Add flag to install an extension from the command line (#504)

packages/server/src/cli.ts

 import { field, logger } from "@coder/logger";
 import { ServerMessage, SharedProcessActive } from "@coder/protocol/src/proto";
-import { ChildProcess, fork, ForkOptions, spawn } from "child_process";
+import { ChildProcess, fork, ForkOptions } from "child_process";
 import { randomFillSync } from "crypto";
 import * as fs from "fs";
 import * as fse from "fs-extra";
@@ -29,6 +29,7 @@ commander.version(process.env.VERSION || "development")
 	.option("-N, --no-auth", "Start without requiring authentication.", undefined)
 	.option("-H, --allow-http", "Allow http connections.", false)
 	.option("-P, --password <value>", "Specify a password for authentication.")
+	.option("--install-extension <value>", "Install an extension by its ID.")
 	.option("--bootstrap-fork <name>", "Used for development. Never set.")
 	.option("--extra-args <args>", "Used for development. Never set.")
 	.arguments("Specify working directory.")
@@ -61,6 +62,8 @@ const bold = (text: string | number): string | number => {
 		readonly cert?: string;
 		readonly certKey?: string;
 
+		readonly installExtension?: string;
+
 		readonly bootstrapFork?: string;
 		readonly extraArgs?: string;
 	};
@@ -112,11 +115,11 @@ const bold = (text: string | number): string | number => {
 			process.exit(1);
 		}
 
-		((options.extraArgs ? JSON.parse(options.extraArgs) : []) as string[]).forEach((arg, i) => {
-			// [0] contains the binary running the script (`node` for example) and
-			// [1] contains the script name, so the arguments come after that.
-			process.argv[i + 2] = arg;
-		});
+		process.argv = [
+			process.argv[0],
+			process.argv[1],
+			...(options.extraArgs ? JSON.parse(options.extraArgs) : []),
+		];
 
 		return requireModule(modulePath, builtInExtensionsDir);
 	}
@@ -162,6 +165,26 @@ const bold = (text: string | number): string | number => {
 		logger.warn('"--data-dir" is deprecated. Use "--user-data-dir" instead.');
 	}
 
+	if (options.installExtension) {
+		const fork = forkModule("vs/code/node/cli", [
+			"--user-data-dir", dataDir,
+			"--builtin-extensions-dir", builtInExtensionsDir,
+			"--extensions-dir", extensionsDir,
+			"--install-extension", options.installExtension,
+		], {
+			env: {
+				VSCODE_ALLOW_IO: "true",
+				VSCODE_LOGS: process.env.VSCODE_LOGS,
+			},
+		}, dataDir);
+
+		fork.stdout.on("data", (d: Buffer) => d.toString().split("\n").forEach((l) => logger.info(l)));
+		fork.stderr.on("data", (d: Buffer) => d.toString().split("\n").forEach((l) => logger.error(l)));
+		fork.on("exit", () => process.exit());
+
+		return;
+	}
+
 	// TODO: fill in appropriate doc url
 	logger.info("Additional documentation: http://github.com/codercom/code-server");
 	logger.info("Initializing", field("data-dir", dataDir), field("extensions-dir", extensionsDir), field("working-dir", workingDir), field("log-dir", logDir));

packages/server/src/vscode/bootstrapFork.ts

@@ -82,7 +82,6 @@ export const requireModule = (modulePath: string, builtInExtensionsDir: string):
  * @param modulePath Path of the VS Code module to load.
  */
 export const forkModule = (modulePath: string, args?: string[], options?: cp.ForkOptions, dataDir?: string): cp.ChildProcess => {
-	let proc: cp.ChildProcess;
 	const forkOptions: cp.ForkOptions = {
 		stdio: [null, null, null, "ipc"],
 	};
@@ -91,18 +90,27 @@ export const forkModule = (modulePath: string, args?: string[], options?: cp.For
 		delete options.env.ELECTRON_RUN_AS_NODE;
 		forkOptions.env = options.env;
 	}
+
 	const forkArgs = ["--bootstrap-fork", modulePath];
 	if (args) {
 		forkArgs.push("--extra-args", JSON.stringify(args));
 	}
 	if (dataDir) {
-		forkArgs.push("--data-dir", dataDir);
+		forkArgs.push("--user-data-dir", dataDir);
 	}
+
+	const nodeArgs = [];
 	if (isCli) {
-		proc = cp.spawn(process.execPath, [path.join(buildDir, "out", "cli.js"), ...forkArgs], forkOptions);
+		nodeArgs.push(path.join(buildDir, "out", "cli.js"));
 	} else {
-		proc = cp.spawn(process.execPath, ["--require", "ts-node/register", "--require", "tsconfig-paths/register", process.argv[1], ...forkArgs], forkOptions);
+		nodeArgs.push(
+			"--require", "ts-node/register",
+			"--require", "tsconfig-paths/register",
+			process.argv[1],
+		);
 	}
+
+	const proc = cp.spawn(process.execPath, [...nodeArgs, ...forkArgs], forkOptions);
 	if (args && args[0] === "--type=watcherService" && os.platform() === "linux") {
 		cp.exec(`renice -n 19 -p ${proc.pid}`, (error) => {
 			if (error) {

packages/vscode/src/fill/environmentService.ts

-import * as path from "path";
 import * as paths from "./paths";
 import * as environment from "vs/platform/environment/node/environmentService";
 
+/**
+ * Customize paths using data received from the initialization message.
+ */
 export class EnvironmentService extends environment.EnvironmentService {
 	public get sharedIPCHandle(): string {
 		return paths.getSocketPath() || super.sharedIPCHandle;

packages/vscode/webpack.bootstrap.config.js

@@ -60,7 +60,7 @@ module.exports = merge(
 				"native-keymap": path.join(vsFills, "native-keymap.ts"),
 				"native-watchdog": path.join(vsFills, "native-watchdog.ts"),
 				"vs/base/common/amd": path.resolve(vsFills, "amd.ts"),
-				"vs/base/node/paths": path.resolve(vsFills, "paths.ts"),
+				"vs/base/node/paths": path.join(vsFills, "paths.ts"),
 				"vs/platform/product/node/package": path.resolve(vsFills, "package.ts"),
 				"vs/platform/product/node/product": path.resolve(vsFills, "product.ts"),
 				"vs/base/node/zip": path.resolve(vsFills, "zip.ts"),

scripts/vscode.patch

@@ -158,6 +158,14 @@ index 6fd8249..04c0933 100644
 +	backupMainService.initialize().catch(console.error);
 @@ -223,0 +236 @@ async function handshake(configuration: ISharedProcessConfiguration): Promise<vo
 +startup({ machineId: "1" });
+diff --git a/src/vs/code/node/cli.ts b/src/vs/code/node/cli.ts
+index 1f8b17a..2a875f9 100644
+--- a/src/vs/code/node/cli.ts
++++ b/src/vs/code/node/cli.ts
+@@ -43,0 +44,3 @@ export async function main(argv: string[]): Promise<any> {
++	const cli = await new Promise<IMainCli>((c, e) => require(['vs/code/node/cliProcessMain'], c, e));
++	await cli.main(args);
++	return; // Always just do this for now.
 diff --git a/src/vs/editor/browser/config/configuration.ts b/src/vs/editor/browser/config/configuration.ts
 index f97a692..0206957 100644
 --- a/src/vs/editor/browser/config/configuration.ts