trash-put --force-another-volume: Flag to override blocking of trashing between volumes

[robomica]

I use ZFS snapshots, so I made a dataset just for stuff I don't want to back up and link disposable items to it.  

Here's the relevant datasets: $ zfs list -o name,mountpoint,mounted

NAME                                                  MOUNTPOINT       MOUNTED
zroot/encr/data/home                                  /home                yes
zroot/encr/disposable                                 /mnt/disposable      yes
...

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This works:

$ file ~/.local/share/Trash

/home/bird/.local/share/Trash: symbolic link to /home/bird/deleteme.d

$ trash-put -v ~/deleteme

trash-put: Volume of file: /home
trash-put: Trash-dir: /home/bird/.local/share/Trash from volume: /home
trash-put: 'deleteme' trashed in ~/.local/share/Trash

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However:

$ file ~./local/share/Trash

/home/bird/.local/share/Trash: symbolic link to /mnt/disposable/bird/Trash

$ trash-put -v ~/deleteme

trash-put: Volume of file: /home
trash-put: Trash-dir: /home/bird/.local/share/Trash from volume: /mnt/disposable
trash-put: found unusable .Trash dir (should be a dir): /home/.Trash
trash-put: Trash-dir: /home/.Trash-1000 from volume: /home
trash-put: Failed to trash deleteme in /home/.Trash-1000, because :[Errno 13] Permission denied: '/home/.Trash-1000'
trash-put: cannot trash regular empty file 'deleteme'

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There's nothing wrong with permissions or the link: $ touch ~/.local/share/Trash/deleteme $ ls /mnt/disposable/bird/Trash/deleteme

/mnt/disposable/bird/Trash/deleteme

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I also tested this with ext2 and by mounting directly to ~/.local/share/Trash to no avail.

I think this is reasonable default behavior and it's standards-compliant, but since the only workaround I can think of for this is to move or delete the Trash directory every time I need a snapshot, which is ridiculous, an override would be helpful. Maybe also another check and another flag to protect from and then override trashing of large files?