1 This project contains only the cpp/src files from upstream. To update: 2 git merge aosp/upstream-master 3 If upstream has changes outside the cpp/src directory (likely), it will get 4 conflicts on the modified files. To drop the changes to the unmerged 5 directories: 6 git rm -rf data 7 git rm -rf java 8 git rm -rf cpp/data 9 git rm -rf cpp/ext 10 git rm -rf cpp/tools 11 git commit 12