webkitpy: Unify the exit status codes.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/lint_test_expectations.py

 # Copyright (C) 2012 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 14 matching lines @@
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 import json
 import logging
 import optparse
 import signal
 import traceback
 
+from webkitpy.common import exit_codes
 from webkitpy.common.host import Host
 from webkitpy.layout_tests.models import test_expectations
 from webkitpy.layout_tests.port.factory import platform_options
 
 
-# This mirrors what the shell normally does.
-INTERRUPTED_EXIT_STATUS = signal.SIGINT + 128
-
-# This is a randomly chosen exit code that can be tested against to
-# indicate that an unexpected exception occurred.
-EXCEPTIONAL_EXIT_STATUS = 254
-
 _log = logging.getLogger(__name__)
 
 
 def lint(host, options):
     ports_to_lint = [host.port_factory.get(name) for name in host.port_factory.all_port_names(options.platform)]
     files_linted = set()
 
     failures = []
     for port_to_lint in ports_to_lint:
         expectations_dict = port_to_lint.all_expectations_dict()
@@ skipping 78 matching lines @@
         # to run tests against the test platform interactively, which is useful for
         # debugging test failures.
         from webkitpy.common.host_mock import MockHost
         host = MockHost()
     else:
         host = Host()
 
     try:
         exit_status = run_checks(host, options, stderr)
     except KeyboardInterrupt:
-        exit_status = INTERRUPTED_EXIT_STATUS
+        exit_status = exit_codes.INTERRUPTED_EXIT_STATUS
     except Exception as error:  # pylint: disable=broad-except
         print >> stderr, '\n%s raised: %s' % (error.__class__.__name__, error)
         traceback.print_exc(file=stderr)
-        exit_status = EXCEPTIONAL_EXIT_STATUS
+        exit_status = exit_codes.EXCEPTIONAL_EXIT_STATUS
 
     return exit_status