Don't lose the CIDER session over TRAMP files

Fixes #3250

CHANGELOG.md

@@ -25,6 +25,7 @@
 - [#3402](https://github.com/clojure-emacs/cider/issues/3402): fix `cider-format-connection-params` edge case for Emacs 29.
 - [#3393](https://github.com/clojure-emacs/cider/issues/3393): Recompute namespace info on each shadow-cljs recompilation or evaluation.
 - Recompute namespace info on each fighweel-main recompilation.
+- [#3250](https://github.com/clojure-emacs/cider/issues/3250): don't lose the CIDER session over TRAMP files. 
 - Fix the `xref-find-definitions` CIDER backend to return correct filenames.
 - Fix the `cider-xref-fn-deps` buttons to direct to the right file.
 - Make TRAMP functionality work when using non-standard ports.

cider-connection.el

@@ -624,6 +624,8 @@ REPL defaults to the current REPL."
     (when (string-match-p "#uzip" file)
       (let ((avfs-path (directory-file-name (expand-file-name (or (getenv "AVFSBASE")  "~/.avfs/")))))
         (setq file (replace-regexp-in-string avfs-path "" file t t))))
+    (when-let ((tp (cider-tramp-prefix (current-buffer))))
+      (setq file (string-remove-prefix tp file)))
     (when (process-live-p proc)
       (let* ((classpath (or (process-get proc :cached-classpath)
                             (let ((cp (with-current-buffer repl

test/cider-common-tests.el

@@ -72,7 +72,7 @@
       (expect (cider-make-tramp-prefix "ssh" "cider-devs" "192.168.50.9#22")
               :to-equal "/ssh:[email protected]#22:")
       (expect (cider-make-tramp-prefix "ssh" "cider-devs" "192.168.50.9")
-              :to-equal "/ssh:[email protected]#22:")
+              :to-equal "/ssh:[email protected]:")
       (expect (cider-make-tramp-prefix "ssh" "cider-devs" "192.168.50.9" "12345")
               :to-equal "/ssh:[email protected]#12345:")
       (expect (cider-make-tramp-prefix "ssh" "cider-devs" "192.168.50.9#12345")