Due to a technical limitation of Emacs <=28, launching Emacs out of a
non-standard location is non-trivial, and `doom run` tries to promise
that it can do so on demand. Emacs 29 does introduce a --init-directory
switch that would make this easy, but it'll be some time before we can
rely on it.
So 'doom run' creates a fake $HOME in /tmp/doom.run/ and writes a
bootloader there to load your Doom config remotely. But there's a
problem: in this fake $HOME, none of the user's config, cache, data, or
binscript directories are available, so I symlink them there. This
should at least resolve the most trivial incompatibilities (like the
lack of all-the-icons fonts, which typically get installed to
$HOME/.local/share/fonts/ -- see #6807), but there may be yet more edge
cases. Still, this is a good enough compromise for now.
Fix: #6807
231fc9cf53