precache manifest

packages/runtimes/service-worker/src/ServiceWorkerRuntime.js

@@ -24,18 +24,21 @@ export default (new Runtime({
     }
 
     let manifest = [];
+    let precacheManifest = []
     bundleGraph.traverseBundles(b => {
       if (b.bundleBehavior === 'inline' || b.id === bundle.id) {
         return;
       }
 
       manifest.push(urlJoin(b.target.publicUrl, b.name));
+      precacheManifest.push({ url: urlJoin(b.target.publicUrl, b.name), revision: b.needsStableName ? b.hashReference : null });
     });
 
     let code = `import {_register} from '@parcel/service-worker';
 const manifest = ${JSON.stringify(manifest)};
+const precacheManifest = ${JSON.stringify(precacheManifest)};
 const version = ${JSON.stringify(bundle.hashReference)};
-_register(manifest, version);
+_register(manifest, precacheManifest, version);
 `;
 
     return [

packages/utils/service-worker/service-worker.d.ts

@@ -1,2 +1,9 @@
+export declare interface PrecacheEntry {
+  integrity?: string;
+  url: string;
+  revision?: string | null;
+}
+
 export const manifest: string[];
+export const precacheManifest: PrecacheEntry[];
 export const version: string;

packages/utils/service-worker/service-worker.js

@@ -1,8 +1,10 @@
 export let manifest = [];
+export let precacheManifest = [];
 export let version = '';
 
 // Called by the runtime.
-export function _register(m, v) {
+export function _register(m, pm, v) {
   manifest = m;
+  precacheManifest = pm;
   version = v;
 }