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PR Summary

Fix #18853

Enable creating composite subsystem implementation in modules.
It turns out the Kind member in ISubsystem is not needed. Whether an implementation derives from the target subsystem interface should be the only criteria to check if this implementation can be registered to the target subsystem.

Refactored the subsystem code to remove the Kind member from the base interface ISubsystem, so as to allow one class to implement multiple subsystem interfaces.

This is not a breaking change because the Kind member was made internal to prevent users from directly implement it. Now one can directly implements ISubsystem, but that implementation won't be able to be registered to PowerShell.

PR Checklist

@daxian-dbw daxian-dbw added CL-Engine Indicates that a PR should be marked as an engine change in the Change Log CL-General Indicates that a PR should be marked as a general cmdlet change in the Change Log and removed CL-Engine Indicates that a PR should be marked as an engine change in the Change Log labels Jan 4, 2023
@SteveL-MSFT
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@daxian-dbw please address the codefactor isses

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This PR has 186 quantified lines of changes. In general, a change size of upto 200 lines is ideal for the best PR experience!


Quantification details

Label      : Medium
Size       : +125 -61
Percentile : 57.2%

Total files changed: 10

Change summary by file extension:
.cs : +120 -56
.resx : +5 -5

Change counts above are quantified counts, based on the PullRequestQuantifier customizations.

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@daxian-dbw
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@SteveL-MSFT I fixed those CodeFactor issues that can be addressed. The remaining 2 are by design.

@daxian-dbw daxian-dbw merged commit eb31d32 into PowerShell:master Jan 5, 2023
@daxian-dbw daxian-dbw deleted the compositeSubsystem branch January 5, 2023 17:51
@ghost
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ghost commented Mar 14, 2023

🎉v7.4.0-preview.2 has been released which incorporates this pull request.:tada:

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Cannot implement both IFeedbackProvider and ICommandPredictor in same class

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