A qucik script to migrate repos from Bitbucket to Github

bitbucket2github.sh

#!/usr/bin/env bash

################################################################################
# bitbucket2github.sh
# Small script to migrate repos.
# Uses GitHub Personal Token to authenticate against api.github.com
# Takes as parameter an organization name (optional)
# Takes as parameter the name of the URL of the Bitbucket repo to migrate
# Assumes you have ssh/keybased connections established : 
#   eval "$(ssh-agent -s)" 
#   ssh-add ~/.ssh/my_bitbucket_key && ssh -T [email protected]
#   ssh-add ~/.ssh/my_github_key && ssh -T [email protected]
################################################################################

# Credentias to Github API, should come from previous setted (and not empty) ENV variables.
GITHUB_USERNAME=${ENV_GITHUB_USERNAME:-}
if [ -z "$GITHUB_USERNAME" ]; then
    echo "Please set (with a non empty value) the GITHUB_USERNAME environment variable"
    exit 1
fi

GITHUB_PERSONAL_TOKEN=${ENV_GITHUB_PERSONAL_TOKEN:-}
if [ -z "$GITHUB_PERSONAL_TOKEN" ]; then
    echo "Please set (with a non empty value) the GITHUB_PERSONAL_TOKEN environment variable"
    exit 1
fi

# Parse the input
while getopts o:r: flag
do
    case "${flag}" in
        o) organization=${OPTARG};;
        r) bitbucket_repository_url=${OPTARG};;
    esac
done

# Split the the bitbucket repo
repository_name=`grep -Po '\w\K/\w+[^?]+' <<< "${bitbucket_repository_url}" |  cut -d'/' -f3-  | sed 's-/$--'`
repository_owner=`grep -Po '\w\K/\w+[^?]+' <<< "${bitbucket_repository_url}" |  cut -d'/' -f2  | sed 's-/$--'`

if [ -z "$repository_name" ]; then
    echo "Could not extract the repository name from the URL: $bitbucket_repository_url"
    exit 1
fi

# Clone the bitbucket repo
echo "Cloning the Bitbucket repository: $bitbucket_repository_url"
[email protected]:${repository_owner}/${repository_name}.git
echo $ssh_bitbucket_repository_url

git clone --mirror ${ssh_bitbucket_repository_url} ${repository_name}
if [ $? -ne 0 ]; then
    echo "Error cloning the bitbucket repository"
    exit 1
fi

# Create the repo (org)
GITHUB_API_URL="https://api.github.com/orgs/${organization}/repos"
if [ -z "${organization}" ]; then # Non organization URL
    GITHUB_API_URL='https://api.github.com/user/repos'
fi

echo $GITHUB_API_URL
echo $GITHUB_PERSONAL_TOKEN
echo $repository_name
curl_http_response_code=$(curl -s -o /dev/null -i -w "%{http_code}"  -X POST -H "Accept: application/vnd.github.v3+json" -H "Authorization: token ${GITHUB_PERSONAL_TOKEN}" ${GITHUB_API_URL} -d "{\"name\":\"$repository_name\", \"private\":\"true\", \"description\":\"bitbucket2github.sh migrated the ${bitbucket_repository_url} repo.\" }")
if [ $curl_http_response_code -ne 201 ]; then
    echo "Error creating the github repository"
    exit 1
fi

# rename existing repo to avoid conflicts
git remote rename origin bitbucket
if [ $? -ne 0 ]; then
    echo "Error renaming origin"
    exit 1
fi

# set new Github repo as git remote
GITHUB_REMOTE_URL="[email protected]:${organization}/${repository_name}.git"
if [ -z "${organization}" ]; then # Non organization URL
    GITHUB_REMOTE_URL="[email protected]:${username}/${repository_name}.git"
fi
git remote add origin ${GITHUB_REMOTE_URL}
if [ $?0 -ne 0 ]; then
    echo "Error setting new origin"
    exit 1
fi

# push to new git repo
git push --mirror
if [ $? -ne 0 ]; then
    echo "Error pushing to new git"
    exit 1
fi

# remove old bitbucket
git remote rm bitbucket
if [ $? -ne 0 ]; then
    echo "Error removing old bitbucket"
    exit 1
fi

# Escaped back to parent folder and remove the cloned repo.
cd .. && rm -rf ${repository_name}