Hi, all. I'm having some issues with using docker container and have an idea for improving it.
Firstly, I'm familiar with https://www.gnu.org/software/emacs//manual/html_node/tramp/Remote-programs.html and `tramp-own-remote-path`, but they aren't sufficient for seamlessly dropping into a docker container and using binaries inside of it. Here's an example with emacs 30 using `emacs -Q`. First the code: ``` (require 'tramp) (message "") (message "using the docker haskell image") (message (concat "path should be: ""/root/.cabal/bin:/root/.local/bin:/opt/ghc/9.4.2/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin")) (message "show that using tramp-own-remote-path isn't sufficient") (let ((docker-container-id (string-trim (shell-command-to-string "docker run -it --rm --detach haskell")))) (let ((default-directory (concat "/docker:" docker-container-id ":")) (tramp-remote-path '(tramp-own-remote-path))) (message docker-container-id) (message (concat "path is: " (truncate-string-to-width (eshell-command-result "echo $PATH") 100))))) ``` Here are it's results: ``` using the docker haskell image path should be: /root/.cabal/bin:/root/.local/bin:/opt/ghc/9.4.2/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin show that using tramp-own-remote-path isn’t sufficient 69ae6adb42d95fd9ebef5738218217d822ee2977956b61227b43eb8ccb1401d4 Tramp: Opening connection nil for 69ae6adb42d95fd9ebef5738218217d822ee2977956b61227b43eb8ccb1401d4 using docker...done path is: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin ``` This means that when you: - open eshell - navigate to - `/docker:69ae6adb42d95fd9ebef5738218217d822ee2977956b61227b43eb8ccb1401d4:` - run `ghc` You'll be met with an error that `ghc` doesn't exist in the Haskell docker container. It seems that the typical way for docker containers to specify PATH uses `ENV PATH` so it seems good to support it (if that's not already implemented). I noticed when using docker inspect on the container that it contains the PATH set by the docker file. Perhaps tramp could simply use that for the docker container method? Thanks.
