[awesome] add vpn widget

home/.config/awesome/rc.lua

@@ -206,6 +206,8 @@ awful.screen.connect_for_each_screen(function(s)
             widgets.tearstop,
             widgets.redshift,
             widgets.bluetooth,
+            widgets.vpn.icon,
+            widgets.vpn.widget,
             widgets.netdown_icon,
             widgets.netdown.widget,
             widgets.netup_icon,

home/.config/awesome/widgets.lua

@@ -66,6 +66,30 @@ widgets.bat = lain.widget.bat({
     end
 })
 
+widgets.vpn = {}
+widgets.vpn.icon = wibox.widget.imagebox(iconsdir .. "vpn.png")
+widgets.vpn.widget = wibox.widget.textbox()
+widgets.vpn.update = function()
+    helpers.async({ "/bin/ip", "link" }, function(output)
+        connected = false
+        for line in output:gmatch("[^\r\n]+") do
+            vpn_server = string.match(line, "^%d+: mullvad%-(%a%a%d+):")
+            if vpn_server then
+                widgets.vpn.widget:set_markup(markup.fontfg(theme.font, theme.colors.blue, vpn_server .. " "))
+                connected = true
+            end
+        end
+
+        if connected then
+            widgets.vpn.icon.visible = true
+        else
+            widgets.vpn.widget:set_markup(markup.fontfg(theme.font, theme.colors.blue, ""))
+            widgets.vpn.icon.visible = false
+        end
+    end)
+end
+helpers.newtimer("vpn", 5, widgets.vpn.update)
+
 widgets.bluetooth = wibox.widget.imagebox(iconsdir .. "bluetooth-on.png")
 widgets.bluetooth.pass_state = function(callback)
     helpers.async_with_shell("/sbin/rfkill -n -o SOFT list bluetooth|uniq", function(state)