title: awesome-typescript-loader load / compile only refrenced files
body: <p>Is it possible to configure the awesome-typescript-loader or webpack or the tsc to just compile files that are referenced (directly, indirectly) from the entry? I want to port an existing application and want to be able to compile my partially ported code while some <strong>unreferenced</strong> files are not compilable.</p>
  
  <p><strong>Used tools</strong></p>
  
  <ul>
  <li>awesome-typescript-loader: 3.1.2,</li>
  <li>webpack: 2.3.3</li>
  </ul>
  
  <p><strong>webpack.js</strong></p>
  
  <pre><code>var webpack = require('webpack');
  module.exports = {
      entry: {
          'index': './Scripts/index.ts',
      },
  
      output: {
          path: helpers.root('dist'),
          filename: '[name].js'
      },
  
      resolve: {
          extensions: ['.ts', '.js']
      },
      module: {
          rules: [
              {
                  test: /.ts$/,
                  loader: 'awesome-typescript-loader'
              }
          ]
      }
  }
  </code></pre>
  
  <p><strong>tsconfig</strong></p>
  
  <pre><code>{
    "compilerOptions": {
      "target": "es5",
      "module": "commonjs",
      "moduleResolution": "node",
      "importHelpers": true,
      "typeRoots": [
        "node_modules/@types"
      ],
      "sourceMap": true,
      "lib": [
        "dom",
        "es5",
        "scripthost"
      ],
      "experimentalDecorators": true,
      "emitDecoratorMetadata": true,
      "noImplicitAny": false,
      "suppressImplicitAnyIndexErrors": true
    },
    "exclude": [
      "node_modules"
    ]
  }
  </code></pre>
  
  <p><strong>Error Messages</strong> (from files that are not referenced by index.ts)</p>
  
  <pre><code>[at-loader] Checking started in a separate process...
  
  [at-loader] Checking finished with 46 errors
  Hash: a2f6e7a56b152c02a325
  Version: webpack 2.3.3
  Time: 3554ms
     Asset     Size  Chunks             Chunk Names
  index.js  2.73 kB       0  [emitted]  index
     [0] ./Scripts/index.ts 79 bytes {0} [built]
  
  ERROR in [at-loader] ./Scripts/editor/foo.ts:47:61
      TS2448: Block-scoped variable 'eventList' used before its declaration.
  
  ... MORE ERRORS ...
  
  npm ERR! Windows_NT 10.0.14393
  npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "run" "build"
  npm ERR! node v6.9.2
  npm ERR! npm  v3.10.9
  npm ERR! code ELIFECYCLE
  npm ERR! FooBar@1.0.0 build: `webpack --config webpack.config.js`
  npm ERR! Exit status 2
  npm ERR!
  npm ERR! Failed at the FooBar@1.0.0 build script 'webpack --config webpack.config.js'.
  npm ERR! Make sure you have the latest version of node.js and npm installed.
  npm ERR! If you do, this is most likely a problem with the FooBar package,
  npm ERR! not with npm itself.
  npm ERR! Tell the author that this fails on your system:
  npm ERR!     webpack --config webpack.config.js
  npm ERR! You can get information on how to open an issue for this project with:
  npm ERR!     npm bugs FooBar
  npm ERR! Or if that isn't available, you can get their info via:
  npm ERR!     npm owner ls FooBar
  npm ERR! There is likely additional logging output above.
  
  npm ERR! Please include the following file with any support request:
  npm ERR!     D:\FooBar\npm-debug.log
  </code></pre>