promisify-loader-runner

This is a promisify method of loader-runner https://github.com/webpack/loader-runner

and you can use both promisify or callback calling style

Usage

Promise

1import { runLoaders } from "promisify-loader-runner";
2
3try {
4  const result = await runLoaders({
5    resource: "/abs/path/to/file.txt?query",
6    loaders: ["/abs/path/to/loader.js?query"],
7    context: { minimize: true },
8    processResource: (loaderContext, resourcePath, callback) => { ... },
9    readResource: fs.readFile.bind(fs)
10  })
11} catch (err){
12  // err: Error?
13}

Callback (original way)

1import { runLoaders } from "promisify-loader-runner";
2
3runLoaders({
4 resource: "/abs/path/to/file.txt?query",
5 // String: Absolute path to the resource (optionally including query string)
6
7 loaders: ["/abs/path/to/loader.js?query"],
8 // String[]: Absolute paths to the loaders (optionally including query string)
9 // {loader, options}[]: Absolute paths to the loaders with options object
10
11 context: { minimize: true },
12 // Additional loader context which is used as base context
13
14 processResource: (loaderContext, resourcePath, callback) => { ... },
15 // Optional: A function to process the resource
16 // Must have signature function(context, path, function(err, buffer))
17 // By default readResource is used and the resource is added a fileDependency
18
19 readResource: fs.readFile.bind(fs)
20 // Optional: A function to read the resource
21 // Only used when 'processResource' is not provided
22 // Must have signature function(path, function(err, buffer))
23 // By default fs.readFile is used
24}, function(err, result) {
25 // err: Error?
26
27 // result.result: Buffer | String
28 // The result
29 // only available when no error occurred
30
31 // result.resourceBuffer: Buffer
32 // The raw resource as Buffer (useful for SourceMaps)
33 // only available when no error occurred
34
35 // result.cacheable: Bool
36 // Is the result cacheable or do it require reexecution?
37
38 // result.fileDependencies: String[]
39 // An array of paths (existing files) on which the result depends on
40
41 // result.missingDependencies: String[]
42 // An array of paths (not existing files) on which the result depends on
43
44 // result.contextDependencies: String[]
45 // An array of paths (directories) on which the result depends on
46})