Add system-info Linux systemd user unit

Update the `system-info` directory with the addition of a `systemd`
service file and an new Linux script to display current CPU temperature
and core/thread utilization. Update `.conduit.yaml` with addition
`apt` dependencies `sysstat` and `jq`. Update the install and remove
scripts to setup and tear down the `systemd` user unit. Lastly, decrease
the `tmux` status line update interval from 5 to 2 seconds.

.conduit.yaml

@@ -1,15 +1,34 @@
 ---
 - location: ~/.config/tmux
 - apt:
-    - libevent-dev
+    - tmux
-    - ncurses-dev
+    - xclip
-    - xsel
+    - urlview
-- repo:
+    - sysstat
-    - url: 'https://github.com/tmux/tmux.git'
+    - jq
-      location: ~/.local/src/tmux
+- brew:
-      branch: 2.6
+    - tmux
-      actions:
+    - urlview
-          - command: ./configure --prefix=$HOME/.local
+    - reattach-to-user-namespace
-          - command: {install: make -j8 install, remove: make uninstall}
+- pacman:
+    - tmux
+    - xclip
+    - urlscan
+- dnf:
+    - tmux
+    - xclip
+    - urlscan
 - symlink:
-    - {src: tmux.conf, dst: ~/.tmux.conf}
+    - src: tmux.conf
+      dst: ~/.tmux.conf
+    - src: layouts/session-main
+      dst: ~/.local/share/tmux/layouts/session-main
+    - src: layouts/window-tall
+      dst: ~/.local/share/tmux/layouts/window-tall
+    - src: layouts/window-wide-left
+      dst: ~/.local/share/tmux/layouts/window-wide-left
+    - src: layouts/window-wide-right
+      dst: ~/.local/share/tmux/layouts/window-wide-right
+- command:
+    - install: system-info/install.sh
+    - remove: system-info/remove.sh

layouts/session-main

@@ -0,0 +1,4 @@
+rename-session main
+rename-window home
+
+# vim: filetype=tmux

layouts/window-tall

@@ -1,4 +1,3 @@
 # vim: ft=tmux
-select-pane -t 0
 split-window -v -p 34
 select-pane -t 1

layouts/window-wide-left

@@ -0,0 +1,3 @@
+# vim: ft=tmux
+split-window -h -p 43
+select-pane -t 1

layouts/window-wide-right

@@ -0,0 +1,3 @@
+# vim: ft=tmux
+split-window -h -p 57
+select-pane -t 1

system-info/install.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+script_dir=`dirname $0`
+
+if [ `uname` = Darwin ]; then
+  cp $script_dir/system-info.plist ~/Library/LaunchAgents/system-info.plist
+  launchctl load -w ~/Library/LaunchAgents/system-info.plist
+else
+  cp $script_dir/system-info.service ~/.config/systemd/user/system-info.service
+  systemctl --user enable system-info
+  systemctl --user start system-info
+fi

system-info/remove.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+if [ `uname` = Darwin ]; then
+  launchctl unload ~/Library/LaunchAgents/system-info.plist
+  rm ~/Library/LaunchAgents/system-info.plist
+else
+  systemctl --user stop system-info
+  systemctl --user disable system-info
+fi

system-info/system-info-Linux.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+cache_dir=~/.cache/tmux
+cache_file=$cache_dir/system-info
+
+# Make sure the output directory exists.
+if [ ! -d $cache_dir ]; then
+  mkdir -p $cache_dir
+fi
+
+# Cleanup cache file when interrupted.
+trap '[ -f $cache_file ] && rm $cache_file;' INT
+
+while true; do
+  # Parse the current CPU load on all cores/threads.
+  cpu_load=`mpstat -P ALL -n 1 -u 1 -o JSON | \
+    jq '.sysstat.hosts[0].statistics[0]["cpu-load"][1:]|.[].idle' | \
+    awk '$idle ~ /[-.0-9]*/ { printf "%s", substr("█▇▆▅▄▃▂▁ ", int($idle / 11), 1) }'`
+  # Parse the current CPU package temperature.
+  cpu_temp=`sensors coretemp-isa-0000 | head -3 | tail -1 | \
+    awk '{ print substr($4, 2) }'`
+  # Write to the cache file.
+  echo "$cpu_temp $cpu_load" > $cache_file
+done

system-info/system-info-macOS.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+cache_dir=~/.cache/tmux
+cache_file=$cache_dir/system-info
+
+# Make sure the output directory exists.
+if [ ! -d $cache_dir ]; then
+  mkdir -p $cache_dir
+fi
+
+# Cleanup cache file when interrupted.
+trap '[ -f $cache_file ] && rm $cache_file; exit' INT
+trap '[ -f $cache_file ] && rm $cache_file; exit' TERM
+
+while true; do
+  battery="`pmset -g batt | grep --color=never -Eo '\d+%'` ↯"
+  echo "$battery" > $cache_file
+  sleep 2
+done

system-info/system-info.plist

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>Label</key>
+    <string>system-info</string>
+    <key>ProgramArguments</key>
+    <array>
+      <string>/Users/benie/.config/tmux/system-info/system-info-macOS.sh</string>
+    </array>
+    <key>KeepAlive</key>
+    <true/>
+  </dict>
+</plist>

system-info/system-info.service

@@ -0,0 +1,8 @@
+[Unit]
+Description=System Info
+
+[Service]
+ExecStart=/home/benie/.config/tmux/system-info/system-info-Linux.sh
+
+[Install]
+WantedBy=default.target

tmux.conf

@@ -1,3 +1,6 @@
+# Set the tmux version to check for command support
+run 'tmux setenv -g TMUX_VERSION $(tmux -V | cut -c 6-8)'
+
 # Use vim keybindings in copy mode
 set -g mode-keys vi
 
@@ -10,13 +13,13 @@ bind Space send-prefix
 set -s escape-time 0
 
 # Increase scrollback buffer size
-set -g history-limit 50000
+set -g history-limit 1000000
 
 # Set tmux messages display time to 4 seconds
 set -g display-time 4000
 
 # Refresh 'status-left' and 'status-right' more often
-set -g status-interval 5
+set -g status-interval 2
 
 # Upgrade $TERM
 set -g default-terminal "tmux-256color"
@@ -34,78 +37,109 @@ set -g pane-base-index 1
 # Enable mouse support
 set-option -g mouse on
 
-# Enable changing cursor shape per pane in iTerm2 or VTE compatible terminals,
+# Enable changing cursor shape per pane, vim or zsh should emit escape
-# vim or zsh should emit VTE compatible escape sequences to change cursor shape
+# sequences to change cursor shape.
-if -b '[ -n $ITERM_PROFILE ]' \
+# iTerm2 only requires this before tmux 2.9
-  "set -ga terminal-overrides '*:Ss=\E]1337;CursorShape=%p1%d\7'" \
+if '[ -n $ITERM_PROFILE ] && [[ "$TMUX_VERSION" < "2.9" ]]' \
-  "set -ga terminal-overrides '*:Ss=\E[%p1%d q:Se=\E[2 q'"
+  'set -ga terminal-overrides "*:Ss=\E]1337;CursorShape=%p1%d\7"'
+# VTE compatible terminals.
+if '[ ! -n $ITERM_PROFILE ]' \
+  'set -ga terminal-overrides "*:Ss=\E[%p1%d q:Se=\E[2 q"'
 
 # Enable strikethrough on VTE compatible terminals.
 set -ga terminal-overrides 'xterm*:smxx=\E[9m'
 
-# Set only on OS X where it's required
+# Set only on macOS where it's required
 if -b '[ "`uname`" = "Darwin" ]' \
-  "set -g default-command 'reattach-to-user-namespace -l $SHELL'"
+  'set -g default-command "reattach-to-user-namespace -l $SHELL"'
 
 # Restore old next/previous window bindings
 bind C-n next-window
 bind C-p previous-window
 
 # Make new splits open in current directory
-bind "\"" split-window -c "#{pane_current_path}"
+bind '"' split-window -c '#{pane_current_path}'
-bind "%" split-window -h -c "#{pane_current_path}"
+bind '%' split-window -h -c '#{pane_current_path}'
+
+# Change word separators to better match Vim.
+set -g word-separators "<>(){}[]/'\";@*+,.-_=!£$%^&:#~?`¬|\\ "
 
 # Integrate pane selection with vim
-is_vim='echo "#{pane_current_command}" | grep -iqE "(^|\/)g?(view|n?vim?)(diff)?$"'
+in_vim='tmux show-window-options | grep -q "@vim#{pane_id}"'
-bind -n C-h if-shell "$is_vim" "send-keys C-h" "select-pane -L"
+bind -n C-h if $in_vim 'send-keys C-h' 'select-pane -L'
-bind -n C-j if-shell "$is_vim" "send-keys C-j" "select-pane -D"
+bind -n C-j if $in_vim 'send-keys C-j' 'select-pane -D'
-bind -n C-k if-shell "$is_vim" "send-keys C-k" "select-pane -U"
+bind -n C-k if $in_vim 'send-keys C-k' 'select-pane -U'
-bind -n C-l if-shell "$is_vim" "send-keys C-l" "select-pane -R"
+bind -n C-l if $in_vim 'send-keys C-l' 'select-pane -R'
-bind -n C-\ if-shell "$is_vim" "send-keys C-\\" "select-pane -l"
 
-# Integrate urlview
+# Integrate urlscan or fallback to urlview
-bind-key u capture-pane \; split-window "tmux show-buffer | urlview -"
+if -b 'which urlscan' \
+  'bind u capture-pane \; split-window "tmux show-buffer | urlscan"' \
+  'bind u capture-pane \; split-window "tmux show-buffer | urlview -"'
 
+# Unbind copy mode defaults so pane selection works
+unbind -T copy-mode-vi C-h
+unbind -T copy-mode-vi C-j
 # Enter copy mode with C-U
-bind-key C-u copy-mode -u
+bind C-u copy-mode -u
 # Begin selection in copy mode with v not Space
-bind-key -T copy-mode-vi v send-keys -X begin-selection
+bind -T copy-mode-vi v send-keys -X begin-selection
+
+# Enable mouse scrolling up in alternate buffers.
+# If #{mouse_any_flag} is 1 the pane is running with mouse support, e.g. vim.
+# If #{alternate_on} is 1 the terminal is in alternate buffer mode, e.g. less.
+# If #{pane_in_mode} is 1 the pane is in copy-mode.
+bind -n WheelUpPane \
+  if -Ft= "#{mouse_any_flag}" \
+    "send-keys -M" \
+    "if -Ft= \"#{alternate_on}\" \
+      \"send-keys -t= Up ; \
+        send-keys -t= Up ; \
+        send-keys -t= Up ; \" \
+      \"select-pane -t= ; \
+        if -Ft= '#{pane_in_mode}' \
+          'send-keys -M' \
+          'copy-mode -e ; send-keys -M' \" "
+# Emulate mouse scrolling down in alternate buffers.
+bind -n WheelDownPane \
+  if -Ft= "#{mouse_any_flag}" \
+    "send-keys -M" \
+    "if -Ft= \"#{alternate_on}\" \
+      \"send-keys -t= Down ; \
+        send-keys -t= Down ; \
+        send-keys -t= Down ; \" \
+      \"select-pane -t= ; \
+        send-keys -M\" "
+
 # Yank to the system clipboard in copy mode
-if -b '[ "`uname`" = "Linux" ]' \
+if -b '[ "`uname`" = "Darwin" ]' \
-  "bind-key -T copy-mode-vi y send-keys -X copy-pipe-and-cancel 'xsel -i -p && xsel -o -p | xsel -i -b'"
+  'bind -T copy-mode-vi y send-keys -X copy-pipe-and-cancel \
+    "reattach-to-user-namespace pbcopy"' \
+  'bind -T copy-mode-vi y send -X copy-pipe-and-cancel \
+    "xclip -i -sel p -f | xclip -i -sel c"'
 
 # Left status style
-set-window-option -g status-left " #S"
+setw -g status-left " #{session_name}"
-set-window-option -g status-left-fg colour240
+setw -g status-left-style fg=colour240,bg=colour233
-set-window-option -g status-left-bg colour233
 
 # Centre status style
-set-window-option -g status-fg colour240
+setw -g status-style fg=colour240,bg=colour233
-set-window-option -g status-bg colour233
 
-# Right status style
+# Right status style shows system info, date, and time.
-set-window-option -g status-right "%a %d-%m-%y %H:%M "
+setw -g status-right "#(cat ~/.cache/tmux/system-info) %a %d-%m-%y %H:%M "
-set-window-option -g status-right-fg white
+setw -g status-right-style fg=white,bg=colour233
-set-window-option -g status-right-bg colour233
 
 # Active window status style
-set-window-option -g window-status-current-format " #I: #W"
+setw -g window-status-current-format " #{window_index}: #{window_name}"
-set-window-option -g window-status-current-fg white
+setw -g window-status-current-style fg=white,bg=colour233
-set-window-option -g window-status-current-bg colour233
 
 # Inactive window status style
-set-window-option -g window-status-format " #I: #W"
+setw -g window-status-format " #{window_index}: #{window_name}"
-set-window-option -g window-status-fg colour240
+setw -g window-status-style fg=colour240,bg=colour233
-set-window-option -g window-status-bg colour233
 
-# Active pane border
+# Pane border style
-set-option -g pane-active-border-fg colour235
+set -g pane-border-style fg=colour233,bg=colour233
-set-option -g pane-active-border-bg colour235
+set -g pane-active-border-style fg=colour235,bg=colour235
-
-# Inactive pane border
-set-option -g pane-border-fg colour233
-set-option -g pane-border-bg colour233
 
 # Command line window list selection
-set-window-option -g mode-style fg=colour233,bg=colour30
+set-window-option -g mode-style fg=white,bg=colour237
-set-option -g message-style fg=colour233,bg=colour30
+set-option -g message-style fg=white,bg=colour237

visor.zsh

@@ -0,0 +1,6 @@
+if ! tmux list-sessions -F '#{session_name}' | grep 'visor' > /dev/null; then
+  tmux new-session -d -s visor
+  tmux rename-window -t visor:0 home
+fi
+tmux attach-session -t visor
+exit