I’m trying to create a new, so far private theme and it seems to work more or less.
But it doesn’t show up in the Admin GUI.
I copied all the files (.gitignore, blueprints.yaml (no homepage, demo, bugs links yet), CHANGELOG.md, languages.yaml, LICENSE, photographer.php (renamed), photographer.yaml (renamed), README.md, screenshot.jpg, thumbnail.jpg) from the root of the Photographer theme to my theme and adapted the contents and the images. I entered my theme in /user/config/system.yaml under theme. Still, no sign of it in the Admin GUI. But I noticed sometimes a mixup with Photographer. So I temporarely, as I thought, switched over to Photographer, but then couldn’t go back via the Admin GUI.
So I deleted the Photographer and Quark themes from the installation, corrected the /user/config/system.yaml and my site works again with my theme. In the Admin GUI under Themes I now only get “The connection to the GPM cannot be established”.
What is my theme missing that it won’t show up there?
In case you ask: No, it is not meant to be published and it is anyway by far not ripe for that.
I think I should be able to work with strictly local themes in the GUI, but how?