Ionide-vscode-fsharp: How to use FSI included in .Net Core?

[boyedarat]

The latest release of .Net Core (2.1.400) finally includes a working FSI:

dotnet "C:\Program Files\dotnet\sdk\2.1.400\FSharp\fsi.exe"

Microsoft (R) F# Interactive version 10.2.3 for F# 4.5
Copyright (c) Microsoft Corporation. All Rights Reserved.

For help type #help;;

>

How do I set it in FSharp.fsiFilePath?

TIA

[cartermp]

.NET SDK 2.1.400 does not include a working FSI - you'll find soon that anything beyond trivial code execution will fail, such as using an API from an assembly. It's an artifact of the build of the F# compiler SDK for .NET Core. When F# Interactive works properly for .NET Core, we'll make an announcement and have commands such as dotnet fsi available.

[Krzysztof-Cieslak]

As such there won’t be any effort to integrate it with Ionide in its current shape - we will wait for any true public preview / beta / release candidate.

[boyedarat]

Was running some simple scripts, did not know it is not official yet.
Sorry about that.

[ghost]

@boyedarat if you are adventurous, create a /usr/bin/fsharpi file that is on your PATH, (remember to chmod +x it) that contains:

dotnet ~/.dotnet/sdk/`dotnet --version`/FSharp/fsi.exe

[dariens]

To extend @abk-x 's comment, for windows:

1. Create a .cmd file that contains:
   dotnet "{path to fsi.exe within dotnet-sdk }"

   Example fsi.cmd file :

        dotnet "C:\Users\darien.shannon\scoop\apps\dotnet-sdk\2.1.403\sdk\2.1.403\FSharp\fsi.exe"
   

2. In VS Code settings, set the 'Fsi File Path' to reference this .cmd file:

   Example custom user setting in VS Code :

   "FSharp.fsiFilePath": "C:\\Users\\darien.shannon\\scoop\\apps\\dotnet-sdk\\2.1.403\\sdk\\2.1.403\\FSharp\\fsharpi\\fsi.cmd"
   

[lydell]

dotnet fsi is a thing these days. I put this in /usr/local/bin/fsharpi on my mac:

#!/usr/bin/env bash
dotnet fsi

EDIT: Just found the “Use Sdk Scripts: Use 'dotnet fsi' instead of 'fsi.exe'/'fsharpi'” checkbox. It works!