That works ok here: kbuntu 18.04 / Gimp 2.10.18
I did write the GEGL operations on separate lines in your script, rather than use /n linefeeds
The libgimp-2.0.so question.
A search libgimp-2.0.so + deb or + rpm gets a reference to the libgimp2.0-dev package which is not installed by default. Need to compile a plugin? Get the dev package.
example. https://packages.debian.org/search?suite...imp-2.0.so
Fedora / CentOS / Mageia, etc rpm packages the same. I think safe to assume the average linux user will have libgimp-2.0.so.0
I did write the GEGL operations on separate lines in your script, rather than use /n linefeeds
The libgimp-2.0.so question.
A search libgimp-2.0.so + deb or + rpm gets a reference to the libgimp2.0-dev package which is not installed by default. Need to compile a plugin? Get the dev package.
example. https://packages.debian.org/search?suite...imp-2.0.so
Fedora / CentOS / Mageia, etc rpm packages the same. I think safe to assume the average linux user will have libgimp-2.0.so.0