btrfs sub snap foo bar creates an exact same contents of subvolume foo as subvolume bar, except the subvolumes in foo, which are excluded in bar.

What I want is excluding some regular folders too from the output (bar), such as node_modules and tmp; just like rsync --exclude ....

There are several ways to make this happen, for example:

• Create a subvolume for the folders to be excluded. (Con: automatically generated folders can not be excluded as they are created regular folders, such as node_modules with this approach)
• Create a temporary subvolume, delete unwanted files/folders (Most promising approach)

Other than above, can we apply a programmatic filter while creating snapshots?

btrfs sub snap foo bar creates an exact same contents of subvolume foo as subvolume bar, except the subvolumes in foo.

What I want is excluding some regular folders too from the output (bar), such as node_modules and tmp; just like rsync --exclude ... does.

There are several ways to make this happen, for example:

• Create a subvolume for the each folder that is to be excluded. (Con: automatically generated folders can not be excluded as they are created as regular folders, such as node_modules in this scenario)
• Create a temporary subvolume, delete the unwanted files/folders (Most promising approach), then create the final subvolume from it.

Other than above, can we apply a programmatic filter while creating snapshots?