Does not work with Drupal 8.0.0-rc1 release.

Thanks for this. I really appreciate the work you've put in.

I did get a "The website encountered an unexpected error. Please try again later." message unfortunately when I put as the Read More page. And paths require the "/" too or this error occurs as well.

Also I was planning on incorporating the changes in the 7.x-dev branch which moves the configuration to a new page. I'm assuming that the Variables for multilingual support are handled in Drupal 8 Core.

Yes I tried <front> and "node/1" rather than "/node/1" (I was testing to break!)

I reckon something like

$link = ($link[0] == '/') ? $link : '/' . $link;

in the validator should help.

Great stuff! Thank you.

However, I had a few issues on my brief testing.

I entered /node/1 for the URL and got an error saying

Manually entered paths should start with /, ? or #.

I changed one line to only look at the first character of the raw link for the in_array check as follows -

if (parse_url($link, PHP_URL_SCHEME) === 'internal' && !in_array($raw_link[0], ['/', '?', '#'], TRUE) && substr($raw_link, 0, 7) !== '<front>') {

This passed the first test but then I got an invalid internal path error.

I then made another change to check the raw link which worked.

    if (substr($raw_link, 0, 7) !== '<front>' && !\Drupal::service('path.validator')->isValid(\Drupal::service('path.alias_manager')->getPathByAlias($raw_link, $language))) {
      $form_state->setErrorByName('site_status_message_link', t('You must enter a valid internal path.'));
    }

One final change is I put the error message symbols in <em> tags so that the comma isn't seen as an allowed symbol too!

$form_state->setErrorByName('site_status_message_link', t('Manually entered paths should start with %slash, %question or %hash.', ['%slash' => '/', '%question' => '?', '%hash' => '#']));

I've not made a patch of this, however, but can. Unless you want to check yourself?

Then I'll roll out a release hopefully this weekend. The next step would be to get the form on a separate page as per the 7.x-dev branch, but there's no rush for that.

Oh, I've just noticed that the error says you must enter a valid internal path. However, you can add external URLs...!

I have had to make a few changes and included translation.

One thing I noticed was the config wasn't being picked up on install and also it was causing an issue when I uninstalled so I fixed that too

I've attached a patch based off yours. If you could apply this and test (as well as anyone else!) and let me know how you get on.

Thanks

Changes are in DEV branch now. Please test and report back and I will get a stable release out.

Closing this issue. The latest 8.x version of this module appears to work with D8.

Tests still to write (copies of the 7 version tests) before a stable release is created, however.