first

node_modules/less-loader/dist/utils.js

@@ -0,0 +1,222 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.errorFactory = errorFactory;
+exports.getLessImplementation = getLessImplementation;
+exports.getLessOptions = getLessOptions;
+exports.isUnsupportedUrl = isUnsupportedUrl;
+exports.normalizeSourceMap = normalizeSourceMap;
+var _path = _interopRequireDefault(require("path"));
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+/* eslint-disable class-methods-use-this */
+const trailingSlash = /[/\\]$/;
+
+// This somewhat changed in Less 3.x. Now the file name comes without the
+// automatically added extension whereas the extension is passed in as `options.ext`.
+// So, if the file name matches this regexp, we simply ignore the proposed extension.
+const IS_SPECIAL_MODULE_IMPORT = /^~[^/]+$/;
+
+// `[drive_letter]:\` + `\\[server]\[share_name]\`
+const IS_NATIVE_WIN32_PATH = /^[a-z]:[/\\]|^\\\\/i;
+
+// Examples:
+// - ~package
+// - ~package/
+// - ~@org
+// - ~@org/
+// - ~@org/package
+// - ~@org/package/
+const IS_MODULE_IMPORT = /^~([^/]+|[^/]+\/|@[^/]+[/][^/]+|@[^/]+\/?|@[^/]+[/][^/]+\/)$/;
+const MODULE_REQUEST_REGEX = /^[^?]*~/;
+
+/**
+ * Creates a Less plugin that uses webpack's resolving engine that is provided by the loaderContext.
+ *
+ * @param {LoaderContext} loaderContext
+ * @param {object} implementation
+ * @returns {LessPlugin}
+ */
+function createWebpackLessPlugin(loaderContext, implementation) {
+  const resolve = loaderContext.getResolve({
+    dependencyType: "less",
+    conditionNames: ["less", "style", "..."],
+    mainFields: ["less", "style", "main", "..."],
+    mainFiles: ["index", "..."],
+    extensions: [".less", ".css"],
+    preferRelative: true
+  });
+  class WebpackFileManager extends implementation.FileManager {
+    supports(filename) {
+      if (filename[0] === "/" || IS_NATIVE_WIN32_PATH.test(filename)) {
+        return true;
+      }
+      if (this.isPathAbsolute(filename)) {
+        return false;
+      }
+      return true;
+    }
+
+    // Sync resolving is used at least by the `data-uri` function.
+    // This file manager doesn't know how to do it, so let's delegate it
+    // to the default file manager of Less.
+    // We could probably use loaderContext.resolveSync, but it's deprecated,
+    // see https://webpack.js.org/api/loaders/#this-resolvesync
+    supportsSync() {
+      return false;
+    }
+    async resolveFilename(filename, currentDirectory) {
+      // Less is giving us trailing slashes, but the context should have no trailing slash
+      const context = currentDirectory.replace(trailingSlash, "");
+      let request = filename;
+
+      // A `~` makes the url an module
+      if (MODULE_REQUEST_REGEX.test(filename)) {
+        request = request.replace(MODULE_REQUEST_REGEX, "");
+      }
+      if (IS_MODULE_IMPORT.test(filename)) {
+        request = request[request.length - 1] === "/" ? request : `${request}/`;
+      }
+      return this.resolveRequests(context, [...new Set([request, filename])]);
+    }
+    async resolveRequests(context, possibleRequests) {
+      if (possibleRequests.length === 0) {
+        return Promise.reject();
+      }
+      let result;
+      try {
+        result = await resolve(context, possibleRequests[0]);
+      } catch (error) {
+        const [, ...tailPossibleRequests] = possibleRequests;
+        if (tailPossibleRequests.length === 0) {
+          throw error;
+        }
+        result = await this.resolveRequests(context, tailPossibleRequests);
+      }
+      return result;
+    }
+    async loadFile(filename, ...args) {
+      let result;
+      try {
+        if (IS_SPECIAL_MODULE_IMPORT.test(filename)) {
+          const error = new Error();
+          error.type = "Next";
+          throw error;
+        }
+        result = await super.loadFile(filename, ...args);
+      } catch (error) {
+        if (error.type !== "File" && error.type !== "Next") {
+          return Promise.reject(error);
+        }
+        try {
+          result = await this.resolveFilename(filename, ...args);
+        } catch (webpackResolveError) {
+          error.message = `Less resolver error:\n${error.message}\n\n` + `Webpack resolver error details:\n${webpackResolveError.details}\n\n` + `Webpack resolver error missing:\n${webpackResolveError.missing}\n\n`;
+          return Promise.reject(error);
+        }
+        loaderContext.addDependency(result);
+        return super.loadFile(result, ...args);
+      }
+      loaderContext.addDependency(_path.default.normalize(result.filename));
+      return result;
+    }
+  }
+  return {
+    install(lessInstance, pluginManager) {
+      pluginManager.addFileManager(new WebpackFileManager());
+    },
+    minVersion: [3, 0, 0]
+  };
+}
+
+/**
+ * Get the `less` options from the loader context and normalizes its values
+ *
+ * @param {object} loaderContext
+ * @param {object} loaderOptions
+ * @param {object} implementation
+ * @returns {Object}
+ */
+function getLessOptions(loaderContext, loaderOptions, implementation) {
+  const options = typeof loaderOptions.lessOptions === "function" ? loaderOptions.lessOptions(loaderContext) || {} : loaderOptions.lessOptions || {};
+  const lessOptions = {
+    plugins: [],
+    relativeUrls: true,
+    // We need to set the filename because otherwise our WebpackFileManager will receive an undefined path for the entry
+    filename: loaderContext.resourcePath,
+    ...options
+  };
+  const plugins = lessOptions.plugins.slice();
+  const shouldUseWebpackImporter = typeof loaderOptions.webpackImporter === "boolean" ? loaderOptions.webpackImporter : true;
+  if (shouldUseWebpackImporter) {
+    plugins.unshift(createWebpackLessPlugin(loaderContext, implementation));
+  }
+  plugins.unshift({
+    install(lessProcessor, pluginManager) {
+      // eslint-disable-next-line no-param-reassign
+      pluginManager.webpackLoaderContext = loaderContext;
+      lessOptions.pluginManager = pluginManager;
+    }
+  });
+  lessOptions.plugins = plugins;
+  return lessOptions;
+}
+function isUnsupportedUrl(url) {
+  // Is Windows path
+  if (IS_NATIVE_WIN32_PATH.test(url)) {
+    return false;
+  }
+
+  // Scheme: https://tools.ietf.org/html/rfc3986#section-3.1
+  // Absolute URL: https://tools.ietf.org/html/rfc3986#section-4.3
+  return /^[a-zA-Z][a-zA-Z\d+\-.]*:/.test(url);
+}
+function normalizeSourceMap(map) {
+  const newMap = map;
+
+  // 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 newMap.file;
+
+  // eslint-disable-next-line no-param-reassign
+  newMap.sourceRoot = "";
+
+  // `less` returns POSIX paths, that's why we need to transform them back to native paths.
+  // eslint-disable-next-line no-param-reassign
+  newMap.sources = newMap.sources.map(source => _path.default.normalize(source));
+  return newMap;
+}
+function getLessImplementation(loaderContext, implementation) {
+  let resolvedImplementation = implementation;
+  if (!implementation || typeof implementation === "string") {
+    const lessImplPkg = implementation || "less";
+
+    // eslint-disable-next-line import/no-dynamic-require, global-require
+    resolvedImplementation = require(lessImplPkg);
+  }
+
+  // eslint-disable-next-line consistent-return
+  return resolvedImplementation;
+}
+function getFileExcerptIfPossible(error) {
+  if (typeof error.extract === "undefined") {
+    return [];
+  }
+  const excerpt = error.extract.slice(0, 2);
+  const column = Math.max(error.column - 1, 0);
+  if (typeof excerpt[0] === "undefined") {
+    excerpt.shift();
+  }
+  excerpt.push(`${new Array(column).join(" ")}^`);
+  return excerpt;
+}
+function errorFactory(error) {
+  const message = ["\n", ...getFileExcerptIfPossible(error), error.message.charAt(0).toUpperCase() + error.message.slice(1), error.filename ? `      Error in ${_path.default.normalize(error.filename)} (line ${error.line}, column ${error.column})` : ""].join("\n");
+  const obj = new Error(message, {
+    cause: error
+  });
+  obj.stack = null;
+  return obj;
+}