Re: git-log --pretty=format:'[%x00]%w(0,0,1)' doesn't print NUL and "]"

From: Jeff King <peff@peff.net>
Date: Dec 29, 2011, 19:23 UTC
Message-ID: <20111229192328.GA18723@sigill.intra.peff.net>
In-Reply-To: <CANjopZFqiy+Ai4u6QYYnza5J7A3NAt-f17yR9AsYok-g3Hbb3w@mail.gmail.com>

On Fri, Dec 30, 2011 at 03:41:20AM +0900, Tanaka Akira wrote:

Show 9 quoted lines

> I found that git-log doesn't print characters in --pretty option as follows.
> 
>   % git log --pretty=format:'[%x00]%w(0,0,1)' |od -c
>   0000000   [  \n   [  \n   [  \n   [  \n   [  \n   [  \n   [  \n   [  \n
>   *
>   0022320   [  \n   [  \n   [  \n   [
>   0022327
> 
> I think NUL and "]" should be printed.

I think there is a bug in strbuf_add_indented_text, which uses strchrnul, even though a strbuf may contain literal NULs. Although one could argue that trying to wrap a NUL is questionable (after all, what is its character width?), the current behavior seems pretty wrong.

I think the whole wrapping callchain needs to be adjusted to handle arbitrary bytes (there are also several checks in strbuf_add_wrapped_text for NUL terminators).

-Peff