linux-kernel - [PATCH v3] kunit: tool: Assert the version requirement

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Date:   Mon, 12 Jul 2021 19:52:58 +0000
From:   SeongJae Park <sj38.park@...il.com>
To:     skhan@...uxfoundation.org
Cc:     brendanhiggins@...gle.com, dlatypov@...gle.com,
        linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com,
        linux-kernel@...r.kernel.org, SeongJae Park <sjpark@...zon.de>
Subject: [PATCH v3] kunit: tool: Assert the version requirement

From: SeongJae Park <sjpark@...zon.de>

Commit 87c9c1631788 ("kunit: tool: add support for QEMU") on the 'next'
tree adds 'from __future__ import annotations' in 'kunit_kernel.py'.
Because it is supported on only >=3.7 Python, people using older Python
will get below error:

    Traceback (most recent call last):
      File "./tools/testing/kunit/kunit.py", line 20, in <module>
        import kunit_kernel
      File "/home/sjpark/linux/tools/testing/kunit/kunit_kernel.py", line 9
        from __future__ import annotations
        ^
    SyntaxError: future feature annotations is not defined

This commit adds a version assertion in 'kunit.py', so that people get
more explicit error message like below:

    Traceback (most recent call last):
      File "./tools/testing/kunit/kunit.py", line 15, in <module>
        assert sys.version_info >= (3, 7), "Python version is too old"
    AssertionError: Python version is too old

Signed-off-by: SeongJae Park <sjpark@...zon.de>
Acked-by: Daniel Latypov <dlatypov@...gle.com>
---

Changes from v2
- Fix mismatch of Signed-off and from

Changes from v1
- Add assertion failure message (Daniel Latypov)
- Add Acked-by: Daniel Latypov <dlatypov@...gle.com>

 tools/testing/kunit/kunit.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
index be8d8d4a4e08..6276ce0c0196 100755
--- a/tools/testing/kunit/kunit.py
+++ b/tools/testing/kunit/kunit.py
@@ -12,6 +12,8 @@ import sys
 import os
 import time
 
+assert sys.version_info >= (3, 7), "Python version is too old"
+
 from collections import namedtuple
 from enum import Enum, auto
 
-- 
2.17.1