import { minify } from "../deps/terser.ts";import { merge } from "../core/utils/object.ts";import { Page } from "../core/file.ts";import { prepareAsset, saveAsset } from "./source_maps.ts";
import type Site from "../core/site.ts";import type { MinifyOptions } from "../deps/terser.ts";
export interface Options { extensions?: string[];
options?: MinifyOptions;}
export const defaults: Options = { extensions: [".js"], options: { module: true, compress: true, mangle: true, },};
export default function (userOptions?: Options) { const options = merge(defaults, userOptions);
return (site: Site) => { site.loadAssets(options.extensions); site.process(options.extensions, (pages) => pages.forEach(terser)); site.filter("terser", filter, true);
async function terser(page: Page) { const { content, filename, sourceMap, enableSourceMap } = prepareAsset( site, page, );
const terserOptions = { ...options.options, sourceMap: enableSourceMap ? { content: JSON.stringify(sourceMap), filename: filename, } : undefined, };
try { const output = await minify({ [filename]: content }, terserOptions); saveAsset( site, page, output.code!, output.map, ); } catch (cause) { throw new Error( `Error processing the file: ${filename} by the Terser plugin.`, { cause }, ); } }
async function filter(code: string): Promise<string | undefined> { const output = await minify(code, options.options); return output.code; } };}
declare global { namespace Lume { export interface Helpers { terser: (code: string) => Promise<string | undefined>; } }}