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I'm trying to get my site to use only relative URLs, like in the question drupal.stackexchange.com/questions/105932

I'm trying to get my site to use only relative URLs, like in the question drupal.stackexchange.com/questions/105932

But I've changed the code for Drupal 8 to this by getting rid of the deprecated function:

I've made this work by modifying one line of core. I changed the last line of template_preprocess_file_link() in file.module from $variables['link'] = \Drupal::l($link_text, Url::fromUri($url, $options)); to $variables['link'] = $url;. This makes all URLs relative without any noticeable issues. Does anyone know how to achieve this without hacking core? Or, does anyone know what negative effects doing this might cause?

EDIT 3: It seems like Drupal 8.0.3 and beyond will do this by default:

https://www.drupal.org/node/2650374

EDIT 3: It seems like Drupal 8.0.3 and beyond will do this by default:

https://www.drupal.org/node/2650374

But I've changed the code for Drupal 8 to this by getting rid of the deprecated function:

I've made this work by modifying one line of core. I changed the last line of template_preprocess_file_link() in file.module from $variables['link'] = \Drupal::l($link_text, Url::fromUri($url, $options)); to $variables['link'] = $url;. This makes all URLs relative without any noticeable issues. Does anyone know how to achieve this without hacking core? Or, does anyone know what negative effects doing this might cause?

EDIT 3: It seems like Drupal 8.0.3 and beyond will do this by default:

https://www.drupal.org/node/2650374