mirror of https://github.com/webpack/webpack.git
117 lines
3.8 KiB
JavaScript
117 lines
3.8 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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class OccurrenceOrderPlugin {
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constructor(preferEntry) {
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if(preferEntry !== undefined && typeof preferEntry !== "boolean") {
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throw new Error("Argument should be a boolean.\nFor more info on this plugin, see https://webpack.github.io/docs/list-of-plugins.html");
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}
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this.preferEntry = preferEntry;
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}
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apply(compiler) {
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const preferEntry = this.preferEntry;
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compiler.plugin("compilation", (compilation) => {
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compilation.plugin("optimize-module-order", (modules) => {
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function entryChunks(m) {
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return m.chunks.map((c) => {
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const sum = (c.isInitial() ? 1 : 0) + (c.entryModule === m ? 1 : 0);
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return sum;
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}).reduce((a, b) => {
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return a + b;
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}, 0);
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}
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function occursInEntry(m) {
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if(typeof m.__OccurenceOrderPlugin_occursInEntry === "number") return m.__OccurenceOrderPlugin_occursInEntry;
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const result = m.reasons.map((r) => {
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if(!r.module) return 0;
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return entryChunks(r.module);
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}).reduce((a, b) => {
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return a + b;
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}, 0) + entryChunks(m);
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return m.__OccurenceOrderPlugin_occursInEntry = result;
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}
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function occurs(m) {
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if(typeof m.__OccurenceOrderPlugin_occurs === "number") return m.__OccurenceOrderPlugin_occurs;
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const result = m.reasons.map((r) => {
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if(!r.module) return 0;
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return r.module.chunks.length;
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}).reduce((a, b) => {
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return a + b;
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}, 0) + m.chunks.length + m.chunks.filter((c) => {
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c.entryModule === m;
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}).length;
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return m.__OccurenceOrderPlugin_occurs = result;
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}
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modules.sort((a, b) => {
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if(preferEntry) {
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const aEntryOccurs = occursInEntry(a);
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const bEntryOccurs = occursInEntry(b);
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if(aEntryOccurs > bEntryOccurs) return -1;
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if(aEntryOccurs < bEntryOccurs) return 1;
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}
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const aOccurs = occurs(a);
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const bOccurs = occurs(b);
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if(aOccurs > bOccurs) return -1;
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if(aOccurs < bOccurs) return 1;
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if(a.identifier() > b.identifier()) return 1;
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if(a.identifier() < b.identifier()) return -1;
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return 0;
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});
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// TODO refactor to Map
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modules.forEach((m) => {
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m.__OccurenceOrderPlugin_occursInEntry = undefined;
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m.__OccurenceOrderPlugin_occurs = undefined;
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});
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});
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compilation.plugin("optimize-chunk-order", (chunks) => {
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function occursInEntry(c) {
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if(typeof c.__OccurenceOrderPlugin_occursInEntry === "number") return c.__OccurenceOrderPlugin_occursInEntry;
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const result = c.parents.filter((p) => {
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return p.isInitial();
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}).length;
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return c.__OccurenceOrderPlugin_occursInEntry = result;
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}
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function occurs(c) {
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return c.blocks.length;
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}
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chunks.forEach((c) => {
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c.modules.sort((a, b) => {
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if(a.identifier() > b.identifier()) return 1;
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if(a.identifier() < b.identifier()) return -1;
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return 0;
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});
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});
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chunks.sort((a, b) => {
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const aEntryOccurs = occursInEntry(a);
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const bEntryOccurs = occursInEntry(b);
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if(aEntryOccurs > bEntryOccurs) return -1;
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if(aEntryOccurs < bEntryOccurs) return 1;
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const aOccurs = occurs(a);
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const bOccurs = occurs(b);
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if(aOccurs > bOccurs) return -1;
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if(aOccurs < bOccurs) return 1;
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if(a.modules.length > b.modules.length) return -1;
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if(a.modules.length < b.modules.length) return 1;
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for(let i = 0; i < a.modules.length; i++) {
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if(a.modules[i].identifier() > b.modules[i].identifier()) return -1;
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if(a.modules[i].identifier() < b.modules[i].identifier()) return 1;
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}
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return 0;
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});
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// TODO refactor to Map
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chunks.forEach((c) => {
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c.__OccurenceOrderPlugin_occursInEntry = undefined;
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});
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});
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});
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}
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}
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module.exports = OccurrenceOrderPlugin;
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