Repo-Splitter

split-folder.sh

#!/bin/bash

# $1 = Big repo
# $2 = Subfolder to split
# $3 = New organization
# $4 = New reponame

if [ $# -ne 4 ]; then
    echo "illegal number of parameters".
    echo-
    echo "Usage: split-folder.sh <big-repo> <subfolder-to-split> <new-org-name> <new-repo-name>"
    exit
fi

cd $1

echo "Splitting subtree"
git subtree split -P $2 -b master_$2

cd ..

mkdir $4

cd $4

echo "Initializing new repo"
git init
git pull ../$1 master_$2
echo "Killing old tags"
git tag -l | xargs git tag -d

git remote add github githubpriv:$3/$4

cd ..

echo "Cleaning out old module path"
cd $1

git rm -rf $2
git commit -m "Repo split off"

git filter-branch -f --prune-empty --tree-filter 'rm -rf $2' HEAD

rm -rf .git/refs/original/ && \
git reflog expire --all && \
git gc --aggressive --prune=now

git reflog expire --all --expire-unreachable=0
git repack -A -d
git prune

cd ..