2a09d1a4
 liuqimichale
添加宜春 天水 宣化
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
class MinChunkSizePlugin {
constructor(options) {
if(typeof options !== "object" || Array.isArray(options)) {
throw new Error("Argument should be an options object.\nFor more info on options, see https://webpack.js.org/plugins/");
}
this.options = options;
}
apply(compiler) {
const options = this.options;
const minChunkSize = options.minChunkSize;
compiler.plugin("compilation", (compilation) => {
compilation.plugin("optimize-chunks-advanced", (chunks) => {
const equalOptions = {
chunkOverhead: 1,
entryChunkMultiplicator: 1
};
const sortedSizeFilteredExtendedPairCombinations = chunks.reduce((combinations, a, idx) => {
// create combination pairs
for(let i = 0; i < idx; i++) {
const b = chunks[i];
combinations.push([b, a]);
}
return combinations;
}, []).filter((pair) => {
// check if one of the chunks sizes is smaller than the minChunkSize
const p0SmallerThanMinChunkSize = pair[0].size(equalOptions) < minChunkSize;
const p1SmallerThanMinChunkSize = pair[1].size(equalOptions) < minChunkSize;
return p0SmallerThanMinChunkSize || p1SmallerThanMinChunkSize;
}).map((pair) => {
// extend combination pairs with size and integrated size
const a = pair[0].size(options);
const b = pair[1].size(options);
const ab = pair[0].integratedSize(pair[1], options);
return [a + b - ab, ab, pair[0], pair[1]];
}).filter((pair) => {
// filter pairs that do not have an integratedSize
// meaning they can NOT be integrated!
return pair[1] !== false;
}).sort((a, b) => { // sadly javascript does an inplace sort here
// sort by size
const diff = b[0] - a[0];
if(diff !== 0) return diff;
return a[1] - b[1];
});
if(sortedSizeFilteredExtendedPairCombinations.length === 0) return;
const pair = sortedSizeFilteredExtendedPairCombinations[0];
pair[2].integrate(pair[3], "min-size");
chunks.splice(chunks.indexOf(pair[3]), 1);
return true;
});
});
}
}
module.exports = MinChunkSizePlugin;
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