[git] move subtree inter projects

git_move_subtree.md

Git move subtree inter projects

• at repo-1

cd repo-1
git subtree split -P dir-to-move -b <split>

• at repo-2

cd repo-2
git checkout --orphan <temp>                    # Create a branch with no history
git pull <path-to-repo-1.git> <split>           # Pull the commits from the subtree
git checkout <branch>                           # Go back to the original branch (DONT use 'switch')
git merge --allow-unrelated-histories <temp>    # Merge the unrelated commits back
git branch -d <temp>                            # Delete the temporary branch