App namespace resolution #1789

[khiron]

Added the ability to dynamically create and register apps for the purpose of testing name space collisions

Added the ability to mock up the stevedore.extension.ExtensionManager so we can directly put extensions in without having to change the virtual environment's site-packages

Added tests for namespace collision

[khiron]

pkg_resources has been deprecated for Python 3.12

Unfortunately I am using it to verify when a new package I have pip installed appears to the environment. Working on an alternative strategy for dynamically loading packages. For now I'll back out the dynamic installation code as it's not needed to test namespace collision as we can use a mocked ExtensionManager

[khiron]

pkg_resources can be mostly replaced with import_lib with the exception of rebuilding the working set.

import_lib.invalidate.caches() does some of what rebuilding the working set does, but it's not guaranteed to see a change to the environment. Stevedore apparently switched to import_lib.metadata recently which results in the stevedore cache not being updated immediately a new package is installed. The recommended approach is to restart the python interpreter which is not feasible in the context of cogent3 acquiring the latest packages.

For now invalidate_caches will be sufficient for at least one test. Which is sufficient.

[coveralls]

Pull Request Test Coverage Report for Build 8514459137

Details

• 23 of 29 (79.31%) changed or added relevant lines in 1 file are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.009%) to 91.605%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/cogent3/app/init.py	23	29	79.31%

Files with Coverage Reduction	New Missed Lines	%
src/cogent3/app/init.py	2	92.65%

Totals
Change from base Build 8513554612:	-0.009%
Covered Lines:	29636
Relevant Lines:	32352

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💛 - Coveralls