Test data is a manually fabricated build graph of gn.
gn at 501b49a3ab4f0d099457b6e5b62c709a1d2311be
git clone https://gn.googlesource.com/gn cd gn git checkout 501b49a3ab4f0d099457b6e5b62c709a1d2311be python build/gen.py ninja -C out gn cp out/.ninja_log ninja_lot ninja -C out -t compdb > compdb.json ninja -C out -t graph gn > graph.dot # Then manually simplify the graph.