Drupal 8

I got this error message, that argument two passed to my module's implementation of hook_help() "must be an instance of RouteMatchInterface, instance of Drupal\Core\Routing\CurrentRouteMatch given", and it's a misleading one.

CurrentRouteMatch in fact (unsurprisingly) implements the RouteMatchInterface. The problem was i hadn't actually defined CurrentRouteMatch— i needed to have a use statement at the top of my module (or use the full PSR4 path in the parameter definition of the hook implementation, but i went with the former). Like so:

In page.html.twig you will have a working {{ base_path }} variable. Why it isn't available in every template, i have no idea. As i think it should be and everything else looks messy, my preferred solution is to do exactly as Drupal does in the preprocess page function for any place i need it.

The Form block module, mentioned in the Drupal.org forum post how to embed node add form in a block?, is still going strong in Drupal 8.

https://www.drupal.org/project/formblock

For the moment, we're following the crowd and using the Default content module. It is nice and has built-in integration with installation profiles, but the export could be more convenient (multiple items of content at once, please!) and import could be made much more robust (given half a chance, we'll reimplement it on migrate).

Short answer: Restart apache or disable the APC classloader in your local.settings.php (see settings.php).

While working on the Give module, which follows the same pattern for donation forms as Drupal 8 core's Contact module uses for contact forms, an access control handler was not being found even though i quadruple checked that my handler annotation described the handler correctly for the name and location of its file.

The ConfigEntityType annotation for the access handler, with most other annotations removed:

I was getting errors like this in the console:

downloadable font: incorrect file size in WOFF header (font-family: "Graphik" style:normal weight:bold stretch:normal src index:1) source: ... themes/butaro/fonts/Graphik-Bold-Web.woff
downloadable font: rejected by sanitizer (font-family: "Graphik" style:normal weight:bold stretch:normal src index:1) source: ... themes/butaro/fonts/Graphik-Bold-Web.woff

Git would have given you warnings that look like this when you git added the fonts:

UPDATE: There is a contributed Drupal 8 module to set allowed formats that was spun off of the core issue to allow text field to enforce a specific text format.

Right now, there's no good way to do it, but there's good hope that this issue will be fixed in Drupal 8 core. OK but right now? Better Formats isn't stable for Drupal 8 yet. So hacky custom form alters is the best i've come up with.

There's a module for that now: https://www.drupal.org/project/textarea_widget_for_text

It's nice and simple with an alter hook (as detailed on the module page) and in this answer.