Among other restrictions, Racket won't be able to read from directories named starting with a dot -- for example: ~/.emacs.d/elpa.
AND...
When you install Racket Mode as a normal Emacs package from MELPA, its files go under ~/.emacs.d/elpa.
Therefore when Racket Mode starts its "back end", written in Racket, it does racket ~/.emacs.d/elpa/racket-mode-xxx/main.rkt. Ergo the permission error.
Ways to avoid this problem
To avoid the problem, avoid either of the above conditions:
(Facts: Distro packages of Racket tend to be very old versions. Although the snap package is newer, unfortunately it comes with strict confinement.
Opinions: Sometimes it's best to get things direct, and, with freedom to use a programming language to write/use any program you wish... even a program that reads from certain directories. :smile:)
OR...
Install Racket Mode so its files are not under a dot directory. Any of the following can work:
Clone the files from here on GitHub, and add that directly to load-path in your Emacs init file.
OR...
Move your entire elpa subdirectory from under ~/.emacs.d to somewhere else, like ~/emacs-packages, and add (setq package-user-dir "~/emacs-packages") early in your Emacs init file, before any other package-xxx expressions.
When you use Racket as installed from https://snapcraft.io/racket, it runs using
strictconfinement.Among other restrictions, Racket won't be able to read from directories named starting with a dot -- for example:
~/.emacs.d/elpa.AND...
When you install Racket Mode as a normal Emacs package from MELPA, its files go under
~/.emacs.d/elpa.Therefore when Racket Mode starts its "back end", written in Racket, it does
racket ~/.emacs.d/elpa/racket-mode-xxx/main.rkt. Ergo the permission error.Ways to avoid this problem
To avoid the problem, avoid either of the above conditions:
Install Racket directly from https://download.racket-lang.org/. Racket's Linux installer is easy to use and flexible.
(Facts: Distro packages of Racket tend to be very old versions. Although the snap package is newer, unfortunately it comes with
strictconfinement.Opinions: Sometimes it's best to get things direct, and, with freedom to use a programming language to write/use any program you wish... even a program that reads from certain directories. :smile:)
OR...
Install Racket Mode so its files are not under a dot directory. Any of the following can work:
load-pathin your Emacs init file.OR...
elpasubdirectory from under~/.emacs.dto somewhere else, like~/emacs-packages, and add(setq package-user-dir "~/emacs-packages")early in your Emacs init file, before any otherpackage-xxxexpressions.