Migrate Bitbucket Repositories Under Project Keys to Github

migrate_bb_github.sh

#!/bin/bash

# Configuration
### Bitbucket configs
BITBUCKET_USERNAME="<fill this out>"
BITBUCKET_WORKSPACE="<fill this out>"
# Visit https://bitbucket.org/account/settings/app-passwords/
BITBUCKET_APP_PASSWORD="<fill this out>"

### Github Configs
GITHUB_USERNAME="<fill this out>"
# Visit https://github.com/settings/tokens
GITHUB_TOKEN="<fill this out>"
GITHUB_ORG="<fill this out>"  # Or your GitHub username if not using an organization

# Directories
LOCAL_CLONE_DIR="./cloned_repos"

# Create directory for cloned repositories if it does not exist
mkdir -p "$LOCAL_CLONE_DIR"

# Function to list Bitbucket repositories for a given project key
list_bitbucket_repos() {
    local project_key=$1
    local url="https://api.bitbucket.org/2.0/repositories/$BITBUCKET_WORKSPACE"
    local repos=()
    local params="q=project.key=\"$project_key\""

    while [ -n "$url" ]; do
        response=$(curl -s -u "$BITBUCKET_USERNAME:$BITBUCKET_APP_PASSWORD" "$url" --get --data-urlencode "$params")
        repos+=($(echo "$response" | jq -r '.values[].name'))
        url=$(echo "$response" | jq -r '.next // empty')
    done

    echo "${repos[@]}"
}

# Function to clone a repository from Bitbucket
clone_repository() {
    local repo_url=$1
    local local_path=$2

    if [ -d "$local_path" ]; then
        echo "Repository already exists locally at $local_path, skipping clone."
    else
        echo "Cloning repository $repo_url into $local_path"
        git clone "$repo_url" "$local_path" || { echo "Error cloning repository $repo_url"; return 1; }
    fi
}

# Function to create a new GitHub repository
create_github_repo() {
    local repo_name=$1
    local project_key=$2
    local payload="{\"name\":\"${project_key}-${repo_name}\",\"private\":true}"
    local url="https://api.github.com/user/repos"

    response=$(curl -s -o /dev/null -w "%{http_code}" -H "Authorization: token $GITHUB_TOKEN" -H "Content-Type: application/json" -d "$payload" "$url")

    if [ "$response" -eq 201 ]; then
        echo "Successfully created GitHub repository ${project_key}-${repo_name}"
    elif [ "$response" -eq 422 ]; then
        echo "GitHub repository ${project_key}-${repo_name} already exists, skipping creation."
    else
        echo "Error creating GitHub repository ${project_key}-${repo_name}: HTTP $response"
        return 1
    fi
}

# Function to push a local repository to GitHub
push_to_github() {
    local local_repo_path=$1
    local github_repo_url=$2

    cd "$local_repo_path" || { echo "Error accessing local repository $local_repo_path"; return 1; }
    git remote rm origin
    git remote add origin "$github_repo_url"
    git push -u origin --all || { echo "Error pushing repository $local_repo_path to $github_repo_url"; return 1; }
    cd - > /dev/null
}

# Main migration function
migrate_repositories() {
    local project_key=$1
    local repos=$(list_bitbucket_repos "$project_key")

    for repo_name in $repos; do
        local bitbucket_repo_url="https://$BITBUCKET_USERNAME:[email protected]/$BITBUCKET_WORKSPACE/$repo_name.git"
        local local_repo_path="$LOCAL_CLONE_DIR/$repo_name"
        local github_repo_url="https://$GITHUB_USERNAME:[email protected]/$GITHUB_ORG/${project_key}-${repo_name}.git"

        # Clone repository from Bitbucket
        clone_repository "$bitbucket_repo_url" "$local_repo_path"
        if [ $? -ne 0 ]; then
            continue
        fi

        # Create repository on GitHub
        create_github_repo "$repo_name" "$project_key"
        if [ $? -ne 0 ]; then
            continue
        fi

        # Push repository to GitHub
        push_to_github "$local_repo_path" "$github_repo_url"
        if [ $? -ne 0 ]; then
            continue
        fi
    done
}

# Run the migration
# Ex: bash -x migrate_bb_github.sh <Bitbucket-ProjectKey>
migrate_repositories "$1"