79 lines
3.2 KiB
JavaScript
79 lines
3.2 KiB
JavaScript
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"use strict";
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const os = require("os");
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const utils = require("loader-utils");
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const cloneDeep = require("clone-deep");
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const path = require("path");
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const proxyCustomImporters = require("./proxyCustomImporters");
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/**
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* Derives the sass options from the loader context and normalizes its values with sane defaults.
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*
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* Please note: If loaderContext.query is an options object, it will be re-used across multiple invocations.
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* That's why we must not modify the object directly.
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*
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* @param {LoaderContext} loaderContext
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* @param {string} content
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* @param {Function} webpackImporter
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* @returns {Object}
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*/
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function normalizeOptions(loaderContext, content, webpackImporter) {
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const options = cloneDeep(utils.getOptions(loaderContext)) || {};
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const resourcePath = loaderContext.resourcePath;
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options.data = options.data ? (options.data + os.EOL + content) : content;
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// opt.outputStyle
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if (!options.outputStyle && loaderContext.minimize) {
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options.outputStyle = "compressed";
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}
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// opt.sourceMap
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// Not using the `this.sourceMap` flag because css source maps are different
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// @see https://github.com/webpack/css-loader/pull/40
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if (options.sourceMap) {
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// Deliberately overriding the sourceMap option here.
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// node-sass won't produce source maps if the data option is used and options.sourceMap is not a string.
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// In case it is a string, options.sourceMap should be a path where the source map is written.
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// But since we're using the data option, the source map will not actually be written, but
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// all paths in sourceMap.sources will be relative to that path.
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// Pretty complicated... :(
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options.sourceMap = path.join(process.cwd(), "/sass.map");
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if ("sourceMapRoot" in options === false) {
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options.sourceMapRoot = process.cwd();
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}
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if ("omitSourceMapUrl" in options === false) {
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// The source map url doesn't make sense because we don't know the output path
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// The css-loader will handle that for us
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options.omitSourceMapUrl = true;
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}
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if ("sourceMapContents" in options === false) {
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// If sourceMapContents option is not set, set it to true otherwise maps will be empty/null
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// when exported by webpack-extract-text-plugin.
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options.sourceMapContents = true;
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}
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}
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// indentedSyntax is a boolean flag.
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const ext = path.extname(resourcePath);
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// If we are compiling sass and indentedSyntax isn't set, automatically set it.
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if (ext && ext.toLowerCase() === ".sass" && "indentedSyntax" in options === false) {
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options.indentedSyntax = true;
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} else {
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options.indentedSyntax = Boolean(options.indentedSyntax);
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}
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// Allow passing custom importers to `node-sass`. Accepts `Function` or an array of `Function`s.
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options.importer = options.importer ? proxyCustomImporters(options.importer, resourcePath) : [];
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options.importer.push(webpackImporter);
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// `node-sass` uses `includePaths` to resolve `@import` paths. Append the currently processed file.
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options.includePaths = options.includePaths || [];
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options.includePaths.push(path.dirname(resourcePath));
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return options;
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}
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module.exports = normalizeOptions;
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