Re: [PATCH] checkpatch: scripts/spdxcheck.py now requires python3

[Joe Perches <joe@perches.com>]

On Wed, 2021-05-05 at 14:17 -0700, Guenter Roeck wrote:
> Since commit d0259c42abff ("spdxcheck.py: Use Python 3"), spdxcheck.py
> explicitly expects to run as python3 script. If "python" still points to
> python v2.7 and the script is executed with "python scripts/spdxcheck.py",
> the following error may be seen even if git-python is installed for
> python3.
> 
> Traceback (most recent call last):
>   File "scripts/spdxcheck.py", line 10, in <module>
>     import git
> ImportError: No module named git
> 
> To fix the problem, check for the existence of python3, check if
> the script is executable and not just for its existence, and execute
> it directly.
> 
> Cc: Bert Vermeulen <bert@biot.com>
> Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Seems sensible, thanks.

> ---
>  scripts/checkpatch.pl | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index ccb412a74725..8a1b782dd7e7 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -1084,10 +1084,10 @@ sub is_maintained_obsolete {
>  sub is_SPDX_License_valid {
>  	my ($license) = @_;
>  
> 
> -	return 1 if (!$tree || which("python") eq "" || !(-e "$root/scripts/spdxcheck.py") || !(-e "$gitroot"));
> +	return 1 if (!$tree || which("python3") eq "" || !(-x "$root/scripts/spdxcheck.py") || !(-e "$gitroot"));
>  
> 
>  	my $root_path = abs_path($root);
> -	my $status = `cd "$root_path"; echo "$license" | python scripts/spdxcheck.py -`;
> +	my $status = `cd "$root_path"; echo "$license" | scripts/spdxcheck.py -`;
>  	return 0 if ($status ne "");
>  	return 1;
>  }