Mercurial > hgrepos > Python > libs > ConfigMix

annotate configmix/__init__.py @ 79:a43749f751e0

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Put a copyright and license note into every source file of the configmix package
author Franz Glasner <hg@dom66.de>
date Wed, 14 Mar 2018 23:58:47 +0100
parents 3a8f712d27df
children 218807d7d883
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1 # -*- coding: utf-8 -*-
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2 #-
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3 # :Copyright: (c) 2015-2018, Franz Glasner. All rights reserved.
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4 # :License: 3-clause BSD. See LICENSE.txt for details.
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5 #-
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6 r"""
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7 configmix
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8 ^^^^^^^^^
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9
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10 A library for helping with configuration files.
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11
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12 :Author: Franz Glasner
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13 :Copyright: Copyright (c) 2015-2018, Franz Glasner.
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14 All rights reserved.
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15 :License: 3-clause BSD License.
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16 See LICENSE.txt for details.
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17 :ID: $Header$
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18
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19 """
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20
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21 from __future__ import division, print_function, absolute_import
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22
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23
45
839dc9610aee +++++ v0.5
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24 __version__ = "0.5"
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25
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26 __revision__ = "$Revision$"
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27
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29 import copy
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30
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31 from .config import Configuration
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34 __all__ = ["load", "Configuration"]
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36
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37 def load(*files):
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38 """Load the given configuration files, merge them in the given order
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39 and return the resulting :class:`configmix.config.Configuration` dictionary.
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40
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41 """
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42 if not files:
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43 return Configuration()
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44 else:
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45 ex = merge(None, _load_cfg_from_file(files[0]))
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46 for f in files:
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47 ex = merge(_load_cfg_from_file(f), ex)
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48 return Configuration(ex)
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49
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50
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51 def _load_cfg_from_file(filename):
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52 fnl = filename.lower()
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53 if fnl.endswith(".yml") or fnl.endswith("yaml"):
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54 from . import yaml
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55 with open(filename, "rb") as yf:
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56 return yaml.safe_load(yf)
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57 elif fnl.endswith(".py"):
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58 from . import py
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59 return py.load(filename)
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60 elif fnl.endswith(".ini"):
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61 from . import ini
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62 return ini.load(filename)
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63 else:
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64 raise ValueError("Unknown configuration file type for filename "
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65 "%r" % filename)
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67
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68 if 0:
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69 #
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70 # From: https://github.com/jet9/python-yconfig/blob/master/yconfig.py
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71 # License: BSD License
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72 #
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73 def dict_merge(a, b):
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74 """Recursively merges dict's. not just simple a['key'] = b['key'], if
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75 both a and bhave a key who's value is a dict then dict_merge is called
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76 on both values and the result stored in the returned dictionary."""
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78 if not isinstance(b, dict):
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79 return b
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80 result = deepcopy(a)
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81 for k, v in b.iteritems():
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82 if k in result and isinstance(result[k], dict):
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83 result[k] = dict_merge(result[k], v)
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84 else:
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85 result[k] = deepcopy(v)
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86 return result
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88
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89 def merge(user, default, _first=True):
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90 """A simple (YAML-)tree merge.
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91
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92 From http://stackoverflow.com/questions/823196/yaml-merge-in-python
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93
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94 .. note:: `_first` is an internal argument.
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95
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96 """
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97 if _first and (user is None):
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98 return default
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99 if isinstance(user, dict) and isinstance(default, dict):
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100 for k, v in default.items():
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101 if k not in user:
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102 user[k] = v
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103 else:
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104 user[k] = merge(user[k], v, False)
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105 return user
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107
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108 def safe_merge(user, default, _first=True):
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109 """A more safe version of :func:`merge()` that makes shallow copies of
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110 the returned container objects.
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111
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112 .. note:: `_first` is an internal argument.
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114 """
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115 if _first and (user is None):
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116 return copy.copy(default)
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117 user = copy.copy(user)
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118 if isinstance(user, dict) and isinstance(default, dict):
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119 for k, v in default.items():
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120 if k not in user:
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121 user[k] = copy.copy(v)
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122 else:
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123 user[k] = merge(user[k], v, False)
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124 return user