index.js

/**
 * Original code credit to Alexandre Kirszenberg. Only modifications made were
 * to fit into newer Webpack plugin structure and publish as an npm module.
 *
 * @see https://gist.github.com/Morhaus/333579c2a5b4db644bd5
 */

var path = require('path');
var fs = require('fs');
var _ = require('lodash');

var reIgnore = /dev\-server|hot\-middleware/;

function ForceCaseSensitivityPlugin() {
  //no-op
}

ForceCaseSensitivityPlugin.prototype.apply = function(compiler) {
  compiler.plugin('normal-module-factory', function(nmf) {
    nmf.plugin('after-resolve', function(data, done) {
      if (reIgnore.test(data.resource)) {
        done(null, data);
        return;
      }
      var parentDir = path.dirname(data.resource);
      var resourceName = path.basename(data.resource);
      fs.readdir(parentDir, function(err, files) {
        if (err) {
          return done(err);
        }
        if (files.indexOf(resourceName) === -1) {
          var realName = _.find(files, function(filename) {
            return filename.toLowerCase() === resourceName.toLowerCase()
          });
          done(new Error('ForceCaseSensitivityPlugin: `' + resourceName + '` does not match the corresponding file on disk `' + realName + '`'));
          return;
        }
        done(null, data);
      });
    });
  });
};

module.exports = ForceCaseSensitivityPlugin;