namespace :load do
  task :defaults do
    set :composer_roles, :all
    set :composer_download_url, "https://getcomposer.org/installer"
    set :composer_install_flags, "--no-dev --prefer-dist --no-interaction --optimize-autoloader"
  end
end

namespace :composer do
  desc "检查 Composer 是否已安装"
  task :check do
    on release_roles(fetch(:composer_roles)) do
      next if test("[ -f #{deploy_path}/.dep/composer.phar ]")

      composer_version = fetch(:composer_version, nil)
      composer_version_flag = composer_version ? "-- --version=#{composer_version}" : ""

      execute :mkdir, "-p", "#{deploy_path}/.dep"
      execute :curl, "-sS", fetch(:composer_download_url), "|", :php, composer_version_flag
      execute :mv, "composer.phar #{deploy_path}/.dep/composer.phar"
    end
  end

  desc "执行 Composer 命令"
  task :run, :command do |t, args|
    args.with_defaults(:command => :list)

    on release_roles(fetch(:composer_roles)) do
      within release_path do
        execute :php, "#{deploy_path}/.dep/composer.phar", args[:command], *args.extras
      end
    end
  end

  desc "安装应用依赖"
  task :install do
    invoke "composer:run", :install, fetch(:composer_install_flags)
  end

  after "deploy:started",  "composer:check"
end