Support preview .NET versions in vscode acquisition

[nagilson]

Resolves #2759

I also built the VSIX to confirm manually that it works now, and will have vendors also try our testing plan with preview versions.

[Copilot]

Pull request overview

This PR updates the runtime acquisition library + extension to correctly recognize and compare fully specified pre-release .NET versions (e.g. -preview.*, -rc.*), addressing pinned global.json scenarios that previously failed version parsing and install matching (issue #2759).

Changes:

• Add pre-release-aware version parsing/comparison helpers (via semver) and use them in conflict/upgrade detection and “latest installed” selection.
• Fix legacy global install-id version extraction so versions containing -preview/-rc are not truncated.
• Expand tests and distro package support data to cover pre-release/11.0 scenarios.

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
vscode-dotnet-runtime-library/src/Utils/InstallIdUtilities.ts	Preserve full pre-release version when extracting version from legacy global install IDs.
vscode-dotnet-runtime-library/src/Acquisition/VersionUtilities.ts	Add pre-release helpers (getPreReleaseSuffix, comparisons including pre-release, etc.).
vscode-dotnet-runtime-library/src/Acquisition/VersionResolver.ts	Accept -preview/-rc suffixes when validating version input formatting.
vscode-dotnet-runtime-library/src/Acquisition/WinMacGlobalInstaller.ts	Use pre-release-aware comparison to treat newer previews as upgrades (not conflicts).
vscode-dotnet-runtime-library/src/Acquisition/LinuxVersionResolver.ts	Detect SDK patch/pre-release upgrades correctly on Linux global installs.
vscode-dotnet-runtime-library/src/Acquisition/LocalInstallUpdateService.ts	Select newest install using pre-release-aware version comparison.
vscode-dotnet-runtime-library/src/Acquisition/GenericDistroSDKProvider.ts	Treat fully specified pre-release SDKs from dotnet --version as valid installed versions.
vscode-dotnet-runtime-library/src/Acquisition/DotnetInstall.ts	Correctly classify pre-release runtime versions vs SDK versions.
vscode-dotnet-runtime-library/src/Acquisition/DotnetConditionValidator.ts	Fix x.y.0 handling and enforce exact pre-release identity when rollForward is disable.
vscode-dotnet-runtime-library/src/Acquisition/GlobalInstallerResolver.ts	Update SDK resolution comments/error text now that pre-releases are supported.
vscode-dotnet-runtime-library/distro-data/distro-support.json	Add .NET 11.0 package IDs to supported SDK/runtime/aspnetcore lists for multiple distros.
vscode-dotnet-runtime-library/src/test/unit/WinMacGlobalInstaller.test.ts	Add regression test for preview upgrade vs conflict behavior on Windows.
vscode-dotnet-runtime-library/src/test/unit/VersionUtilities.test.ts	Add tests for pre-release detection, suffix parsing, and ordering semantics.
vscode-dotnet-runtime-library/src/test/unit/InstallIdUtilities.test.ts	New tests ensuring global legacy install-id parsing preserves pre-release versions.
vscode-dotnet-runtime-library/src/test/unit/DotnetConditionValidator.test.ts	Add tests ensuring rollForward disable distinguishes pre-release identities and x.y.0.
vscode-dotnet-runtime-extension/src/LanguageModelTools.ts	Use pre-release-aware ordering when selecting highest patch within a feature band.
vscode-dotnet-runtime-extension/src/test/functional/LanguageModelTools.test.ts	Add functional tests for ordering stable > preview and preview.6 > preview.5.

[Copilot]

Pull request overview

Copilot reviewed 32 out of 32 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 32 out of 32 changed files in this pull request and generated 2 comments.

Comments suppressed due to low confidence (1)

vscode-dotnet-runtime-library/src/Acquisition/VersionUtilities.ts:290

• isFullySpecifiedPreviewVersion returns true for both preview and rc suffixes (and the docs/tests reflect that). The name is misleading and can cause incorrect assumptions by callers; consider renaming it to something like isFullySpecifiedPreReleaseVersion/isFullySpecifiedPrereleaseVersion and updating call sites.

export function isFullySpecifiedPreviewVersion(version: string, eventStream: IEventStream, context: IAcquisitionWorkerContext): boolean
{
    return isHistoricalDotnetPreReleaseSuffix(getPreReleaseSuffix(version)) &&
        isFullySpecifiedVersion(getVersionWithoutPreReleaseSuffix(version), eventStream, context);
}

[Copilot]

Pull request overview

Copilot reviewed 34 out of 34 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (1)

vscode-dotnet-runtime-library/src/Acquisition/DistroTypes.ts:4

• This new file appears to contain CRLF line endings / stray \r characters in the header (visible in the repo view output). Please normalize the file to LF so it matches the rest of the repository and avoids noisy diffs / potential lint issues.

/*---------------------------------------------------------------------------------------------
*  Licensed to the .NET Foundation under one or more agreements.
*  The .NET Foundation licenses this file to you under the MIT license.
*--------------------------------------------------------------------------------------------*/

[Copilot]

Pull request overview

Copilot reviewed 34 out of 34 changed files in this pull request and generated no new comments.

[mthalman]

This is a breaking change since VersionUtilities is exported for this library:

vscode-dotnet-runtime/vscode-dotnet-runtime-library/src/index.ts

Line 37 in 7fb823b

export * from './Acquisition/VersionUtilities';