git splitting repository by subfolder and retain all old branches

Question

I have a git repo with 2 directories and multiple branches, I want to split them and create all branches

`-- Big-repo
    |-- dir1
    `-- dir2

Branches : b         


        

Answer 1

This script does the job for me:

#!/bin/bash

set -e

if [ -z "$3" ]; then
        echo "usage: $0 /full/path/to/repository path/to/splitfolder/from/repository/root new_origin"
        exit
fi

repoDir=$1
folder=$2
newOrigin=$3

cd $repoDir

git checkout --detach
git branch | grep --invert-match "*" | xargs git branch -D

for remote in `git branch --remotes | grep --invert-match "\->"`
do
        git checkout --track $remote
        git add -vA *
        git commit -vam "Changes from $remote" || true
done

git remote remove origin
git filter-branch --prune-empty --subdirectory-filter $folder -- --all

#prune old objects
rm -rf .git/refs/original/*
git reflog expire --all --expire-unreachable=0
git repack -A -d
git prune

#upload to new remote
git remote add origin $newOrigin
git push origin master

for branch in `git branch | grep -v '\*'`
do
        git push origin $branch
done