From addb61367c7e86f80ab9578f78779a2b50c9ba01 Mon Sep 17 00:00:00 2001
From: Knut Ahlers <knut@ahlers.me>
Date: Thu, 19 Apr 2018 11:06:31 +0200
Subject: [PATCH] Show battery in tmux status

Signed-off-by: Knut Ahlers <knut@ahlers.me>
---
 .tmux.conf       |  2 +-
 bin/tmux-battery | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100755 bin/tmux-battery

diff --git a/.tmux.conf b/.tmux.conf
index f554da1..c8ad47c 100644
--- a/.tmux.conf
+++ b/.tmux.conf
@@ -34,7 +34,7 @@ set -g status-justify left
 set -g status-left-length 40
 set -g status-right-length 140
 set -g status-left '#[fg=green]#H#[default] '
-set -g status-right '#[fg=red,bg=default]#(check_config)#[default] #[fg=red,bg=default]#(tmux-chrony-timediff)#[default] #[fg=white,bg=red]#(tmux-reboot-required)#[default] #[fg=red,dim,bg=default]#(uptime | cut -f 4-5 -d " " | cut -f 1 -d ",") #[fg=white,bg=default]%a, %H:%M:%S#[default] #[fg=blue,bright]%Y-%m-%d (KW %V) '
+set -g status-right '#[fg=red,bg=default]#(check_config)#[default] #[fg=red,bg=default]#(tmux-chrony-timediff)#[default] #[fg=white,bg=red]#(tmux-reboot-required)#[default] #[fg=white,bg=default]#(tmux-battery)#[default] #[fg=green,bg=default]#(uptime | cut -f 4-5 -d " " | cut -f 1 -d ",") #[fg=white,bg=default]%a, %H:%M:%S#[default] #[fg=blue,bright]%Y-%m-%d (KW %V) '
 
 # C-b is not acceptable -- Vim uses it
 set-option -g prefix C-a
diff --git a/bin/tmux-battery b/bin/tmux-battery
new file mode 100755
index 0000000..41d9c91
--- /dev/null
+++ b/bin/tmux-battery
@@ -0,0 +1,21 @@
+#!/bin/bash
+set -euo pipefail
+
+SYM_ADAPTER="⚡️"
+SYM_BATTERY="🔋"
+BATTERY=/sys/class/power_supply/BAT0
+AC=/sys/class/power_supply/AC
+
+[ -e ${BATTERY} ] || { echo "No battery" >&2; exit 0; }
+[ -e ${AC} ] || { echo "No ac" >&2; exit 0; }
+
+CAPACITY=$(cat ${BATTERY}/capacity)
+AC_CONNECT=$(cat ${AC}/online)
+
+if [ ${AC_CONNECT} -eq 0 ]; then
+  SYM=${SYM_BATTERY}
+else
+  SYM=${SYM_ADAPTER}
+fi
+
+echo "${SYM} ${CAPACITY}%"