1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
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;
|
