@tdb/web
Version:
Common condiguration for serving a web-site and testing web-based UI components.
331 lines (253 loc) • 10.6 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
var _crypto = require('crypto');
var _crypto2 = _interopRequireDefault(_crypto);
var _path = require('path');
var _path2 = _interopRequireDefault(_path);
var _sourceMap = require('source-map');
var _webpackSources = require('webpack-sources');
var _RequestShortener = require('webpack/lib/RequestShortener');
var _RequestShortener2 = _interopRequireDefault(_RequestShortener);
var _ModuleFilenameHelpers = require('webpack/lib/ModuleFilenameHelpers');
var _ModuleFilenameHelpers2 = _interopRequireDefault(_ModuleFilenameHelpers);
var _schemaUtils = require('schema-utils');
var _schemaUtils2 = _interopRequireDefault(_schemaUtils);
var _options = require('./options.json');
var _options2 = _interopRequireDefault(_options);
var _TaskRunner = require('./TaskRunner');
var _TaskRunner2 = _interopRequireDefault(_TaskRunner);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
const warningRegex = /\[.+:([0-9]+),([0-9]+)\]/; /* eslint-disable
no-param-reassign
*/
class TerserPlugin {
constructor(options = {}) {
(0, _schemaUtils2.default)(_options2.default, options, 'Terser Plugin');
const {
minify,
terserOptions = {},
test = /\.js(\?.*)?$/i,
warningsFilter = () => true,
extractComments = false,
sourceMap = false,
cache = false,
cacheKeys = defaultCacheKeys => defaultCacheKeys,
parallel = false,
include,
exclude
} = options;
this.options = {
test,
warningsFilter,
extractComments,
sourceMap,
cache,
cacheKeys,
parallel,
include,
exclude,
minify,
terserOptions: Object.assign({
output: {
comments: extractComments ? false : /^\**!|@preserve|@license|@cc_on/i
}
}, terserOptions)
};
}
static isSourceMap(input) {
// All required options for `new SourceMapConsumer(...options)`
// https://github.com/mozilla/source-map#new-sourcemapconsumerrawsourcemap
return Boolean(input && input.version && input.sources && Array.isArray(input.sources) && typeof input.mappings === 'string');
}
static buildSourceMap(inputSourceMap) {
if (!inputSourceMap || !TerserPlugin.isSourceMap(inputSourceMap)) {
return null;
}
return new _sourceMap.SourceMapConsumer(inputSourceMap);
}
static buildError(err, file, sourceMap, requestShortener) {
// Handling error which should have line, col, filename and message
if (err.line) {
const original = sourceMap && sourceMap.originalPositionFor({
line: err.line,
column: err.col
});
if (original && original.source && requestShortener) {
return new Error(`${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 _TaskRunner2.default({
cache: this.options.cache,
parallel: this.options.parallel
});
const processedAssets = new WeakSet();
const tasks = [];
chunks.reduce((acc, chunk) => acc.concat(chunk.files || []), []).concat(compilation.additionalChunkAssets || []).filter(_ModuleFilenameHelpers2.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 { outputPath } = compiler;
const defaultCacheKeys = {
// eslint-disable-next-line global-require
terser: require('terser/package.json').version,
// eslint-disable-next-line global-require
'terser-webpack-plugin': require('../package.json').version,
'terser-webpack-plugin-options': this.options,
path: `${outputPath ? `${outputPath}/` : ''}${file}`,
hash: _crypto2.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 _RequestShortener2.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, 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 _RequestShortener2.default(compiler.context)));
return;
}
let outputSource;
if (map) {
outputSource = new _webpackSources.SourceMapSource(code, file, JSON.parse(map), input, inputSourceMap);
} else {
outputSource = new _webpackSources.RawSource(code);
}
// Write extracted comments to commentsFile
if (commentsFile && 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 ${_path2.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 _RequestShortener2.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);
}
compilation.hooks.optimizeChunkAssets.tapAsync(plugin, optimizeFn.bind(this, compilation));
});
}
}
exports.default = TerserPlugin;