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2 years ago
'use strict';
var path = require('path');
var loaderUtils = require('loader-utils');
var process = require('./process');
/**
* Webpack loader that manipulates the source-map of a preceding loader.
* @this {object} The loader context
* @param {string} content The content
* @param {object} sourceMap The source-map
* @returns {string|String}
*/
function loader(content, sourceMap) {
/* jshint validthis:true */
// loader result is cacheable
this.cacheable();
// webpack 1: prefer loader query, else options object
// webpack 2: prefer loader options
// webpack 3: deprecate loader.options object
// webpack 4: loader.options no longer defined
var options = Object.assign(
{},
this.options && this.options.adjustSourcemapLoader,
loaderUtils.getOptions(this),
{sep: path.sep}
);
// process the source-map
var outputMap = process(this, options, sourceMap);
// need to use callback when there are multiple arguments
this.callback(null, content, outputMap);
}
module.exports = loader;