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author | 2020-11-16 00:10:28 +0100 | |
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committer | 2020-11-16 00:10:28 +0100 | |
commit | e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch) | |
tree | 55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/sass-loader/lib/loader.js | |
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api, login, auth
Diffstat (limited to 'node_modules/sass-loader/lib/loader.js')
-rw-r--r-- | node_modules/sass-loader/lib/loader.js | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/node_modules/sass-loader/lib/loader.js b/node_modules/sass-loader/lib/loader.js new file mode 100644 index 0000000..0a1fcd7 --- /dev/null +++ b/node_modules/sass-loader/lib/loader.js @@ -0,0 +1,83 @@ +"use strict"; + +const sass = require("node-sass"); +const path = require("path"); +const async = require("neo-async"); +const formatSassError = require("./formatSassError"); +const webpackImporter = require("./webpackImporter"); +const normalizeOptions = require("./normalizeOptions"); +const pify = require("pify"); + +// This queue makes sure node-sass leaves one thread available for executing +// fs tasks when running the custom importer code. +// This can be removed as soon as node-sass implements a fix for this. +const threadPoolSize = process.env.UV_THREADPOOL_SIZE || 4; +const asyncSassJobQueue = async.queue(sass.render, threadPoolSize - 1); + +/** + * The sass-loader makes node-sass available to webpack modules. + * + * @this {LoaderContext} + * @param {string} content + */ +function sassLoader(content) { + const callback = this.async(); + const isSync = typeof callback !== "function"; + const self = this; + const resourcePath = this.resourcePath; + + function addNormalizedDependency(file) { + // node-sass returns POSIX paths + self.dependency(path.normalize(file)); + } + + if (isSync) { + throw new Error("Synchronous compilation is not supported anymore. See https://github.com/webpack-contrib/sass-loader/issues/333"); + } + + const options = normalizeOptions(this, content, webpackImporter( + resourcePath, + pify(this.resolve.bind(this)), + addNormalizedDependency + )); + + // Skip empty files, otherwise it will stop webpack, see issue #21 + if (options.data.trim() === "") { + callback(null, ""); + return; + } + + // start the actual rendering + asyncSassJobQueue.push(options, (err, result) => { + if (err) { + formatSassError(err, this.resourcePath); + err.file && this.dependency(err.file); + callback(err); + return; + } + + if (result.map && result.map !== "{}") { + 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. + delete result.map.file; + // The first source is 'stdin' according to 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 normalizeOptions, + // we know that this path is relative to process.cwd(). This is how node-sass works. + result.map.sources[0] = path.relative(process.cwd(), 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 + result.map.sourceRoot = path.normalize(result.map.sourceRoot); + result.map.sources = result.map.sources.map(path.normalize); + } else { + result.map = null; + } + + result.stats.includedFiles.forEach(addNormalizedDependency); + callback(null, result.css.toString(), result.map); + }); +} + +module.exports = sassLoader; |