Try to handle OSError when we use the --export argument in CLI mode.

Fixes #08835

gramps/cli/argparser.py

@@ -35,6 +35,7 @@ Module responsible for handling the command line arguments for Gramps.
 #
 #-------------------------------------------------------------------------
 import sys
+import os
 import getopt
 import logging
 
@@ -290,6 +291,21 @@ class ArgParser:
                 if (opt_ix < len(options) - 1
                         and options[opt_ix + 1][0] in ('-f', '--format')):
                     family_tree_format = options[opt_ix + 1][1]
+                abs_name = os.path.abspath(os.path.expanduser(value))
+                if not os.path.exists(abs_name):
+                    # The file doesn't exists, try to create it.
+                    try:
+                        open(abs_name, 'w').close()
+                        unlink(abs_name)
+                    except OSError as e:
+                        message = _("WARNING: %(strerr)s "
+                                    "(errno=%(errno)s):\n"
+                                    "WARNING: %(name)s\n") % {
+                                      'strerr' : e.strerror,
+                                      'errno'  : e.errno,
+                                      'name'   : e.filename}
+                        print(message)
+                        sys.exit(1)
                 self.exports.append((value, family_tree_format))
             elif option in ['-a', '--action']:
                 action = value