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tmux/.tmux/plugins/tmux-battery/scripts/helpers.sh

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+get_tmux_option() {
+	local option="$1"
+	local default_value="$2"
+	local option_value="$(tmux show-option -gqv "$option")"
+	if [ -z "$option_value" ]; then
+		echo "$default_value"
+	else
+		echo "$option_value"
+	fi
+}
+
+is_osx() {
+	[ $(uname) == "Darwin" ]
+}
+
+is_chrome() {
+	chrome="/sys/class/chromeos/cros_ec"
+	if [ -d "$chrome" ]; then
+		return 0
+	else
+		return 1
+	fi
+}
+
+is_wsl() {
+	version=$(</proc/version)
+	if [[ "$version" == *"Microsoft"* || "$version" == *"microsoft"* ]]; then
+		return 0
+	else
+		return 1
+	fi
+}
+
+command_exists() {
+	local command="$1"
+	type "$command" >/dev/null 2>&1
+}
+
+battery_status() {
+	if is_wsl; then
+		local battery
+		battery=$(find /sys/class/power_supply/*/status | tail -n1)
+		awk '{print tolower($0);}' "$battery"
+	elif command_exists "pmset"; then
+		pmset -g batt | awk -F '; *' 'NR==2 { print $2 }'
+	elif command_exists "acpi"; then
+		acpi -b | awk '{gsub(/,/, ""); print tolower($3); exit}'
+	elif command_exists "upower"; then
+		local battery
+		battery=$(upower -e | grep -E 'battery|DisplayDevice'| tail -n1)
+		upower -i $battery | awk '/state/ {print $2}'
+	elif command_exists "termux-battery-status"; then
+		termux-battery-status | jq -r '.status' | awk '{printf("%s%", tolower($1))}'
+	elif command_exists "apm"; then
+		local battery
+		battery=$(apm -a)
+		if [ $battery -eq 0 ]; then
+			echo "discharging"
+		elif [ $battery -eq 1 ]; then
+			echo "charging"
+		fi
+	fi
+}