split_repo.sh script to automate git repo splitting

split_repo.sh

#!/bin/bash

if [ $# -eq 0 ]
  then
    echo "No arguments supplied, please use split_repo.sh FOLDER_NAME_TO_SAVE_AND_MOVE FROM_REPO TO_REPO"
    exit 1
fi

set -x

echo "checkout $2 to folder tmp-$1"

git clone $2 tmp-$1
cd tmp-$1

echo "Will leave source and history for $1 folder only"

git filter-branch --index-filter "git rm --cached -qr --ignore-unmatch -- . && git reset -q \$GIT_COMMIT -- $1*" --prune-empty -- --all

echo "Cleanup repo and files"

rm -rf .git/refs/original/
git reflog expire --all
git fsck --full --unreachable
git gc --aggressive --prune=now
 
git reflog expire --all --expire-unreachable=0
git repack -A -d
git prune

echo "Delete not needed files";


git clean -d -x -f
git reset --hard


#echo "List branches and tags, they should be moved manualy";
#git tag -l
#git branch -a


echo "Will move git origin to $3"

git remote set-url origin $3

echo "Push default branch to $3"
git push -u origin