Checklist

• I've looked through the issues and pull requests for similar reports

Describe your issue

DOCKER_OPTS isn't parsed correctly, splitting on white-space which causes issues in some cases.

What target(s) are you cross-compiling for?

other (specify in description)

Which operating system is the host (e.g computer cross is on) running?

• macOS
• Windows
• Linux / BSD
• other OS (specify in description)

What architecture is the host?

• x86_64 / AMD64
• arm32
• arm64 (including Mac M1)

What container engine is cross using?

• docker
• podman
• other container engine (specify in description)

cross version

cross 0.2.1 (ee2fc1b 2022-06-08)

Example

Running the following command will produce docker options such as the following:

Command

DOCKER_OPTS='-v "/mnt/c/Program Files/Git":/git' CROSS_CONTAINER_ENGINE=podman \
    cross build --target mips64-unknown-linux-gnuabi64 --verbose

Parsed

["-v", "\"/mnt/c/Program", "Files/Git\":/git"]

Likewise, explicitly setting DOCKER_OPTS to an empty string (a valid option) gives us the following, which is invalid:

[""]

Additional information / notes

No response