dotfiles/tmux
Jonny Barnes f8d525b7eb
Add a quick named-session binding and fix theme reload in tmux
prefix S now prompts for a name and runs new-session directly, replacing
the `<prefix> :` then `new -s name` command-mode round trip.

Session numbering in choose-tree (prefix s) turned out to be
session_id, an internal per-server counter with no base-index
equivalent, so it can't be made to start at 1 the way windows do;
named sessions plus C-s search in the tree are the workaround.

Also fixed a bug found while testing: `<prefix> r` re-sources the
whole config, and the trailing `source-file ~/.tmux-dark.conf` at the
end always ran, clobbering a light-themed session on every manual
reload. It now checks the invoking client's theme like the
client-attached hook already does.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013t7aQbc4EyYtab1crvSFTd
2026-08-14 09:36:27 +01:00

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Text

# add C-a as primary prefix, keep C-b as secondary
set-option -g prefix C-a
set-option -g prefix2 C-b
bind-key C-a send-prefix
# start with window 1 (instead of 0)
set -g base-index 1
# also start with 1 for window panes
setw -g pane-base-index 1
# renumber windows sequentially after closing any of them
set -g renumber-windows on
# don't detach when closing a window if other windows remain
set -g detach-on-destroy off
# prompt for a name and create a session in one step, instead of
# `<prefix> :` then `new -s name`
bind-key S command-prompt -p "New session name:" "new-session -s '%%'"
# reload config file (change file location to your the tmux.conf you want to use)
unbind r
bind r source-file ~/.tmux.conf
# Enable mouse mode (tmux 2.1 and above)
set -g mouse on
# Track focus events
set-option -g focus-events on
# don't rename windows automatically
set-option -g allow-rename off
# Set terminal
set -g default-terminal "$TERM"
# Allow OSC 8 links
set -ga terminal-features "*:hyperlinks"
# Set status bar length
set -g status-left-length 40
set -g status-right-length 60
# Center the window list
set -g status-justify centre
# Status bar colours live in ~/.tmux-light.conf and ~/.tmux-dark.conf. tmux
# learns the terminal's theme over OSC 2031, so this reacts to the appearance
# change itself, whether that came from Auto at sunrise/sunset or a manual
# toggle, since nothing here knows why it changed.
set-hook -g client-light-theme 'source-file ~/.tmux-light.conf'
set-hook -g client-dark-theme 'source-file ~/.tmux-dark.conf'
# Those hooks only fire on a change, so also pick the right palette whenever a
# client attaches. Sourcing is idempotent, so the overlap is harmless.
set-hook -g client-attached 'if -F "#{==:#{client_theme},light}" "source-file ~/.tmux-light.conf" "source-file ~/.tmux-dark.conf"'
# Default before any client has attached and reported a theme. This also
# runs on manual reload (`r` below), so check the invoking client's theme
# rather than always falling back to dark and clobbering a light session.
if -F "#{==:#{client_theme},light}" "source-file ~/.tmux-light.conf" "source-file ~/.tmux-dark.conf"