Script to move a git repo from one remote URL to another. Based on my fork of https://gist.github.com/markrickert/2919901

git-transfer.sh

#!/bin/bash

# Takes two parameters: origin and destination remote git repository URLs.
#
# This is the stuff this script does:
#
# 1. Clones the origin repository
# 2. Fetches all remote branches
# 3. Backs everything up to a tarball
# 4. Pushes all branches to the destination repository
# 5. Removes all files in the main branch from the origin repository
# 6. Writes a readme file with the new repo URL and pushes to the origin
# 7. Deletes the cloned working folder.
#
# Your origin remote repository's history is left untouched by this script.


if [ "$1" = "" ]
then
echo "Usage: $0 <origin repository clone URL> <destination repository clone URL>" 1>&2
exit 1
fi

# Variable definitions
ORIGINURL=$1
DESTURL=$2
ORIGINNAME=${ORIGINURL##*/}
FOLDERNAME=${ORIGINNAME%.git}
TARNAME="$FOLDERNAME.gitarchive.$(date +%Y%m%d).tgz"

# Clone the repos and go into the folder
git clone --recursive $ORIGINURL $FOLDERNAME
cd $FOLDERNAME 

BRANCHNAME="$(git symbolic-ref --short -q HEAD)"

# Pull all branches
git branch -r | grep -v HEAD | grep -v $BRANCHNAME | while read branch; do
  git branch --track ${branch##*/} $branch
done

# Pull all remote data and tags
git fetch --all
git fetch --tags
git pull --all
git gc # Cleanup unnecessary files and optimize the local repository

# Create an archive of the directory
cd ../
tar cfz "$TARNAME" "$FOLDERNAME/"

# now we can safely mess with it
cd $FOLDERNAME

# push everything to destination url
git remote add destination $DESTURL
git push destination --all
git push destination --tags

git remote rm destination

# replace all branches with destination URL README files
git branch -r | grep -v HEAD | while read branch; do
  git checkout ${branch##*/}
  # remove normal files. I wish these could be just one command.
  git rm -r *
  # remove dotfiles
  git rm -r *.*
  echo "Moved to $DESTURL" > README
  git add -A
  git commit -m "Replace README with new repo URL"
done

git push origin --all


# Remove the git clone
cd ../
rm -rf "./$FOLDERNAME"

echo "Done!"
echo "The repository at $ORIGINURL has been moved to $DESTURL"
echo "Your archived git repository is named $TARNAME"