fix(linux): DevTools URL with the inspector's target id

The runtime only upgrades ws://127.0.0.1:<port>/<id> now; the id comes
from /json/list (older runtimes without one keep the bare URL).

Author: triniwiz

lib/services/linux-device-debug-service.ts

@@ -1,3 +1,4 @@
+import * as http from "http";
 import * as net from "net";
 import { sleep } from "../common/helpers";
 import { performanceLog } from "../common/decorators";
@@ -48,10 +49,37 @@ export class LinuxDeviceDebugService
 			);
 		}
 		this.$logger.info("# NativeScript Debugger started #");
-		result.debugUrl = this.getChromeDebugUrl(debugOptions, port);
+		// the runtime only upgrades its (random) target path
+		const target = await this.targetPath(port);
+		result.debugUrl =
+			this.getChromeDebugUrl(debugOptions, port) + (target ?? "");
 		return result;
 	}
 
+	/** `/<id>` of the inspector's target, from `/json/list`. */
+	private targetPath(port: number): Promise<string | null> {
+		return new Promise((resolve) => {
+			const request = http.get(
+				{ host: "127.0.0.1", port, path: "/json/list", timeout: 2000 },
+				(response) => {
+					let body = "";
+					response.setEncoding("utf8");
+					response.on("data", (chunk) => (body += chunk));
+					response.on("end", () => {
+						try {
+							const url = new URL(JSON.parse(body)[0].webSocketDebuggerUrl);
+							resolve(url.pathname.length > 1 ? url.pathname : null);
+						} catch {
+							resolve(null);
+						}
+					});
+				},
+			);
+			request.on("timeout", () => request.destroy());
+			request.on("error", () => resolve(null));
+		});
+	}
+
 	public async debugStop(): Promise<void> {
 		// the inspector lives in the app process
 	}

test/services/linux-device-debug-service.ts

@@ -1,3 +1,4 @@
+import * as http from "http";
 import * as net from "net";
 import { assert } from "chai";
 import { LinuxDeviceDebugService } from "../../lib/services/linux-device-debug-service";
@@ -48,6 +49,32 @@ describe("linuxDeviceDebugService", () => {
 		}
 	});
 
+	it("adds the inspector's target id to the DevTools URL", async () => {
+		const id = "fe0f450d-2279-686c-661a-6024bea0f5f0";
+		const server = http.createServer((_request, response) => {
+			response.end(
+				JSON.stringify([
+					{ webSocketDebuggerUrl: `ws://127.0.0.1:${port}/${id}` },
+				]),
+			);
+		});
+		await new Promise<void>((resolve) =>
+			server.listen(0, "127.0.0.1", resolve),
+		);
+		const port = (<net.AddressInfo>server.address()).port;
+		try {
+			const result = await createService(port).debug(debugData, {
+				timeout: "2",
+			});
+			assert.equal(
+				result.debugUrl,
+				`devtools://devtools/bundled/inspector.html?ws=127.0.0.1:${port}/${id}`,
+			);
+		} finally {
+			server.close();
+		}
+	});
+
 	it("fails when nothing listens on the inspector port", async () => {
 		const server = await listen();
 		const port = (<net.AddressInfo>server.address()).port;