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86 lines
2.4 KiB
86 lines
2.4 KiB
3 years ago
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"use strict";
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/** @typedef {import("./index.js").MinimizedResult} MinimizedResult */
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/** @typedef {import("source-map").RawSourceMap} RawSourceMap */
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/** @typedef {import("./index.js").InternalResult} InternalResult */
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/**
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* @template T
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* @param {import("./index.js").InternalOptions<T>} options
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* @returns {Promise<InternalResult>}
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*/
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const minify = async options => {
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const minifyFns = Array.isArray(options.minimizer.implementation) ? options.minimizer.implementation : [options.minimizer.implementation];
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/** @type {InternalResult} */
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const result = {
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outputs: [],
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warnings: [],
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errors: []
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};
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let needSourceMap = false;
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for (let i = 0; i <= minifyFns.length - 1; i++) {
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const minifyFn = minifyFns[i];
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const minifyOptions = Array.isArray(options.minimizer.options) ? options.minimizer.options[i] : options.minimizer.options;
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const prevResult = result.outputs.length > 0 ? result.outputs[result.outputs.length - 1] : {
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code: options.input,
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map: options.inputSourceMap
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};
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const {
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code,
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map
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} = prevResult; // eslint-disable-next-line no-await-in-loop
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const minifyResult = await minifyFn({
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[options.name]: code
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}, map, minifyOptions);
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if (typeof minifyResult.code !== "string") {
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throw new Error("minimizer function doesn't return the 'code' property or result is not a string value");
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}
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if (minifyResult.map) {
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needSourceMap = true;
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}
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if (minifyResult.errors) {
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result.errors = result.errors.concat(minifyResult.errors);
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}
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if (minifyResult.warnings) {
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result.warnings = result.warnings.concat(minifyResult.warnings);
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}
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result.outputs.push({
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code: minifyResult.code,
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map: minifyResult.map
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});
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}
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if (!needSourceMap) {
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result.outputs = [result.outputs[result.outputs.length - 1]];
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}
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return result;
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};
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/**
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* @param {string} options
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* @returns {Promise<InternalResult>}
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*/
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async function transform(options) {
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// 'use strict' => this === undefined (Clean Scope)
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// Safer for possible security issues, albeit not critical at all here
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// eslint-disable-next-line no-new-func, no-param-reassign
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const evaluatedOptions = new Function("exports", "require", "module", "__filename", "__dirname", `'use strict'\nreturn ${options}`)(exports, require, module, __filename, __dirname);
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return minify(evaluatedOptions);
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}
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module.exports = {
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minify,
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transform
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};
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