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"use strict";

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

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

var _neoAsync = _interopRequireDefault(require("neo-async"));

var _pify = _interopRequireDefault(require("pify"));

var _semver = _interopRequireDefault(require("semver"));

var _loaderUtils = require("loader-utils");

var _formatSassError = _interopRequireDefault(require("./formatSassError"));

var _webpackImporter = _interopRequireDefault(require("./webpackImporter"));

var _getSassOptions = _interopRequireDefault(require("./getSassOptions"));

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

let nodeSassJobQueue = null; // Very hacky check

function hasGetResolve(loaderContext) {
  return loaderContext.getResolve && // eslint-disable-next-line no-underscore-dangle
  loaderContext._compiler && // eslint-disable-next-line no-underscore-dangle
  loaderContext._compiler.resolverFactory && // eslint-disable-next-line no-underscore-dangle
  loaderContext._compiler.resolverFactory._create && /cachedCleverMerge/.test( // eslint-disable-next-line no-underscore-dangle
  loaderContext._compiler.resolverFactory._create.toString());
}
/**
 * The sass-loader makes node-sass and dart-sass available to webpack modules.
 *
 * @this {LoaderContext}
 * @param {string} content
 */


function loader(content) {
  const options = (0, _loaderUtils.getOptions)(this) || {};
  const callback = this.async();

  const addNormalizedDependency = file => {
    // node-sass returns POSIX paths
    this.dependency(_path.default.normalize(file));
  };

  if (typeof callback !== 'function') {
    throw new Error('Synchronous compilation is not supported anymore. See https://github.com/webpack-contrib/sass-loader/issues/333');
  }

  let resolve = (0, _pify.default)(this.resolve); // Supported since v4.36.0

  if (hasGetResolve(this)) {
    resolve = this.getResolve({
      mainFields: ['sass', 'style', 'main', '...'],
      mainFiles: ['_index', 'index', '...'],
      extensions: ['.scss', '.sass', '.css', '...']
    });
  }

  const sassOptions = (0, _getSassOptions.default)(this, options, content);
  const shouldUseWebpackImporter = typeof options.webpackImporter === 'boolean' ? options.webpackImporter : true;

  if (shouldUseWebpackImporter) {
    sassOptions.importer.push((0, _webpackImporter.default)(this.resourcePath, resolve, addNormalizedDependency));
  } // Skip empty files, otherwise it will stop webpack, see issue #21


  if (sassOptions.data.trim() === '') {
    callback(null, '');
    return;
  }

  const render = getRenderFuncFromSassImpl( // eslint-disable-next-line import/no-extraneous-dependencies, global-require
  options.implementation || getDefaultSassImpl());
  render(sassOptions, (error, result) => {
    if (error) {
      (0, _formatSassError.default)(error, this.resourcePath);

      if (error.file) {
        this.dependency(error.file);
      }

      callback(error);
      return;
    }

    if (result.map && result.map !== '{}') {
      // eslint-disable-next-line no-param-reassign
      result.map = JSON.parse(result.map); // result.map.file is an optional property that provides the output filename.
      // Since we don't know the final filename in the webpack build chain yet, it makes no sense to have it.
      // eslint-disable-next-line no-param-reassign

      delete result.map.file; // One of the sources is 'stdin' according to dart-sass/node-sass because we've used the data input.
      // Now let's override that value with the correct relative path.
      // Since we specified options.sourceMap = path.join(process.cwd(), "/sass.map"); in getSassOptions,
      // we know that this path is relative to process.cwd(). This is how node-sass works.
      // eslint-disable-next-line no-param-reassign

      const stdinIndex = result.map.sources.findIndex(source => source.indexOf('stdin') !== -1);

      if (stdinIndex !== -1) {
        // eslint-disable-next-line no-param-reassign
        result.map.sources[stdinIndex] = _path.default.relative(process.cwd(), this.resourcePath);
      } // node-sass returns POSIX paths, that's why we need to transform them back to native paths.
      // This fixes an error on windows where the source-map module cannot resolve the source maps.
      // @see https://github.com/webpack-contrib/sass-loader/issues/366#issuecomment-279460722
      // eslint-disable-next-line no-param-reassign


      result.map.sourceRoot = _path.default.normalize(result.map.sourceRoot); // eslint-disable-next-line no-param-reassign

      result.map.sources = result.map.sources.map(_path.default.normalize);
    } else {
      // eslint-disable-next-line no-param-reassign
      result.map = null;
    }

    result.stats.includedFiles.forEach(addNormalizedDependency);
    callback(null, result.css.toString(), result.map);
  });
}
/**
 * Verifies that the implementation and version of Sass is supported by this loader.
 *
 * @param {Object} module
 * @returns {Function}
 */


function getRenderFuncFromSassImpl(module) {
  const {
    info
  } = module;

  if (!info) {
    throw new Error('Unknown Sass implementation.');
  }

  const components = info.split('\t');

  if (components.length < 2) {
    throw new Error(`Unknown Sass implementation "${info}".`);
  }

  const [implementation, version] = components;

  if (!_semver.default.valid(version)) {
    throw new Error(`Invalid Sass version "${version}".`);
  }

  if (implementation === 'dart-sass') {
    if (!_semver.default.satisfies(version, '^1.3.0')) {
      throw new Error(`Dart Sass version ${version} is incompatible with ^1.3.0.`);
    }

    return module.render.bind(module);
  } else if (implementation === 'node-sass') {
    if (!_semver.default.satisfies(version, '^4.0.0')) {
      throw new Error(`Node Sass version ${version} is incompatible with ^4.0.0.`);
    } // There is an issue with node-sass when async custom importers are used
    // See https://github.com/sass/node-sass/issues/857#issuecomment-93594360
    // We need to use a job queue to make sure that one thread is always available to the UV lib


    if (nodeSassJobQueue === null) {
      const threadPoolSize = Number(process.env.UV_THREADPOOL_SIZE || 4);
      nodeSassJobQueue = _neoAsync.default.queue(module.render.bind(module), threadPoolSize - 1);
    }

    return nodeSassJobQueue.push.bind(nodeSassJobQueue);
  }

  throw new Error(`Unknown Sass implementation "${implementation}".`);
}

function getDefaultSassImpl() {
  let sassImplPkg = 'node-sass';

  try {
    require.resolve('node-sass');
  } catch (error) {
    try {
      require.resolve('sass');

      sassImplPkg = 'sass';
    } catch (ignoreError) {
      sassImplPkg = 'node-sass';
    }
  } // eslint-disable-next-line import/no-dynamic-require, global-require


  return require(sassImplPkg);
}

var _default = loader;
exports.default = _default;