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import configparser |
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import sys |
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import os |
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5
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try: |
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6
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from envtpl import render_string |
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except Exception: |
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def render_string(*args, **kwargs): |
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raise Exception("envtpl.render_string() not available") |
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10
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11
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12
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MFCONFIG = os.environ.get("MFCONFIG", "GENERIC").lower() |
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14
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15
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def get_real_option(option): |
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return option.split("[")[0] |
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def get_variant(option): |
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if "[" not in option or "]" not in option: |
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return None |
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tmp = option.split("[")[1].split("]")[0] |
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if len(tmp) == 0: |
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return None |
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return tmp |
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def get_score(variant, configuration_name): |
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if variant == configuration_name: |
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return sys.maxsize |
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if variant is None: |
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return 0.5 |
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tmp = configuration_name.split("_") |
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if len(tmp) > 1: |
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for i in range(len(tmp) - 1, 0, -1): |
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tmp2 = "_".join(tmp[0:i]) |
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if variant == tmp2: |
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return i |
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return 0 |
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41
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42
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class OpinionatedConfigParser(configparser.ConfigParser): |
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def __init__( |
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self, |
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configuration_name=None, |
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ignore_sections_starting_with="_", |
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use_envtpl=False, |
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envtpl_extra_variables={}, |
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envtpl_extra_search_paths=[], |
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*args, |
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**kwargs |
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): |
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if configuration_name is not None: |
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self.configuration_name = configuration_name.lower() |
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else: |
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self.configuration_name = MFCONFIG |
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if "delimiters" not in kwargs: |
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kwargs["delimiters"] = ("=",) |
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59
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if "comment_prefixes" not in kwargs: |
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kwargs["comment_prefixes"] = ("#",) |
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if "interpolation" not in kwargs: |
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kwargs["interpolation"] = configparser.ExtendedInterpolation() |
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63
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if "default_section" in kwargs: |
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64
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# we can't use configparser default_section feature |
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# so we will emulate later in the code |
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self.__default_section = kwargs["default_section"] |
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else: |
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self.__default_section = None |
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kwargs["default_section"] = None |
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self.use_envtpl = use_envtpl |
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self.envtpl_extra_variables = envtpl_extra_variables |
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self.envtpl_extra_search_paths = envtpl_extra_search_paths |
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self.ignore_sections_starting_with = ignore_sections_starting_with |
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configparser.ConfigParser.__init__(self, *args, **kwargs) |
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76
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def read(self, *args, **kwargs): |
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configparser.ConfigParser.read(self, *args, **kwargs) |
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self._resolve_variant() |
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80
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def read_dict(self, *args, **kwargs): |
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configparser.ConfigParser.read_dict(self, *args, **kwargs) |
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self._resolve_variant() |
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84
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def read_string(self, *args, **kwargs): |
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configparser.ConfigParser.read_string(self, *args, **kwargs) |
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86
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self._resolve_variant() |
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87
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88
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def read_file(self, *args, **kwargs): |
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configparser.ConfigParser.read_file(self, *args, **kwargs) |
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self._resolve_variant() |
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92
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def _resolve_variant(self): |
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def deal_with_option(tmp, read_section, write_section, option): |
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real_option = get_real_option(option) |
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variant = get_variant(option) |
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score = get_score(variant, self.configuration_name) |
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if score == 0: |
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return |
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if real_option in tmp[write_section]: |
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if score <= tmp[write_section][real_option][0]: |
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# not better score |
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return |
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103
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value = self.get(read_section, option) |
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104
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if self.use_envtpl: |
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value = render_string( |
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value, |
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die_on_missing_variable=False, |
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extra_variables=self.envtpl_extra_variables, |
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extra_search_paths=self.envtpl_extra_search_paths, |
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) |
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tmp[write_section][real_option] = (score, value) |
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113
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has_default = ( |
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114
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self.__default_section is not None |
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and self.__default_section in self.sections() |
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116
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) |
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117
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# first pass |
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118
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tmp = {} |
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119
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for section in self.sections(): |
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tmp[section] = {} |
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121
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for option in self.options(section): |
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deal_with_option(tmp, section, section, option) |
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123
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if has_default: |
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124
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for option in self.options(self.__default_section): |
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125
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deal_with_option( |
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126
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tmp, self.__default_section, section, option |
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127
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) |
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128
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# clear |
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129
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self.clear() |
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130
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# second pass |
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131
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for section in tmp.keys(): |
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132
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if self.ignore_sections_starting_with and section.startswith( |
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133
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self.ignore_sections_starting_with |
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134
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): |
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135
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continue |
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136
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for real_option in tmp[section].keys(): |
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137
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value = tmp[section][real_option][1] |
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138
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if not self.has_section(section): |
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139
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self.add_section(section) |
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140
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self.set(section, real_option, value) |
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141
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metwork-framework /
opinionated_configparser
