Script for transferring repositories from Bitbucket to GitHub

transfer_repo.sh

#!/bin/bash

# Check if the correct number of arguments is provided
if [ "$#" -ne 2 ]; then
    echo "Usage: $0 /path/to/your/bitbucket/repo https://github.com/yourusername/yournewrepo.git"
    exit 1
fi

# Variables
BITBUCKET_REPO_PATH=$1
GITHUB_URL=$2
GITHUB_REMOTE="github"
BITBUCKET_REMOTE="bitbucket"

# Ensure you are in the correct repository directory
cd "$BITBUCKET_REPO_PATH" || { echo "Directory $BITBUCKET_REPO_PATH not found"; exit 1; }

# Backup the existing .git folder
echo "Creating a backup of the existing .git/config file..."
cp -r .git/config .git/config.bak
echo "Backup git config file created at .git/config.bak."

echo "▶️ Cleaning up deleted remote branches and respective local branches..."

# Fetch updates from the remote and prune branches that no longer exist on the remote
git fetch --prune
git remote prune origin

# List local branches that are tracking deleted remote branches
branches_to_delete=$(git branch -vv | grep ': gone]' | awk '{print $1}')

# Delete each local branch that is tracking a deleted remote branch
for branch in $branches_to_delete; do
    echo ""
    echo "Deleting local branch: $branch"
    git branch -d "$branch" || git branch -D "$branch"
done

echo "✓ Cleanup complete."

# Fetch all branches from Bitbucket
git fetch --all

# Add GitHub remote
echo "▶️ Pull the latest changes from Bitbucket and push them to GitHub..."

git remote add $GITHUB_REMOTE "$GITHUB_URL"

# Pull the latest changes for all branches and push them to GitHub
for branch in $(git branch -r | grep -v '\->' | sed 's/origin\///g'); do
    # Ensure the working directory is clean before checking out
    echo " ⦿ Resetting the working directory for branch $branch..."
    git reset --hard
    git clean -fd

    # Force checkout the branch locally, creating it if it doesn't exist
    if git show-ref --verify --quiet refs/heads/"$branch"; then
        echo "Branch '$branch' already exists locally. Force checking out and updating..."
        git checkout -f "$branch"
    else
        echo "Branch '$branch' does not exist locally. Creating and checking out..."
        git checkout --track origin/"$branch"
    fi

    # Pull the latest changes from Bitbucket
    git pull origin "$branch"

    # Push the branch to GitHub
    git push -u "$GITHUB_REMOTE" "$branch"
    echo ""

    # Add a small delay to ensure operations complete
    sleep 2
done

echo "✓ All branches have been pushed to GitHub."

# Push all tags to GitHub
echo "▶️ Pushing tags to GitHub..."
git push "$GITHUB_REMOTE" --tags

echo "✓ All tags have been pushed to GitHub."

echo "▶️ Checking out the default branch $DEFAULT_BRANCH..."

# Detect the current default branch name from Bitbucket remote
DEFAULT_BRANCH=$(git remote show origin | grep 'HEAD branch' | awk '{print $NF}')

# Ensure the working directory is clean before checking out the default branch
git reset --hard
git clean -fd

# Set local default branch as the default branch
git checkout -f "$DEFAULT_BRANCH"

echo "✓ All branches and tags have been pushed to GitHub. The default branch is $DEFAULT_BRANCH."

echo "▶️ Renaming remotes..."

# Rename remotes
git remote rename origin $BITBUCKET_REMOTE
git remote rename $GITHUB_REMOTE origin

echo "✓ The remote names have been changed"

# Verify the remote URLs
git remote -v