Clone a Git repository from source to destination.

clone-repo.sh

#!/bin/bash
set -ea

# Function to generate a random string for making a temp folder with our repo contents
function randomstring {
	echo $(openssl rand -base64 12)
}

# Check parameters
if [ "$#" -lt "2" ]; then
	echo "not enough arguments, specify the original repo and the repo to clone into"
	exit -1
fi

# Generate random dummy path locations to do our cloning in
folder1=/tmp/$(randomstring)
# Generate another random dummy path location to do our verification in
folder2=/tmp/$(randomstring)

# Do the actual backup operation
# The --mirror param helps us in the cloning
git clone --mirror $1 $folder1
cd $folder1
git remote add new-origin $2
git push new-origin --mirror

# Verify everything works
cd ..
git clone --mirror $2 $folder2
cd $folder2
success=0
if [ $(find $folder2 -maxdepth 0 -type d -empty 2>/dev/null) ]; then
	echo "git cloning was unsuccessful"
	success=-1
fi

# Cleanup after our mess
cd ..
rm -rf $folder1
rm -rf $folder2
exit $success