Make homebrew update check use homebrew registry version info

packages/opencode/src/cli/upgrade.ts

@@ -5,7 +5,8 @@ import { Installation } from "@/installation"
 
 export async function upgrade() {
   const config = await Config.global()
-  const latest = await Installation.latest().catch(() => {})
+  const method = await Installation.method()
+  const latest = await Installation.latest(method).catch(() => {})
   if (!latest) return
   if (Installation.VERSION === latest) return
 
@@ -17,7 +18,6 @@ export async function upgrade() {
     return
   }
 
-  const method = await Installation.method()
   if (method === "unknown") return
   await Installation.upgrade(method, latest)
     .then(() => Bus.publish(Installation.Event.Updated, { version: latest }))

packages/opencode/src/installation/index.ts

@@ -163,7 +163,20 @@ export namespace Installation {
   export const CHANNEL = typeof OPENCODE_CHANNEL === "string" ? OPENCODE_CHANNEL : "local"
   export const USER_AGENT = `opencode/${CHANNEL}/${VERSION}`
 
-  export async function latest() {
+  export async function latest(installMethod?: Method) {
+    const detectedMethod = installMethod || (await method())
+    if (detectedMethod === "brew") {
+      const formula = await getBrewFormula()
+      if (formula === "opencode") {
+        return fetch("https://formulae.brew.sh/api/formula/opencode.json")
+          .then((res) => {
+            if (!res.ok) throw new Error(res.statusText)
+            return res.json()
+          })
+          .then((data: any) => data.versions.stable)
+      }
+    }
+
     const registry = await iife(async () => {
       const r = (await $`npm config get registry`.quiet().nothrow().text()).trim()
       const reg = r || "https://registry.npmjs.org"