Merge pull request #7603 from webpack/feature/chunk-module-index

add per chunk index and index2

lib/ChunkGroup.js

@@ -70,6 +70,12 @@ class ChunkGroup {
 		this.chunks = [];
 		/** @type {OriginRecord[]} */
 		this.origins = [];
+		/** Indicies in top-down order */
+		/** @private @type {Map<Module, number>} */
+		this._moduleIndicies = new Map();
+		/** Indicies in bottom-up order */
+		/** @private @type {Map<Module, number>} */
+		this._moduleIndicies2 = new Map();
 	}
 
 	/**
@@ -447,6 +453,44 @@ class ChunkGroup {
 		return result;
 	}
 
+	/**
+	 * Sets the top-down index of a module in this ChunkGroup
+	 * @param {Module} module module for which the index should be set
+	 * @param {number} index the index of the module
+	 * @returns {void}
+	 */
+	setModuleIndex(module, index) {
+		this._moduleIndicies.set(module, index);
+	}
+
+	/**
+	 * Gets the top-down index of a module in this ChunkGroup
+	 * @param {Module} module the module
+	 * @returns {number} index
+	 */
+	getModuleIndex(module) {
+		return this._moduleIndicies.get(module);
+	}
+
+	/**
+	 * Sets the bottom-up index of a module in this ChunkGroup
+	 * @param {Module} module module for which the index should be set
+	 * @param {number} index the index of the module
+	 * @returns {void}
+	 */
+	setModuleIndex2(module, index) {
+		this._moduleIndicies2.set(module, index);
+	}
+
+	/**
+	 * Gets the bottom-up index of a module in this ChunkGroup
+	 * @param {Module} module the module
+	 * @returns {number} index
+	 */
+	getModuleIndex2(module) {
+		return this._moduleIndicies2.get(module);
+	}
+
 	checkConstraints() {
 		const chunk = this;
 		for (const child of chunk._children) {