Add Raspberry Pi OS rootfs creation #8245
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debootstrap will try to authenticate Debian-based repos against a locally installed Debian archive keyring, or Ubuntu-based repos against a locally installed Ubuntu archive keyring. If there's no keyring packages installed (as is the case in our CI) then the repos are blindly accepted without auth. However, if you have a keyring installed and use a "weird" repo which doesn't work with the expected default keyring (e.g. out of the box it'll try to authenticate the Raspbery Pi OS repo against the Debian keyring file) it fails. So, for our Rasbian case, a) specify the path to the known-good Raspbian archive keyring file and b) add a check where if a keyring is specified but does not exist, drop it. This allows building the Raspbian rootfs both locally on systems with debian-archive-keyring and in CI with no keyrings available. We should consider forcing keyring validation in general though, for better build integrity as a whole.
akoeplinger
approved these changes
Dec 6, 2021
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Is there a process here, or should I smash the merge button? |
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Raspberry Pi OS is the standard OS for use on Raspberry Pi single board computers. Primarily, it's a Debian distribution rebuilt to target ARMv6+VFPv2 instead of Debian's ARMv7+VFPv3-D16, to match the first-gen Raspberry Pi's Broadcom BCM2835 SoC.
Building anything (i.e. Hello World) using an ARMv7 crossrootfs will result in a SIGSEGV when executed on BCM2835.
Ref. dotnet/runtime#7764