Autojoin channels with same name on different servers in erc

* lisp/erc/erc-join.el (erc-autojoin-channels): Join channels with
the same name on different servers (bug#32723).

Copyright-paperwork-exempt: yes

1 files changed, 4 insertions, 0 deletions

diff --git a/lisp/erc/erc-join.el b/lisp/erc/erc-join.el
index 896521eaf0a..c292fdbd797 100644
--- a/lisp/erc/erc-join.el
+++ b/lisp/erc/erc-join.el
@@ -161,6 +161,10 @@ This function is run from `erc-nickserv-identified-hook'."
               ;; Only auto-join the channels that we aren't already in
               ;; using a different nick.
               (when (or (not buffer)
+                        ;; If the same channel is joined on another
+                        ;; server the best-effort is to just join
+                        (not (string-match (car l)
+                                           (process-name erc-server-process)))
                         (not (with-current-buffer buffer
                                (erc-server-process-alive))))
                 (erc-server-join-channel server chan))))))))