tripal_jbrowse/tripal_jbrowse.module

<?php
/**
 * @file
 * Core functions of this module.
 */

/**
 * Implements hook_theme().
 */
function tripal_jbrowse_theme($existing, $type, $theme, $path) {

  $items = array(
    'node__jbrowse_instance' => array(
      // Don't specify the path in the template name.
      // Unless you have your template inside a directory within this module.
      'template' =>  'theme/node--jbrowse-instance',
      'variables' => array('node' => (object)array()),
    ),
  );

  return $items;
}

/**
 * Implements node preprocess hook.
 */
function tripal_jbrowse_preprocess_node(&$vars) {

  if ($vars['node']->type == 'jbrowse_instance') {
    $path = $vars['node']->field_jburl['und'][0]['url'];

    $files = array(
      'combination_tracks.css',
      'faceted_track_selector.css',
      'icons.css',
      'maker.css',
      'sequence.css',
      'tristate.css',
      'export_dialog.css',
      'file_dialog.css',
      'hierarchical_track_selector.css',
      'main.css',
      'menubar.css',
      'track_styles.css'
    );
    foreach ($files as $filename) {
      $sheets = drupal_add_css($path . '/' . $filename, array('group' => CSS_THEME, 'type' => 'external'));
    }
  }
}