cli: Add --disable-update-check flag

Closes #2361

src/node/cli.ts

@@ -33,6 +33,7 @@ export interface Args extends VsArgs {
   "cert-host"?: string
   "cert-key"?: string
   "disable-telemetry"?: boolean
+  "disable-update-check"?: boolean
   help?: boolean
   host?: string
   json?: boolean
@@ -114,6 +115,12 @@ const options: Options<Required<Args>> = {
   },
   "cert-key": { type: "string", path: true, description: "Path to certificate key when using non-generated cert." },
   "disable-telemetry": { type: "boolean", description: "Disable telemetry." },
+  "disable-update-check": {
+    type: "boolean",
+    description:
+      "Disable update check. Without this flag, code-server checks every 6 hours against the latest github release and \n" +
+      "then notifies you once every week that a new release is available.",
+  },
   help: { type: "boolean", short: "h", description: "Show this output." },
   json: { type: "boolean" },
   open: { type: "boolean", description: "Open in browser on startup. Does not work remotely." },

src/node/routes/vscode.ts

@@ -42,6 +42,7 @@ router.get("/", async (req, res) => {
       commit !== "development" ? content.replace(/<!-- PROD_ONLY/g, "").replace(/END_PROD_ONLY -->/g, "") : content,
       {
         disableTelemetry: !!req.args["disable-telemetry"],
+        disableUpdateCheck: !!req.args["disable-update-check"],
       },
     )
       .replace(`"{{REMOTE_USER_DATA_URI}}"`, `'${JSON.stringify(options.remoteUserDataUri)}'`)