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Add a Singleton metaclass, use it with Display (#48935)

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* Add a Singleton class, use it with Display

* update six import

* Move remaining failes to display singleton

* Fix rebase issues

* Singleton improvements

* Add code-smell for 'from __main__ import display'. ci_complete

* s/self/cls/g

* Add docs for no-main-display

* Address linting issues

* Add changelog fragment. ci_complete

* Implement reentrant lock for class instantiation in Singleton

* Add Display singleton porting guide
This commit is contained in:
Matt Martz 2018-11-20 17:06:51 -06:00 • committed by GitHub
parent 54a2f21f93
commit 9773a1f289
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149 changed files with 407 additions and 766 deletions
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7
docs/docsite/rst/dev_guide/developing_plugins.rst
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@ -236,12 +236,9 @@ Here's a simple lookup plugin implementation --- this lookup returns the content
"""
from ansible.errors import AnsibleError, AnsibleParserError
from ansible.plugins.lookup import LookupBase
from ansible.utils.display import Display
try:
from __main__ import display
except ImportError:
from ansible.utils.display import Display
display = Display()
display = Display()
class LookupModule(LookupBase):