Function cleanupUnconnectedGroups

lib/buildChunkGraph.js:1404–1417

(compilation, allCreatedChunkGroups)

 * @param {Iterable<ChunkGroup>} allCreatedChunkGroups all chunk groups that where created before
 */
const cleanupUnconnectedGroups = (compilation, allCreatedChunkGroups) => {
	const { chunkGraph } = compilation;

	for (const chunkGroup of allCreatedChunkGroups) {
		if (chunkGroup.getNumberOfParents() === 0) {
			for (const chunk of chunkGroup.chunks) {
				compilation.chunks.delete(chunk);
				chunkGraph.disconnectChunk(chunk);
			}
			chunkGraph.disconnectChunkGroup(chunkGroup);
			chunkGroup.remove();
		}
	}
};

/**
 * This method creates the Chunk graph from the Module graph