launch.json

// A launch configuration that compiles the extension and then opens it inside a new window
{
	"version": "0.2.0",
	"configurations": [
		{
			"type": "extensionHost",
			"request": "launch",
			"name": "Launch Client",
			"runtimeExecutable": "${execPath}",
			"args": ["--extensionDevelopmentPath=${workspaceRoot}/lsp/client-extension"],
			"outFiles": ["${workspaceRoot}/lsp/client-extension/out/**/*.js"],
			"preLaunchTask": "make server",
			"localRoot":  "${workspaceFolder}/lsp/client-extension"
		},
		{
			"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"]
		},

		{
			"type": "lldb",
			"request": "attach",
			"name": "Attach to Server",
			"program": "${workspaceFolder}/target/debug/nls"
		}
		
	],
	"compounds": [
		{
			"name": "Client + Server",
			"configurations": ["Launch Client", "Attach to Server"]
		}
	]
}