[OE-core] [PATCHv2] scripts/oe-selftest: Add support for selftest log with timestamp

[Costin Constantin]

Each time oe-selftest runs, the oe-selftest.log file is overwritten.
This patch solves it by adding time stamp to each selftest log file
and doing a symlink named as oe-selftest.log to the last one created.

Signed-off-by: Costin Constantin <costin.c.constantin at intel.com>
---
 scripts/oe-selftest | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/oe-selftest b/scripts/oe-selftest
index bc50b2a..ff3307b 100755
--- a/scripts/oe-selftest
+++ b/scripts/oe-selftest
@@ -31,6 +31,7 @@ import unittest
 import logging
 import argparse
 import subprocess
+import time as t
 
 sys.path.insert(0, os.path.dirname(os.path.realpath(__file__)) + '/lib')
 import scriptpath
@@ -43,10 +44,14 @@ from oeqa.utils.commands import runCmd, get_bb_var, get_test_layer
 from oeqa.selftest.base import oeSelfTest
 
 def logger_create():
+    log_file = "oe-selftest-" + t.strftime("%Y-%m-%d_%H:%M:%S") + ".log"
+    if os.path.exists("oe-selftest.log"): os.remove("oe-selftest.log")
+    os.symlink(log_file, "oe-selftest.log")
+
     log = logging.getLogger("selftest")
     log.setLevel(logging.DEBUG)
 
-    fh = logging.FileHandler(filename='oe-selftest.log', mode='w')
+    fh = logging.FileHandler(filename=log_file, mode='w')
     fh.setLevel(logging.DEBUG)
 
     ch = logging.StreamHandler(sys.stdout)
-- 
2.5.0