linux-kernel - RE: [BUGFIX PATCH] selftests: Use real temporary working directory for archiving

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Date:   Tue, 8 Oct 2019 23:39:40 +0000
From:   <Tim.Bird@...y.com>
To:     <mhiramat@...nel.org>, <shuah@...nel.org>
CC:     <linux-kselftest@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <jaswinder.singh@...aro.org>
Subject: RE: [BUGFIX PATCH] selftests: Use real temporary working directory
 for archiving



> -----Original Message-----
> From: Masami Hiramatsu on Thursday, October 03, 2019 7:13 PM
> 
> Use real temporary working directory for generating kselftest
> archive.
> 
> tools/testing/selftests/kselftest directory has been used for
> the temporary working directory for making a tar archive from
> gen_kselftest_tar.sh, and it removes the directory for cleanup.
> 
> However, since the kselftest directory became a part of the
> repository, it must not be used as a working dir.

I'm not objecting to the test, but I would like to understand this
point better.  Under normal circumstances (i.e. when not using O= or KBUILD_OUTPUT)
the rest of the kernel directory structure holds generated files.
What is the issue with using kselftest to hold generated files?
 -- Tim

> 
> Introduce mktemp to prepare a temporary working directory
> for archiving kselftests.
> 
> Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
> ---
>  tools/testing/selftests/gen_kselftest_tar.sh |    8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/tools/testing/selftests/gen_kselftest_tar.sh
> b/tools/testing/selftests/gen_kselftest_tar.sh
> index a27e2eec3586..eba1e9987ffc 100755
> --- a/tools/testing/selftests/gen_kselftest_tar.sh
> +++ b/tools/testing/selftests/gen_kselftest_tar.sh
> @@ -38,16 +38,16 @@ main()
>  	esac
>  	fi
> 
> -	install_dir=./kselftest
> +	tmpdir=`mktemp -d ./install-XXXXXX` || exit 1
> 
>  # Run install using INSTALL_KSFT_PATH override to generate install
>  # directory
> -./kselftest_install.sh
> -tar $copts kselftest${ext} $install_dir
> +./kselftest_install.sh $tmpdir
> +tar $copts kselftest${ext} -C $tmpdir kselftest
>  echo "Kselftest archive kselftest${ext} created!"
> 
>  # clean up install directory
> -rm -rf kselftest
> +rm -rf $tmpdir
>  }
> 
>  main "$@"