dotnet backend should use semVerLevel when searching NuGet

[281742759-smi]

I was looking to install roslyn-language-server, but was unable to (adding prerelease alone does not fix this). After going down the rabbit trail, I noticed that the dotnet CLI includes semVerLevel when searching NuGet:

This is a field for internal nuget back compatibility should be "2.0.0" for all new API usage

When adding this field to the NuGet search for mise, the tool is successfully returned. It would be great if semVerLevel=2.0.0 could be added to the list of query params mise uses to search NuGet.

[281742759-smi]

Also, prerelease might be hard-coded to true in src/backend/dotnet.rs (--verbose shows that it's in the query params as true whether you pass --prerelease or not), so configuring that might not change anything 🤔 Different bug, but bringing it up nonetheless.

[risu729]

That's intended; mise retrieves all versions from the remote source, including prereleases, then filters them out later while resolving actual versions. Is it causing any real issues?

[281742759-smi]

Gotcha. I can understand that. This one isn't causing real issues. It's just something I noticed when I ran mise ls-remote --verbose that prerelease was always passed as true in the query params.

The main post is definitely still an issue, though. We don't have the same default as dotnet tool search, which sets semVerLevel=2.0.0. Without it, I can't install packages like roslyn-language-server.

[risu729]

Yeah, I don't have time to look into it now, but it sounds a good fix for me.

[JamBalaya56562]

The semVerLevel=2.0.0 change is merged in #10384 and will be in the next release.

On the prerelease point you raised — that one is intentional: mise''s NuGet search always requests prerelease=true so it fetches the full version list, then filters by the tool''s prerelease option (and the global prereleases setting) during version resolution. So the hard-coded true in the query doesn''t force prereleases on you; it just keeps them available to resolve when you opt in. (For roslyn-language-server specifically, every published version is a prerelease, so you''ll still want dotnet:roslyn-language-server[prerelease=true] to install it.)

Thanks for the detailed investigation!