Remove upower dependency from evil battery daemon

README.md

@@ -61,7 +61,7 @@ Here are the instructions you should follow to replicate my AwesomeWM setup.
    - **Ubuntu** 18.04 or newer (and all Ubuntu-based distributions)
 
        ```shell
-       sudo apt install rofi lm-sensors upower acpid jq fortune-mod redshift mpd mpc maim feh pulseaudio inotify-tools
+       sudo apt install rofi lm-sensors acpid jq fortune-mod redshift mpd mpc maim feh pulseaudio inotify-tools
 
        # install light, which is not in the official ubuntu repositories
        wget https://github.com/haikarainen/light/releases/download/v1.2/light_1.2_amd64.deb
@@ -73,7 +73,7 @@ Here are the instructions you should follow to replicate my AwesomeWM setup.
        *Assuming your AUR helper is* `yay`
 
        ```shell
-       yay -S rofi lm_sensors upower acpid jq fortune-mod redshift mpd mpc maim feh light-git pulseaudio inotify-tools
+       yay -S rofi lm_sensors acpid jq fortune-mod redshift mpd mpc maim feh light-git pulseaudio inotify-tools
        ```
 3. Install needed fonts
 

config/awesome/evil/battery.lua

@@ -8,12 +8,6 @@ local awful = require("awful")
 
 local update_interval = 30
 
-local battery_script = [[
-    sh -c "
-    upower -i $(upower -e | grep BAT) | grep percentage | awk '{print $2}'
-    "
-]]
-
 -- Subscribe to power supply status changes with acpi_listen
 local charger_script = [[
     sh -c '
@@ -21,29 +15,36 @@ local charger_script = [[
     '
 ]]
 
--- Periodically get battery info
-awful.widget.watch(battery_script, update_interval, function(widget, stdout)
-    local battery = stdout:gsub("%%", "")
-    awesome.emit_signal("evil::battery", tonumber(battery))
-end)
-
-local emit_charger_info = function()
-    awful.spawn.easy_async_with_shell("cat /sys/class/power_supply/*/online", function (out)
-        local status = tonumber(out) == 1
-        awesome.emit_signal("evil::charger", status)
+-- First get battery file path
+-- If there are multiple, only get the first one
+-- TODO support multiple batteries
+awful.spawn.easy_async_with_shell("find /sys/class/power_supply/BAT?/capacity | head -1", function (battery_file)
+    -- Periodically get battery info
+    awful.widget.watch("cat "..battery_file, update_interval, function(_, stdout)
+        awesome.emit_signal("evil::battery", tonumber(stdout))
     end)
-end
-
--- Run once to initialize widgets
-emit_charger_info()
-
--- Kill old acpi_listen process
-awful.spawn.easy_async_with_shell("ps x | grep \"acpi_listen\" | grep -v grep | awk '{print $1}' | xargs kill", function ()
-    -- Update charger status with each line printed
-    awful.spawn.with_line_callback(charger_script, {
-        stdout = function(_)
-            emit_charger_info()
-        end
-    })
 end)
 
+-- First get charger file path
+awful.spawn.easy_async_with_shell("find /sys/class/power_supply/*/online | head -1", function (charger_file)
+    -- Then initialize function that emits charger info
+    local emit_charger_info = function()
+        awful.spawn.easy_async_with_shell("cat "..charger_file, function (out)
+            local status = tonumber(out) == 1
+            awesome.emit_signal("evil::charger", status)
+        end)
+    end
+
+    -- Run once to initialize widgets
+    emit_charger_info()
+
+    -- Kill old acpi_listen process
+    awful.spawn.easy_async_with_shell("ps x | grep \"acpi_listen\" | grep -v grep | awk '{print $1}' | xargs kill", function ()
+        -- Update charger status with each line printed
+        awful.spawn.with_line_callback(charger_script, {
+            stdout = function(_)
+                emit_charger_info()
+            end
+        })
+    end)
+end)

config/awesome/notifications/battery.lua

@@ -5,6 +5,7 @@ local notifications = require("notifications")
 
 -- Helper variables
 local charger_first_time = true
+local battery_first_time = true
 local charger_plugged = true
 local battery_full_already_notified = true
 local battery_low_already_notified = false
@@ -18,6 +19,10 @@ awesome.connect_signal("evil::battery", function(battery)
     local icon
     local timeout
     battery_current = battery
+    if battery_first_time then
+        battery_first_time = false
+        return
+    end
     if not charger_plugged then
         icon = icons.battery
         if battery <= user.battery_threshold_critical and not battery_critical_already_notified then