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104 lines
3.4 KiB
104 lines
3.4 KiB
4 weeks ago
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = void 0;
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var _path = _interopRequireDefault(require("path"));
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var _options = _interopRequireDefault(require("./options.json"));
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var _utils = require("./utils");
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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async function lessLoader(source) {
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const options = this.getOptions(_options.default);
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const callback = this.async();
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let implementation;
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try {
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implementation = (0, _utils.getLessImplementation)(this, options.implementation);
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} catch (error) {
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callback(error);
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return;
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}
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if (!implementation) {
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callback(new Error(`The Less implementation "${options.implementation}" not found`));
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return;
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}
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const lessOptions = (0, _utils.getLessOptions)(this, options, implementation);
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const useSourceMap = typeof options.sourceMap === "boolean" ? options.sourceMap : this.sourceMap;
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if (useSourceMap) {
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lessOptions.sourceMap = {
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outputSourceFiles: true
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};
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}
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let data = source;
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if (typeof options.additionalData !== "undefined") {
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data = typeof options.additionalData === "function" ? `${await options.additionalData(data, this)}` : `${options.additionalData}\n${data}`;
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}
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const logger = this.getLogger("less-loader");
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const loaderContext = this;
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const loggerListener = {
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error(message) {
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// TODO enable by default in the next major release
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if (options.lessLogAsWarnOrErr) {
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loaderContext.emitError(new Error(message));
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} else {
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logger.error(message);
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}
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},
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warn(message) {
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// TODO enable by default in the next major release
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if (options.lessLogAsWarnOrErr) {
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loaderContext.emitWarning(new Error(message));
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} else {
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logger.warn(message);
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}
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},
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info(message) {
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logger.log(message);
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},
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debug(message) {
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logger.debug(message);
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}
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};
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implementation.logger.addListener(loggerListener);
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let result;
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try {
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result = await implementation.render(data, lessOptions);
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} catch (error) {
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if (error.filename) {
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// `less` returns forward slashes on windows when `webpack` resolver return an absolute windows path in `WebpackFileManager`
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// Ref: https://github.com/webpack-contrib/less-loader/issues/357
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this.addDependency(_path.default.normalize(error.filename));
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}
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callback((0, _utils.errorFactory)(error));
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return;
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} finally {
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// Fix memory leaks in `less`
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implementation.logger.removeListener(loggerListener);
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delete lessOptions.pluginManager.webpackLoaderContext;
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delete lessOptions.pluginManager;
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}
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const {
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css,
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imports
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} = result;
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imports.forEach(item => {
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if ((0, _utils.isUnsupportedUrl)(item)) {
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return;
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}
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// `less` return forward slashes on windows when `webpack` resolver return an absolute windows path in `WebpackFileManager`
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// Ref: https://github.com/webpack-contrib/less-loader/issues/357
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const normalizedItem = _path.default.normalize(item);
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// Custom `importer` can return only `contents` so item will be relative
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if (_path.default.isAbsolute(normalizedItem)) {
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this.addDependency(normalizedItem);
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}
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});
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let map = typeof result.map === "string" ? JSON.parse(result.map) : result.map;
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if (map && useSourceMap) {
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map = (0, _utils.normalizeSourceMap)(map, this.rootContext);
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}
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callback(null, css, map);
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}
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var _default = exports.default = lessLoader;
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