Add xdg-uninstall option to setup

setup.py

@@ -641,6 +641,64 @@ def xdgInstall():
 
     return
 
+##
+#  XDG Uninstallation (xdg-uninstall)
+##
+
+def xdgUninstall():
+    """Will attempt to uninstall icons and make a launcher.
+    """
+    print("")
+    print("XDG Uninstall")
+    print("=============")
+    print("")
+
+    exCode = subprocess.call(
+        ["xdg-desktop-menu", "uninstall", "novelwriter.desktop"]
+    )
+    if exCode == 0:
+        print("Uninstalled menu desktop file")
+    else:
+        print(f"Error {exCode}: Could not uninstall menu desktop file")
+
+    sizeArr = ["16", "22", "24", "32", "48", "64", "96", "128", "256", "512"]
+
+    # App Icon
+    for aSize in sizeArr:
+        exCode = subprocess.call([
+            "xdg-icon-resource", "uninstall", "--noupdate",
+            "--context", "apps", "--size", aSize, "novelwriter"
+        ])
+        if exCode == 0:
+            print(f"Uninstalled app icon size {aSize}")
+        else:
+            print(f"Error {exCode}: Could not uninstall app icon size {aSize}")
+
+    # Mimetype
+    for aSize in sizeArr:
+        exCode = subprocess.call([
+            "xdg-icon-resource", "uninstall", "--noupdate",
+            "--context", "mimetypes", "--size", aSize,
+            "application-x-novelwriter-project"
+        ])
+        if exCode == 0:
+            print(f"Uninstalled mime icon size {aSize}")
+        else:
+            print(f"Error {exCode}: Could not uninstall mime icon size {aSize}")
+
+    # Update Cache
+    exCode = subprocess.call(["xdg-icon-resource", "forceupdate"])
+    if exCode == 0:
+        print("Updated icon cache")
+    else:
+        print(f"Error {exCode}: Could not update icon cache")
+
+    print("")
+    print("Done!")
+    print("")
+
+    return
+
 ##
 #  WIN Installation (win-install, launcher)
 ##
@@ -873,6 +931,7 @@ if __name__ == "__main__":
         "                 install.\n"
         "    xdg-install  Install launcher and icons for freedesktop systems. Run as root or \n"
         "                 with sudo for system-wide install, or as user for single user install.\n"
+        "                 Running 'xdg-uninstall' will remove the icons.\n"
         "    win-install  Install desktop and start menu icons for Windows systems.\n"
     )
 
@@ -932,6 +991,14 @@ if __name__ == "__main__":
         else:
             xdgInstall()
 
+    if "xdg-uninstall" in sys.argv:
+        sys.argv.remove("xdg-uninstall")
+        if hostOS == OS_WIN:
+            print("ERROR: Command 'xdg-uninstall' cannot be used on Windows")
+            sys.exit(1)
+        else:
+            xdgUninstall()
+
     if "win-install" in sys.argv:
         sys.argv.remove("win-install")
         if hostOS == OS_WIN: