This Bash script automates the migration of repositories from a Bitbucket organization to a GitHub organization, ensuring all branches and tags are transferred. It clones repositories with full mirroring, creates private repositories on GitHub, and pushes the content.

migrate-bitbucket-to-github.sh

#!/bin/bash

# Bitbucket settings
BITBUCKET_USER=""
BITBUCKET_ORG=""
BITBUCKET_APP_PASSWORD=""

# GitHub settings
GITHUB_USER=""
GITHUB_ORG=""
GITHUB_TOKEN=""

# Temporary directory for cloning repos
TEMP_DIR="./temp_repos"
mkdir -p $TEMP_DIR

# Get all repos from Bitbucket organization
BITBUCKET_REPOS=$(curl -s -u $BITBUCKET_USER:$BITBUCKET_APP_PASSWORD "https://api.bitbucket.org/2.0/repositories/$BITBUCKET_ORG?pagelen=100" | jq -r '.values[] | .full_name + " " + (.links.clone[] | select(.name == "https") .href)')

# Loop through each Bitbucket repo details
echo "$BITBUCKET_REPOS" | while read FULL_REPO_NAME REPO_URL
do
    REPO_NAME="${FULL_REPO_NAME#$BITBUCKET_ORG/}"

    # Modify REPO_URL to include authentication credentials
    AUTHENTICATED_REPO_URL="${REPO_URL/https:\/\/$BITBUCKET_USER@/https:\/\/$BITBUCKET_USER:$BITBUCKET_APP_PASSWORD@}"

    echo "Migrating: $AUTHENTICATED_REPO_URL"

    # Clone Bitbucket repo with mirroring
    git clone --mirror $AUTHENTICATED_REPO_URL $TEMP_DIR/$REPO_NAME

    # Create new repo on GitHub
    RESPONSE=$(curl -s -w "%{http_code}" -o /dev/null -u $GITHUB_USER:$GITHUB_TOKEN -X POST https://api.github.com/orgs/$GITHUB_ORG/repos -d "{\"name\":\"$REPO_NAME\", \"private\": true}")
    
    # Check if repo creation was successful
    if [ "$RESPONSE" -eq 201 ]; then
        echo "GitHub repository $REPO_NAME created successfully."

        # Change directory to cloned repo
        cd $TEMP_DIR/$REPO_NAME

        # Add GitHub repo as a new remote for mirror push
        git remote add github "https://$GITHUB_USER:[email protected]/$GITHUB_ORG/$REPO_NAME.git"

        # Push all branches and tags to GitHub
        git push github --mirror

        # Return to original directory
        cd -

        # Clean up local repo
        rm -rf $TEMP_DIR/$REPO_NAME

        echo "Migration of $REPO_NAME completed."
    else
        echo "Failed to create GitHub repository $REPO_NAME. HTTP status code: $RESPONSE"
    fi
done

echo "All repositories have been processed."