plugin.js

/* globals Plugin */
import CssModulesBuildPlugin from './css-modules-build-plugin';
import pluginOptionsWrapper from './options';
import ImportPathHelpers from './helpers/import-path-helpers';

const pluginOptions = pluginOptionsWrapper.options;

ImportPathHelpers.init(Plugin);

if (pluginOptions.extensions.indexOf('css') === -1) {
  registerCompiler();
} else {
  monkeyPatchToHandleCssExtension();
}
global.cssModules = global.cssModules || {};
global.cssModules.compiler = new CssModulesBuildPlugin(Plugin);
function registerCompiler() {
  Plugin.registerCompiler({
    extensions: pluginOptions.extensions,
    archMatching: pluginOptions.specificArchitecture,
    filenames: pluginOptions.filenames
  }, function() {
    return new CssModulesBuildPlugin(Plugin);
  });
}

/**
 * Monkey patch _registerSourceProcessor and SourceProcessorSet.merge so we can block the default CSS compiler
 */
function monkeyPatchToHandleCssExtension() {
  const registerSourceProcessor = Plugin._registerSourceProcessor;
  Plugin._registerSourceProcessor = function(options, factory, { sourceProcessorSet, methodName, featurePackage }) {
    const buildPluginMerge = sourceProcessorSet.constructor.prototype.merge;
    sourceProcessorSet.constructor.prototype.merge = function(otherSet, options) {
      /* If a css plugin handler has already been added,
       * don't merge the meteor package, which only includes the 'css' package
       */
      if (otherSet._myPackageDisplayName !== 'meteor' || !('css' in this._byExtension)) {
        /* If we're using CSS modules inside of a package, it's possible that Meteor's CSS build plugin got merged
         * before we could block it. In that case, unregister the Meteor CSS processor.
         */
        if (('css' in this._byExtension) && 'css' in otherSet._byExtension) { // && sp.isopack.displayName() === 'meteor')
          const previouslyRegisteredSourceProcessor = this._byExtension.css[0];
          if (previouslyRegisteredSourceProcessor.isopack.displayName() === 'meteor' && otherSet._myPackageDisplayName === 'nathantreid:css-modules') {
            this.allSourceProcessors.splice(this.allSourceProcessors.indexOf(previouslyRegisteredSourceProcessor), 1);
            delete this._byExtension.css;
          }
        }
        buildPluginMerge.call(this, ...arguments);
      }
    };
    registerSourceProcessor(options, factory, { sourceProcessorSet, methodName, featurePackage });
  };

  registerCompiler();

  Plugin._registerSourceProcessor = registerSourceProcessor;
}