Create new json exporter

Now the json format which was exported by `rally task results` is too old,
We expect to use `rally task report --json` instead of it.

New json exporter command:
    rally task report --json --uuid <task_uuid> --out <dest_file>
    rally task export --uuid <task_uuid> --type json --to <dest_file>

Change-Id: Idbb20513ec1013d0f2b7a7458dc8bffef4771e84

etc/rally.bash_completion

@@ -39,7 +39,7 @@ _rally()
     OPTS["task_export"]="--uuid --type --to"
     OPTS["task_import"]="--file --deployment --tag"
     OPTS["task_list"]="--deployment --all-deployments --status --tag --uuids-only"
-    OPTS["task_report"]="--out --open --html --html-static --uuid"
+    OPTS["task_report"]="--out --open --html --html-static --json --uuid"
     OPTS["task_results"]="--uuid"
     OPTS["task_sla-check"]="--uuid --json"
     OPTS["task_sla_check"]="--uuid --json"
@@ -96,4 +96,4 @@ _rally()
     return 0
 }
 
-complete -o filenames -F _rally rally
+complete -o filenames -F _rally rally

tests/ci/rally_gate_functions.sh

@@ -134,6 +134,8 @@ function run () {
     gzip -9 rally-plot/detailed_with_iterations.txt
     rally task report --html-static --out rally-plot/results.html
     gzip -9 rally-plot/results.html
+    rally task report --json --out rally-plot/new_results.json
+    gzip -9 rally-plot/new_results.json
     rally task export --type junit-xml --to rally-plot/junit.xml
     gzip -9 rally-plot/junit.xml
 

tests/functional/test_cli_task.py

@@ -91,7 +91,7 @@ class TaskTestCase(unittest.TestCase):
 
     def _get_task_uuid(self, output):
         return re.search(
-            r"\trally task results (?P<uuid>[0-9a-f\-]{36})",
+            r"\trally task report (?P<uuid>[0-9a-f\-]{36})",
             output).group("uuid")
 
     def test_status(self):
@@ -363,6 +363,41 @@ class TaskTestCase(unittest.TestCase):
         self.assertTrue(os.path.exists(html_report))
         self._assert_html_report_libs_are_embedded(html_report)
 
+    def _assert_json_report(self, file_path):
+        results = json.loads(open(file_path).read())
+        self.assertIn("info", results)
+        self.assertIn("tasks", results)
+        # TODO(chenhb): We will switch to check this
+        # json via json schema in next patch
+        for task in results["tasks"]:
+            self.assertIn("subtasks", task)
+            for subtask in task["subtasks"]:
+                self.assertIn("workloads", subtask)
+
+    def test_report_one_uuid_with_json(self):
+        rally = utils.Rally()
+        cfg = self._get_sample_task_config()
+        config = utils.TaskConfig(cfg)
+        rally("task start --task %s" % config.filename)
+        json_report = rally.gen_report_path(extension="json")
+        rally("task report --out %s --json" % json_report)
+        self.assertTrue(os.path.exists(json_report))
+        self._assert_json_report(json_report)
+
+    def test_report_bunch_uuids_with_json(self):
+        rally = utils.Rally()
+        cfg = self._get_sample_task_config()
+        config = utils.TaskConfig(cfg)
+        task_uuids = []
+        for i in range(3):
+            res = rally("task start --task %s" % config.filename)
+            task_uuids.append(self._get_task_uuid(res))
+        json_report = rally.gen_report_path(extension="json")
+        rally("task report --json --uuid %s --out %s"
+              % (" ".join(task_uuids), json_report))
+        self.assertTrue(os.path.exists(json_report))
+        self._assert_json_report(json_report)
+
     def test_trends(self):
         cfg1 = {
             "Dummy.dummy": [