Add unstable manual shared bundles

packages/core/core/src/public/Bundle.js

@@ -129,6 +129,10 @@ export class Bundle implements IBundle {
     return this.#bundle.isSplittable;
   }
 
+  get manualSharedBundle(): ?string {
+    return this.#bundle.manualSharedBundle;
+  }
+
   get target(): ITarget {
     return new Target(this.#bundle.target, this.#options);
   }

packages/core/core/src/public/MutableBundleGraph.js

@@ -9,7 +9,11 @@ import type {
   MutableBundleGraph as IMutableBundleGraph,
   Target,
 } from '@parcel/types';
-import type {ParcelOptions, BundleGroup as InternalBundleGroup} from '../types';
+import type {
+  ParcelOptions,
+  BundleGroup as InternalBundleGroup,
+  BundleNode,
+} from '../types';
 
 import invariant from 'assert';
 import nullthrows from 'nullthrows';
@@ -76,6 +80,16 @@ export default class MutableBundleGraph
     );
   }
 
+  getResolvedAsset(dependency: IDependency): ?IAsset {
+    let internalAsset = this.#graph.getResolvedAsset(
+      dependencyToInternalDependency(dependency),
+    );
+
+    if (internalAsset) {
+      return assetFromValue(internalAsset, this.#options);
+    }
+  }
+
   createBundleGroup(dependency: IDependency, target: Target): IBundleGroup {
     let dependencyNode = this.#graph._graph.getNodeByContentKey(dependency.id);
     if (!dependencyNode) {
@@ -204,7 +218,7 @@ export default class MutableBundleGraph
       isPlaceholder = entryAssetNode.requested === false;
     }
 
-    let bundleNode = {
+    let bundleNode: BundleNode = {
       type: 'bundle',
       id: bundleId,
       value: {
@@ -232,6 +246,7 @@ export default class MutableBundleGraph
         name: null,
         displayName: null,
         publicId,
+        manualSharedBundle: opts.manualSharedBundle,
       },
     };
 

packages/core/core/src/types.js

@@ -518,6 +518,7 @@ export type Bundle = {|
   name: ?string,
   displayName: ?string,
   pipeline: ?string,
+  manualSharedBundle?: ?string,
 |};
 
 export type BundleNode = {|