btrm is a helper script to quickly find and remove specific files for directories across all snapshots on btrfs.
No longer do you have to delete full snapshots just to free up space, just delete that specific file across all subvolumes.
Usage
Usage: ./btrm -s <snapshot-dir> -f <file-to-remove>
-s <snapshot-dir> Path to Snapper snapshots directory
-f <file-to-remove> Relative path from snapshot-dir to the file
-h Show this message
snapshot-dir should be the path to the root of your snapshots (e.g. /.snapshots, /home/.snapshots)
file-to-remove is a path relative from snapshot-dir for the file to remove.
Let's say I have snapshots that that contain a file /home/jason/foo/bar. If I wanted to remove bar from every snapshot, the command would be as follows:
btrm -s /home/.snapshots -f foo/bar
This will remove bar, but keep foo.
It takes into account if your snapshot is read-only and sets it back if it was.
I have not done extensive testing. Ut may not work correctly, but so far has worked for my use cases.