dot_tmux.conf

# Set the command prefix
set -g prefix C-a
unbind C-b
unbind C-c

# Remove time delay to avoid tripping vi
set -s escape-time 1

# synchronize-panes shortcut
bind y set-window-option synchronize-panes

# Ensure 0-based index for window numbers
set -g base-index 0

# Ensure 0-based index for pane numbers
set -g pane-base-index 0

# Make it a little easier for new tmux users
set -g mouse on

# Reloads the config file
bind r source-file ~/.tmux.conf \; display "Config reloaded!"

# Send prefix to an application by pressing the prefix twice
bind C-a send-prefix

# Window splitting
bind | split-window -h -c "#{pane_current_path}"
bind - split-window -v -c "#{pane_current_path}"
#
# BEGIN Adapted from https://stackoverflow.com/a/40902312
#
run-shell 'tmux setenv -g TMUX_VERSION $(tmux -V | sed -E "s/^tmux +([\.0-9]+).*/\1/g")'
# NOTE: tmux doesn't use SemVer. It just increments by 0.1 with every release.
if-shell -b '[ "$(echo "$TMUX_VERSION <  2.9" | bc)" = 1 ]' ' \
    bind-key \ split-window -h -c "#{pane_current_path}"'

if-shell -b '[ "$(echo "$TMUX_VERSION >= 2.9" | bc)" = 1 ]' ' \
    bind \\ split-window -h -c "#{pane_current_path}"'
#
# END
#

# Smart pane switching with awareness of Vim splits and fzf.
# See: https://github.com/junegunn/fzf/pull/582#issuecomment-377731826
# Tip:
#     Get the tty and index of all the panes in the current window by running
#     the following command in the shell:
#
#         tmux list-panes -F '#{pane_tty} #{pane_index}'
#
#     Then run the following command to get the stach of commnands running in
#     the pane you are insterested in:
#
#         ps -o state= -o comm= -t '<TYPE_YOUR_PANE_TTY_HERE>'
#
one_of_apps="ps -o state= -o comm= -t '#{pane_tty}' | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?(g?(view|n?vim?x?)(diff)?|fzf|meteor)$'"
bind -n C-h if-shell "$one_of_apps" "send-keys C-h"  "if -F '#{pane_at_left}' '' 'select-pane -L'"
bind -n C-j if-shell "$one_of_apps" "send-keys C-j"  "if -F '#{pane_at_bottom}' '' 'select-pane -D'"
bind -n C-k if-shell "$one_of_apps" "send-keys C-k"  "if -F '#{pane_at_top}' '' 'select-pane -U'"
bind -n C-l if-shell "$one_of_apps" "send-keys C-l"  "if -F '#{pane_at_right}' '' 'select-pane -R'"
bind -n 'C-\' if-shell "$one_of_apps" "send-keys 'C-\\'" "select-pane -l"

# Old-style pane movement. For when you want to move between panes immediately
# and not have to pass through one or more Vim splits.
bind h select-pane -L
# Sometimes, I press h too soon before I've let go of Ctrl (Which is part of
# the prefix combo). During those instance, this ensures my intent is still
# understood by tmux.
bind C-h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R
# Sometimes, I press l too soon before I've let go of Ctrl (Which is part of
# the prefix combo). During those instance, this ensures my intent is still
# understood by tmux.
bind C-l select-pane -R

# Smart pane resizing with awareness of Neovim splits.
# In iTerm2 you'll need to go to Preferences > Profile > Keys > Key Mappings
# and map Command-{h,j,k,l} as Escape sequence {h,j,k,l} respectively
bind -n M-h if -F "#{@pane-is-vim}" 'send-keys M-h' 'resize-pane -L 3'
bind -n M-j if -F "#{@pane-is-vim}" 'send-keys M-j' 'resize-pane -D 3'
bind -n M-k if -F "#{@pane-is-vim}" 'send-keys M-k' 'resize-pane -U 3'
bind -n M-l if -F "#{@pane-is-vim}" 'send-keys M-l' 'resize-pane -R 3'

# Old-style pane resizing. For when you want to resize a pane immediately and
# not have to pass through one or more Vim splits.
bind -r H resize-pane -L 5
bind -r J resize-pane -D 5
bind -r K resize-pane -U 5
bind -r L resize-pane -R 5

# # Display things in 256 colors
set -g default-terminal "screen-256color"

# Set status bar color scheme
set -g status-bg colour235
set -g status-fg white

set -g window-status-style fg=colour248,bg=colour235
set -g window-status-current-style bg=colour253,fg=colour232,bright

# Set pane colors
set -g pane-border-style fg=colour236
set -g pane-active-border-style fg=colour142

# Set the status bar information
set -g status-left-length 40
set -g status-left "#[fg=colour248]S:#S  W:#I  P:#P#{?pane_synchronized, #[fg=colour255]#[bg=red](synced)#[default],}"
set -g status-right "#[fg=colour248]%b %d %R"

# set utf-8 support in the status bar
if-shell "[[ `tmux -v | cut -d' ' -f2` -le 2.0  ]]" \
    "set -g status-utf8 on"

# Set status bar refresh interval
set -g status-interval 60

# Set window list alignment
set -g status-justify centre

# Set window notifications
setw -g monitor-activity on
setw -g visual-activity on

# Enable vi mode
setw -g mode-keys vi

# Make copy/paste same as vim
# unbind [
bind Escape copy-mode
unbind p
bind p paste-buffer
unbind-key -T copy-mode-vi v
bind-key -T copy-mode-vi 'v' send-keys -X begin-selection
bind-key -T copy-mode-vi 'C-v' send -X rectangle-toggle
bind-key -T copy-mode-vi 'y' send-keys -X copy-selection-and-cancel

# Integrate with OS X pasteboard
# Use vim keybindings in copy mode
setw -g mode-keys vi

# Disable auto-rename of windows
set-option -g allow-rename off

# Increase scrollback history
set-option -g history-limit 10000

# Experimental: popup session selector
# From https://waylonwalker.com/tmux-fzf-session-jump/
bind C-u display-popup -E "tmux list-sessions | sed -E 's/:.*$//' | grep -v \"^$(tmux display-message -p '#S')\$\" | fzf --reverse | xargs tmux switch-client -t"

# Tmux plugins managed by Tmux Plugin Manager
# See: https://github.com/tmux-plugins/tpm
set -g @plugin 'tmux-plugins/tpm'

# Fuzzy find text to copy (uses fzf)
# See: https://github.com/laktak/extrakto
set -g @plugin 'laktak/extrakto#efca89800293cbb8224463d82eeecffdb2f7036a'

# Automatically renumber windows when one closes.
# Can be overriden by a session.
set-option -g renumber-windows on

# This MUST ALWAYS be at the bottom of the file
run '~/.tmux/plugins/tpm/tpm'