Handle upgrade from binary to loose files

As best we can, anyway.

src/node/wrapper.ts

@@ -1,5 +1,7 @@
 import { logger, field } from "@coder/logger"
 import * as cp from "child_process"
+import * as fs from "fs-extra"
+import * as path from "path"
 import { Emitter } from "../common/emitter"
 
 interface HandshakeMessage {
@@ -175,9 +177,9 @@ export class WrapperProcess {
 
   public start(): Promise<void> {
     if (!this.started) {
-      const child = this.spawn()
+      this.started = this.spawn().then((child) => {
         logger.debug(`spawned inner process ${child.pid}`)
-      this.started = ipcMain()
+        ipcMain()
           .handshake(child)
           .then(() => {
             child.once("exit", (code) => {
@@ -186,29 +188,42 @@ export class WrapperProcess {
             })
           })
         this.process = child
+      })
     }
     return this.started
   }
 
-  private spawn(): cp.ChildProcess {
+  private async spawn(): Promise<cp.ChildProcess> {
     // Flags to pass along to the Node binary.
     let nodeOptions = `${process.env.NODE_OPTIONS || ""} ${(this.options && this.options.nodeOptions) || ""}`
     if (!/max_old_space_size=(\d+)/g.exec(nodeOptions)) {
       nodeOptions += ` --max_old_space_size=${(this.options && this.options.maxMemory) || 2048}`
     }
 
-    return cp.fork(process.argv[1], process.argv.slice(2), {
+    // This is to handle the upgrade from binary release to loose release. This
+    // will only work for users that restart code-server entirely between
+    // upgrading to this version and the loose file version since this is the
+    // wrapper code that does not get updated. The hope is that it'll be likely
+    // for that to happen to most users in that timeframe to minimize disruption
+    // when loose files are release. This can be removed with that release.
+    const bundledNodePath = path.join(process.argv[0], "node")
+    const binary = (await fs.pathExists(bundledNodePath)) ? bundledNodePath : process.argv[0]
+
+    // Use spawn (instead of fork) to use the new binary in case it was updated.
+    return cp.spawn(binary, process.argv.slice(1), {
       env: {
         ...process.env,
         CODE_SERVER_PARENT_PID: process.pid.toString(),
         NODE_OPTIONS: nodeOptions,
+        NBIN_BYPASS: undefined,
       },
+      stdio: ["inherit", "inherit", "inherit", "ipc"],
     })
   }
 }
 
-// // It's possible that the pipe has closed (for example if you run code-server
-// // --version | head -1). Assume that means we're done.
+// It's possible that the pipe has closed (for example if you run code-server
+// --version | head -1). Assume that means we're done.
 if (!process.stdout.isTTY) {
   process.stdout.on("error", () => ipcMain().exit())
 }