修复 awesome 启动时 pulse 音量显示 bug

awesome/multicolor-theme.lua

@@ -202,8 +202,11 @@ local volicon = wibox.widget.imagebox(theme.widget_vol)
 -- PulseAudio volume
 theme.volume = lain.widget.pulse({
       settings = function()
+         vlevel = "N/A"
+         if volume_now then
             vlevel = volume_now.left .. "-" .. volume_now.right .. "%|" .. volume_now.device
-         if volume_now.muted then
+         end
+         if volume_now and volume_now.muted then
             vlevel = vlevel .. " M"
          end
          widget:set_markup(markup.fontfg(theme.font, "#7493d2", vlevel))

awesome/pulse.lua

@@ -86,9 +86,12 @@ local function factory(args)
    function pulse.update()
       helpers.async({ shell, "-c", type(pulse.cmd) == "string" and pulse.cmd or pulse.cmd() },
          function(s)
+            if not s or #s == 0 then
+               volume_now = nil
+            else
                volume_now = parse_sink(s)
-
                pulse.device = volume_now.index
+            end
 
             widget = pulse.widget
             settings()