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annotate libervia/backend/tools/config.py @ 4149:c36295487082

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core: introduce Pydantic based models in `libervia.backend.models.core`
author Goffi <goffi@goffi.org>
date Wed, 22 Nov 2023 14:31:05 +0100
parents 4b842c1fb686
children 0d7bb4df2343
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1 #!/usr/bin/env python3
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2
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3
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4 # SAT: a jabber client
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5 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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6 # Copyright (C) 2013-2016 Adrien Cossa (souliane@mailoo.org)
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7
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8 # This program is free software: you can redistribute it and/or modify
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9 # it under the terms of the GNU Affero General Public License as published by
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10 # the Free Software Foundation, either version 3 of the License, or
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11 # (at your option) any later version.
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12
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13 # This program is distributed in the hope that it will be useful,
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14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 # GNU Affero General Public License for more details.
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17
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18 # You should have received a copy of the GNU Affero General Public License
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19 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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20
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21 """ Configuration related useful methods """
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22
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23 import os
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24 import csv
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25 import json
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26 from typing import Any
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27 from configparser import ConfigParser, DEFAULTSECT, NoOptionError, NoSectionError
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28 from xdg import BaseDirectory
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29 from libervia.backend.core.log import getLogger
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30 from libervia.backend.core.constants import Const as C
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31 from libervia.backend.core.i18n import _
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32 from libervia.backend.core import exceptions
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33
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34 log = getLogger(__name__)
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35
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36
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37 def fix_config_option(section, option, value, silent=True):
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38 """Force a configuration option value
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39
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40 the option will be written in the first found user config file, a new user
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41 config will be created if none is found.
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42
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43 @param section (str): the config section
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44 @param option (str): the config option
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45 @param value (str): the new value
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46 @param silent (boolean): toggle logging output (must be True when called from sat.sh)
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47 """
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48 config = ConfigParser()
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49 target_file = None
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50 for file_ in C.CONFIG_FILES[::-1]:
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51 # we will eventually update the existing file with the highest priority,
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52 # if it's a user personal file...
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53 if not silent:
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54 log.debug(_("Testing file %s") % file_)
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55 if os.path.isfile(file_):
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56 if file_.startswith(os.path.expanduser("~")):
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57 config.read([file_])
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58 target_file = file_
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59 break
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60 if not target_file:
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61 # ... otherwise we create a new config file for that user
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62 target_file = (
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63 f"{BaseDirectory.save_config_path(C.APP_NAME_FILE)}/{C.APP_NAME_FILE}.conf"
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64 )
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65 if section and section.upper() != DEFAULTSECT and not config.has_section(section):
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66 config.add_section(section)
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67 config.set(section, option, value)
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68 with open(target_file, "wb") as configfile:
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69 config.write(configfile) # for the next time that user launches sat
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70 if not silent:
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71 if option in ("passphrase",): # list here the options storing a password
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72 value = "******"
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73 log.warning(_("Config auto-update: {option} set to {value} in the file "
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74 "{config_file}.").format(option=option, value=value,
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75 config_file=target_file))
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76
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77
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78 def parse_main_conf(log_filenames=False):
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79 """Look for main .ini configuration file, and parse it
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80
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81 @param log_filenames(bool): if True, log filenames of read config files
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82 """
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83 config = ConfigParser(defaults=C.DEFAULT_CONFIG)
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84 try:
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85 filenames = config.read(C.CONFIG_FILES)
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86 except Exception as e:
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87 log.error(_("Can't read main config: {msg}").format(msg=e), exc_info=True)
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88 else:
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89 if log_filenames:
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90 if filenames:
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91 log.info(
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92 _("Configuration was read from: {filenames}").format(
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93 filenames=', '.join(filenames)))
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94 else:
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95 log.warning(
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96 _("No configuration file found, using default settings")
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97 )
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98
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99 return config
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100
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101
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102 def config_get(config, section, name, default=None):
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103 """Get a configuration option
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104
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105 @param config (ConfigParser): the configuration instance
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106 @param section (str): section of the config file (None or '' for DEFAULT)
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107 @param name (str): name of the option
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108 @param default: value to use if not found, or Exception to raise an exception
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109 @return (unicode, list, dict): parsed value
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110 @raise: NoOptionError if option is not present and default is Exception
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111 NoSectionError if section doesn't exists and default is Exception
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112 exceptions.ParsingError error while parsing value
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113 """
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114 if not section:
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115 section = DEFAULTSECT
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116
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117 try:
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118 value = config.get(section, name)
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119 except (NoOptionError, NoSectionError) as e:
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120 if default is Exception:
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121 raise e
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122 return default
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123
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124 if name.endswith("_path") or name.endswith("_dir"):
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125 value = os.path.expanduser(value)
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126 # thx to Brian (http://stackoverflow.com/questions/186857/splitting-a-semicolon-separated-string-to-a-dictionary-in-python/186873#186873)
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127 elif name.endswith("_list"):
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128 value = next(csv.reader(
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129 [value], delimiter=",", quotechar='"', skipinitialspace=True
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130 ))
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131 elif name.endswith("_dict"):
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132 try:
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133 value = json.loads(value)
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134 except ValueError as e:
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135 raise exceptions.ParsingError("Error while parsing data: {}".format(e))
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136 if not isinstance(value, dict):
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137 raise exceptions.ParsingError(
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138 "{name} value is not a dict: {value}".format(name=name, value=value)
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139 )
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140 elif name.endswith("_json"):
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141 try:
d1153ce68ca0 tools (config): complexe data can now be set using json and the "_json" suffix
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142 value = json.loads(value)
d1153ce68ca0 tools (config): complexe data can now be set using json and the "_json" suffix
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143 except ValueError as e:
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144 raise exceptions.ParsingError("Error while parsing data: {}".format(e))
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7ee9d9db67b9 memory, tools (config): move special config retrieval from memory to tools
souliane <souliane@mailoo.org>
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145 return value
3634
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146
3c7a64d6f49f bridge: bridge can now be set using environment variable:
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147
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148 def get_conf(
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149 conf: ConfigParser,
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150 prefix: str,
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151 section: str,
3c7a64d6f49f bridge: bridge can now be set using environment variable:
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152 name: str,
3c7a64d6f49f bridge: bridge can now be set using environment variable:
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153 default: Any
3c7a64d6f49f bridge: bridge can now be set using environment variable:
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154 ) -> Any:
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155 """Get configuration value from environment or config file
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156
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157 @param str: prefix to use for the varilable name (see `name` below)
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158 @param section: config section to use
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159 @param name: unsuffixed name.
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160 For environment variable, `LIBERVIA_<prefix>_` will be prefixed (and name
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161 will be set to uppercase).
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162 For config file, `<prefix>_` will be prefixed (and DEFAULT section will be
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163 used).
3c7a64d6f49f bridge: bridge can now be set using environment variable:
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164 Environment variable has priority over config values. If Environment variable
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165 is set but empty string, config value will be used.
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166 @param default: default value to use if varilable is set neither in environment,
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167 nor in config
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168 """
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169 # XXX: This is a temporary method until parameters are refactored
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parents: 3482
diff changeset
170 value = os.getenv(f"LIBERVIA_{prefix}_{name}".upper())
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diff changeset
171 return value or config_get(conf, section, f"{prefix}_{name}", default)