feat(rustup-init/sh): add env var to print arch detection result #4183
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This PR tries to achieve #3830's goal...
... but in a more proper way:
This is inspired by
rustc
's own dry-run mode which is controlled by the--print=<field>
option, but I made it an env var instead because./rustup-init.sh --help
is always redirected to./rustup-init --help
as you might have noticed.In the future we could possibly add support for more info if needed.
cc @onur-ozkan for review, and I'm really sorry for the huge delay! 🙇