class drush::setup {

  #private()
  if $caller_module_name != $module_name {
    warning("${name} is not part of the public API of the ${module_name} \
module and should not be directly included in the manifest.")
  }

  # Install extra packages.
  validate_bool($drush::ensure_extra_packages)
  if $drush::ensure_extra_packages {
    validate_array($drush::extra_packages)
    package { $drush::extra_packages:
      ensure => installed,
    }
  }

  concat{ 'drush-sh-profile':
    ensure => present,
    path   => '/etc/profile.d/drush.sh',
  }
  concat::fragment { 'drush-sh-profile-header':
    ensure  => present,
    target  => 'drush-sh-profile',
    content => "# MANAGED BY PUPPET\n\n",
    order   => 0,
  }
  if $drush::php_path {
    validate_absolute_path($drush::php_path)
    concat::fragment { 'drush-sh-profile-php-path':
      ensure  => present,
      target  => 'drush-sh-profile',
      content => "export DRUSH_PHP=${drush::php_path}\n",
      order   => 1,
    }
  }
  if $drush::php_ini_path {
    validate_absolute_path($drush::php_ini_path)
    concat::fragment { 'drush-sh-profile-php-ini-path':
      ensure  => present,
      target  => 'drush-sh-profile',
      content => "export PHP_INI=${drush::php_ini_path}\n",
      order   => 1,
    }
  }
  if $drush::drush_ini_path {
    validate_absolute_path($drush::drush_ini_path)
    concat::fragment { 'drush-sh-profile-drush-ini-path':
      ensure  => present,
      target  => 'drush-sh-profile',
      content => "export DRUSH_INI=${drush::drush_ini_path}\n",
      order   => 1,
    }
  }

  # Base install path of any drush installations.
  file { $drush::install_base_path:
    ensure => directory,
  }

  # Drush directories.
  file { ['/etc/drush', '/usr/share/drush', '/usr/share/drush/commands']:
    ensure => directory,
  }

  # Symlink to drush default version executable.
  file { $drush::drush_exe_default:
    ensure => link,
    target => "/usr/local/bin/drush${drush::default_version_major}",
  }

  # Install drush versions. It could be improved with future parser's each(),
  # or building a hash like
  # {'6' => {'version' => '6'}, 'master' => {'version' => 'master'}}
  validate_array($drush::versions)
  $versions = parseyaml(template('drush/install-versions-hash.erb'))
  $defaults = {
    install_type => $drush::install_type,
    autoupdate   => $drush::autoupdate,
    method       => 'composer'
  }
  create_resources('drush::install', $versions, $defaults)

  # Make /opt/drush/default a symlink to the codebase
  # of the default drush installation.
  # TODO: this is coupled to composer install method.
  $default_path = "${drush::install_base_path}/${drush::default_version_major}"
  file { "${drush::install_base_path}/default":
    ensure => link,
    target => "${default_path}/vendor/drush/drush",
  }

}