module Bones::App::Git

def self.initialize_git
  Bones::App::Create.class_eval {
    include ::Bones::App::Git
    option
    option('Git Options:')
    option('--git', 'Initialize a git repository for the project.',
           lambda { config[:git] = true }
    )
    option('--github DESCRIPTION', 'Create a new GitHub project.',
           'Requires a project description.',
           lambda { |desc|
             config[:git] = true,
             config[:github] = true,
             config[:github_desc] = desc
           }
    )
    in_output_directory :initialize_git, :initialize_github
  }
end

def github_url
  user = Git.global_config['github.user']
  return unless user
  "http://github.com/#{user}/#{name}"
end

def initialize_git
  return unless @config[:git]
  File.rename('.bnsignore', '.gitignore') if test ?f, '.bnsignore'
  author = Git.global_config['user.name']
  email  = Git.global_config['user.email']
  if test ?f, 'Rakefile'
    lines = File.readlines 'Rakefile'
    lines.each do |line|
      case line
      when %r/^\s*authors\s+/
        line.replace "  authors  '#{author}'" unless author.nil? or line !~ %r/FIXME/
      when %r/^\s*email\s+/
        line.replace "  email  '#{email}'" unless email.nil? or line !~ %r/FIXME/
      when %r/^\s*url\s+/
        next unless @config[:github]
        url = github_url
        line.replace "  url  '#{url}'" unless url.nil? or line !~ %r/FIXME/
      when %r/^\s*\}\s*$/
        line.insert 0, "  ignore_file  '.gitignore'\n" if test ?f, '.gitignore'
      end
    end
    File.open('Rakefile', 'w') {|fd| fd.puts lines}
  end
  @git = Git.init
  @git.add
  @git.commit "Initial commit to #{name}."
end

def initialize_github
  return unless @config[:github]
  user = Git.global_config['github.user']
  token = Git.global_config['github.token']
  raise ::Bones::App::Error, 'A GitHub username was not found in the global configuration.' unless user
  raise ::Bones::App::Error, 'A GitHub token was not found in the global configuration.' unless token
  Net::HTTP.post_form(
      URI.parse('http://github.com/api/v2/yaml/repos/create'),
      'login' => user,
      'token' => token,
      'name' => name,
      'description' => @config[:github_desc]
  )
  @git.add_remote 'origin', "git@github.com:#{user}/#{name}.git"
  @git.config 'branch.master.remote', 'origin'
  @git.config 'branch.master.merge', 'refs/heads/master'
  @git.push 'origin'
end