Debug Adapter Protocol lib

[TylerLeonhardt]

Hi all 👋

The PowerShell language server will start making the transition to using the csharp-language-server-protocol project for the LSP message handling!

If you have any concerns about this, please let me know but I was wondering if there was a DAP implementation in C# that’s recommended to go along side this project.

Any thoughts?

• protocol types
• extensible launch and attach
• DebugServer type
• DebugClient type

[david-driscoll]

I have not sat down to start work on a lib for the debug stuff, but it's something we could probably do fairly easily, I think they're both JsonRpc based iirc.

[TylerLeonhardt]

@david-driscoll If you folks can do the underlying work of giving me the ability to mark a message as “LSP or DAP” I can help csharp-language-server-protocol by creating most/all of the message interfaces & param types.

[TylerLeonhardt]

cc @mholo65

[TylerLeonhardt]

This is technically done... but it would be nice to have a formal DebugServer type similar to LanguageServer. It doesn't have to be too fancy, but ideally it would handle stuff like initialize cancel.

[TylerLeonhardt]

Additionally, a DebugClient offering similar things to LanguageClient would be awesome.

cc @tintoy who has done great work on the LanguageClient

[david-driscoll]

Getting a DebugServer is next on my list... we can basically just steal the code you worked on it get things working! 👍

[TylerLeonhardt]

More or less. There's a ton of PSES specific code in there but it could be used as an example along with LanguageServer

[TylerLeonhardt]

Oh I forgot to mention... For the launch and attach request, I had to make own handlers because we add more properties to the launch.json.

Ex. Attach to process:

        {
                name: "PowerShell: Attach to PowerShell Host Process",
                type: "PowerShell",
                request: "attach",
                runspaceId: 1,
            }

Note the runspaceId.

So one other thing this needs is extensible launch/attach requests.

[TylerLeonhardt]

@tintoy I remember in Slack you said you had a DebugClient ready for me to try. Is that true?

[tintoy]

On my own branch yeah - it should be enough to get you started at least :)

https://github.com/tintoy/csharp-language-server-protocol/tree/feature/dap/client?files=1

[david-driscoll]

I think we have these now!