linux-kernel - Re: diffs in changelogs

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Date:	Thu, 11 Jun 2015 20:54:34 -0700
From:	Joe Perches <joe@...ches.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org,
	Kent Overstreet <kent.overstreet@...il.com>
Subject: Re: diffs in changelogs

On Thu, 2015-06-11 at 20:21 -0700, Andrew Morton wrote:
> On Thu, 11 Jun 2015 20:12:59 -0700 Joe Perches <joe@...ches.com> wrote:
> 
> > On Thu, 2015-06-11 at 13:40 -0700, Andrew Morton wrote:
> > > People often put diff snippets in changelogs.  This causes problems
> > > when one tries to apply a file containing both the changelog and the
> > > diff because patch(1) tries to apply the diff which it found in the
> > > changelog.
> > That 
> > > eg, something like
> > > 
> > > 	git show d24a6e1087030b6da | patch -p1
> > > 
> > > will go haywire.
> > > 
> > > So can we please have a checkpatch test warning people away from doing
> > > this?
> > > 
> > > 
> > > patch(1) seems to be really promiscuous in its detection of a patch.  I
> > > haven't had much success searching for "^--- " and similar.  What works
> > > best for me is searching for "^[whitespace]@@ -".
> > 
> > I don't think that's a good test.
> > Coccinelle uses @@
> > 
> > And how did that commit actually get applied?
> 
> Good question.  Maybe `git apply' is smarter about this than patch(1)?

Dunno.  git am failed.
My guess is it was applied normally and then
git commit --amend added the other diff content

> > I tried applying it to a new branch checked out at
> > ce2b3f595e1c56639085645e0130426e443008c0, it fails.
> 
> There are tons of them:
> 
> z:/usr/src/git26> git log | grep "^[    ]*@@ -"  | wc -l
> 120
> 
> > Anyway, maybe:
> 
> Looks good, thanks.  -ENOCHANGELOG.  Please send it for real when convenient.

RFCPATCH




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