status: --quiet reflects changes on its exit code

Fix #1519

dvc/command/status.py

@@ -35,7 +35,10 @@ class CmdDataStatus(CmdDataBase):
                                      all_tags=self.args.all_tags,
                                      with_deps=self.args.with_deps)
             if st:
-                self._show(st, indent)
+                if self.args.quiet:
+                    return 1
+                else:
+                    self._show(st, indent)
             else:
                 logger.info(self.UP_TO_DATE_MSG)
 

tests/test_status.py

@@ -0,0 +1,19 @@
+import os
+
+from dvc.main import main
+
+from tests.basic_env import TestDvc
+
+
+class TestStatus(TestDvc):
+    def test_quiet(self):
+        self.dvc.add(self.FOO)
+
+        ret = main(['status', '--quiet'])
+        self.assertEqual(ret, 0)
+
+        os.remove(self.FOO)
+        os.rename(self.BAR, self.FOO)
+
+        ret = main(['status', '--quiet'])
+        self.assertEqual(ret, 1)