6994cc3d15
* Generate `_headers` and `_redirects` by passing assets through ejs templates. * PR feedback * Excluding service worker stuff from prerender * Build SW in dev * Let's give this a try * lol * Is this how it works?
48 lines
1.7 KiB
JavaScript
48 lines
1.7 KiB
JavaScript
const path = require('path');
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const fs = require('fs');
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const ejs = require('ejs');
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const AssetsPlugin = require('assets-webpack-plugin');
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module.exports = class AssetTemplatePlugin extends AssetsPlugin {
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constructor(options) {
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options = options || {};
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if (!options.template) throw Error('AssetTemplatePlugin: template option is required.');
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super({
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useCompilerPath: true,
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filename: options.filename,
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processOutput: files => this._processOutput(files)
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});
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this._template = path.resolve(process.cwd(), options.template);
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const ignore = options.ignore || /(manifest\.json|\.DS_Store)$/;
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this._ignore = typeof ignore === 'function' ? ({ test: ignore }) : ignore;
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}
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_processOutput(files) {
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const mapping = {
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all: [],
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byType: {},
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entries: {}
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};
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for (const entryName in files) {
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// non-entry-point-derived assets are collected under an empty string key
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// since that's a bit awkward, we'll call them "assets"
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const name = entryName === '' ? 'assets' : entryName;
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const listing = files[entryName];
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const entry = mapping.entries[name] = {
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all: [],
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byType: {}
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};
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for (let type in listing) {
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const list = [].concat(listing[type]).filter(file => !this._ignore.test(file));
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if (!list.length) continue;
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mapping.all = mapping.all.concat(list);
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mapping.byType[type] = (mapping.byType[type] || []).concat(list);
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entry.all = entry.all.concat(list);
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entry.byType[type] = (entry.byType[type] || []).concat(list);
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}
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}
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mapping.files = mapping.all;
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return ejs.render(fs.readFileSync(this._template, 'utf8'), mapping);
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}
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};
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