Add `-Suppress` parameter

[iRon7]

PSScriptAnalyzer might potentially -Fix my scripts, but that is not possible for every rule (especially where it concerns false positives, such as #1472) and sometimes the "fix" is unwanted. In such a case I would like to be able to easily suppress the (remaining) violations with a command like:

Invoke-ScriptAnalyzer .\MyScript.ps1 -Suppress

^{(or something like: -SuppressViolations as there exist already some other -Suppress* parameters)}

Where I would expect an as-narrow-as-possible suppression (using the ConditionalAttribute) for the SuppressMessageAttribute on the concerned (inner) function.

[bergmeister]

Would you be willing to implement such functionality? Personally, I'd rather like to see such functionality in the VS-Code extension first on a per violation basis as a starter. There is also the trap of making things to easy where people suppress all violations without having looked at all of them in too much detail, which would strengthen my argument, that it should be easier to do that in the editor.

[iRon7]

@bergmeister

There is also the trap of making things to easy where people suppress all violations

You have a point there.

At the other hand, as a person who added PSScriptAnalyzer to our CICD street, it is easier to explain users to suppress rules in there script with a -Suppress switch then explaining how to implement the SuppressMessageAttribute annotation (I assume that this must count for you as well). Besides they might take the easy way here as well by e.g. suppressing all PSReviewUnusedParameter violations rather than a specific one...

[SydneyhSmith]

I agree that suppression should happen in a per rule basis which we support today, suppression is also as a part of your script, there is more information in this blog https://devblogs.microsoft.com/scripting/psscriptanalyzer-deep-dive-part-2-of-4/