Refactor evaluations (#285)

* Replace evaluations with proxies and messages

* Return proxies synchronously

Otherwise events can be lost.

* Ensure events cannot be missed

* Refactor remaining fills

* Use more up-to-date version of util

For callbackify.

* Wait for dispose to come back before removing

This prevents issues with the "done" event not always being the last
event fired. For example a socket might close and then end, but only
if the caller called end.

* Remove old node-pty tests

* Fix emitting events twice on duplex streams

* Preserve environment when spawning processes

* Throw a better error if the proxy doesn't exist

* Remove rimraf dependency from ide

* Update net.Server.listening

* Use exit event instead of killed

Doesn't look like killed is even a thing.

* Add response timeout to server

* Fix trash

* Require node-pty & spdlog after they get unpackaged

This fixes an error when running in the binary.

* Fix errors in down emitter preventing reconnecting

* Fix disposing proxies when nothing listens to "error" event

* Refactor event tests to use jest.fn()

* Reject proxy call when disconnected

Otherwise it'll wait for the timeout which is a waste of time since we
already know the connection is dead.

* Use nbin for binary packaging

* Remove additional module requires

* Attempt to remove require for local bootstrap-fork

* Externalize fsevents

packages/protocol/src/node/modules/node-pty.ts

@@ -0,0 +1,75 @@
+/// <reference path="../../../../../lib/vscode/src/typings/node-pty.d.ts" />
+import { EventEmitter } from "events";
+import * as pty from "node-pty";
+import { ServerProxy } from "../../common/proxy";
+import { preserveEnv } from "../../common/util";
+
+/**
+ * Server-side IPty proxy.
+ */
+export class NodePtyProcessProxy implements ServerProxy {
+	private readonly emitter = new EventEmitter();
+
+	public constructor(private readonly process: pty.IPty) {
+		let name = process.process;
+		setTimeout(() => { // Need to wait for the caller to listen to the event.
+			this.emitter.emit("process", name);
+		}, 1);
+		const timer = setInterval(() => {
+			if (process.process !== name) {
+				name = process.process;
+				this.emitter.emit("process", name);
+			}
+		}, 200);
+
+		this.onDone(() => clearInterval(timer));
+	}
+
+	public async getPid(): Promise<number> {
+		return this.process.pid;
+	}
+
+	public async getProcess(): Promise<string> {
+		return this.process.process;
+	}
+
+	public async kill(signal?: string): Promise<void> {
+		this.process.kill(signal);
+	}
+
+	public async resize(columns: number, rows: number): Promise<void> {
+		this.process.resize(columns, rows);
+	}
+
+	public async write(data: string): Promise<void> {
+		this.process.write(data);
+	}
+
+	public async onDone(cb: () => void): Promise<void> {
+		this.process.on("exit", cb);
+	}
+
+	public async dispose(): Promise<void> {
+		this.kill();
+		setTimeout(() => this.kill("SIGKILL"), 5000); // Double tap.
+		this.emitter.removeAllListeners();
+	}
+
+	// tslint:disable-next-line no-any
+	public async onEvent(cb: (event: string, ...args: any[]) => void): Promise<void> {
+		this.emitter.on("process", (process) => cb("process", process));
+		this.process.on("data", (data) => cb("data", data));
+		this.process.on("exit", (exitCode, signal) => cb("exit", exitCode, signal));
+	}
+}
+
+/**
+ * Server-side node-pty proxy.
+ */
+export class NodePtyModuleProxy {
+	public async spawn(file: string, args: string[] | string, options: pty.IPtyForkOptions): Promise<NodePtyProcessProxy> {
+		preserveEnv(options);
+
+		return new NodePtyProcessProxy(require("node-pty").spawn(file, args, options));
+	}
+}