Renaming a newly created directory throws "Trying to copy from a source that does not exist" error

[nfriend]

I'm trying to rename a folder in the destination directory. The directory structure inside my templates folder looks like this:

root/
├── generators
│   └── app
│       ├── templates
│       │   └── app
│       │       └── widget
│       │           ├── widget.controller.ts
│       │           ├── widget.service.ts
│       │           └── widget.module.ts
│       └── index.js
└── .yo-rc.json

I'm trying to rename the widget directory (in destinationPath) to a name that the user enters during the prompting stage. Here's how I'm attempting this:

module.exports = generators.Base.extend({
    copyAppTemplate: function () {
        this.fs.copyTpl(this.templatePath('**/*'), this.destinationPath('.'), this.props);

        this.fs.move(
            this.destinationPath('app/widget'),
            this.destinationPath('app/' + this.props.widgetName)
        );
    }
})

The call to copyTpl is correctly scaffolding and templating the app from the templatePath to the destinationPath. However, when the fs.move operation is called, I get the following error message:

PS C:\Users\username\code\generator-dashboard-widget-test> yo dashboard-widget
? Your widget's name: (generator-dashboard-widget-test)
? Your widget's name: generator-dashboard-widget-test

events.js:154
      throw er; // Unhandled 'error' event
      ^
 AssertionError: Trying to copy from a source that does not exist: C:\Users\username\code\generator-dashboard-widget-test\app\widget
    at EditionInterface.exports._copySingle (C:\Users\username\code\generator-dashboard-widget\node_modules\mem-fs-editor\lib\actions\copy.js:45:3)
    at EditionInterface.exports.copy (C:\Users\username\code\generator-dashboard-widget\node_modules\mem-fs-editor\lib\actions\copy.js:23:17)
    at EditionInterface.module.exports [as move] (C:\Users\username\code\generator-dashboard-widget\node_modules\mem-fs-editor\lib\actions\move.js:4:8)
    at module.exports.generators.Base.extend.copyAppTemplate (C:\Users\username\code\generator-dashboard-widget\generators\app\index.js:54:17)
    at Object.<anonymous> (C:\Users\username\code\generator-dashboard-widget\node_modules\yeoman-generator\lib\base.js:431:23)
    at C:\Users\username\code\generator-dashboard-widget\node_modules\run-async\index.js:26:25
    at C:\Users\username\code\generator-dashboard-widget\node_modules\run-async\index.js:25:19
    at C:\Users\username\code\generator-dashboard-widget\node_modules\yeoman-generator\lib\base.js:432:9
    at processImmediate [as _immediateCallback] (timers.js:383:17)

From what I understand from the Yeoman file system documenation, all actions on the virtual file system are synchronous, so the app/widget directory should exist before the mem-fs-editor instance attempts to move it.

Is there a different way I should be renaming the directory?

Here's some debug info:

1.8.4
C:\ProgramData\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\Sy
stem32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Intel\W
iFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Program Files\Sa
feNet\Authentication\SAC\x64;C:\Program Files\SafeNet\Authentication\SAC\x32;C:\
Program Files\Microsoft SQL Server\120\Tools\Binn\;C:\Users\username\AppData\Roa
ming\nvm;C:\Program Files\nodejs;C:\Program Files (x86)\sbt\\bin;C:\Program File
s\Git\cmd;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files
 (x86)\Bitvise SSH Client;C:\Python27;C:\Program Files (x86)\Windows Kits\8.1\Wi
ndows Performance Toolkit\;C:\Program Files (x86)\PDFtk Server\bin\;C:\Program F
iles (x86)\Microsoft VS Code\bin;C:\Users\username\AppData\Roaming\npm;C:\Users\
username\AppData\Roaming\nvm;C:\Program Files\nodejs;C:\Users\username\AppData\L
ocal\atom\bin %NODE_PATH%
win32 { http_parser: '2.6.1',
  node: '5.6.0',
  v8: '4.6.85.31',
  uv: '1.8.0',
  zlib: '1.2.8',
  ares: '1.10.1-DEV',
  icu: '56.1',
  modules: '47',
  openssl: '1.0.2f' }
The system cannot find the file specified.

I'm on Windows 8.1.

[nfriend]

Update: I was able to accomplish what I wanted by registering the gulp-rename plugin as a transform stream:

copyAppTemplate: function () {
    var _this = this;
    this.registerTransformStream(rename(function (path) {
        path.dirname = path.dirname.replace('widget', _this.props.widgetName);
        path.basename = path.basename.replace('widget', _this.props.widgetName);
        return path;
    }));

    this.fs.copyTpl(this.templatePath('**/*'), this.destinationPath('.'), this.props);
},

[SBoudrias]

I think the issue is the virtual file system doesn't store references to folders. It might work using a glob pattern, but I'm not sure glob matching if going to work over the virtual files.

This is a bug.

Would you mind reopening on the relevant repo https://github.com/SBoudrias/mem-fs-editor

Yo is only the UI layer, the ticket is going to get lost if it stays here.

[nfriend]

Thanks for the response. I've created a similar issue on the mem-fs-editor repo: SBoudrias/mem-fs-editor#61