Re: [PATCH] Allow whitespace before a trailer

[Konstantin Ryabitsev <konstantin@linuxfoundation.org>]

On Tue, Dec 14, 2021 at 03:43:27PM -0600, Rob Herring wrote:
> Currently, b4 fails to find and add trailers with leading whitespace. Let's
> be a bit more forgiving and allow for that case.

Okay, I think this is fairly safe and hopefully won't result in more
false-positives.

> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Rob Herring <robh@kernel.org>
> ---
> This thread exhibits the problem:
> https://lore.kernel.org/r/20211206174113.2295616-1-robh%40kernel.org
> 
> Note that patchwork also fails on this. Between fixing b4 or Greg, I 
> went with b4. :)
> 
> ---
>  b4/__init__.py | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/b4/__init__.py b/b4/__init__.py
> index 11c287eb3433..a4add56c5f80 100644
> --- a/b4/__init__.py
> +++ b/b4/__init__.py
> @@ -1397,7 +1397,7 @@ class LoreMessage:
>          was_trailer = False
>          for line in body.split('\n'):
>              line = line.strip('\r')
> -            matches = re.search(r'^(\w\S+):\s+(\S.*)', line, flags=re.I)
> +            matches = re.search(r'^\s?(\w\S+):\s+(\S.*)', line, flags=re.I)

I used a \s* instead, since there may be more than a single whitespace
character. It's in master and stable-0.8.y.

>              if matches:
>                  groups = list(matches.groups())
>                  # We only accept headers if we haven't seen any non-trailer lines

Thanks,
-K