QEMU custom arguments cannot contain spaces.

[adespoton]

Describe the issue
When putting paths or parameters into a QEMU argument, UTM's parser appears to use spaces as breaks, no matter whether the string is single or double quoted or the spaces are escaped.
So "path/to this/file.qcow2", 'path/to this/file.qcow2' and path/to\ this/file.qcow2 all break.

While drive paths can be handled by removing the actual spaces in file names and directory names, setting a device label to a product string containing spaces is a bigger issue, such as:

-device scsi-cd,scsi-id=3,drive=cd1,vendor="MATSHITA",product="CD-ROM CR-8005",ver="1.0k"

UTM will split this at CD-ROM, which results in an error when you attempt to run the VM. Of course, the hardware in question won't recognize the CD-ROM drive without this label, so it can't just be modified to remove the space.

Configuration

• UTM Version: 2.x and 3.x up to 3.0.4
• OS Version: macOS 12.2
• Apple Silicon

[osy]

We currently support quotes at the start and end of an argument but not in middle of one https://github.com/utmapp/UTM/blob/master/Managers/UTMQemuSystem.m#L703

[adespoton]

Wouldn't it make more sense to split at \S- instead of at \S? QEMU requires argument markers for all arguments.