Add targeted library filtering to RegenPreview

[Copilot]

RegenPreview.ps1 previously required regenerating all matching libraries or selecting them interactively. This adds direct filtering by library name for faster local validation.

• Library filtering

  • Add a comma-separated -Libraries parameter.
  • Compose name filtering with -Azure, -Unbranded, -Mgmt, and -Select.
  • Report requested libraries that do not match the active filters.

• Mode handling

  • Reject -Libraries in OpenAI and Spector modes.
  • Preserve interactively selected subsets during generator planning.

• Documentation

  • Document supported combinations and usage.

.\RegenPreview.ps1 `
  -SdkLibraryRepoPath "C:\repos\azure-sdk-for-net" `
  -Libraries "Azure.ResourceManager.AppContainers, Azure.Data.AppConfig"

• Fixes Update RegenPreview Local Script to Allow Specified Library to Regen #11612

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[pkg-pr-new]

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npm i https://pkg.pr.new/@typespec/http-client-csharp@11644

commit: 547f880

[Copilot]

Pull request overview

Adds a -Libraries filter to the http-client-csharp RegenPreview workflow so developers can regenerate only specific Azure SDK library folders by name, improving local iteration speed and reducing unnecessary regen work.

Changes:

• Added Filter-LibrariesByName helper and exported it from RegenPreview.psm1.
• Introduced -Libraries parameter parsing/validation in RegenPreview.ps1 and composed it with existing generator/interactive selection filters.
• Updated RegenPreview documentation to describe -Libraries usage and constraints.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
packages/http-client-csharp/eng/scripts/RegenPreview.psm1	Adds Filter-LibrariesByName and exports it for use by the main script.
packages/http-client-csharp/eng/scripts/RegenPreview.ps1	Parses -Libraries, validates exclusivity rules, and applies name filtering across selection/analyze/regen flows.
packages/http-client-csharp/eng/scripts/docs/RegenPreview.md	Documents the new -Libraries option and updates OpenAI-mode notes/examples.

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