[PATCH v4 4/5] kunit: Place 'test.log' under the 'build_dir'

[SeongJae Park <sj38.park@gmail.com>]

From: SeongJae Park <sjpark@amazon.de>

'kunit' writes the 'test.log' under the kernel source directory even
though a 'build_dir' option is given.  As users who use the option might
expect the outputs to be placed under the specified directory, this
commit modifies the logic to write the log file under the 'build_dir'.

Signed-off-by: SeongJae Park <sjpark@amazon.de>
---
 tools/testing/kunit/kunit.py        | 2 +-
 tools/testing/kunit/kunit_kernel.py | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
index 5b22241..e4250c4 100755
--- a/tools/testing/kunit/kunit.py
+++ b/tools/testing/kunit/kunit.py
@@ -105,7 +105,7 @@ def main(argv, linux=None):
 	run_parser.add_argument('--build_dir',
 				help='As in the make command, it specifies the build '
 				'directory.',
-				type=str, default=None, metavar='build_dir')
+				type=str, default='', metavar='build_dir')
 
 	run_parser.add_argument('--defconfig',
 				help='Uses a default kunitconfig.',
diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py
index c04a12e..a10c0c7 100644
--- a/tools/testing/kunit/kunit_kernel.py
+++ b/tools/testing/kunit/kunit_kernel.py
@@ -140,10 +140,10 @@ class LinuxSourceTree(object):
 			return False
 		return True
 
-	def run_kernel(self, args=[], timeout=None, build_dir=None):
+	def run_kernel(self, args=[], timeout=None, build_dir=''):
 		args.extend(['mem=256M'])
 		process = self._ops.linux_bin(args, timeout, build_dir)
-		with open('test.log', 'w') as f:
+		with open(os.path.join(build_dir, 'test.log'), 'w') as f:
 			for line in process.stdout:
 				f.write(line.rstrip().decode('ascii') + '\n')
 				yield line.rstrip().decode('ascii')
-- 
2.7.4