Build fails if file/directory paths contains whitespaces

[Steve-0628]

Describe the bug
rush build doesn't work on macos

To Reproduce
Steps to reproduce the behavior:

1. Make a project
2. Run rush build to build it
3. Get an error

Expected behavior
It should be built, as nothing is changed.

Screenshots
(Sorry for the japanese screenshot)

javac: Support/.../classes is an invalid flag. 
Usage: javac <options> <source files>
Use -help to view all options

Desktop (please complete the following information):

• OS: macOS Big Sur 11.4 (20F71)
• Rush Version v1.2.4

Additional context
It seems like it is using "Application Support" folder which contains space in it, so javac is complaining about it.

[shreyashsaitwal]

Thanks for reporting this. Yes, you're correct, javac is complaining because of the whitespace in the directory path. Here's a workaround until I ship a new release fixing this:

1. Copy/Move everything inside the Application Support/rush directory to a place whose path has no whitespace. For e.g., /home/rush.
2. Then, export the RUSH_DATA_DIR environment variable and set its value as the path of the previously moved directory.
3. Build your extension with rush build.