Manage and navigate Tmux panes from Emacs and vise versa.

There is several packages out there to address Emacs client <-> Tmux navigation issue. However, this one rebinds Emacs and Tmux vanilla (default) shortcuts, preserving a canonical workflow.

Minimal version: Tmux 3.3-rc.

Features

• [C-x o] - switches to a Tmux panel if it's visible, otherwise executes Emacs' other-window. The pane circling feature works intuitively on both Emacs and other Tmux panes (keeping Emacs other-window navigation order).
• [C-x 1] - closes other Tmux panes if they're visible, otherwise executes Emacs' delete-other-windows.
• [C-x 0] - closes current Tmux panes (no-op on the last pane) or executes Emacs' delete-window.
• [tmux-prefix-key c] - creates a new Tmux window preserving Emacs buffer's path (defined by 'ttymux-pane-directory-method custom variable).
• [tmux-prefix-key %] - splits Tmux pane vertically preserving Emacs buffer's path (defined by 'ttymux-pane-directory-method custom variable).
• [tmux-prefix-key "] - splits Tmux pane horizontally preserving Emacs buffer's path (defined by 'ttymux-pane-directory-method custom variable).

Default tmux.conf

unbind C-\\
set -g prefix C-\\
bind C-\\ send-prefix

is_emacs="ps -o state= -o comm= -t '#{pane_tty}' | grep -iqE emacs"
is_other_panes='echo "#{window_panes}" | grep -vqwE "1"'
bind-key -T prefix % if "$is_emacs" "send-prefix ; send-keys %" "split-window -h -c \"#{pane_current_path}\""
bind-key -T prefix \" if "$is_emacs" 'send-prefix ; send-keys \"' "split-window -v -c \"#{pane_current_path}\""
bind-key -T prefix c if "$is_emacs" "send-prefix ; send-keys c" "new-window -c \"#{pane_current_path}\""
bind -Temacs-keys o if "$is_emacs" "send C-x; send" "select-pane -t :.+"
bind -Temacs-keys Any { send C-x; send }
bind -Temacs-keys 1 { kill-pane -a; send C-x; send }
bind -Temacs-keys 0 if "$is_emacs" "send C-x; send" 'if $is_other_panes kill-pane'
bind -Troot C-x switch-client -Temacs-keys

Known issues

new-window and split-window are executed on a different Tmux session

If Emacs client is using and multiple Tmux sessions are running on the same machine, split-window and new-window commands always open a pane on a particular Tmux session. To avoid this run Emacs server outside a Tmux session.

Licence

MIT