node_modules/terser-webpack-plugin/dist/index.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _crypto = _interopRequireDefault(require("crypto"));

var _path = _interopRequireDefault(require("path"));

var _sourceMap = require("source-map");

var _webpackSources = require("webpack-sources");

var _RequestShortener = _interopRequireDefault(require("webpack/lib/RequestShortener"));

var _ModuleFilenameHelpers = _interopRequireDefault(require("webpack/lib/ModuleFilenameHelpers"));

var _schemaUtils = _interopRequireDefault(require("schema-utils"));

var _serializeJavascript = _interopRequireDefault(require("serialize-javascript"));

var _package = _interopRequireDefault(require("terser/package.json"));

var _options = _interopRequireDefault(require("./options.json"));

var _TaskRunner = _interopRequireDefault(require("./TaskRunner"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

const warningRegex = /\[.+:([0-9]+),([0-9]+)\]/;

class TerserPlugin {
  constructor(options = {}) {
    (0, _schemaUtils.default)(_options.default, options, 'Terser Plugin');
    const {
      minify,
      terserOptions = {},
      test = /\.m?js(\?.*)?$/i,
      chunkFilter = () => true,
      warningsFilter = () => true,
      extractComments = false,
      sourceMap = false,
      cache = false,
      cacheKeys = defaultCacheKeys => defaultCacheKeys,
      parallel = false,
      include,
      exclude
    } = options;
    this.options = {
      test,
      chunkFilter,
      warningsFilter,
      extractComments,
      sourceMap,
      cache,
      cacheKeys,
      parallel,
      include,
      exclude,
      minify,
      terserOptions: _objectSpread({
        output: {
          comments: extractComments ? false : /^\**!|@preserve|@license|@cc_on/i
        }
      }, terserOptions)
    };
  }

  static isSourceMap(input) {
    // All required options for `new SourceMapConsumer(...options)`
    // https://github.com/mozilla/source-map#new-sourcemapconsumerrawsourcemap
    return Boolean(input && input.version && input.sources && Array.isArray(input.sources) && typeof input.mappings === 'string');
  }

  static buildSourceMap(inputSourceMap) {
    if (!inputSourceMap || !TerserPlugin.isSourceMap(inputSourceMap)) {
      return null;
    }

    return new _sourceMap.SourceMapConsumer(inputSourceMap);
  }

  static buildError(err, file, sourceMap, requestShortener) {
    // Handling error which should have line, col, filename and message
    if (err.line) {
      const original = sourceMap && sourceMap.originalPositionFor({
        line: err.line,
        column: err.col
      });

      if (original && original.source && requestShortener) {
        return new Error(`${file} from Terser\n${err.message} [${requestShortener.shorten(original.source)}:${original.line},${original.column}][${file}:${err.line},${err.col}]`);
      }

      return new Error(`${file} from Terser\n${err.message} [${file}:${err.line},${err.col}]`);
    } else if (err.stack) {
      return new Error(`${file} from Terser\n${err.stack}`);
    }

    return new Error(`${file} from Terser\n${err.message}`);
  }

  static buildWarning(warning, file, sourceMap, requestShortener, warningsFilter) {
    let warningMessage = warning;
    let locationMessage = '';
    let source = null;

    if (sourceMap) {
      const match = warningRegex.exec(warning);

      if (match) {
        const line = +match[1];
        const column = +match[2];
        const original = sourceMap.originalPositionFor({
          line,
          column
        });

        if (original && original.source && original.source !== file && requestShortener) {
          ({
            source
          } = original);
          warningMessage = `${warningMessage.replace(warningRegex, '')}`;
          locationMessage = `[${requestShortener.shorten(original.source)}:${original.line},${original.column}]`;
        }
      }
    }

    if (warningsFilter && !warningsFilter(warning, source)) {
      return null;
    }

    return `Terser Plugin: ${warningMessage}${locationMessage}`;
  }

  apply(compiler) {
    const buildModuleFn = moduleArg => {
      // to get detailed location info about errors
      moduleArg.useSourceMap = true;
    };

    const optimizeFn = (compilation, chunks, callback) => {
      const taskRunner = new _TaskRunner.default({
        cache: this.options.cache,
        parallel: this.options.parallel
      });
      const processedAssets = new WeakSet();
      const tasks = [];
      const {
        chunkFilter
      } = this.options;
      Array.from(chunks).filter(chunk => chunkFilter && chunkFilter(chunk)).reduce((acc, chunk) => acc.concat(chunk.files || []), []).concat(compilation.additionalChunkAssets || []).filter(_ModuleFilenameHelpers.default.matchObject.bind(null, this.options)).forEach(file => {
        let inputSourceMap;
        const asset = compilation.assets[file];

        if (processedAssets.has(asset)) {
          return;
        }

        try {
          let input;

          if (this.options.sourceMap && asset.sourceAndMap) {
            const {
              source,
              map
            } = asset.sourceAndMap();
            input = source;

            if (TerserPlugin.isSourceMap(map)) {
              inputSourceMap = map;
            } else {
              inputSourceMap = map;
              compilation.warnings.push(new Error(`${file} contains invalid source map`));
            }
          } else {
            input = asset.source();
            inputSourceMap = null;
          } // Handling comment extraction


          let commentsFile = false;

          if (this.options.extractComments) {
            commentsFile = this.options.extractComments.filename || `${file}.LICENSE`;

            if (typeof commentsFile === 'function') {
              commentsFile = commentsFile(file);
            }
          }

          const task = {
            file,
            input,
            inputSourceMap,
            commentsFile,
            extractComments: this.options.extractComments,
            terserOptions: this.options.terserOptions,
            minify: this.options.minify
          };

          if (this.options.cache) {
            const defaultCacheKeys = {
              terser: _package.default.version,
              node_version: process.version,
              // eslint-disable-next-line global-require
              'terser-webpack-plugin': require('../package.json').version,
              'terser-webpack-plugin-options': this.options,
              hash: _crypto.default.createHash('md4').update(input).digest('hex')
            };
            task.cacheKeys = this.options.cacheKeys(defaultCacheKeys, file);
          }

          tasks.push(task);
        } catch (error) {
          compilation.errors.push(TerserPlugin.buildError(error, file, TerserPlugin.buildSourceMap(inputSourceMap), new _RequestShortener.default(compiler.context)));
        }
      });
      taskRunner.run(tasks, (tasksError, results) => {
        if (tasksError) {
          compilation.errors.push(tasksError);
          return;
        }

        results.forEach((data, index) => {
          const {
            file,
            input,
            inputSourceMap,
            commentsFile
          } = tasks[index];
          const {
            error,
            map,
            code,
            warnings
          } = data;
          let {
            extractedComments
          } = data;
          let sourceMap = null;

          if (error || warnings && warnings.length > 0) {
            sourceMap = TerserPlugin.buildSourceMap(inputSourceMap);
          } // Handling results
          // Error case: add errors, and go to next file


          if (error) {
            compilation.errors.push(TerserPlugin.buildError(error, file, sourceMap, new _RequestShortener.default(compiler.context)));
            return;
          }

          let outputSource;

          if (map) {
            outputSource = new _webpackSources.SourceMapSource(code, file, JSON.parse(map), input, inputSourceMap, true);
          } else {
            outputSource = new _webpackSources.RawSource(code);
          } // Write extracted comments to commentsFile


          if (commentsFile && extractedComments && extractedComments.length > 0) {
            if (commentsFile in compilation.assets) {
              const commentsFileSource = compilation.assets[commentsFile].source();
              extractedComments = extractedComments.filter(comment => !commentsFileSource.includes(comment));
            }

            if (extractedComments.length > 0) {
              // Add a banner to the original file
              if (this.options.extractComments.banner !== false) {
                let banner = this.options.extractComments.banner || `For license information please see ${_path.default.posix.basename(commentsFile)}`;

                if (typeof banner === 'function') {
                  banner = banner(commentsFile);
                }

                if (banner) {
                  outputSource = new _webpackSources.ConcatSource(`/*! ${banner} */\n`, outputSource);
                }
              }

              const commentsSource = new _webpackSources.RawSource(`${extractedComments.join('\n\n')}\n`);

              if (commentsFile in compilation.assets) {
                // commentsFile already exists, append new comments...
                if (compilation.assets[commentsFile] instanceof _webpackSources.ConcatSource) {
                  compilation.assets[commentsFile].add('\n');
                  compilation.assets[commentsFile].add(commentsSource);
                } else {
                  compilation.assets[commentsFile] = new _webpackSources.ConcatSource(compilation.assets[commentsFile], '\n', commentsSource);
                }
              } else {
                compilation.assets[commentsFile] = commentsSource;
              }
            }
          } // Updating assets


          processedAssets.add(compilation.assets[file] = outputSource); // Handling warnings

          if (warnings && warnings.length > 0) {
            warnings.forEach(warning => {
              const builtWarning = TerserPlugin.buildWarning(warning, file, sourceMap, new _RequestShortener.default(compiler.context), this.options.warningsFilter);

              if (builtWarning) {
                compilation.warnings.push(builtWarning);
              }
            });
          }
        });
        taskRunner.exit();
        callback();
      });
    };

    const plugin = {
      name: this.constructor.name
    };
    compiler.hooks.compilation.tap(plugin, compilation => {
      if (this.options.sourceMap) {
        compilation.hooks.buildModule.tap(plugin, buildModuleFn);
      }

      const {
        mainTemplate,
        chunkTemplate
      } = compilation; // Regenerate `contenthash` for minified assets

      for (const template of [mainTemplate, chunkTemplate]) {
        template.hooks.hashForChunk.tap(plugin, hash => {
          const data = (0, _serializeJavascript.default)({
            terser: _package.default.version,
            terserOptions: this.options.terserOptions
          });
          hash.update('TerserPlugin');
          hash.update(data);
        });
      }

      compilation.hooks.optimizeChunkAssets.tapAsync(plugin, optimizeFn.bind(this, compilation));
    });
  }

}

var _default = TerserPlugin;
exports.default = _default;