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import sys |
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import os |
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import jinja2 |
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if sys.version_info[:2] < (3, 5): |
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# pylint: disable=E0401 |
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from backports import configparser |
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else: |
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# pylint: disable=E0401 |
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import configparser |
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IS_PYTHON_2 = sys.version_info < (3, 0) |
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def get_real_option(option): |
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if "[" not in option: |
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return option |
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if not option.endswith("]"): |
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return option |
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return option.split("[", 1)[0] |
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def get_default_configuration_name(): |
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return os.environ.get("MFCONFIG", "GENERIC").lower() |
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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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if not option.endswith("]"): |
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return None |
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tmp = option.split("[", 1)[1][:-1] |
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if len(tmp) == 0: |
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return None |
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return tmp.lower() |
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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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class Jinja2Interpolation(configparser.Interpolation): |
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def __init__(self, jinja2_context, **template_kwargs): |
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if "undefined" not in template_kwargs: |
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template_kwargs["undefined"] = jinja2.Undefined |
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self.__template_kwargs = template_kwargs |
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self.__jinja2_context = jinja2_context |
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configparser.Interpolation.__init__(self) |
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def before_get(self, parser, section, option, value, defaults): |
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template = jinja2.Template(value, **self.__template_kwargs) |
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return template.render(self.__jinja2_context) |
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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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*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 = get_default_configuration_name() |
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if "default_section" in kwargs: |
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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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if "interpolation" not in kwargs: |
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if IS_PYTHON_2: |
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tmp = {} |
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for x, y in os.environ.items(): |
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try: |
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tmp[x] = y.decode('utf8') |
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except Exception: |
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print(x) |
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# probably a unicode error |
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pass |
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kwargs["interpolation"] = Jinja2Interpolation(tmp) |
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else: |
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kwargs["interpolation"] = Jinja2Interpolation(os.environ) |
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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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def read(self, *args, **kwargs): |
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tmp = configparser.ConfigParser.read(self, *args, **kwargs) |
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self._resolve_variant() |
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return tmp |
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107
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def read_dict(self, *args, **kwargs): |
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tmp = configparser.ConfigParser.read_dict(self, *args, **kwargs) |
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self._resolve_variant() |
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return tmp |
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def read_string(self, *args, **kwargs): |
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tmp = configparser.ConfigParser.read_string(self, *args, **kwargs) |
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self._resolve_variant() |
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return tmp |
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def read_file(self, *args, **kwargs): |
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tmp = configparser.ConfigParser.read_file(self, *args, **kwargs) |
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self._resolve_variant() |
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return tmp |
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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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value = self.get(read_section, option) |
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tmp[write_section][real_option] = (score, value) |
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has_default = ( |
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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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) |
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# first pass |
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tmp = {} |
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for section in self.sections(): |
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tmp[section] = {} |
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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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if has_default: |
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for option in self.options(self.__default_section): |
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deal_with_option( |
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tmp, self.__default_section, section, option |
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) |
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# clear |
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self.clear() |
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# second pass |
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for section in tmp.keys(): |
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if self.ignore_sections_starting_with and section.startswith( |
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self.ignore_sections_starting_with |
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): |
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continue |
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159
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for real_option in tmp[section].keys(): |
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value = tmp[section][real_option][1] |
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if not self.has_section(section): |
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self.add_section(section) |
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self.set(section, real_option, value) |
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metwork-framework /
opinionated_configparser
