Alert the user and don't try to run if no internet connection

roles/task-shortcuts/files/uug-ansible-wrapper.py

@@ -11,6 +11,7 @@
 import gi
 import os
 import platform
+import socket
 import subprocess
 import sys
 gi.require_version('Gtk', '3.0')
@@ -35,6 +36,7 @@
 def main():
     # Set the url, release, and user config ahead of showing the window so
     # they can be displayed in labels
+
     parse_user_config()
     global url
     url = get_remote_url()
@@ -152,8 +154,18 @@ def on_run_clicked(self, button):
         """Begins the process of running the command in the VTE and disables
            the run and cancel buttons so that they cannot be used while the
            command is running"""
+        if not is_online():
+            no_internet_msg = "It appears that you are not able to access" \
+                              " the Internet. This tools requires that you" \
+                              " be online please check your settings and try" \
+                              " again"
+            show_dialog(self, Gtk.MessageType.ERROR, Gtk.ButtonsType.CANCEL,
+                        "No Internet connection", no_internet_msg)
+            return
+
         if not validate_branch(release, url):
             invalid_branch(self, release, url)
+            return
 
         gksudo_msg = "<b>Enter your password to configure your VM</b>" \
                      "\nTo configure your virtual machine, administrator" \
@@ -279,7 +291,7 @@ def invalid_branch(parent, release, url):
                      " release listed above" % (release, url, url)
     show_dialog(parent, Gtk.MessageType.ERROR, Gtk.ButtonsType.CANCEL,
                 "Invalid Release", bad_branch_msg)
-    Gtk.main_quit()
+    return
 
 
 def unable_to_detect_branch():
@@ -298,5 +310,19 @@ def unable_to_detect_branch():
         release = "master"
 
 
+def is_online():
+    # Since the user will probably be pulling a significant amount of data
+    # from this host, it should be a decent host to use to check connectivity
+    test_hostname = "packages.linuxmint.com"
+    try:
+        host = socket.gethostbyname(test_hostname)
+        s = socket.create_connection((host, 80), 2)
+        s.close()
+        return True
+    except: # noqa
+        pass
+    return False
+
+
 if __name__ == "__main__":
     main()