Added multi server LSP example

multi-lsp-sample/.gitignore

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+out
+node_modules
+client/server

multi-lsp-sample/client/.vscode/launch.json

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+// A launch configuration that compiles the extension and then opens it inside a new window
+{
+	"version": "0.1.0",
+	"configurations": [
+		{
+			"name": "Launch Extension",
+			"type": "extensionHost",
+			"request": "launch",
+			"runtimeExecutable": "${execPath}",
+			"args": ["--extensionDevelopmentPath=${workspaceRoot}" ],
+			"stopOnEntry": false,
+			"sourceMaps": true,
+			"outFiles": ["${workspaceRoot}/out/**/*.js"],
+			"preLaunchTask": "npm: watch"
+		}
+	]
+}

multi-lsp-sample/client/.vscode/settings.json

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+// Place your settings in this file to overwrite default and user settings.
+{
+	"files.exclude": {
+		"out": false // set this to true to hide the "out" folder with the compiled JS files
+	},
+	"search.exclude": {
+		"out": true
+	},
+	"editor.insertSpaces": false,
+	"editor.tabSize": 4,
+	"typescript.tsdk": "./node_modules/typescript/lib", "testbed.trace.server": "verbose"
+	, "testbed.server.trace": "verbose"
+}

multi-lsp-sample/client/.vscode/tasks.json

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+{
+	"version": "2.0.0",
+	"tasks": [
+		{
+			"type": "npm",
+			"script": "watch",
+			"isBackground": true,
+			"problemMatcher": [
+				"$tsc-watch"
+			],
+			"group": {
+				"kind": "build",
+				"isDefault": true
+			}
+		}
+	]
+}

multi-lsp-sample/client/.vscodeignore

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+.vscode/**
+typings/**
+**/*.ts
+**/*.map
+.gitignore
+tsconfig.json
+vsc-extension-quickstart.md

multi-lsp-sample/client/extension.ts

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+import * as path from 'path';
+import { 
+	workspace as Workspace, window as Window, ExtensionContext, TextDocument, OutputChannel
+} from 'vscode'; 
+
+import { 
+	LanguageClient, LanguageClientOptions, TransportKind, ProposedProtocol
+} from 'vscode-languageclient';
+
+let defaultClient: LanguageClient;
+let clients: Map<string, LanguageClient> = new Map();
+
+export function activate(_context: ExtensionContext) {
+
+
+	let module = path.join(__dirname, '..', 'server', 'server.js');
+	let outputChannel: OutputChannel = Window.createOutputChannel('Multi-LSP-Example');
+	
+	function didOpenTextDocument(document: TextDocument): void {
+		// We are only interested in language mode text
+		if (document.languageId !== 'plaintext' || (document.uri.scheme !== 'file' && document.uri.scheme !== 'untitled')) {
+			return;
+		}
+
+		let uri = document.uri;
+		// Untitled files go to a default client.
+		if (uri.scheme === 'untitled' && !defaultClient) {
+			let debugOptions = { execArgv: ["--nolazy", "--inspect=6010"] };
+			let serverOptions = {
+				run: { module, transport: TransportKind.ipc },
+				debug: { module, transport: TransportKind.ipc, options: debugOptions}
+			};
+			let clientOptions: LanguageClientOptions = {
+				documentSelector: [
+					{ scheme: 'untitled', language: 'plaintext' }
+				],
+				synchronize: {
+					configurationSection: 'multi-lsp'
+				},
+				diagnosticCollectionName: 'multi-lsp',
+				outputChannel: outputChannel
+			}
+			defaultClient = new LanguageClient('multi-lsp', 'Multi-LSP', serverOptions, clientOptions);
+			defaultClient.registerFeatures(ProposedProtocol(defaultClient));
+			defaultClient.start();
+		}
+		let folder = Workspace.getWorkspaceFolder(uri);
+		// Files outside a folder can't be handled. This might depend on the language
+		// Single file languages like JSON might handle files outside the workspace folders.
+		if (!folder) {
+			return;
+		}
+		if (!clients.has(folder.uri.toString())) {
+			let debugOptions = { execArgv: ["--nolazy", `--inspect=${6011 + clients.size}`] };
+			let serverOptions = {
+				run: { module, transport: TransportKind.ipc },
+				debug: { module, transport: TransportKind.ipc, options: debugOptions}
+			};
+			let clientOptions: LanguageClientOptions = {
+				documentSelector: [
+					{ scheme: 'file', language: 'plaintext', pattern: `${folder.uri.fsPath}/**/*` }
+				],
+				synchronize: {
+					configurationSection: 'multi-lsp'
+				},
+				diagnosticCollectionName: 'multi-lsp',
+				workspaceFolder: folder,
+				outputChannel: outputChannel
+			}
+			let client = new LanguageClient('multi-lsp', 'Multi-LSP', serverOptions, clientOptions);
+			client.registerFeatures(ProposedProtocol(client));
+			client.start();
+			clients.set(folder.uri.toString(), client);
+
+		}
+	}
+
+	Workspace.onDidOpenTextDocument(didOpenTextDocument);
+	Workspace.textDocuments.forEach(didOpenTextDocument);
+	Workspace.onDidChangeWorkspaceFolders((event) => {
+		for (let folder  of event.removed) {
+			let client = clients.get(folder.uri.toString());
+			if (client) {
+				clients.delete(folder.uri.toString());
+				client.stop();
+			}
+		}
+	});
+}
+
+export function deactivate(): Thenable<void> {
+	let promises: Thenable<void>[] = [];
+	if (defaultClient) {
+		promises.push(defaultClient.stop());
+	}
+	for (let client of clients.values()) {
+		promises.push(client.stop());
+	}
+	return Promise.all(promises).then(() => undefined);
+}

multi-lsp-sample/client/package.json

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+{
+	"name": "multi-lsp",
+	"description": "Example showing multiple LSP servers running",
+	"version": "0.0.1",
+	"publisher": "vscode",
+	"engines": {
+		"vscode": "^1.15.0"
+	},
+	"activationEvents": [
+		"onLanguage:plaintext"
+	],
+	"contributes": {
+		"configuration": {
+			"type": "object",
+			"title": "Multi LSP configuration",
+			"properties": {
+				"multi-lsp.enable": {
+					"scope": "resource",
+					"type": "boolean",
+					"default": true,
+					"description": "Controls the enablement."
+				},
+				"multi-lsp.options": {
+					"scope": "resource",
+					"type": "object",
+					"default": {},
+					"description": "Additional options."
+				}
+			}
+		}
+	},
+	"main": "./out/extension",
+	"scripts": {
+		"vscode:prepublish": "node ./node_modules/vscode/bin/compile",
+		"watch": "tsc -watch -p ./",
+		"update-vscode": "node ./node_modules/vscode/bin/install"
+	},
+	"devDependencies": {
+		"vscode": "^1.1.5",
+		"typescript": "^2.4.2",
+		"@types/node": "^6.0.87"
+	},
+	"dependencies": {
+		"vscode-languageclient": "next"
+	}
+}

multi-lsp-sample/client/tsconfig.json

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+{
+	"compilerOptions": {
+		"noUnusedLocals": true,
+		"noUnusedParameters": true,
+		"noImplicitAny": true,
+		"noImplicitReturns": true,		
+		"module": "commonjs",
+		"target": "es6",
+		"outDir": "out",
+		"lib": [ "es6"],
+		"sourceMap": true
+	},
+	"exclude": [
+		"node_modules",
+		"server"
+	]
+}

multi-lsp-sample/server/.vscode/launch.json

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+{
+	"version": "0.1.0",
+	// List of configurations. Add new configurations or edit existing ones.
+	"configurations": [
+		{
+			"name": "Attach",
+			"type": "node",
+			"request": "attach",
+			// TCP/IP address. Default is "localhost".
+			"address": "localhost",
+			// Port to attach to.
+			"port": 6012,
+			"protocol": "inspector",
+			"sourceMaps": false,
+			"outDir": "${workspaceRoot}/../testbed/server"
+		}
+	]
+}

multi-lsp-sample/server/.vscode/settings.json

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+// Place your settings in this file to overwrite default and user settings.
+{
+	"javascript.validate.enable": false,
+	"files.trimTrailingWhitespace": true,
+	"editor.insertSpaces": false,
+	"editor.tabSize": 4,
+	"typescript.tsdk": "./node_modules/typescript/lib"
+}

multi-lsp-sample/server/.vscode/tasks.json

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+{
+	"version": "2.0.0",
+	"tasks": [
+		{
+			"type": "npm",
+			"script": "watch",
+			"isBackground": true,
+			"problemMatcher": [
+				"$tsc-watch"
+			],
+			"group": {
+				"kind": "build",
+				"isDefault": true
+			}
+		}
+	]
+}

multi-lsp-sample/server/package.json

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+{
+	"name": "multi-lsp-server",
+	"version": "0.1.0",
+	"description": "Multi server example",
+	"engines": {
+		"node": "*"
+	},
+	"private": true,
+	"main": "./lib/server.js",
+	"dependencies": {
+		"vscode-languageserver": "next"
+	},
+	"devDependencies": {
+		"typescript": "^2.4.2",
+		"@types/node": "^6.0.87"
+	},
+	"scripts": {
+		"compile": "installServerIntoExtension ../client ./package.json ./src/tsconfig.json && tsc -p ./src",
+		"watch": "installServerIntoExtension ../client ./package.json ./src/tsconfig.json && tsc --watch -p ./src"
+	}
+}

multi-lsp-sample/server/src/server.ts

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+/*---------------------------------------------------------
+ * Copyright (C) Microsoft Corporation. All rights reserved.
+ *--------------------------------------------------------*/
+'use strict';
+
+import {
+	createConnection, TextDocuments, ProposedProtocol, TextDocumentSyncKind
+} from 'vscode-languageserver';
+
+let connection = createConnection(ProposedProtocol);
+let documents = new TextDocuments();
+let rootUri: string;
+
+documents.onDidOpen((event) => {
+	connection.console.log(`[Server ${rootUri}] Document opened: ${event.document.uri}`);
+})
+documents.listen(connection);
+
+connection.onInitialize((params) => {
+	rootUri = params.rootUri;
+	connection.console.log(`Server started for folder: ${rootUri}`);
+	return {
+		capabilities: {
+			textDocumentSync: {
+				openClose: true,
+				change: TextDocumentSyncKind.None
+			}
+		}
+	}
+});
+connection.listen();

multi-lsp-sample/server/src/tsconfig.json

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+{
+	"compilerOptions": {
+		"noUnusedLocals": true,
+		"noUnusedParameters": true,
+		"noImplicitAny": true,
+		"noImplicitReturns": true,
+		"module": "commonjs",
+		"moduleResolution": "node",
+		"target": "es6",
+		"lib": ["es6"],
+		"sourceMap": true,
+		"outDir": "../../client/server"
+	},
+	"exclude": [
+		"node_modules"
+	]
+}