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88 lines
3.4 KiB
88 lines
3.4 KiB
4 years 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 _loaderUtils = _interopRequireDefault(require("loader-utils"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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// Examples:
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// - ~package
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// - ~package/
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// - ~@org
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// - ~@org/
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// - ~@org/package
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// - ~@org/package/
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const matchModuleImport = /^~([^/]+|[^/]+\/|@[^/]+[/][^/]+|@[^/]+\/?|@[^/]+[/][^/]+\/)$/;
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/**
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* When libsass tries to resolve an import, it uses a special algorithm.
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* Since the sass-loader uses webpack to resolve the modules, we need to simulate that algorithm. This function
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* returns an array of import paths to try. The last entry in the array is always the original url
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* to enable straight-forward webpack.config aliases.
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*
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* @param {string} url
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* @returns {Array<string>}
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*/
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function importsToResolve(url) {
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const request = _loaderUtils.default.urlToRequest(url); // Keep in mind: ext can also be something like '.datepicker' when the true extension is omitted and the filename contains a dot.
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// @see https://github.com/webpack-contrib/sass-loader/issues/167
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const ext = _path.default.extname(request).toLowerCase(); // In case there is module request, send this to webpack resolver
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if (matchModuleImport.test(url)) {
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return [request, url];
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} // Because @import is also defined in CSS, Sass needs a way of compiling plain CSS @imports without trying to import the files at compile time.
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// To accomplish this, and to ensure SCSS is as much of a superset of CSS as possible, Sass will compile any @imports with the following characteristics to plain CSS imports:
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// - imports where the URL ends with .css.
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// - imports where the URL begins http:// or https://.
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// - imports where the URL is written as a url().
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// - imports that have media queries.
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//
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// The `node-sass` package sends `@import` ending on `.css` to importer, it is bug, so we skip resolve
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if (ext === '.css') {
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return [];
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}
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const dirname = _path.default.dirname(request);
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const basename = _path.default.basename(request); // In case there is file extension:
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//
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// 1. Try to resolve `_` file.
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// 2. Try to resolve file without `_`.
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// 3. Send a original url to webpack resolver, maybe it is alias.
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if (['.scss', '.sass'].includes(ext)) {
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return [`${dirname}/_${basename}`, `${dirname}/${basename}`, url];
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} // In case there is no file extension and filename starts with `_`:
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//
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// 1. Try to resolve files with `scss`, `sass` and `css` extensions.
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// 2. Try to resolve directory with `_index` or `index` filename.
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// 3. Send the original url to webpack resolver, maybe it's alias.
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if (basename.startsWith('_')) {
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return [`${request}.scss`, `${request}.sass`, `${request}.css`, request, url];
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} // In case there is no file extension and filename doesn't start with `_`:
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//
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// 1. Try to resolve file starts with `_` and with extensions
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// 2. Try to resolve file with extensions
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// 3. Try to resolve directory with `_index` or `index` filename.
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// 4. Send a original url to webpack resolver, maybe it is alias.
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return [`${dirname}/_${basename}.scss`, `${dirname}/_${basename}.sass`, `${dirname}/_${basename}.css`, `${request}.scss`, `${request}.sass`, `${request}.css`, request, url];
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}
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var _default = importsToResolve;
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exports.default = _default;
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