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node_modules/webpack/lib/CaseSensitiveModulesWarning.js 1.41 KB
aaac7fed   liuqimichale   add
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  /*
  	MIT License http://www.opensource.org/licenses/mit-license.php
  	Author Tobias Koppers @sokra
  */
  "use strict";
  
  const WebpackError = require("./WebpackError");
  
  module.exports = class CaseSensitiveModulesWarning extends WebpackError {
  	constructor(modules) {
  		super();
  
  		this.name = "CaseSensitiveModulesWarning";
  		const sortedModules = this._sort(modules);
  		const modulesList = this._moduleMessages(sortedModules);
  		this.message = "There are multiple modules with names that only differ in casing.\n" +
  			"This can lead to unexpected behavior when compiling on a filesystem with other case-semantic.\n" +
  			`Use equal casing. Compare these module identifiers:\n${modulesList}`;
  		this.origin = this.module = sortedModules[0];
  
  		Error.captureStackTrace(this, this.constructor);
  	}
  
  	_sort(modules) {
  		return modules.slice().sort((a, b) => {
  			a = a.identifier();
  			b = b.identifier();
  			/* istanbul ignore next */
  			if(a < b) return -1;
  			/* istanbul ignore next */
  			if(a > b) return 1;
  			/* istanbul ignore next */
  			return 0;
  		});
  	}
  
  	_moduleMessages(modules) {
  		return modules.map((m) => {
  			let message = `* ${m.identifier()}`;
  			const validReasons = m.reasons.filter((reason) => reason.module);
  
  			if(validReasons.length > 0) {
  				message += `\n    Used by ${validReasons.length} module(s), i. e.`;
  				message += `\n    ${validReasons[0].module.identifier()}`;
  			}
  			return message;
  		}).join("\n");
  	}
  };