[PATCH 3/3] kunit: tool: move kunitconfig parsing into __init__

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LinuxSourceTree will unceremoniously crash if the user doesn't call
read_kunitconfig() first in a number of functions.

Adn currently every place we create an instance, the caller also calls
create_kunitconfig() and read_kunitconfig().

Move these instead into __init__() so they can't be forgotten and to
reduce copy-paste.

The https://github.com/google/pytype type-checker complained that
_config wasn't initialized. With this, kunit_tool now type checks
under both pytype and mypy.

Signed-off-by: Daniel Latypov <dlatypov@xxxxxxxxxx>
---
 tools/testing/kunit/kunit.py        | 20 ++++----------------
 tools/testing/kunit/kunit_kernel.py | 19 +++++++------------
 2 files changed, 11 insertions(+), 28 deletions(-)

diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
index 08951a114654..b58fb3733cfa 100755
--- a/tools/testing/kunit/kunit.py
+++ b/tools/testing/kunit/kunit.py
@@ -256,10 +256,7 @@ def main(argv, linux=None):
 			os.mkdir(cli_args.build_dir)
 
 		if not linux:
-			linux = kunit_kernel.LinuxSourceTree()
-
-		linux.create_kunitconfig(cli_args.build_dir)
-		linux.read_kunitconfig(cli_args.build_dir)
+			linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir)
 
 		request = KunitRequest(cli_args.raw_output,
 				       cli_args.timeout,
@@ -277,10 +274,7 @@ def main(argv, linux=None):
 			os.mkdir(cli_args.build_dir)
 
 		if not linux:
-			linux = kunit_kernel.LinuxSourceTree()
-
-		linux.create_kunitconfig(cli_args.build_dir)
-		linux.read_kunitconfig(cli_args.build_dir)
+			linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir)
 
 		request = KunitConfigRequest(cli_args.build_dir,
 					     cli_args.make_options)
@@ -292,10 +286,7 @@ def main(argv, linux=None):
 			sys.exit(1)
 	elif cli_args.subcommand == 'build':
 		if not linux:
-			linux = kunit_kernel.LinuxSourceTree()
-
-		linux.create_kunitconfig(cli_args.build_dir)
-		linux.read_kunitconfig(cli_args.build_dir)
+			linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir)
 
 		request = KunitBuildRequest(cli_args.jobs,
 					    cli_args.build_dir,
@@ -309,10 +300,7 @@ def main(argv, linux=None):
 			sys.exit(1)
 	elif cli_args.subcommand == 'exec':
 		if not linux:
-			linux = kunit_kernel.LinuxSourceTree()
-
-		linux.create_kunitconfig(cli_args.build_dir)
-		linux.read_kunitconfig(cli_args.build_dir)
+			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 bda7c4fd4d3e..79793031d2c4 100644
--- a/tools/testing/kunit/kunit_kernel.py
+++ b/tools/testing/kunit/kunit_kernel.py
@@ -129,10 +129,15 @@ def get_outfile_path(build_dir) -> str:
 class LinuxSourceTree(object):
 	"""Represents a Linux kernel source tree with KUnit tests."""
 
-	def __init__(self) -> None:
-		self._ops = LinuxSourceTreeOperations()
+	def __init__(self, build_dir: str, defconfig=DEFAULT_KUNITCONFIG_PATH) -> None:
 		signal.signal(signal.SIGINT, self.signal_handler)
 
+		self._ops = LinuxSourceTreeOperations()
+
+		kunitconfig_path = get_kunitconfig_path(build_dir)
+		self._kconfig = kunit_config.Kconfig()
+		self._kconfig.read_from_file(kunitconfig_path)
+
 	def clean(self) -> bool:
 		try:
 			self._ops.make_mrproper()
@@ -141,16 +146,6 @@ class LinuxSourceTree(object):
 			return False
 		return True
 
-	def create_kunitconfig(self, build_dir, defconfig=DEFAULT_KUNITCONFIG_PATH) -> None:
-		kunitconfig_path = get_kunitconfig_path(build_dir)
-		if not os.path.exists(kunitconfig_path):
-			shutil.copyfile(defconfig, kunitconfig_path)
-
-	def read_kunitconfig(self, build_dir) -> None:
-		kunitconfig_path = get_kunitconfig_path(build_dir)
-		self._kconfig = kunit_config.Kconfig()
-		self._kconfig.read_from_file(kunitconfig_path)
-
 	def validate_config(self, build_dir) -> bool:
 		kconfig_path = get_kconfig_path(build_dir)
 		validated_kconfig = kunit_config.Kconfig()
-- 
2.29.2.576.ga3fc446d84-goog




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