'use strict';
const htmlWebpackPlugin = require('html-webpack-plugin');
const { EVENT, PLUGIN } = require('./constants.js');
const debug = require('./common.js').debug;
const matches = require('./common.js').matches;
const normaliseOptions = require('./config.js');
const shouldAddResourceHints = require('./resource-hints.js').shouldAddResourceHints;
const addInitialChunkResourceHints = require('./initial-chunk-resource-hints.js');
const addAsyncChunkResourceHints = require('./async-chunk-resource-hints.js');
const elements = require('./elements.js');
const customAttributes = require('./custom-attributes.js');
const debugEvent = msg => debug(`${EVENT}: ${msg}`);
const falsySafeConcat = arrays =>
arrays.reduce(
(combined, array) => array ? combined.concat(array) : combined,
[]
);
const getHtmlWebpackOptions = pluginArgs =>
(pluginArgs && pluginArgs.plugin && pluginArgs.plugin.options)
? pluginArgs.plugin.options
: {};
const getCompilationOptions = compilation =>
(compilation && compilation.options) ? compilation.options : {};
class ScriptExtHtmlWebpackPlugin {
constructor (options) {
this.options = normaliseOptions(options);
}
apply (compiler) {
const compile = this.compilationCallback.bind(this);
const emit = this.emitCallback.bind(this);
if (compiler.hooks) {
compiler.hooks.compilation.tap(PLUGIN, compile);
compiler.hooks.emit.tap(PLUGIN, emit);
} else {
compiler.plugin('compilation', compile);
compiler.plugin('emit', emit);
}
}
compilationCallback (compilation) {
const alterAssetTags = this.alterAssetTagsCallback.bind(this, compilation);
if (compilation.hooks) {
const alterAssetTagGroups = compilation.hooks.htmlWebpackPluginAlterAssetTags || htmlWebpackPlugin.getHooks(compilation).alterAssetTagGroups;
alterAssetTagGroups.tap(PLUGIN, alterAssetTags);
} else {
compilation.plugin(EVENT, alterAssetTags);
}
}
alterAssetTagsCallback (compilation, pluginArgs, callback) {
const options = this.options;
const headTagName = pluginArgs.hasOwnProperty('headTags') ? 'headTags' : 'head';
const bodyTagName = pluginArgs.hasOwnProperty('bodyTags') ? 'bodyTags' : 'body';
try {
options.htmlWebpackOptions = getHtmlWebpackOptions(pluginArgs);
options.compilationOptions = getCompilationOptions(compilation);
debugEvent('starting');
if (elements.shouldUpdate(options)) {
debugEvent('replacing