Yeoman - How to extract zipped files in generator?

Question

I want to build a Yeoman generator that needs to unzip a file.

From their documentation, it seems this process is done using this.registerTransformStream(...). It says it accept any gulp plugin, so I tried gulp-unzip (link)

Here's my code:

// index.js
...
writing: function() {
  var source = this.templatePath('zip'); // the folder where the zipped file is
  var destination = this.destinationRoot();

  this.fs.copy(source, destination);
  this.registerTransformStream(unzip() );
}
...

The result seems promising, first it shows all the file list then I get Error: write after end error.

Here's the dump:

   create license.txt
   create readme.html
   create config.php
   ...
   ...
events.js:141
      throw er; // Unhandled 'error' event
      ^

Error: write after end
    at writeAfterEnd (C:\Users\myname\Documents\project\generator-test\node_modules\gulp-unzip\node_modules\readable-stream\lib\_stream_writable.js:144:12)
    at Transform.Writable.write (C:\Users\myname\Documents\project\generator-test\node_modules\gulp-unzip\node_modules\readable-stream\lib\_stream_writable.js:192:5)
    at DestroyableTransform.ondata (C:\Users\myname\Documents\project\generator-test\node_modules\through2\node_modules\readable-stream\lib\_stream_readable.js:531:20)
    at emitOne (events.js:77:13)
    at DestroyableTransform.emit (events.js:169:7)
    at readableAddChunk (C:\Users\myname\Documents\project\generator-test\node_modules\through2\node_modules\readable-stream\lib\_stream_readable.js:198:18)
    at DestroyableTransform.Readable.push (C:\Users\myname\Documents\project\generator-test\node_modules\through2\node_modules\readable-stream\lib\_stream_readable.js:157:10)
    at DestroyableTransform.Transform.push (C:\Users\myname\Documents\project\generator-test\node_modules\through2\node_modules\readable-stream\lib\_stream_transform.js:123:32)
    at DestroyableTransform._transform (C:\Users\myname\Documents\project\generator-test\node_modules\mem-fs-editor\lib\actions\commit.js:34:12)
    at DestroyableTransform.Transform._read (C:\Users\myname\Documents\project\generator-test\node_modules\through2\node_modules\readable-stream\lib\_stream_transform.js:159:10)

The destination folder is empty after this. It seems the stream is trying to write the unzipped file but failed.

Does anyone solved this problem before? Or is there alternative way by just using the built-in fs?

Thanks a lot

Everywhere

Personally, I think it would be easier for you to manually unzip the file using a Node.js package. Yeoman is only javascript code running, so no need to find a Yeoman related helper. Any node code will works inside the generator framework. – Degrease

@SimonBoudrias Sorry for the late reply. Yeoman uses mem-fs, so the zip file doesn't exist until all finished. I can't find a way to target that file using something like node-unzip since mem-fs doesn't seem to have callback too. – Everywhere

no need to copy the zip file with mem-fs if you just want to unzip the content. – Degrease

@SimonBoudrias I finally found a way to still use the built-in copy. We can add callback by using commit. Inside the callback, I unzip it with adm-zip package. Thanks for your input :). I can give you the bounty if you want. Just put answer mentioning that. – Everywhere