SelectProfileForm::buildForm

public SelectProfileForm::buildForm(array $form, FormStateInterface $form_state, $install_state = NULL)

public function buildForm(array $form, FormStateInterface $form_state, $install_state = NULL) {
  $form['#title'] = $this->t('Select an installation profile');

  $profiles = array();
  $names = array();
  foreach ($install_state['profiles'] as $profile) {
    /** @var $profile \Drupal\Core\Extension\Extension */
    $details = install_profile_info($profile->getName());
    // Don't show hidden profiles. This is used by to hide the testing profile,
    // which only exists to speed up test runs.
    if ($details['hidden'] === TRUE && !drupal_valid_test_ua()) {
      continue;
    }
    $profiles[$profile->getName()] = $details;

    // Determine the name of the profile; default to file name if defined name
    // is unspecified.
    $name = isset($details['name']) ? $details['name'] : $profile->getName();
    $names[$profile->getName()] = $name;
  }

  // Display radio buttons alphabetically by human-readable name, but always
  // put the core profiles first (if they are present in the filesystem).
  natcasesort($names);
  if (isset($names['minimal'])) {
    // If the expert ("Minimal") core profile is present, put it in front of
    // any non-core profiles rather than including it with them alphabetically,
    // since the other profiles might be intended to group together in a
    // particular way.
    $names = array('minimal' => $names['minimal']) + $names;
  }
  if (isset($names['standard'])) {
    // If the default ("Standard") core profile is present, put it at the very
    // top of the list. This profile will have its radio button pre-selected,
    // so we want it to always appear at the top.
    $names = array('standard' => $names['standard']) + $names;
  }

  // The profile name and description are extracted for translation from the
  // .info file, so we can use $this->t() on them even though they are dynamic
  // data at this point.
  $form['profile'] = array(
    '#type' => 'radios',
    '#title' => $this->t('Select an installation profile'),
    '#title_display' => 'invisible',
    '#options' => array_map(array($this, 't'), $names),
    '#default_value' => 'standard',
  );
  foreach (array_keys($names) as $profile_name) {
    $form['profile'][$profile_name]['#description'] = isset($profiles[$profile_name]['description']) ? $this->t($profiles[$profile_name]['description']) : '';
  }
  $form['actions'] = array('#type' => 'actions');
  $form['actions']['submit'] = array(
    '#type' => 'submit',
    '#value' => $this->t('Save and continue'),
    '#button_type' => 'primary',
  );
  return $form;
}