linux-kernel - Re: [PATCH] checkpatch: Print some info if no filenames are given

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Date:   Fri, 14 May 2021 21:26:05 -0700
From:   Joe Perches <joe@...ches.com>
To:     Tiezhu Yang <yangtiezhu@...ngson.cn>,
        Andy Whitcroft <apw@...onical.com>,
        Dwaipayan Ray <dwaipayanray1@...il.com>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] checkpatch: Print some info if no filenames are given

On Sat, 2021-05-15 at 12:15 +0800, Tiezhu Yang wrote:
> After commit 45107ff6d526 ("checkpatch: if no filenames then read stdin"),
> if no filenames are given, it will read patch from stdin rather than exit
> directly, it is better to print some info about what to do next, otherwise
> it is a bit confusing whether the script hangs.

I think this is unnecessary.
It's like trying to make cat without command line arguments emit something.

> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
[]
> @@ -361,6 +361,8 @@ if ($^V && $^V lt $minimum_perl_version) {
>  
> 
>  #if no filenames are given, push '-' to read patch from stdin
>  if ($#ARGV < 0) {
> +	print "$P: missing patchfile or -f file\n";
> +	print "Use --help if necessary or read patch from stdin\n";
>  	push(@ARGV, '-');
>  }
>  
>