Use template to unify commands in functest/yardstick

JIRA: DOVETAIL-19

1. use jinja2 to unify commands in config files
2. it simplify the process of test execution, put the dissimilarity in config
3. add precondition/postcondition for functest/yardstick config

Change-Id: Ib996b11ea065b61910b34b78191bb7b1ffd92e59
Signed-off-by: Leo Wang <grakiss.wanglei@huawei.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/scripts/parser.py b/scripts/parser.py
index c0b18e13..1c0c0450 100644
--- a/scripts/parser.py
+++ b/scripts/parser.py
@@ -7,3 +7,34 @@
 # http://www.apache.org/licenses/LICENSE-2.0
 #
 
+import jinja2
+
+
+import utils.dovetail_logger as dt_logger
+import utils.dovetail_utils as dt_utils
+
+logger = dt_logger.Logger('parser.py').getLogger()
+
+from conf.dovetail_config import *
+
+class Parser:
+    '''preprocess configuration files'''
+
+    @classmethod
+    def parse_cmd(cls, cmd, testcase):
+        cmd_lines = None
+        try:
+            template = jinja2.Template(cmd, undefined=jinja2.StrictUndefined)
+            kwargs = {}
+            for arg in dovetail_config['parameters']:
+                path = eval(arg['path'])
+                logger.debug('name: %s, eval path: %s ' % (arg['name'], path))
+                kwargs[arg['name']] = dt_utils.get_obj_by_path(testcase.testcase,path)
+
+            logger.debug('kwargs: %s' %  kwargs)
+            cmd_lines = template.render(**kwargs)
+        except Exception as e:
+            logger.error('failed to parse cmd %s, exception:%s' % (cmd, e))
+            return None
+
+        return cmd_lines