Method integrateChunks

lib/ChunkGraph.js:1080–1136

* Processes the provided chunk a. * @param {Chunk} chunkA the target chunk * @param {Chunk} chunkB the chunk to integrate * @returns {void}

(chunkA, chunkB)

	 * @returns {void}
	 */
	integrateChunks(chunkA, chunkB) {
		// Decide for one name (deterministic)
		if (chunkA.name && chunkB.name) {
			if (
				this.getNumberOfEntryModules(chunkA) > 0 ===
				this.getNumberOfEntryModules(chunkB) > 0
			) {
				// When both chunks have entry modules or none have one, use
				// shortest name
				if (chunkA.name.length !== chunkB.name.length) {
					chunkA.name =
						chunkA.name.length < chunkB.name.length ? chunkA.name : chunkB.name;
				} else {
					chunkA.name = chunkA.name < chunkB.name ? chunkA.name : chunkB.name;
				}
			} else if (this.getNumberOfEntryModules(chunkB) > 0) {
				// Pick the name of the chunk with the entry module
				chunkA.name = chunkB.name;
			}
		} else if (chunkB.name) {
			chunkA.name = chunkB.name;
		}

		// Merge id name hints
		for (const hint of chunkB.idNameHints) {
			chunkA.idNameHints.add(hint);
		}

		// Merge runtime
		chunkA.runtime = mergeRuntime(chunkA.runtime, chunkB.runtime);

		// getChunkModules is used here to create a clone, because disconnectChunkAndModule modifies
		for (const module of this.getChunkModules(chunkB)) {
			this.disconnectChunkAndModule(chunkB, module);
			this.connectChunkAndModule(chunkA, module);
		}

		for (const [
			module,
			chunkGroup
		] of this.getChunkEntryModulesWithChunkGroupIterable(chunkB)) {
			this.disconnectChunkAndEntryModule(chunkB, module);
			this.connectChunkAndEntryModule(
				chunkA,
				module,
				/** @type {Entrypoint} */
				(chunkGroup)
			);
		}

		for (const chunkGroup of chunkB.groupsIterable) {
			chunkGroup.replaceChunk(chunkB, chunkA);
			chunkA.addGroup(chunkGroup);
			chunkB.removeGroup(chunkGroup);
		}
		ChunkGraph.clearChunkGraphForChunk(chunkB);
	}