Webpack: Cannot stop webpack from caching my custom plugin.

[tuananhtd]

I'm using https://www.npmjs.com/package/babel-relay-plugin to make my custom loader in my project. Recently I ran into some issues with this loader and decided to debug by console.log something in the loader code. It turned out that I can only see the log once (after I remove the entire node_modules folder and npm install again). All the subsequence run produces no log. It seems clear to me that webpack cached something. When I put some syntax errors or even clear the entire loader code. Webpack still successfully bundle the files.
This is my config file:

var webpack = require('webpack');
var ExtractTextPlugin = require('extract-text-webpack-plugin');
var path = require('path');

var isProduction = process.env.NODE_ENV === 'production';

function concat() {
  return [].slice.call(arguments).reduce(function (arr, elems) {
    return elems ? arr.concat(elems) : arr;
  }, []);
}

function getJsLoader() {
  return {
    test: /.js$/,
    exclude: /node_modules/,
    loaders: concat(
      'babel?cacheDirectory=true&presets[]=es2015,presets[]=react,presets[]=stage-0,plugins[]=' + path.join(__dirname, 'babelRelayPlugin'),
      !isProduction && 'eslint'
    )
  };
}

function getCssLoader() {
  var module = {
    test: /\.css$/
  };
  var loaders = concat(
    !isProduction && 'style',
    'css?' + concat(
      'importLoaders=1',
      'localIdentName=[name]--[local]--[hash:base64:5]',
      'modules',
      isProduction && 'sourceMap'
    ).join('&')
  );
  if (isProduction) {
    module.loader = ExtractTextPlugin.extract(loaders.join('!'));
  } else {
    module.loaders = loaders;
  }
  return module;
}



module.exports = {
  entry: {
    app: path.resolve(__dirname, 'client'),
    vendor: [
      'react',
      'react-router'
    ]
  },

  output: {
    path: path.resolve(__dirname, '../build'),
    filename: 'scripts/app.js'
  },

  module: {
    loaders: [
      getJsLoader(),
      getCssLoader()
    ]
  },

  devtool: isProduction ? 'source-map' : 'eval',

  plugins: [
    new webpack.optimize.CommonsChunkPlugin('vendor', 'scripts/vendor.js')
  ].concat(!isProduction ? [] : [
    new ExtractTextPlugin('styles/main.css')
  ]),

  eslint: {
    configFile: path.resolve(__dirname, '../.eslintrc')
  },

  cache: false,
}

And this is my plugin for js loader:

//babelRelayPlugin
var getBabelRelayPlugin = require('babel-relay-plugin');
var schema = require('./schema.json');
module.exports = getBabelRelayPlugin(schema.data);

I run webpack with this webpack -p --progress --config src/webpack.config.js

A day of asking around and studying the webpack source code gave me no clue.
Hope that some one could help me!
PS: this problem seems only occur when the schema.json is big,

[tuananhtd]

It turns out that Babel loader is the one who cache things. Just need to set remove cacheDirectory=true.