52 lines
1.4 KiB
JavaScript
52 lines
1.4 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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const ConcatSource = require("webpack-sources").ConcatSource;
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const ModuleFilenameHelpers = require("./ModuleFilenameHelpers");
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function wrapComment(str) {
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if(!str.includes("\n")) return `/*! ${str} */`;
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return `/*!\n * ${str.split("\n").join("\n * ")}\n */`;
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}
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class BannerPlugin {
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constructor(options) {
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if(arguments.length > 1)
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throw new Error("BannerPlugin only takes one argument (pass an options object)");
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if(typeof options === "string")
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options = {
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banner: options
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};
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this.options = options || {};
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this.banner = this.options.raw ? options.banner : wrapComment(options.banner);
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}
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apply(compiler) {
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const options = this.options;
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const banner = this.banner;
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compiler.plugin("compilation", (compilation) => {
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compilation.plugin("optimize-chunk-assets", (chunks, callback) => {
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chunks.forEach((chunk) => {
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if(options.entryOnly && !chunk.isInitial()) return;
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chunk.files
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.filter(ModuleFilenameHelpers.matchObject.bind(undefined, options))
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.forEach((file) =>
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compilation.assets[file] = new ConcatSource(
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banner, "\n", compilation.assets[file]
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)
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);
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});
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callback();
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});
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});
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}
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}
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module.exports = BannerPlugin;
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