Make sure not to catch keyboard interrupts and system exits

service/prereqsCheck.py

@@ -17,6 +17,8 @@ class PreCheckMessage:
             app = wx.App(False)
             wx.MessageBox(msg, 'Error', wx.ICON_ERROR | wx.STAY_ON_TOP)
             app.MainLoop()
+        except (KeyboardInterrupt, SystemExit):
+            raise
         except:
             pass
         finally:
@@ -45,6 +47,8 @@ def version_precheck():
 
         import wx
         version_block += "\nwxPython version: {} ({})".format(VERSION_STRING, wx.wxWidgets_version)
+    except (KeyboardInterrupt, SystemExit):
+        raise
     except:
         msg = "pyfa requires wxPython v4.0.0b2+. You can download wxPython from https://wxpython.org/pages/downloads/"
         raise PreCheckException(msg)
@@ -56,6 +60,8 @@ def version_precheck():
 
         if (int(saMatch.group(1)), int(saMatch.group(2)), int(saMatch.group(3))) < (1, 0, 5):
             raise Exception()
+    except (KeyboardInterrupt, SystemExit):
+        raise
     except:
         msg = "pyfa requires SQLAlchemy v1.0.5+. You can download SQLAlchemy from https://www.sqlalchemy.org/download.html"
         raise PreCheckException(msg)
@@ -67,12 +73,16 @@ def version_precheck():
 
         if int(logVersion[0]) < 1:
             raise Exception()
+    except (KeyboardInterrupt, SystemExit):
+        raise
     except:
         raise PreCheckException("pyfa requires Logbook version 1.0.0+. You can download Logbook from https://pypi.python.org/pypi/Logbook")
 
     try:
         import requests
         version_block += "\nRequests version: {}".format(requests.__version__)
+    except (KeyboardInterrupt, SystemExit):
+        raise
     except:
         msg = "pyfa requires the requests module. You can download requests from https://pypi.python.org/pypi/requests"
         raise PreCheckException(msg)
@@ -80,6 +90,8 @@ def version_precheck():
     try:
         import dateutil
         version_block += "\nDateutil version: {}".format(dateutil.__version__)
+    except (KeyboardInterrupt, SystemExit):
+        raise
     except:
         msg = "pyfa requires the python-dateutil module. You can download python-dateutil form https://pypi.python.org/pypi/python-dateutil"
         raise PreCheckException(msg)