added arch pkgbuild and desktop file

linux/PKGBUILD

+# Maintainer: Thomas Buck <thomas@xythobuz.de>
+pkgname=CaseLights
+pkgver=0.1
+pkgrel=1
+pkgdesc="RGB LED and UV strip controls"
+arch=('any')
+license=('unknown')
+depends=('python-pyqt5'
+         'python-pyserial')
+source=("caselights"
+        "caselights_icon.png"
+        "de.xythobuz.caselights.desktop")
+md5sums=(SKIP
+         SKIP
+         SKIP)
+
+package() {
+	mkdir -p "$pkgdir/usr/bin"
+	cp caselights "$pkgdir/usr/bin/caselights"
+	mkdir -p "$pkgdir/usr/share/pixmaps"
+	cp caselights_icon.png "$pkgdir/usr/share/pixmaps/caselights_icon.png"
+	mkdir -p "$pkgdir/usr/share/applications"
+	cp de.xythobuz.caselights.desktop "$pkgdir/usr/share/applications/de.xythobuz.caselights.desktop"
+}

linux/README.md

+# CaseLights Linux Qt client
+
+Simple Python Qt Linux client for CaseLights. Install on Arch Linux like this:
+
+    makepkg
+    sudo pacman -U CaseLights-0.1.1-any.pkg.tar.xz
+
+Or on all other linux distros:
+
+	sudo cp caselights /usr/bin/caselights
+	sudo cp caselights_icon.png /usr/share/pixmaps/caselights_icon.png
+	sudo cp de.xythobuz.caselights.desktop /usr/share/applications/de.xythobuz.caselights.desktop
+
+Then run it from your desktop environment menu or even add it to the autostart there.
+

linux/caselights.py → linux/caselights

+#!/usr/bin/env python3
+
 # CaseLights Linux Qt System Tray client
 # depends on:
 # - python-pyqt5
 # - python-pyserial
 
-import sys
+import sys
+import os.path
 import serial, serial.tools, serial.tools.list_ports
 from PyQt5 import QtWidgets, QtGui, QtCore
 from PyQt5.QtWidgets import QSystemTrayIcon, QAction, QMenu
 from PyQt5.QtGui import QIcon, QPixmap
 from PyQt5.QtCore import QCoreApplication, QSettings
 
-class CaseLights():
+class CaseLights():
     name = "CaseLights"
     vendor = "xythobuz"
     version = "0.1"
 
+    iconPath = "/usr/share/pixmaps/"
+    iconName = "caselights_icon.png"
+
     staticColors = [
         [ "Off",     "0",   "0",   "0", None ],
         [ "Red",   "255",   "0",   "0", None ],
 
     usedPort = None
     serial = None
-
     menu = None
     portMenu = None
     portActions = None
         if self.usedPort is not None:
             self.connect()
 
-        pic = QPixmap(32, 32)
-        pic.load("icon.png")
-        icon = QIcon(pic)
-
         self.menu = QMenu()
 
         colorMenu = QMenu("&Colors")
         self.quitAction.triggered.connect(self.exit)
         self.menu.addAction(self.quitAction)
 
+        iconPathName = ""
+        if os.path.isfile(self.iconName):
+            iconPathName = self.iconName
+        elif os.path.isfile(self.iconPath + self.iconName):
+            iconPathName = self.iconPath + self.iconName
+        else:
+            print("no icon found")
+
+        icon = QIcon()
+        if iconPathName is not "":
+            pic = QPixmap(32, 32)
+            pic.load(iconPathName)
+            icon = QIcon(pic)
+
         trayIcon = QSystemTrayIcon(icon)
         trayIcon.setToolTip(self.name + " " + self.version)
         trayIcon.setContextMenu(self.menu)
         trayIcon.setVisible(True)
-        
+
         sys.exit(app.exec_())
 
     def exit(self):

linux/de.xythobuz.caselights.desktop

+[Desktop Entry]
+Type=Application
+Version=1.0
+Name=CaseLights
+Comment=RGB LED and UV strip controls
+Path=/usr/bin
+Exec=caselights
+Icon=/usr/share/pixmaps/caselights_icon.png
+Terminal=false
+Categories=Utility;