linux-kernel - Re: outside repository fatal error

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Date:   Sun, 20 Sep 2020 08:34:46 -0700
From:   Joe Perches <joe@...ches.com>
To:     Julia Lawall <julia.lawall@...ia.fr>, apw@...onical.com
Cc:     linux-kernel@...r.kernel.org, linux@...musvillemoes.dk
Subject: Re: outside repository fatal error

On Sun, 2020-09-20 at 13:53 +0200, Julia Lawall wrote:
> The commit bcf4271d4bc3 ("checkpatch: allow not using -f with files that
> are in git") in linux-next seems to cause checkpatch to fail on a file
> containing a patch if that file is not in the directory containing the
> Linux kernel.

Thanks for the report.

> Is that intentional?

No.  It doesn't really fail, it just emits a fatal
warning from git.

I believe this makes it better by silencing the error.
---
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 3e474072aa90..469f8e7456df 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -981,7 +981,7 @@ sub git_is_single_file {
 
 	return 0 if ((which("git") eq "") || !(-e "$gitroot"));
 
-	my $output = `${git_command} ls-files -- $filename`;
+	my $output = `${git_command} ls-files -- $filename 2>/dev/null`;
 	my $count = $output =~ tr/\n//;
 	return $count eq 1 && $output =~ m{^${filename}$};
 }