Parse args sent through evaluation function

Previously they'd go in still stringified so we didn't get a chance to
convert buffer objects back to buffers, for example, making things like
`fs.write` write `[object Object]` to files.

packages/ide/test/fs.test.ts

@@ -11,7 +11,7 @@ const fs = require("../src/fill/fs") as typeof import("fs");
 
 describe("fs", () => {
 	let i = 0;
-	const coderDir = path.join(os.tmpdir(), "coder");
+	const coderDir = path.join(os.tmpdir(), "coder", "fs");
 	const testFile = path.join(__dirname, "fs.test.ts");
 	const tmpFile = (): string => path.join(coderDir, `${i++}`);
 	const createTmpFile = async (): Promise<string> => {
@@ -22,6 +22,13 @@ describe("fs", () => {
 	};
 
 	beforeAll(async () => {
+		try {
+			await util.promisify(nativeFs.mkdir)(path.dirname(coderDir));
+		} catch (error) {
+			if (error.code !== "EEXIST") {
+				throw error;
+			}
+		}
 		await util.promisify(rimraf)(coderDir);
 		await util.promisify(nativeFs.mkdir)(coderDir);
 	});
@@ -332,7 +339,7 @@ describe("fs", () => {
 	describe("mkdtemp", () => {
 		it("should create temp dir", async () => {
 			await expect(util.promisify(fs.mkdtemp)(coderDir + "/"))
-				.resolves.toMatch(/^\/tmp\/coder\/[a-zA-Z0-9]{6}/);
+				.resolves.toMatch(/^\/tmp\/coder\/fs\/[a-zA-Z0-9]{6}/);
 		});
 	});
 

packages/ide/test/net.test.ts

@@ -12,10 +12,17 @@ const net = require("../src/fill/net") as typeof import("net");
 
 describe("net", () => {
 	let i = 0;
-	const coderDir = path.join(os.tmpdir(), "coder");
+	const coderDir = path.join(os.tmpdir(), "coder", "net");
 	const tmpFile = (): string => path.join(coderDir, `socket.${i++}`);
 
 	beforeAll(async () => {
+		try {
+			await util.promisify(fs.mkdir)(path.dirname(coderDir));
+		} catch (error) {
+			if (error.code !== "EEXIST") {
+				throw error;
+			}
+		}
 		await util.promisify(rimraf)(coderDir);
 		await util.promisify(fs.mkdir)(coderDir);
 	});

packages/protocol/src/browser/client.ts

@@ -4,7 +4,7 @@ import { logger, field } from "@coder/logger";
 import { ReadWriteConnection, InitData, OperatingSystem, SharedProcessData } from "../common/connection";
 import { Disposer, stringify, parse } from "../common/util";
 import { NewEvalMessage, ServerMessage, EvalDoneMessage, EvalFailedMessage, ClientMessage, WorkingInitMessage, EvalEventMessage } from "../proto";
-import { ActiveEval } from "./command";
+import { ActiveEval } from "./evaluate";
 
 /**
  * Client accepts an arbitrary connection intended to communicate with the Server.

packages/protocol/src/node/evaluate.ts

@@ -12,11 +12,6 @@ export interface ActiveEvaluation {
 
 declare var __non_webpack_require__: typeof require;
 export const evaluate = (connection: SendableConnection, message: NewEvalMessage, onDispose: () => void): ActiveEvaluation | void => {
-	const argStr: string[] = [];
-	message.getArgsList().forEach((value) => {
-		argStr.push(value);
-	});
-
 	/**
 	 * Send the response and call onDispose.
 	 */
@@ -94,11 +89,12 @@ export const evaluate = (connection: SendableConnection, message: NewEvalMessage
 		process: {
 			env: process.env,
 		},
+		args: message.getArgsList().map(parse),
 	};
 
 	let value: any; // tslint:disable-line no-any
 	try {
-		const code = `(${message.getFunction()})(${eventEmitter ? "eventEmitter, " : ""}${argStr.join(",")});`;
+		const code = `(${message.getFunction()})(${eventEmitter ? "eventEmitter, " : ""}...args);`;
 		value = vm.runInNewContext(code, sandbox, {
 			// If the code takes longer than this to return, it is killed and throws.
 			timeout: message.getTimeout() || 15000,