Ian Wienand 93f1e0937c Order old importlib-metadata results by group
A Debian Buster-based zuul-jobs test started failing when using stestr
recently [1].  Upon further investigation, this is a Python 3.7
environment which is affected by a recent breaking change to
importlib_metadata.

It seems stevedore worked around this with
Ib9c2b0a14edea91e97d122d2ac93b650029f918e, which was released with
3.5.1 -- but I was still seeing the issue.

Upon further investigation, the "real_groups" dict being returned here
with importlib-metadata 4.12.0 is in buckets by group, e.g.

 {'group.one': [EntryPoint(name='foo', ... , group='group.one'),
                EntryPoint(name='bar', ... , group='group.one')],
  'group.two': [EntryPoint(name='moo', ... , group='group.two'),
                EntryPoint(name='goo', ... , group='group.two')],
 }

This current code seems to return a dict with entry-points by thier
name, e.g.

 {'foo': EntryPoint(name='foo', ... , group='group.one),
  'bar': EntryPoint(name='bar', ... , group='group.one),
  'moo': EntryPoint(name='moo', ... , group='group.two),
  'goo': EntryPoint(name='goo', ... , group='group.two)
 }

This reorgansies the fixup routine to put entry-points in a bucket by
their group.  With this change, stestr is again finding it's command
plugins.

[1] https://github.com/mtreinish/stestr/issues/336
[2] https://github.com/python/importlib_metadata/issues/409

Change-Id: I3496ab1dfa312b1098a869cdfd9a0c6f81653b28
(cherry picked from commit 5189992d719ad15e0e3504947895bf5ba9dc7a1d)
2022-10-19 11:17:28 +01:00
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2018-07-05 18:04:48 +07:00
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2012-06-19 14:33:24 -04:00
2019-04-25 01:07:11 +00:00
2020-04-21 15:14:10 +01:00
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stevedore -- Manage dynamic plugins for Python applications

Latest Version

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Python makes loading code dynamically easy, allowing you to configure and extend your application by discovering and loading extensions ("plugins") at runtime. Many applications implement their own library for doing this, using __import__ or importlib. stevedore avoids creating yet another extension mechanism by building on top of setuptools entry points. The code for managing entry points tends to be repetitive, though, so stevedore provides manager classes for implementing common patterns for using dynamically loaded extensions.

Description
Manage dynamic plugins for Python applications
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