I'm currently working on

pants_build_ignore

option which seems like

.gitignore

for pants

BUILD

files. Currently it's implemented as pants list option with default to '.*' (which stands for all directories and files with dot at the beginning). @happy-kitchen-89482 comes with suggestion to introduce

.pantsignore

file which will be the same as

.gitignore

for pants + option to specify path to this file. What do you prefer?