fix: persist dtbo + kernel postinst hook for Ubuntu flash-kernel survival - #85
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…ival On Ubuntu, flash-kernel rotates overlay directories (current/ <-> old/) on kernel updates, stranding custom dtbos. Changes: - Main install path: after copying dtbo to overlay dir, also persist to /usr/local/share/sunfounder/overlays/ and install postinst.d hook - Plugin-only path (--pipower5): same persist + hook logic - All pironman5 variants covered: base, max, mini, nas, pro_max - Covers pipower5 dtbo when installed with --pipower5 flag The postinst hook is shared with pipower5 — both projects write to the same persistent directory and install the same hook script. Works correctly when both are installed (dtbos coexist).
Avoids shell glob expansion of * in /boot/firmware/*/overlays/ path
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Problem
On Ubuntu, flash-kernel rotates overlay directories (
current/↔old/) on kernel updates, stranding custom dtbos. After a kernel update, pironman5/pipower5 dtbos are left inold/overlays/and the activecurrent/overlays/doesn't have them.Fix
/usr/local/share/sunfounder/overlays/and install/etc/kernel/postinst.d/sunfounder-dtboshook--pipower5): same persist + hook logic--pipower5flagThe postinst hook is shared with pipower5 (sunfounder/pipower5#16). Both projects write to the same persistent directory and install the same hook script. Works correctly when both are installed — dtbos coexist, uninstall only removes its own.
Tested
Tested together with pipower5 PR #16 on Ubuntu 26.04 aarch64 (Pi 5):