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Replacing the Druplicon favicon in a custom theme for Drupal 8

Placing the favicon.ico in the root of the theme folder, presuming you are using a custom theme, is by far the easiest way to tell Drupal to use that favicon.ico file in the rel shortcut icon (favicon) tag— and so displayed by modern browsers in the tab bar.

How to install Riot desktop (Matrix client) on Debian-based systems

Tested on Debian Mint edition, but this should work for Ubuntu too.

These instructions assume you are willing and able to use the command line— that is, open a terminal and type these lines of commands. Unlike the the official desktop install information, these instructions don't assume you already know and remember how to add a new remote source to your package manager and install from it.

The saga of Drupal link-link

Are your builds failing because of this?

Easily add content with update hooks: use default content module exports to create content that needs to be in sync with configuration

An approach for keeping content that is added as part of development synchronized with test and production environments is to use the Default Content module to export the content. It's built for the content to be exported to an installation profile's 'content' folder, and then the module, if enabled, automatically brings the content in when the site is installed.

Argument 2 passed to hook help() must be an instance of RouteMatchInterface

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:

How to get the base path for your Drupal 8 site in a Twig template

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.

Embedding a content add form in a block in Drupal 8

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

Drupal 8 default content the Agaric way

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).

Is Git corrupting your font files?

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:

Saving message entities programmatically

Our use case, re-saving existing messages, is a bit more complex than it should be, but not bad. This code will work for new or existing messages.

Where $exports is an array of long text strings that is each the JSON dump received form exporting a message type through the UI:

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