I’ve been working for the past few days on constructing a Shortcut to use for quickly sending a link and block of text to whatever blogging software I’m using on whichever device I’m on at the moment. As of today, I’ve hit a point where it does everything I wanted it to when I started playing, so I’m designating this an official “version one” release (for posterity’s sake, I suppose I can refer to the prior two versions as the alpha and beta releases).
The Shortcut is now cross-platform, with many thanks to Jason Snell for giving me exactly the final pieces I needed.
Selecting some text on a webpage and then using the Share Sheet on iOS or the Services menu on macOS will grab the webpage link and the selected text, convert it to Markdown format, convert any relative URLs in the selected text to absolute URLs, and then place the final text into a new Ulysses sheet on iOS or MarsEdit post on macOS, all ready for any final edits before publishing to your blog.
If this shortcut might be of use to you, either as-is or with some modifications for your particular needs, download, tweak if necessary, use, and (hopefully) enjoy!