Method apply

src/index.js:467–496

(compiler)

  }

  apply (compiler) {
    this.workerPool = new WorkerPool({
      workerPath: require.resolve('./worker'),
      concurrency: this.options.concurrency
    });

    compiler.hooks.compilation.tap(NAME, compilation => {
      this.updateChunkHash(compilation);

      if (this.isWebpack5()) {
        compilation.hooks.processAssets.tapPromise({
          name: NAME,
          stage: this.webpack.Compilation.PROCESS_ASSETS_STAGE_OPTIMIZE
        }, (assets) => {
          const chunkFiles = Object.keys(assets);

          return this.optimize(compiler, compilation, chunkFiles);
        });
      } else {
        compilation.hooks.optimizeChunkAssets.tapPromise(NAME, (chunks) => {
          const chunkFiles = Array.from(chunks).reduce(
            (acc, chunk) => acc.concat(Array.from(chunk.files || [])),
            []
          );

          return this.optimize(compiler, compilation, chunkFiles);
        });
      }
    });
  }
}