added basic cli telemetry

app/src/cli/utils/telemetry.ts

@@ -0,0 +1,75 @@
+import { PostHog } from "posthog-js-lite";
+import { getVersion } from "cli/utils/sys";
+import { $console, env } from "core";
+
+type Properties = { [p: string]: any };
+
+let posthog: PostHog | null = null;
+let version: string | null = null;
+
+const enabled = env("cli_telemetry");
+
+export async function init() {
+   try {
+      if (!enabled) {
+         $console.debug("Telemetry disabled");
+         return;
+      }
+
+      $console.debug("Init telemetry");
+      if (!posthog) {
+         posthog = new PostHog(process.env.POSTHOG_KEY!, {
+            host: process.env.POSTHOG_HOST!,
+            disabled: !enabled,
+         });
+      }
+      version = await getVersion();
+   } catch (e) {
+      $console.debug("Failed to initialize telemetry", e);
+   }
+}
+
+export function client(): PostHog {
+   if (!posthog) {
+      throw new Error("PostHog client not initialized. Call init() first.");
+   }
+
+   return posthog;
+}
+
+export function capture(event: string, properties: Properties = {}): void {
+   try {
+      if (!enabled) return;
+
+      const name = `cli_${event}`;
+      const props = {
+         ...properties,
+         version: version!,
+      };
+      $console.debug("Capture", name, props);
+      client().capture(name, props);
+   } catch (e) {
+      $console.debug("Failed to capture telemetry", e);
+   }
+}
+
+export function createScoped(scope: string, p: Properties = {}) {
+   const properties = p;
+   const _capture = (event: string, props: Properties = {}) => {
+      return capture(`${scope}_${event}`, { ...properties, ...props });
+   };
+   return { capture: _capture, properties };
+}
+
+export async function flush() {
+   try {
+      if (!enabled) return;
+
+      $console.debug("Flush telemetry");
+      if (posthog) {
+         await posthog.flush();
+      }
+   } catch (e) {
+      $console.debug("Failed to flush telemetry", e);
+   }
+}