Quick 'n Dirty Gitlab Import script

gitlab_migration.rb

#!/usr/bin/env ruby

require 'httparty'
require 'json'

LEGACY_GIT = 'git@youroldgit.com'
GITLAB_URL = "hostname.yourdomain.com"
TOKEN = "YOUR_GITLAB_API_TOKEN"
DEFAULT_HTTP_OPTIONS = { headers: { 'Content-Type' => 'application/json' } }

def create_project(path)
  name = path.split("/").last
  group_name = path.split("/").first
  options = { body: { name: name, namespace_id: find_group_id(group_name), private_token: TOKEN }.to_json }.merge(DEFAULT_HTTP_OPTIONS)
  HTTParty.post("https://#{GITLAB_URL}/api/v3/projects", options)
end

def find_group_id(group_name)
  req = HTTParty.get("https://#{GITLAB_URL}/api/v3/groups", { search: group_name, private_token: TOKEN }.merge(DEFAULT_HTTP_OPTIONS))
  req.parsed_response.first['id']
end

def clone_old(repo_name)
  `git clone --mirror #{LEGACY_GIT}:#{repo_name}`
end

def push_new(repo_name, new_path)
  Dir.chdir "#{repo_name}.git" do
    `git remote add gitlab git@#{GITLAB_URL}:#{new_path}.git`
    `git push -f --tags gitlab refs/heads/*:refs/heads/*`
  end
end

File.open('mapping.txt').each do |line|
  old_name = line.split(' ').first
  new_path = line.split(' ').last

  p "#{old_name} to #{new_path}..."

  create_project(new_path)
  clone_old(old_name)
  push_new(old_name, new_path)
end