Re: [PATCH 08/24] tools: bpftool: update bpftool-prog.rst reference

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2021-09-16 13:30 UTC+0200 ~ Mauro Carvalho Chehab
<mchehab+huawei@xxxxxxxxxx>

> [PATCH] scripts: documentation-file-ref-check: fix bpf selftests path
> 
> tools/testing/selftests/bpf/test_bpftool_synctypes.py use
> relative patches on the top of BPFTOOL_DIR:
> 
> 	BPFTOOL_DIR = os.path.join(LINUX_ROOT, 'tools/bpf/bpftool')
> 
> Change the script to automatically convert:
> 
> 	testing/selftests/bpf -> bpf/bpftool
> 
> In order to properly check the files used by such script.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
> 
> diff --git a/scripts/documentation-file-ref-check b/scripts/documentation-file-ref-check
> index 7187ea5e5149..2d91cfe11cd2 100755
> --- a/scripts/documentation-file-ref-check
> +++ b/scripts/documentation-file-ref-check
> @@ -144,6 +144,7 @@ while (<IN>) {
>  		if ($f =~ m/tools/) {
>  			my $path = $f;
>  			$path =~ s,(.*)/.*,$1,;
> +			$path =~ s,testing/selftests/bpf,bpf/bpftool,;
>  			next if (grep -e, glob("$path/$ref $path/../$ref $path/$fulref"));
>  		}
>  
> 
> 
> 

I tested the patch and it works well on my side.

However, this looks a bit fragile to me. There is no particular reason
to have testing/selftests/bpf point to bpf/bpftool other than to
accommodate the current case, we could imagine other selftest files
pointing to other parts of the documentation in the future. I would
instead make an exception for test_bpftool_synctypes.py specifically
(other selftest files don't usually parse documentation anyway).
Alternatively, I would look at excluding lines where the path is used in
code (tricky to detect), maybe at least when used with os.path.join():

    next if ($ln =~ m,os\.path\.join\([^\,]*\,\s*['"]$fulref,);

But I'm not familiar with documentation-file-ref-check in the first
place, so these are just my two cents.

Thanks,
Quentin



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