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20c7a8b4c1
On some laptops, `acpi_listen` sometimes prints charger updates even if there was no change. This commit ensures that no unneeded updates will be sent with the `evil::charger` signal.
62 lines
2 KiB
Lua
62 lines
2 KiB
Lua
-- Provides:
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-- evil::battery
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-- percentage (integer)
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-- evil::charger
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-- plugged (boolean)
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local awful = require("awful")
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local update_interval = 10
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-- Subscribe to power supply status changes with acpi_listen
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local charger_script = [[
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sh -c '
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acpi_listen | grep --line-buffered ac_adapter
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'
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]]
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-- First get battery file path
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-- If there are multiple, only get the first one
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-- TODO support multiple batteries
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awful.spawn.easy_async_with_shell("sh -c 'out=\"$(find /sys/class/power_supply/BAT?/capacity)\" && (echo \"$out\" | head -1) || false' ", function (battery_file, _, __, exit_code)
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-- No battery file found
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if not (exit_code == 0) then
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return
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end
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-- Periodically get battery info
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awful.widget.watch("cat "..battery_file, update_interval, function(_, stdout)
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awesome.emit_signal("evil::battery", tonumber(stdout))
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end)
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end)
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local status_old = -1
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-- First get charger file path
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awful.spawn.easy_async_with_shell("sh -c 'out=\"$(find /sys/class/power_supply/*/online)\" && (echo \"$out\" | head -1) || false' ", function (charger_file, _, __, exit_code)
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-- No charger file found
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if not (exit_code == 0) then
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return
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end
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-- Then initialize function that emits charger info
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local emit_charger_info = function()
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awful.spawn.easy_async_with_shell("cat "..charger_file, function (out)
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local status = tonumber(out) == 1
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if not (status == status_old) then
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awesome.emit_signal("evil::charger", status)
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status_old = status
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end
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end)
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end
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-- Run once to initialize widgets
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emit_charger_info()
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-- Kill old acpi_listen process
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awful.spawn.easy_async_with_shell("ps x | grep \"acpi_listen\" | grep -v grep | awk '{print $1}' | xargs kill", function ()
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-- Update charger status with each line printed
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awful.spawn.with_line_callback(charger_script, {
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stdout = function(_)
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emit_charger_info()
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end
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})
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end)
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end)
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