Mercurial > hgrepos > Python > libs > ConfigMix

annotate configmix/__init__.py @ 85:55601d769758

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Remove duplicate copyright/license block
author Franz Glasner <hg@dom66.de>
date Thu, 15 Mar 2018 00:19:13 +0100
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1 # -*- coding: utf-8 -*-
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2 """A library for helping with configuration files.
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4 :Author: Franz Glasner
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5 :Copyright: (c) 2015–2018, Franz Glasner.
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6 All rights reserved.
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7 :License: 3-clause BSD License.
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8 See LICENSE.txt for details.
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9 :ID: $Header$
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11 """
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13 from __future__ import division, print_function, absolute_import
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15
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16 __version__ = "0.5"
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17
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18 __revision__ = "$Revision$"
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21 import copy
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22
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23 from .config import Configuration
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26 __all__ = ["load", "Configuration"]
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29 def load(*files):
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30 """Load the given configuration files, merge them in the given order
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31 and return the resulting :class:`configmix.config.Configuration` dictionary.
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32
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33 """
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34 if not files:
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35 return Configuration()
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36 else:
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37 ex = merge(None, _load_cfg_from_file(files[0]))
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38 for f in files:
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39 ex = merge(_load_cfg_from_file(f), ex)
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40 return Configuration(ex)
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43 def _load_cfg_from_file(filename):
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44 fnl = filename.lower()
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45 if fnl.endswith(".yml") or fnl.endswith("yaml"):
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46 from . import yaml
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47 with open(filename, "rb") as yf:
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48 return yaml.safe_load(yf)
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49 elif fnl.endswith(".py"):
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50 from . import py
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51 return py.load(filename)
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52 elif fnl.endswith(".ini"):
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53 from . import ini
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54 return ini.load(filename)
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55 else:
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56 raise ValueError("Unknown configuration file type for filename "
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57 "%r" % filename)
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60 if 0:
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61 #
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62 # From: https://github.com/jet9/python-yconfig/blob/master/yconfig.py
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63 # License: BSD License
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64 #
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65 def dict_merge(a, b):
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66 """Recursively merges dict's. not just simple a['key'] = b['key'], if
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67 both a and bhave a key who's value is a dict then dict_merge is called
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68 on both values and the result stored in the returned dictionary."""
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69
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70 if not isinstance(b, dict):
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71 return b
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72 result = deepcopy(a)
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73 for k, v in b.iteritems():
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74 if k in result and isinstance(result[k], dict):
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75 result[k] = dict_merge(result[k], v)
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76 else:
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77 result[k] = deepcopy(v)
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78 return result
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80
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81 def merge(user, default, _first=True):
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82 """A simple (YAML-)tree merge.
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83
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84 From http://stackoverflow.com/questions/823196/yaml-merge-in-python
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86 .. note:: `_first` is an internal argument.
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87
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88 """
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89 if _first and (user is None):
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90 return default
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91 if isinstance(user, dict) and isinstance(default, dict):
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92 for k, v in default.items():
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93 if k not in user:
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94 user[k] = v
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95 else:
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96 user[k] = merge(user[k], v, False)
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97 return user
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99
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100 def safe_merge(user, default, _first=True):
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101 """A more safe version of :func:`merge()` that makes shallow copies of
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102 the returned container objects.
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103
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104 .. note:: `_first` is an internal argument.
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106 """
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107 if _first and (user is None):
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108 return copy.copy(default)
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109 user = copy.copy(user)
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110 if isinstance(user, dict) and isinstance(default, dict):
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111 for k, v in default.items():
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112 if k not in user:
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113 user[k] = copy.copy(v)
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114 else:
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115 user[k] = merge(user[k], v, False)
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116 return user