Cannot copy multiple directories into the same target directory

[benr77]

I've recently run in to a problem whereby I'm trying to copy the contents of two directories to the same target directory (in this case, FontAwesome and Glyphicon font files in to web/fonts)

"vendorCopy": [
    {
      "from": "node_modules/font-awesome/fonts",
      "to": "web/fonts/"
    },
    {
      "from": "node_modules/bootstrap/fonts",
      "to": "web/fonts/"
    }
  ]

Running this configuration resulted in the following (exceedingly helpful!) error message:

Failed to install vendor modules: undefined

After a lot of time spend debugging, it seems that vendor-copy cannot handle copying multiple directories into the same destination directory.

I could have specified each file individually, but this would have been really verbose and bloated my package.json.

My solution in the end has been to deploy one to web/fonts and the other to web/fonts2 and then use an additional command to move the contents of web/fonts2 into web/fonts

I've solved my problem for the moment, and am not sure if this is a bug or not, but hopefully for future Google searches this will help someone as it's cost me a few hours of pulling my hair out!