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