Deprecation warning with webpack 4

[tzimmermann]

Usingwebpack 4.1.1, I get this warning during webpack build:

(node:40693) DeprecationWarning: Tapable.plugin is deprecated. Use new API on.hooksinstead

With help of webpack/webpack#6568 (comment), I was able to trace the culprit to being the unused-files-webpack-plugin:

at UnusedFilesWebpackPlugin.apply (/Users/tz-mac/Repos/pex-client/node_modules/unused-files-webpack-plugin/lib/index__8.0.0__.js:105:14) at webpack (/Users/tz-mac/Repos/pex-client/node_modules/webpack/lib/webpack.js:37:12)

which refers to this line:

unused-files-webpack-plugin/lib/index__8.0.0__.js

Line 105 in e63a89c

compiler.plugin(`after-emit`, (compilation, done) =>

[oising]

Yeah, I had a similar issue in a build.ts used in the aurelia-cli build tasks. I know nothing about webpack internals, but I figured out enough to switch from using compiler.plugin('done', ...) to compiler.hooks.done.tap('done', ...) Your mileage may vary. Here's my code in context:

function buildWebpack(done) {
  if (CLIOptions.hasFlag('watch')) {
    compiler.watch({}, onBuild);
  } else {
    compiler.run(onBuild);
    //compiler.plugin('done', () => done());
    compiler.hooks.done.tap('done', () => done());
  }
}

[oising]

fyi, there is a compiler.hooks.afterEmit hook ;)

[Akiyamka]

Any chance this will be fixed?