I've brought this here to keep this discussion in a more relevant thread.
Using Slim's build source;
When I build the whole rom, that product_copy_files works as expected on the twrp.fstab.
When I "make -j# bootzip" I have to manually copy the twrp.fstab to the /out/recovery/boot/etc. I usually build the whole rom, so it hasn't been much of an issue, but it sounds like you made a change that allowed it to copy as expected?
Interesting ... I couldn't get PRODUCT_COPY_FILES to work on twrp.fstab. I wonder what I was doing wrong. I had to mess with the build/core/Makefile ;(
Using Slim's build source;
When I build the whole rom, that product_copy_files works as expected on the twrp.fstab.
When I "make -j# bootzip" I have to manually copy the twrp.fstab to the /out/recovery/boot/etc. I usually build the whole rom, so it hasn't been much of an issue, but it sounds like you made a change that allowed it to copy as expected?