Just a quick offering today on an informative post from Ankit Gadiya about unwanted nested frames in Emacs. The TL;DR is that Gadiya runs Ghostel as his Emacs shell in TUI and demon mode. That works well but he has a script that calls emacsclient to load a file. There’s nothing special about it; it’s just what you’d expect it to be but when he runs it from with Ghostel, it creates a nested frame in the Ghostel frame rather than replacing the Ghostel frame.
The solution is pretty simple. Gadiya changed his script to check if he was in Ghostel, and if so, calls emacsclient with a parameter to reuse the current frame. You can check Gadiya’s post for the details.
For me, the most interesting aspect was how he checked if he was in Ghostel. It turns out that Emacs sets the environment variable INSIDE_EMACS when it’s running a shell or subprocess. I didn’t know that so I learned something new from Gadiya’s post.