rofiles-fuse - Use FUSE to create a view where directories are writable, files are immutable

       Creating a checkout from an OSTree repository by default uses hard links, which means an in-place
       mutation to any file corrupts the repository and all checkouts. This can be problematic if one wishes to
       run arbitrary programs against such a checkout. For example, RPM %post scripts or equivalent.

       In the case where one wants to create a tree commit derived from other content, using rofiles-fuse in
       concert with ostreecommit--link-checkout-speedup (or the underlying API) can ensure that only new files
       are checksummed.

           # Initialize a checkout and mount
           $ ostree --repo=repo checkout somebranch branch-checkout
           $ mkdir mnt
           $ rofiles-fuse branch-checkout mnt

           # Now, arbitrary changes to mnt/ are reflected in branch-checkout
           $ echo somenewcontent > mnt/anewfile
           $ mkdir mnt/anewdir
           $ rm mnt/someoriginalcontent -rf

           # Commit and cleanup
           $ fusermount -u mnt
           $ ostree --repo=repo commit --link-checkout-speedup -b somebranch -s 'Commit new content' --tree=dir=branch-checkout
           $ rm mnt branch-checkout -rf

       rofiles-fuse - Use FUSE to create a view where directories are writable, files are immutable

ostree(1)

rofiles-fuse                                                                                     ROFILES-FUSE(1)

rofiles-fuseSRCDIRMNTPOINT