Merge pull request #12262 from meeseeksmachine/auto-backport-of-pr-12261-on-7.x

Backport PR  #12261 on branch 7.x (Do not exit if self.interact is True)

IPython/core/shellapp.py

@@ -418,7 +418,8 b' class InteractiveShellApp(Configurable):'
                 fname = os.path.join(fname, "__main__.py")
             if not os.path.exists(fname):
                 self.log.warning("File '%s' doesn't exist", fname)
-                self.exit(2)
+                if not self.interact:
+                    self.exit(2)
             try:
                 self._exec_file(fname, shell_futures=True)
             except: