feat(cli): adding pre-release + analytics disclaimer on first run of cli

apps/wing/src/cli.ts

@@ -1,6 +1,11 @@
 // for WebAssembly typings:
 /// <reference lib="dom" />
 
+import os from "os";
+import fs from "fs";
+import path from "path";
+import chalk from "chalk";
+
 import { compile, docs, test, checkForUpdates, run } from "./commands";
 import { satisfies } from "compare-versions";
 
@@ -24,6 +29,39 @@ function actionErrorHandler(fn: (...args: any[]) => Promise<any>) {
 async function main() {
   checkNodeVersion();
 
+  // Check if the flag file exists
+  const wingDirPath = path.join(os.homedir(), ".wing");
+  const flagFilePath = path.join(wingDirPath, ".cli_initialized");
+  const isFirstRun = !fs.existsSync(flagFilePath);
+
+  // If it's the first run, display the disclaimer and create the flag file
+  if (isFirstRun) {
+    const disclaimer = `
+🧪 This is an early pre-release of the Wing Programming Language (aka "alpha").
+
+We are working hard to make this a great tool, but there's still a pretty good
+chance you'll encounter missing pieces, rough edges, performance issues and even,
+god forbid, bugs 🐞.
+
+Please don't hesitate to ping us at ${chalk.blueBright.bold.underline(
+      "https://t.winglang.io/slack"
+    )} or file an issue at
+${chalk.blueBright.bold.underline(
+  "https://github.com/winglang/wing"
+)}. We promise to do our best to respond quickly and help out.
+
+To help us identify issues early, we are collecting anonymous analytics.
+To turn this off, set ${chalk.yellowBright.bold("WING_CLI_DISABLE_ANALYTICS=1")}.
+For more information see ${chalk.blueBright.bold.underline("https://winglang.io/docs/analytics")}
+
+${chalk.redBright("(This message will self-destruct after the first run)")}
+`;
+
+    console.log(`${chalk.hex("#2AD5C1")(disclaimer)}`);
+
+    fs.writeFileSync(flagFilePath, "");
+  }
+
   const program = new Command();
 
   program.name("wing").version(PACKAGE_VERSION);