/*
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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");
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const ModuleFilenameHelpers = require("./ModuleFilenameHelpers");
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const Template = require("./Template");
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const validateOptions = require("schema-utils");
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const schema = require("../schemas/plugins/BannerPlugin.json");
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/** @typedef {import("../declarations/plugins/BannerPlugin").BannerPluginArgument} BannerPluginArgument */
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/** @typedef {import("../declarations/plugins/BannerPlugin").BannerPluginOptions} BannerPluginOptions */
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const wrapComment = str => {
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if (!str.includes("\n")) {
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return Template.toComment(str);
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}
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return `/*!\n * ${str
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.replace(/\*\//g, "* /")
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.split("\n")
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.join("\n * ")}\n */`;
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};
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class BannerPlugin {
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/**
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* @param {BannerPluginArgument} options options object
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*/
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constructor(options) {
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if (arguments.length > 1) {
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throw new Error(
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"BannerPlugin only takes one argument (pass an options object)"
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);
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}
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validateOptions(schema, options, "Banner Plugin");
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if (typeof options === "string" || typeof options === "function") {
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options = {
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banner: options
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};
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}
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/** @type {BannerPluginOptions} */
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this.options = options;
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const bannerOption = options.banner;
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if (typeof bannerOption === "function") {
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const getBanner = bannerOption;
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this.banner = this.options.raw
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? getBanner
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: data => wrapComment(getBanner(data));
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} else {
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const banner = this.options.raw
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? bannerOption
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: wrapComment(bannerOption);
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this.banner = () => banner;
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}
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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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const matchObject = ModuleFilenameHelpers.matchObject.bind(
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undefined,
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options
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);
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compiler.hooks.compilation.tap("BannerPlugin", compilation => {
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compilation.hooks.optimizeChunkAssets.tap("BannerPlugin", chunks => {
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for (const chunk of chunks) {
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if (options.entryOnly && !chunk.canBeInitial()) {
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continue;
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}
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for (const file of chunk.files) {
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if (!matchObject(file)) {
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continue;
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}
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let query = "";
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let filename = file;
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const hash = compilation.hash;
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const querySplit = filename.indexOf("?");
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if (querySplit >= 0) {
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query = filename.substr(querySplit);
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filename = filename.substr(0, querySplit);
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}
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const lastSlashIndex = filename.lastIndexOf("/");
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const basename =
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lastSlashIndex === -1
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? filename
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: filename.substr(lastSlashIndex + 1);
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const data = {
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hash,
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chunk,
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filename,
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basename,
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query
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};
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const comment = compilation.getPath(banner(data), data);
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compilation.updateAsset(
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file,
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old => new ConcatSource(comment, "\n", old)
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);
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}
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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 = BannerPlugin;
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