Re: [PATCH v2 4/5] qemu-iotests: let "check" spawn an arbitrary test command

[Vladimir Sementsov-Ogievskiy]

23.03.2021 21:19, Paolo Bonzini wrote:
> Right now there is no easy way for "check" to print a reproducer command.
> Because such a reproducer command line would be huge, we can instead teach
> check to start a command of our choice.  This can be for example a Python
> unit test with arguments to only run a specific subtest.
>
> Move the trailing empty line to print_env(), since it always looks better
> and one caller was not adding it.

Seems you've moved this fix from one unrelated commit to another.. And it 
touches two extra files. I'd just make it a separate commit. Nitpicking. 
Separate or as is:

Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>

> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>   tests/qemu-iotests/check         | 15 ++++++++++++++-
>   tests/qemu-iotests/testenv.py    |  3 ++-
>   tests/qemu-iotests/testrunner.py |  1 -
>   3 files changed, 16 insertions(+), 3 deletions(-)
>
> diff --git a/tests/qemu-iotests/check b/tests/qemu-iotests/check
> index d1c87ceaf1..478d74e509 100755
> --- a/tests/qemu-iotests/check
> +++ b/tests/qemu-iotests/check
> @@ -19,6 +19,7 @@
>   import os
>   import sys
>   import argparse
> +import shutil
>   from findtests import TestFinder
>   from testenv import TestEnv
>   from testrunner import TestRunner
> @@ -101,7 +102,7 @@ def make_argparser() -> argparse.ArgumentParser:
>                          'rerun failed ./check command, starting from the '
>                          'middle of the process.')
>       g_sel.add_argument('tests', metavar='TEST_FILES', nargs='*',
> -                       help='tests to run')
> +                       help='tests to run, or "--" followed by a command')
>   
>       return p
>   
> @@ -114,6 +115,18 @@ if __name__ == '__main__':
>                     imgopts=args.imgopts, misalign=args.misalign,
>                     debug=args.debug, valgrind=args.valgrind)
>   
> +    if len(sys.argv) > 1 and sys.argv[-len(args.tests)-1] == '--':
> +        if not args.tests:
> +            sys.exit("missing command after '--'")
> +        cmd = args.tests
> +        env.print_env()
> +        exec_path = shutil.which(cmd[0])
> +        if exec_path is None:
> +            sys.exit('command not found: ' + cmd[0])
> +        cmd[0] = exec_path
> +        full_env = env.prepare_subprocess(cmd)
> +        os.execve(cmd[0], cmd, full_env)
> +
>       testfinder = TestFinder(test_dir=env.source_iotests)
>   
>       groups = args.groups.split(',') if args.groups else None
> diff --git a/tests/qemu-iotests/testenv.py b/tests/qemu-iotests/testenv.py
> index 341a4af4e9..6767eeeb25 100644
> --- a/tests/qemu-iotests/testenv.py
> +++ b/tests/qemu-iotests/testenv.py
> @@ -283,7 +283,8 @@ def print_env(self) -> None:
>   PLATFORM      -- {platform}
>   TEST_DIR      -- {TEST_DIR}
>   SOCK_DIR      -- {SOCK_DIR}
> -SOCKET_SCM_HELPER -- {SOCKET_SCM_HELPER}"""
> +SOCKET_SCM_HELPER -- {SOCKET_SCM_HELPER}
> +"""
>   
>           args = collections.defaultdict(str, self.get_env())
>   
> diff --git a/tests/qemu-iotests/testrunner.py b/tests/qemu-iotests/testrunner.py
> index 519924dc81..2f56ac545d 100644
> --- a/tests/qemu-iotests/testrunner.py
> +++ b/tests/qemu-iotests/testrunner.py
> @@ -316,7 +316,6 @@ def run_tests(self, tests: List[str]) -> bool:
>   
>           if not self.makecheck:
>               self.env.print_env()
> -            print()
>   
>           test_field_width = max(len(os.path.basename(t)) for t in tests) + 2
>   


--
Best regards,
Vladimir