51 lines
1.2 KiB
Lua
Executable file
51 lines
1.2 KiB
Lua
Executable file
--- Provides:
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--- signal::brightness
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--- percentage (integer)
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local awful = require("awful")
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--- Subscribe to backlight changes
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--- Requires inotify-tools
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local brightness_subscribe_script = [[
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bash -c "
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while (inotifywait -e modify /sys/class/backlight/?**/brightness -qq) do echo; done
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"]]
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local brightness_script = [[
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sh -c "
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brightnessctl g
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"]]
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local brightness_max = [[
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sh -c "
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brightnessctl m
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"]]
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local emit_brightness_info = function()
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awful.spawn.with_line_callback(brightness_script, {
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stdout = function(value)
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awful.spawn.with_line_callback(brightness_max, {
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stdout = function(max)
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local percentage = tonumber(value) / tonumber(max) * 100
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awesome.emit_signal("signal::brightness", math.floor(percentage + 0.5))
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end,
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})
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end,
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})
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end
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--- Run once to initialize widgets
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emit_brightness_info()
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--- Kill old inotifywait process
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awful.spawn.easy_async_with_shell(
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"ps x | grep \"inotifywait -e modify /sys/class/backlight\" | grep -v grep | awk '{print $1}' | xargs kill",
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function()
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-- Update brightness status with each line printed
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awful.spawn.with_line_callback(brightness_subscribe_script, {
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stdout = function(_)
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emit_brightness_info()
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end,
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})
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end
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)
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