Move Git Files with History Preservation

git-mv-with-history.sh

mkdir ~/dirswap && cd ~/dirswap
git clone repo1.git && cd repo1
# My use case: repo1/chart -> repo2/appname (mv < migration)
mv chart appname
git commit -am "chore: migrating helm chart to charts repo"
git filter-repo --path-rename chart/:appname/ --force
mkdir /tmp/mergepatches
export REPOSRC=appname    # (or srcfile.go if moving a file)
git format-patch -o /tmp/mergepatches $(git log $REPOSRC|grep ^commit|tail -1|awk '{print $2}')^..HEAD $REPOSRC
cd ~/dirswap
git clone repo2.git && cd repo2
git am /tmp/mergepatches/*.patch