Previously when doing a nixos-rebuild build-vm we see a message saying how to
run the VM, but with nixos-rebuild build-vm-with-bootloader we did not. We
now show it in both cases.
LPAE was enabled to support native armv7l builders running in QEMU on aarch64,
but this option disables support for processors which don't support LPAE, which
are still relatively common. In particular, Beaglebones use the Cortex-A8, which
doesn't support LPAE.
Also, if you attempt to boot an LPAE kernel on a CPU that doesn't support it,
it fails before even earlycon is initialized. This makes the problem difficult
to debug without enabling CONFIG_DEBUG_LL or using a hardware debugger.
Without this, failure of nixBuild() and nixFlakeBuild() was ignored
(since bash doesn't inherit 'set -e' in subshells by default), so the
script would proceed with a bogus ./result link, e.g.
++ readlink -f /tmp/nixos-rebuild.NfHKxx/result
+ pathToConfig='/nix/store/m7dvk6an18cpr95qn5wnig2600qhv6w7-nix-2.4pre20210727_706777a/bin/nix
/tmp/nixos-rebuild.NfHKxx/result'
+ '[' test = switch -o test = boot ']'
+ copyToTarget '/nix/store/m7dvk6an18cpr95qn5wnig2600qhv6w7-nix-2.4pre20210727_706777a/bin/nix
/tmp/nixos-rebuild.NfHKxx/result'
+ '[' '' = '' ']'
+ '[' test = switch -o test = boot -o test = test -o test = dry-activate ']'
+ targetHostCmd /nix/store/m7dvk6an18cpr95qn5wnig2600qhv6w7-nix-2.4pre20210727_706777a/bin/nix /tmp/nixos-rebuild.NfHKxx/result/bin/switch-to-configuration test
+ '[' -z '' ']'
+ sudo -- /nix/store/m7dvk6an18cpr95qn5wnig2600qhv6w7-nix-2.4pre20210727_706777a/bin/nix /tmp/nixos-rebuild.NfHKxx/result/bin/switch-to-configuration test
error: '/tmp/nixos-rebuild.NfHKxx/result/bin/switch-to-configuration' is not a recognised command
Try '/nix/store/m7dvk6an18cpr95qn5wnig2600qhv6w7-nix-2.4pre20210727_706777a/bin/nix --help' for more information.
+ echo 'warning: error(s) occurred while switching to the new configuration'
warning: error(s) occurred while switching to the new configuration
