Start of CLI version checking from VSCE

firebase-vscode/src/extension.ts

@@ -1,4 +1,6 @@
 import * as vscode from "vscode";
+import { spawnSync } from 'child_process';
+import * as semver from "semver";
 
 import { ExtensionBroker } from "./extension-broker";
 import { createBroker } from "../common/messaging/broker";
@@ -42,6 +44,8 @@
     });
   }
 
+  await checkCLIInstallation();
+
   // log start event for session tracking
   analyticsLogger.logger.logUsage(DATA_CONNECT_EVENT_NAME.EXTENSION_START);
 
@@ -68,3 +72,39 @@
     ),
   );
 }
+
+async function checkCLIInstallation(): Promise<void> {
+  // This should never error out - it must be best effort.
+  let message = "";
+  try {
+    // Fetch directly so that we don't need to rely on any tools being presnt on path.
+    const latestVersionRes = await fetch("https://registry.npmjs.org/firebase-tools");
+    const latestVersion = (await latestVersionRes.json())?.["dist-tags"]?.["latest"];
+    const versionRes = spawnSync("firebase", ["--version"]);
+    pluginLogger.info("versionRes is :", versionRes.stderr?.toString());
+    const currentVersion = semver.valid(versionRes.stdout?.toString())
+    const npmVersionRes = spawnSync("npm", ["--version"])
+    const npmVersion = semver.valid(npmVersionRes.stdout.toString())
+    if (!currentVersion) {
+      message = `The Firebase CLI is not installed (or not available on $PATH). If you would like to install it, run ${
+        npmVersion
+          ? "npm install -g firebase-tools"
+          : "curl -sL https://firebase.tools | bash"
+      }`
+    } else if (semver.lt(currentVersion, latestVersion)) {
+       message = `There is an outdated version of the Firebase CLI installed on your system. We recommened updating to the latest verion by running ${
+        npmVersion
+        ? "npm install -g firebase-tools"
+        : "curl -sL https://firebase.tools | upgrade=true bash"
+       }`
+    } else {
+      pluginLogger.info(`Checked firebase-tools, is up to date!`);
+    }
+   } catch(err: any) {
+    pluginLogger.info(`Unable to check firebase-tools installation: ${err}`)
+  }
+
+  if (message) {
+    vscode.window.showInformationMessage(message);
+  }
+}