Grunt build folder whose name is passed in command?

Question

I have a folder structure like:

folder 1
---build
---src

folder 2
---build
---src

Now, the grunt command should be such that:

grunt build <folder_name>

so that it builds the particular folder. Copies the code from src to build inside the folder. Example,

grunt build folder 1

Is there any way to do this? I checked passing arguments, but that is the last option.

Do we have grunt plugins are there for this purpose.

Also if possible we can have,

grunt build:folder 1

These are the two ways I am supposed to write grunt commands.