62 lines
2.6 KiB
JavaScript
62 lines
2.6 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const through2_1 = require("through2");
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const terser_1 = require("terser");
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const PluginError = require("plugin-error");
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const applySourceMap = require("vinyl-sourcemaps-apply");
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const PLUGIN_NAME = 'terser';
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/**
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* @param { MinifyOptions } gulpTerserOptions: gulp-terser configuration
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* @param { typeof minify | undefined } customMinifyFunc：custom minify function
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*/
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function gulpTerser(gulpTerserOptions = {}, customMinifyFunc) {
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const minifyFunc = customMinifyFunc !== null && customMinifyFunc !== void 0 ? customMinifyFunc : terser_1.minify;
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return (0, through2_1.obj)(async function (chunk, enc, callback) {
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if (chunk.isStream()) {
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this.emit('error', new PluginError(PLUGIN_NAME, 'Streams are not supported!'));
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return callback();
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}
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if (chunk.isBuffer()) {
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try {
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const terserOptions = { ...gulpTerserOptions };
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// SourceMap configuration
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if (chunk.sourceMap) {
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if (!terserOptions.sourceMap || terserOptions.sourceMap === true) {
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terserOptions.sourceMap = {};
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}
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terserOptions.sourceMap.filename = chunk.sourceMap.file;
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}
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const chunkString = chunk.contents.toString('utf8');
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let build = {};
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// gulp version compatibility
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if (('sourceMap' in chunk) && ('file' in chunk.sourceMap)) {
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build[chunk.sourceMap.file] = chunkString;
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}
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else {
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build = chunkString;
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}
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// Compressed code (terser5 is asynchronous, terser4 is synchronous)
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const minifyOutput = await minifyFunc(build, terserOptions);
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if ('error' in minifyOutput) {
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throw new Error(minifyOutput['error']['message']);
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}
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// Buffer
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if (minifyOutput.code) {
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chunk.contents = ('from' in Buffer) ? Buffer.from(minifyOutput.code) : new Buffer(minifyOutput.code);
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}
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// Output source-map
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if (chunk.sourceMap && minifyOutput.map) {
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applySourceMap(chunk, minifyOutput.map);
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}
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this.push(chunk);
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return callback();
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}
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catch (err) {
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this.emit('error', new PluginError(PLUGIN_NAME, err));
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return callback();
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}
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}
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});
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}
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exports.default = gulpTerser;
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