[No theme css/js in .info since core's css/js aggregation sometimes breaks themes] #d7

settings.php

<?php

// Theme serves either minified css/js or uncompressed css/js.
$conf['theme_minified_css'] = TRUE;
$conf['theme_minified_js'] = TRUE;

if (defined('PANTHEON_ENVIRONMENT')) {

  switch (PANTHEON_ENVIRONMENT) {
    case 'dev':
      $conf['theme_minified_css'] = FALSE;
      $conf['theme_minified_js'] = FALSE;
      break;
    case 'test':
      $conf['theme_minified_css'] = TRUE;
      $conf['theme_minified_js'] = TRUE;
      break;
    case 'live':
      $conf['theme_minified_css'] = TRUE;
      $conf['theme_minified_js'] = TRUE;
      break;
  }

}

template.php

<?php

function THEME_preprocess_html(&$vars) {
  // We don't include our css/js in the theme's .info since we minimize it ourselves w/ Grunt.
  $min_css = variable_get('theme_minified_css');
  $min_js = variable_get('theme_minified_js');

  $css_options = array(
    'group' => CSS_THEME,
    'every_page' => TRUE,
    'weight' => 9999,
    'preprocess' => FALSE,
  );
  $js_options = array(
    'group' => JS_THEME,
    'every_page' => TRUE,
    'weight' => 9999,
    'preprocess' => FALSE,
  );

  if ($min_css) {
    drupal_add_css(path_to_theme() . '/css/all.min.css', $css_options);
  }
  else {
    drupal_add_css(path_to_theme() . '/css/maintenance.css', $css_options);
    drupal_add_css(path_to_theme() . '/css/style.css', $css_options);
  }

  if ($min_js) {
    drupal_add_js(path_to_theme() . '/js/all.min.js', $js_options);
  }
  else {
    drupal_add_js(path_to_theme() . '/js/vendor.js', $js_options);
    drupal_add_js(path_to_theme() . '/js/script.js', $js_options);
  }
}