[PATCH v2 1/2] kunit: tool: Respect '.kunitconfig' in 'build_dir'

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From: SeongJae Park <sjpark@xxxxxxxxx>

Commit d43c7fb05765 ("kunit: tool: fix improper treatment of file
location") removed 'kunit_kernel.kunitconfig_path' modification for the
'--build_dir' argument.  As a result, running kunit with '--build_dir'
failed with below error message:

    Traceback (most recent call last):
      File "./tools/testing/kunit/kunit.py", line 325, in <module>
        main(sys.argv[1:])
      File "./tools/testing/kunit/kunit.py", line 245, in main
        linux = kunit_kernel.LinuxSourceTree()
      File "/home/sjpark/linux/tools/testing/kunit/kunit_kernel.py", line 109, in __init__
        self._kconfig.read_from_file(kunitconfig_path)
      File "/home/sjpark/linux/tools/testing/kunit/kunit_config.py", line 88, in read_from_file
        with open(path, 'r') as f:
    FileNotFoundError: [Errno 2] No such file or directory: '.kunitconfig'

The error removed after commit 82206a0c06cc ("kunit: tool: handle when
.kunit exists but .kunitconfig does not").  However, it was not the
intention of the commit.  It hides the error by ignoring the
'.kunitconfig' in the '--build_dir'.

This commit makes the tool to respect '.kunitconfig' in '--build_dir'
again, while respecting the constantness of
'kunit_kernel.kunitconfig_path', as modifying the variable makes the
'kunit_tool_test.py' fails

Fixes: d43c7fb05765 ("kunit: tool: fix improper treatment of file location")
Signed-off-by: SeongJae Park <sjpark@xxxxxxxxx>
---
 tools/testing/kunit/kunit.py        | 26 ++++++++++++++------------
 tools/testing/kunit/kunit_kernel.py |  4 ++--
 2 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
index ebf5f5763dee..8bee2a5fee27 100755
--- a/tools/testing/kunit/kunit.py
+++ b/tools/testing/kunit/kunit.py
@@ -44,10 +44,10 @@ class KunitStatus(Enum):
 	BUILD_FAILURE = auto()
 	TEST_FAILURE = auto()
 
-def create_default_kunitconfig():
-	if not os.path.exists(kunit_kernel.kunitconfig_path):
-		shutil.copyfile('arch/um/configs/kunit_defconfig',
-				kunit_kernel.kunitconfig_path)
+def create_default_kunitconfig(build_dir=''):
+	kunitconfig = os.path.join(build_dir, kunit_kernel.kunitconfig_path)
+	if not os.path.exists(kunitconfig):
+		shutil.copyfile('arch/um/configs/kunit_defconfig', kunitconfig)
 
 def get_kernel_root_path():
 	parts = sys.argv[0] if not __file__ else __file__
@@ -61,7 +61,7 @@ def config_tests(linux: kunit_kernel.LinuxSourceTree,
 	kunit_parser.print_with_timestamp('Configuring KUnit Kernel ...')
 
 	config_start = time.time()
-	create_default_kunitconfig()
+	create_default_kunitconfig(request.build_dir)
 	success = linux.build_reconfig(request.build_dir, request.make_options)
 	config_end = time.time()
 	if not success:
@@ -258,15 +258,17 @@ def main(argv, linux=None):
 	if get_kernel_root_path():
 		os.chdir(get_kernel_root_path())
 
+	kunitconfig_path = os.path.join(cli_args.build_dir,
+			kunit_kernel.kunitconfig_path)
 	if cli_args.subcommand == 'run':
 		if not os.path.exists(cli_args.build_dir):
 			os.mkdir(cli_args.build_dir)
 
-		if not os.path.exists(kunit_kernel.kunitconfig_path):
-			create_default_kunitconfig()
+		if not os.path.exists(kunitconfig_path):
+			create_default_kunitconfig(cli_args.build_dir)
 
 		if not linux:
-			linux = kunit_kernel.LinuxSourceTree()
+			linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir)
 
 		request = KunitRequest(cli_args.raw_output,
 				       cli_args.timeout,
@@ -284,10 +286,10 @@ def main(argv, linux=None):
 			os.mkdir(cli_args.build_dir)
 
 		if not os.path.exists(kunit_kernel.kunitconfig_path):
-			create_default_kunitconfig()
+			create_default_kunitconfig(cli_args.build_dir)
 
 		if not linux:
-			linux = kunit_kernel.LinuxSourceTree()
+			linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir)
 
 		request = KunitConfigRequest(cli_args.build_dir,
 					     cli_args.make_options)
@@ -299,7 +301,7 @@ def main(argv, linux=None):
 			sys.exit(1)
 	elif cli_args.subcommand == 'build':
 		if not linux:
-			linux = kunit_kernel.LinuxSourceTree()
+			linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir)
 
 		request = KunitBuildRequest(cli_args.jobs,
 					    cli_args.build_dir,
@@ -313,7 +315,7 @@ def main(argv, linux=None):
 			sys.exit(1)
 	elif cli_args.subcommand == 'exec':
 		if not linux:
-			linux = kunit_kernel.LinuxSourceTree()
+			linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir)
 
 		exec_request = KunitExecRequest(cli_args.timeout,
 						cli_args.build_dir,
diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py
index b557b1e93f98..7dd4268665a8 100644
--- a/tools/testing/kunit/kunit_kernel.py
+++ b/tools/testing/kunit/kunit_kernel.py
@@ -109,9 +109,9 @@ def get_kconfig_path(build_dir):
 class LinuxSourceTree(object):
 	"""Represents a Linux kernel source tree with KUnit tests."""
 
-	def __init__(self):
+	def __init__(self, build_dir):
 		self._kconfig = kunit_config.Kconfig()
-		self._kconfig.read_from_file(kunitconfig_path)
+		self._kconfig.read_from_file(os.path.join(build_dir, kunitconfig_path))
 		self._ops = LinuxSourceTreeOperations()
 		signal.signal(signal.SIGINT, self.signal_handler)
 
-- 
2.17.1




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