Run #4275's TOC parser worked perfectly — found
/live/filesystem.squashfs as the largest file (983,547,904 bytes,
right where it should be) — but extraction still bailed:
diagnose: largest file in ... is /live/filesystem.squashfs; extracting
diagnose: could not extract rootfs from A
xorriso's -extract action requires -osirrox to be turned on at the
start of the command line; without it, -extract is silently rejected
("OSIRROX is not enabled by default. -osirrox on permits it."). Our
script swallowed stderr and the only signal was the empty output
file.
Two changes:
* Add `-osirrox on` to every -extract invocation.
* On extraction failure, surface the captured stderr (last 30
lines) into the workflow log instead of dropping it. Saves us
one round-trip if the next thing breaks.
ISO layout from the iter27 dump for the record:
/live/filesystem.squashfs 983547904 bytes ← rootfs
/live/initrd.img-... 62929840 bytes
/live/vmlinuz-... 12113856 bytes
/boot/grub/efi.img 3342336 bytes
/EFI/boot/{boot,grub}x64.efi
+ grub modules under /boot/grub/{i386-pc,x86_64-efi}/
The named-path probe for /live/filesystem.squashfs was already first
in the list — it'll succeed cleanly now and we skip the largest-file
fallback.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
SysAdmin
c8eac79afc