Question: How to recover from a corrupted ostree repo? about bazzite HOT 1 CLOSED

Ended up extracting file objects directly from container image instead. Much easier and safer.

1. Mount the root partition somewhere, e.g. /mnt/sysroot (not directly using / because it's read-only and dangerous).
2. If you've previously ran sudo ostree fsck --delete and marked some commits as partial, revert it by sudo rm /mnt/sysroot/ostree/repo/state/*.commitpartial
3. Run sudo ostree fsck --repo /mnt/sysroot/ostree/repo --all and note down the corrupted file objects (i.e. the "expected" hash)
4. Download and extract the image (make sure you have enough free space per system requirements of Fedora):

ostree --repo=tmp-repo init && sudo ostree container image pull tmp-repo ostree-unverified-image:docker://ghcr.io/ublue-os/bazzite-deck:38

Didn't find a way to not use sudo at the moment since ostree will try to checkout files which are owned by root in the image; performing chmod or chown on the repository is also not recommended since they will corrupt file objects immediately
5. Locate the file objects you need in the tmp-repo/objects folder. Path to the object is determined by the hash which is split into two parts, first 2 letters is in the folder name and remaining letters in the file name with the extension .file
6. And copy the file objects back to your system at /mnt/sysroot/ostree/repo/objects/

from bazzite.