Treemacs not updating with docker Tramp mode in Emacs 29

[cphoward]

I'm not getting any errors, I cannot find a definitive answer if treemacs supports /docker:container-id:/path. Does treemacs support the new build-in /docker:... TRAMP mode?

[Alexander-Miller]

I don't know. Internally treemacs just calls primitives like directory-files. If those can deal with docker then in theory treemacs should be able to do that as well.

I remember an issue in the past where treemacs would incorrectly transform a tramp path, maybe something similar is happening here as well. Call treemacs-edit-workspaces and check whether the path you see in the listing has been changed from what you've originally given.

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[nettoyoussef]

I would like to just point out for anyone that is researching this problem that creating tunnels using different methods, such as ssh and docker, will create this issue.

So, if, e.g., you have a path that is like /ssh:user@machine|docker:root@container, that gets transformed in /docker:root@container afterwards (and of course, treemacs cannot find the path, since it is not in the local machine).

One solution, as @Alexander-Miller point out, is to edit manually the paths using treemacs-edit-workspaces. I don't know if there is a better way, though.

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