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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
commit 9773a1f289
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149 changed files with 407 additions and 766 deletions
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8
lib/ansible/plugins/inventory/toml.py
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@ -100,6 +100,7 @@ from ansible.module_utils.common._collections_compat import MutableMapping, Muta
from ansible.module_utils.six import string_types, text_type
from ansible.parsing.yaml.objects import AnsibleSequence, AnsibleUnicode
from ansible.plugins.inventory import BaseFileInventoryPlugin
from ansible.utils.display import Display
try:
import toml
@ -107,12 +108,7 @@ try:
except ImportError:
HAS_TOML = False
try:
from __main__ import display
except ImportError:
from ansible.utils.display import Display
display = Display()
display = Display()
WARNING_MSG = (
'The TOML inventory format is marked as preview, which means that it is not guaranteed to have a backwards '