.NET Core Sdk app/lib require a build before intellisense works

[enricosada]

Opening a new project, or cloned, or just restored, the intellisense doesnt work.

Affect projects created with the .NET Core Sdks:

• project.json based (preview2, preview2.1)
• msbuild based, so fsproj (preview3, preview4, ..)

Repro

dotnet new -l fsharp
dotnet restore
code .

Expected

Intellisense works

Actual

Intellisense doesnt work.

Workaround

Do a dotnet build BEFORE opening VS Code.

So the following works:

dotnet new -l fsharp
dotnet restore
dotnet build
code .

Why/TODO

That happen becauseFSAC read the response file generated after build to initialize FCS.
So no build, no response files.

Ideas for minor improvements /cc @Krzysztof-Cieslak @cloudRoutine for ideas

• watch after build if the response file exists, and reload it ?
• reinitialize FCS after build ?
• watch the response file found, and reinitialize if changed?

[czifro]

I figured I would comment here rather than xunit/xunit#859 since it seems more appropriate, but I upgraded dotnet core to preview4-004233 and did dotnet restore and dotnet build before opening vscode, but it still is showing errors where there is none, mainly references to packages or modules within the root namespace. Is there a step I am missing?

Additional Info:

VS Code Version => 1.8.1
Ionide-fsharp Version => 2.14.0
dotnet version => preview4-004233
OS => macOS Sierra 10.12.1

[enricosada]

@czifro can you check your fsproj is similar to these generated by dotnet new -l fsharp ? Or can i see the proj?

[czifro]

Here is my fsproj: https://github.com/czifro-tech/mudt/blob/master/fsharp/src/MUDT.fsproj

[enricosada]

Problem is you are using an fsproj for preview3.
Please change it like preview dotnet new -l fsharp -t lib ( so Sdk attribute, no imports and use fsharp.net.sdk 1.0.0-beta-*)
I'll try to fix it tomorrow If you cannot

[czifro]

That fixed it. Thank you!

[enricosada]

Done! fixed with 2.25.1

just dotnet restore is required.