; if not, write to the Free Software |
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16 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
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17 # MA 02110-1301, USA. |
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18 |
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19 """Reading and writing Git configuration files. |
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20 |
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21 TODO: |
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22 * preserve formatting when updating configuration files |
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23 * treat subsection names as case-insensitive for [branch.foo] style |
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24 subsections |
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25 """ |
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26 |
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27 # Taken from dulwich not yet released 0.8.3 version (until it is actually |
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28 # released) |
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29 |
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30 import errno |
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31 import os |
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32 import re |
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33 |
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34 from dulwich.file import GitFile |
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35 |
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36 |
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37 class Config(object): |
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38 """A Git configuration.""" |
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39 |
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40 def get(self, section, name): |
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41 """Retrieve the contents of a configuration setting. |
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42 |
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43 :param section: Tuple with section name and optional subsection namee |
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44 :param subsection: Subsection name |
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45 :return: Contents of the setting |
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46 :raise KeyError: if the value is not set |
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47 """ |
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48 raise NotImplementedError(self.get) |
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49 |
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50 def get_boolean(self, section, name, default=None): |
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51 """Retrieve a configuration setting as boolean. |
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52 |
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53 :param section: Tuple with section name and optional subsection namee |
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54 :param name: Name of the setting, including section and possible |
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55 subsection. |
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56 :return: Contents of the setting |
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57 :raise KeyError: if the value is not set |
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58 """ |
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59 try: |
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60 value = self.get(section, name) |
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61 except KeyError: |
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62 return default |
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63 if value.lower() == "true": |
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64 return True |
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65 elif value.lower() == "false": |
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66 return False |
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67 raise ValueError("not a valid boolean string: %r" % value) |
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68 |
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69 def set(self, section, name, value): |
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70 """Set a configuration value. |
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71 |
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72 :param name: Name of the configuration value, including section |
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73 and optional subsection |
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74 :param: Value of the setting |
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75 """ |
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76 raise NotImplementedError(self.set) |
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77 |
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78 |
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79 class ConfigDict(Config): |
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80 """Git configuration stored in a dictionary.""" |
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81 |
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82 def __init__(self, values=None): |
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83 """Create a new ConfigDict.""" |
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84 if values is None: |
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85 values = {} |
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86 self._values = values |
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87 |
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88 def __repr__(self): |
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89 return "%s(%r)" % (self.__class__.__name__, self._values) |
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90 |
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91 def __eq__(self, other): |
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92 return ( |
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93 isinstance(other, self.__class__) and |
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94 other._values == self._values) |
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95 |
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96 @classmethod |
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97 def _parse_setting(cls, name): |
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98 parts = name.split(".") |
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99 if len(parts) == 3: |
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100 return (parts[0], parts[1], parts[2]) |
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101 else: |
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102 return (parts[0], None, parts[1]) |
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103 |
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104 def get(self, section, name): |
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105 if isinstance(section, basestring): |
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106 section = (section, ) |
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107 if len(section) > 1: |
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108 try: |
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109 return self._values[section][name] |
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110 except KeyError: |
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111 pass |
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112 return self._values[(section[0],)][name] |
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113 |
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114 def set(self, section, name, value): |
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115 if isinstance(section, basestring): |
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116 section = (section, ) |
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117 self._values.setdefault(section, {})[name] = value |
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118 |
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119 |
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120 def _format_string(value): |
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121 if (value.startswith(" ") or |
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122 value.startswith("\t") or |
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123 value.endswith(" ") or |
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124 value.endswith("\t")): |
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125 return '"%s"' % _escape_value(value) |
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126 return _escape_value(value) |
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127 |
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128 |
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129 def _parse_string(value): |
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130 value = value.strip() |
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131 ret = [] |
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132 block = [] |
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133 in_quotes = False |
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134 for c in value: |
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135 if c == "\"": |
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136 in_quotes = (not in_quotes) |
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137 ret.append(_unescape_value("".join(block))) |
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138 block = [] |
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139 elif c in ("#", ";") and not in_quotes: |
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140 # the rest of the line is a comment |
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141 break |
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142 else: |
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143 block.append(c) |
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144 |
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145 if in_quotes: |
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146 raise ValueError("value starts with quote but lacks end quote") |
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147 |
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148 ret.append(_unescape_value("".join(block)).rstrip()) |
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149 |
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150 return "".join(ret) |
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151 |
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152 |
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153 def _unescape_value(value): |
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154 """Unescape a value.""" |
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155 def unescape(c): |
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156 return { |
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157 "\\\\": "\\", |
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158 "\\\"": "\"", |
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159 "\\n": "\n", |
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160 "\\t": "\t", |
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161 "\\b": "\b", |
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162 }[c.group(0)] |
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163 return re.sub(r"(\\.)", unescape, value) |
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164 |
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165 |
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166 def _escape_value(value): |
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167 """Escape a value.""" |
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168 return value.replace("\\", "\\\\").replace("\n", "\\n")\ |
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169 .replace("\t", "\\t").replace("\"", "\\\"") |
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170 |
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171 |
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172 def _check_variable_name(name): |
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173 for c in name: |
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174 if not c.isalnum() and c != '-': |
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175 return False |
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176 return True |
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177 |
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178 |
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179 def _check_section_name(name): |
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180 for c in name: |
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181 if not c.isalnum() and c not in ('-', '.'): |
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182 return False |
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183 return True |
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184 |
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185 |
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186 def _strip_comments(line): |
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187 line = line.split("#")[0] |
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188 line = line.split(";")[0] |
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189 return line |
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190 |
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191 |
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192 class ConfigFile(ConfigDict): |
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193 """A Git configuration file, like .git/config or ~/.gitconfig. |
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194 """ |
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195 |
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196 @classmethod |
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197 def from_file(cls, f): |
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198 """Read configuration from a file-like object.""" |
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199 ret = cls() |
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200 section = None |
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201 setting = None |
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202 for lineno, line in enumerate(f.readlines()): |
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203 line = line.lstrip() |
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204 if setting is None: |
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205 if _strip_comments(line).strip() == "": |
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206 continue |
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207 if line[0] == "[": |
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208 line = _strip_comments(line).rstrip() |
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209 if line[-1] != "]": |
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210 raise ValueError("expected trailing ]") |
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211 key = line.strip() |
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212 pts = key[1:-1].split(" ", 1) |
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213 pts[0] = pts[0].lower() |
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214 if len(pts) == 2: |
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215 if pts[1][0] != "\"" or pts[1][-1] != "\"": |
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216 raise ValueError( |
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217 "Invalid subsection " + pts[1]) |
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218 else: |
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219 pts[1] = pts[1][1:-1] |
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220 if not _check_section_name(pts[0]): |
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221 raise ValueError("invalid section name %s" % |
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222 pts[0]) |
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223 section = (pts[0], pts[1]) |
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224 else: |
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225 if not _check_section_name(pts[0]): |
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226 raise ValueError("invalid section name %s" % |
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227 pts[0]) |
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228 pts = pts[0].split(".", 1) |
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229 if len(pts) == 2: |
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230 section = (pts[0], pts[1]) |
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231 else: |
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232 section = (pts[0], ) |
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233 ret._values[section] = {} |
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234 else: |
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235 if section is None: |
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236 raise ValueError("setting %r without section" % line) |
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237 try: |
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238 setting, value = line.split("=", 1) |
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239 except ValueError: |
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240 setting = line |
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241 value = "true" |
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242 setting = setting.strip().lower() |
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243 if not _check_variable_name(setting): |
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244 raise ValueError("invalid variable name %s" % setting) |
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245 if value.endswith("\\\n"): |
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246 value = value[:-2] |
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247 continuation = True |
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248 else: |
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249 continuation = False |
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250 value = _parse_string(value) |
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251 ret._values[section][setting] = value |
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252 if not continuation: |
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253 setting = None |
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254 else: # continuation line |
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255 if line.endswith("\\\n"): |
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256 line = line[:-2] |
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257 continuation = True |
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258 else: |
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259 continuation = False |
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260 value = _parse_string(line) |
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261 ret._values[section][setting] += value |
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262 if not continuation: |
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263 setting = None |
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264 return ret |
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265 |
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266 @classmethod |
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267 def from_path(cls, path): |
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268 """Read configuration from a file on disk.""" |
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269 f = GitFile(path, 'rb') |
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270 try: |
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271 ret = cls.from_file(f) |
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272 ret.path = path |
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273 return ret |
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274 finally: |
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275 f.close() |
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276 |
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277 def write_to_path(self, path=None): |
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278 """Write configuration to a file on disk.""" |
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279 if path is None: |
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280 path = self.path |
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281 f = GitFile(path, 'wb') |
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282 try: |
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283 self.write_to_file(f) |
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284 finally: |
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285 f.close() |
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286 |
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287 def write_to_file(self, f): |
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288 """Write configuration to a file-like object.""" |
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289 for section, values in self._values.iteritems(): |
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290 try: |
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291 section_name, subsection_name = section |
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292 except ValueError: |
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293 (section_name, ) = section |
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294 subsection_name = None |
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295 if subsection_name is None: |
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296 f.write("[%s]\n" % section_name) |
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297 else: |
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298 f.write("[%s \"%s\"]\n" % (section_name, subsection_name)) |
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299 for key, value in values.iteritems(): |
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300 f.write("%s = %s\n" % (key, _escape_value(value))) |
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301 |
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302 |
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303 class StackedConfig(Config): |
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304 """Configuration which reads from multiple config files..""" |
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305 |
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306 def __init__(self, backends, writable=None): |
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307 self.backends = backends |
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308 self.writable = writable |
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309 |
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310 def __repr__(self): |
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311 return "<%s for %r>" % (self.__class__.__name__, self.backends) |
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312 |
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313 @classmethod |
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314 def default_backends(cls): |
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315 """Retrieve the default configuration. |
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316 |
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317 This will look in the repository configuration (if for_path is |
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318 specified), the users' home directory and the system |
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319 configuration. |
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320 """ |
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321 paths = [] |
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322 paths.append(os.path.expanduser("~/.gitconfig")) |
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323 paths.append("/etc/gitconfig") |
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324 backends = [] |
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325 for path in paths: |
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326 try: |
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327 cf = ConfigFile.from_path(path) |
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328 except (IOError, OSError), e: |
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329 if e.errno != errno.ENOENT: |
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330 raise |
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331 else: |
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332 continue |
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333 backends.append(cf) |
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334 return backends |
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335 |
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336 def get(self, section, name): |
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337 for backend in self.backends: |
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338 try: |
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339 return backend.get(section, name) |
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340 except KeyError: |
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341 pass |
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342 raise KeyError(name) |
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343 |
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344 def set(self, section, name, value): |
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345 if self.writable is None: |
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346 raise NotImplementedError(self.set) |
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347 return self.writable.set(section, name, value) |