lsp-sample does not work

[sgpinkus]

Extension sample

lsp-sample

VS Code version

1.97.2

What went wrong?

Followed instructions in README. I don't get any diagnostics or autocomplete when debugging "Launch Client" config.

[dbaeumer]

I see the errors:

[dbaeumer]

I also see the code completion

Please note that the code completion works on a whitespace or if the word starts with TypeScript or JavaScript since these are the returned completions.

[dbaeumer]

Any additional input you can provide why this is not working for you.

[sgpinkus]

Thanks for your prompt response. I just cloned the repo npm install; npm compile then tried to run debugger. The other "Language Server E2E Test" run configuration does work and I see the diagnostics squiggle underlines when the editor briefly pops up.

Ill keep trying to figure it out when I get a chance.

[sgpinkus]

I randomly figured out how to make this example work. To debug what was going on I added some logging from the server but apparently in vscode you need to run a separate "Attach" launch configuration to read logs from the server ... So I did that. As soon as I started this extra launch config the server started working. Before attached the "Language Server Example" output channel (I guess such a channel is created by default for each extension?) says:

Debugger listening on ws://127.0.0.1:6009/b692694c-8bf9-4206-9633-03ae961d7d06
For help, see: https://nodejs.org/en/docs/inspector

Looks like it's hanging waiting for a connection. Ne launch config:

// A launch configuration that compiles the extension and then opens it inside a new window
{
	"version": "0.2.0",
	"configurations": [
		{
			"name": "Attach",
			"port": 6009,
			"request": "attach",
			"skipFiles": [
				"<node_internals>/**"
			],
			"type": "node"
		},
		{
			"type": "extensionHost",
			"request": "launch",
			"name": "Launch Client",
			"runtimeExecutable": "${execPath}",
			"args": [
				"--extensionDevelopmentPath=${workspaceRoot}",
				"${workspaceRoot}/client/testFixture"
			],
			"outFiles": [
				"${workspaceRoot}/client/out/**/*.js",
				"${workspaceRoot}/server/out/**/*.js"
			],
			"autoAttachChildProcesses": true,
			"preLaunchTask": {
				"type": "npm",
				"script": "watch"
			},
		},
		{
			"name": "Language Server E2E Test",
			"type": "extensionHost",
			"request": "launch",
			"runtimeExecutable": "${execPath}",
			"args": [
				"--extensionDevelopmentPath=${workspaceRoot}",
				"--extensionTestsPath=${workspaceRoot}/client/out/test/index",
				"${workspaceRoot}/client/testFixture"
			],
			"outFiles": [
				"${workspaceRoot}/client/out/test/**/*.js"
			]
		}
	],
	"compounds": [
		{
			"name": "Launch Client Attached",
			"configurations": [
				"Launch Client",
				"Attach",
			],
			"stopAll": true
		}
	]
}