Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/boto/plugin.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 # Copyright 2010 Google Inc. |
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2 # |
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3 # Permission is hereby granted, free of charge, to any person obtaining a |
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4 # copy of this software and associated documentation files (the |
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5 # "Software"), to deal in the Software without restriction, including |
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6 # without limitation the rights to use, copy, modify, merge, publish, dis- |
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7 # tribute, sublicense, and/or sell copies of the Software, and to permit |
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8 # persons to whom the Software is furnished to do so, subject to the fol- |
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9 # lowing conditions: |
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10 # |
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11 # The above copyright notice and this permission notice shall be included |
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12 # in all copies or substantial portions of the Software. |
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13 # |
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14 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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15 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL- |
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16 # ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT |
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17 # SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
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18 # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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19 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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20 # IN THE SOFTWARE. |
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21 |
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22 |
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23 """ |
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24 Implements plugin related api. |
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25 |
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26 To define a new plugin just subclass Plugin, like this. |
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27 |
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28 class AuthPlugin(Plugin): |
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29 pass |
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30 |
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31 Then start creating subclasses of your new plugin. |
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32 |
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33 class MyFancyAuth(AuthPlugin): |
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34 capability = ['sign', 'vmac'] |
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35 |
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36 The actual interface is duck typed. |
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37 """ |
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38 |
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39 import glob |
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40 import imp |
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41 import os.path |
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42 |
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43 |
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44 class Plugin(object): |
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45 """Base class for all plugins.""" |
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46 |
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47 capability = [] |
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48 |
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49 @classmethod |
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50 def is_capable(cls, requested_capability): |
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51 """Returns true if the requested capability is supported by this plugin |
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52 """ |
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53 for c in requested_capability: |
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54 if c not in cls.capability: |
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55 return False |
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56 return True |
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57 |
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58 |
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59 def get_plugin(cls, requested_capability=None): |
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60 if not requested_capability: |
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61 requested_capability = [] |
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62 result = [] |
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63 for handler in cls.__subclasses__(): |
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64 if handler.is_capable(requested_capability): |
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65 result.append(handler) |
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66 return result |
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67 |
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68 |
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69 def _import_module(filename): |
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70 (path, name) = os.path.split(filename) |
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71 (name, ext) = os.path.splitext(name) |
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72 |
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73 (file, filename, data) = imp.find_module(name, [path]) |
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74 try: |
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75 return imp.load_module(name, file, filename, data) |
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76 finally: |
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77 if file: |
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78 file.close() |
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79 |
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80 _plugin_loaded = False |
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81 |
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82 |
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83 def load_plugins(config): |
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84 global _plugin_loaded |
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85 if _plugin_loaded: |
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86 return |
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87 _plugin_loaded = True |
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88 |
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89 if not config.has_option('Plugin', 'plugin_directory'): |
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90 return |
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91 directory = config.get('Plugin', 'plugin_directory') |
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92 for file in glob.glob(os.path.join(directory, '*.py')): |
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93 _import_module(file) |