- killed `[[ $ROOTFS_TYPE != ext4 ]] && display_alert "Assuming ${BOARD} ${BRANCH} kernel supports ${ROOTFS_TYPE}" "" "wrn"`
- which definitely didn't belong in rootfs
- disable usage of run_host_command_logged_long_running for kernel-make
- stop lying about long_running stuff being any different from non-long_running versions
- stop lying about 'set -e' when there's still a bunch of pipes for "pv" and stuff all around
- make `tmpfs_estimated_size` and `available_physical_memory_mib` readonly and global and only ever set once
- remove subshell from `get_rootfs_cache_list()`, new version `get_rootfs_cache_list_into_array_variable()` for sanity
- warns if `ROOT_FS_CREATE_ONLY=yes` is set during cached build path
- add a `wait_for_disk_sync()` after restoring rootfs cache
- fix logging sections for `build_rootfs_only()` and `prepare_rootfs_build_params_and_trap()` in `build_rootfs_and_image()`
- remove the logging section from `get_or_create_rootfs_cache_chroot_sdcard()` call in `build_rootfs_only()` (which is now itself logged)
- @TODO: `deploy_qemu_binary_to_chroot()` is leaking a qemu bin in rootfs cache!
- _told ya it would all make sense eventually..._
- introduce new, real, non-alias `rootfs` command in `cli-rootfs` -- this _only_ builds rootfs, nothing else
- no more `main_default_build_single()`; instead `full_build_packages_rootfs_and_image()`
- introduce `do_with_default_build()` wrapper, for things that need host prepared + aggregation to run
- CLI-specific parts of `main_default_build_single()` moved to cli-build
- put prepare/cleanup pair of `prepare_rootfs_build_params_and_trap()` and `trap_handler_cleanup_rootfs_and_image()` into new `trap-rootfs.sh` (this needs further splitting for the image part)
- refactor `get_or_create_rootfs_cache_chroot_sdcard()` into `build_rootfs_only()`, `calculate_rootfs_cache_id()`
- update library with new files
