class Bundler::Plugin::Installer

def check_sources_consistency!(options)
  if options.key?(:git) && options.key?(:local_git)
    raise InvalidOption, "Remote and local plugin git sources can't be both specified"
  end
end

def install(names, options)
  check_sources_consistency!(options)
  version = options[:version] || [">= 0"]
  if options[:git]
    install_git(names, version, options)
  elsif options[:local_git]
    install_local_git(names, version, options)
  else
    sources = options[:source] || Gem.sources
    install_rubygems(names, version, sources)
  end
end

def install_all_sources(names, version, git_source_options, rubygems_source)
  source_list = SourceList.new
  source_list.add_git_source(git_source_options) if git_source_options
  Array(rubygems_source).each {|remote| source_list.add_global_rubygems_remote(remote) } if rubygems_source
  deps = names.map {|name| Dependency.new name, version }
  Bundler.configure_gem_home_and_path(Plugin.root)
  definition = Definition.new(nil, deps, source_list, true)
  install_definition(definition)
end

def install_definition(definition)
  def definition.lock(*); end
  definition.resolve_remotely!
  specs = definition.specs
  install_from_specs specs
end

def install_from_specs(specs)
  paths = {}
  specs.each do |spec|
    spec.source.install spec
    paths[spec.name] = spec
  end
  paths
end

def install_git(names, version, options)
  uri = options.delete(:git)
  options["uri"] = uri
  install_all_sources(names, version, options, options[:source])
end

def install_local_git(names, version, options)
  uri = options.delete(:local_git)
  options["uri"] = uri
  install_all_sources(names, version, options, options[:source])
end

def install_rubygems(names, version, sources)
  install_all_sources(names, version, nil, sources)
end