`Invoke-ScriptAnalyzer` parameterset ambiguity

Invoke-ScriptAnalyzer のパラメーター宣言から始め、Path と ScriptDefinition のパラメーター セットを、それらの位置指定バインドおよびパイプライン バインドのメタデータを含めて確認します。ScriptDefinition が到達不能な位置指定バインドまたはパイプラインからの値によるバインドを示さなくなり、プロパティ名によるバインドは引き続き利用できるようになったら完了です。issue の例に照らして、結果として得られるコマンドの動作を検証してください。

Summary

Both the -Path and -ScriptDefinition parameters of Invoke-ScriptAnalyzer are [string] parameters. Both accept ValueFromPipeline and both are declared as Position=0. While they exist in different parameter sets (each with two variants), there is no unique parameter in either set that would allow PowerShell to disambiguate and select the intended parameter set during binding.

As a result, the default parameter set (Path_SuppressedOnly) is always chosen. Any string passed down the pipeline (by value) or as a positional argument is bound to the Path parameter. This means that ScriptDefinition's Position=0 and pipeline (by value) binding declarations are effectively unreachable - any positional or pipeline string will always be bound to Path.

This isn't a bug, but is a design issue: the ScriptDefinition parameter advertises pipeline (by value) and positional binding, but there is no way for users to actually use these features due to parameter set ambiguity.

I propose removing ValueFromPipeline = true and Position = 0 from ScriptDefinition. This isn't a breaking change as they can't currently be used.

ValueFromPipelineByPropertyName is fine - the below works:

[PSCustomObject]@{ScriptDefinition = '$Var = 1'} | Invoke-ScriptAnalyzer

Environment data

> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      7.4.11
PSEdition                      Core
GitCommitId                    7.4.11
OS                             Microsoft Windows 10.0.22631
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

> (Get-Module -ListAvailable PSScriptAnalyzer).Version | ForEach-Object { $_.ToString() }

1.24.0