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