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From:   leobras@redhat.com
To:     Masahiro Yamada <masahiroy@kernel.org>
Cc:     Leonardo Bras <leobras@redhat.com>,
        Randy Dunlap <rdunlap@infradead.org>,
        Nicolas Schier <nicolas@fjasle.eu>,
        Nathan Chancellor <nathan@kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org
Subject: Re: [RFC PATCH v5 1/1] scripts: Introduce a default git.orderFile
Date:   Mon, 11 Dec 2023 19:41:04 -0300
Message-ID: <ZXeQAHXRG59rTWs6@LeoBras>
In-Reply-To: <ZXeHRmTIMmIqeNxn@LeoBras>
References: <20231208181802.88528-3-leobras@redhat.com> <CAK7LNAQk3Nm53qf95p7yQbSQ_M3phD_n5OMGxFWorGg_4fpQZg@mail.gmail.com> <ZXcLEKSBg9Bd1qEu@LeoBras> <CAK7LNARUYBS3Nd83M7uEtPt_GjUGK2jDGEJk9SBBedUKgb911g@mail.gmail.com> <ZXeHRmTIMmIqeNxn@LeoBras>
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From: Leonardo Bras <leobras@redhat.com>

On Mon, Dec 11, 2023 at 07:03:50PM -0300, lsoaresp@redhat.com wrote:
> From: Leonardo Bras <leobras@redhat.com>
> 
> On Tue, Dec 12, 2023 at 03:05:38AM +0900, Masahiro Yamada wrote:
> > On Mon, Dec 11, 2023 at 10:14 PM <lsoaresp@redhat.com> wrote:
> > >
> > > From: Leonardo Bras <masahiroy@kernel.org>
> > >
> > > On Sun, Dec 10, 2023 at 04:13:54AM +0900, Masahiro Yamada wrote:
> > > > On Sat, Dec 9, 2023 at 3:19 AM Leonardo Bras <leobras@redhat.com> wrote:
> > > > >
> > > > > When reviewing patches, it looks much nicer to have some changes shown
> > > > > before others, which allow better understanding of the patch before the
> > > > > the .c files reviewing.
> > > > >
> > > > > Introduce a default git.orderFile, in order to help developers getting the
> > > > > best ordering easier.
> > > > >
> > > > > Signed-off-by: Leonardo Bras <leobras@redhat.com>
> > > > > Acked-by: Randy Dunlap <rdunlap@infradead.org>
> > > > >
> > > > > ---
> > > > > Changes since RFCv4:
> > > > > - Added scripts/* into "build system" section
> > > > > - Added "git-specific" section with this script and .gitignore
> > > > > - Thanks for this feedback Nicolas!
> > > > >
> > > > > Changes since RFCv3:
> > > > > - Added "*types.h" matching so type headers appear before regular headers
> > > > > - Removed line ends ($) in patterns: they previously provided a
> > > > >   false-positive
> > > > > - Fixed build patterns to allow matching Kconfig, Kbuild & Makefile
> > > > >   in any subdirectory
> > > > >
> > > > > Changes since RFCv2:
> > > > > - Fixed licence comment to from /**/ to #
> > > > > - Fixed filename in how-to comment
> > > > > - Fix build order: Kconfig -> Kbuild -> Makefile
> > > > > - Add *.mk extension
> > > > > - Add line-ends ($) to make sure and get the correct extensions
> > > > > - Thanks Masahiro Yamada for above suggestions!
> > > > > - 1 Ack, thanks Randy!
> > > > >
> > > > > Changes since RFCv1:
> > > > > - Added Kconfig* (thanks Randy Dunlap!)
> > > > > - Changed Kbuild to Kbuild* (improve matching)
> > > > >
> > > > >
> > > > >  scripts/git.orderFile | 39 +++++++++++++++++++++++++++++++++++++++
> > > > >  1 file changed, 39 insertions(+)
> > > > >  create mode 100644 scripts/git.orderFile
> > > > >
> > > > > diff --git a/scripts/git.orderFile b/scripts/git.orderFile
> > > > > new file mode 100644
> > > > > index 0000000000000..31649ff53d22c
> > > > > --- /dev/null
> > > > > +++ b/scripts/git.orderFile
> > > > > @@ -0,0 +1,39 @@
> > > > > +# SPDX-License-Identifier: GPL-2.0
> > > > > +
> > > > > +# order file for git, to produce patches which are easier to review
> > > > > +# by diffing the important stuff like header changes first.
> > > > > +#
> > > > > +# one-off usage:
> > > > > +#   git diff -O scripts/git.orderFile ...
> > > > > +#
> > > > > +# add to git config:
> > > > > +#   git config diff.orderFile scripts/git.orderFile
> > > > > +#
> > > > > +
> > > > > +MAINTAINERS
> > > > > +
> > > > > +# Documentation
> > > > > +Documentation/*
> > > > > +*.rst
> > > > > +
> > > > > +# git-specific
> > > > > +.gitignore
> > > > > +scripts/git.orderFile
> > > >
> > >
> > > Hello Masahiro, thanks for the feedback!
> > >
> > > >
> > > >
> > > > I think scripts/git.orderFile should be part of
> > > > "scripts/*" below.
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > > +
> > > > > +# build system
> > > > > +*Kconfig*
> > > > > +*Kbuild*
> > > > > +*Makefile*
> > > >
> > > > I do not like this because "foo-Makefile-bar"
> > > > is not a Makefile, but would match "*Makefile*".
> > >
> > > That makes sense.
> > >
> > > >
> > > >
> > > > If you do not use wildcard at all, 'Makefile'
> > > > will match to the root-dir and sub-directories.
> > >
> > > I tried a quick test here changing an mm/*.c file and mm/Makefile, and the
> > > above will print the .c file changes first in any situation here, so it
> > > won't have the desired behavior.
> > 
> > 
> > 
> > Hmm, you are right.
> > 
> > 
> > OK, your suggestion below looks good.
> > 
> > 
> > Thanks.
> 
> Thank you for this feedback!
> 
> I will send a v6 shortly.
> 
> Thank you!
> Leo
> 
> > 
> > 
> > 
> > 
> > 
> > 
> > >
> > > But if we want to achieve the above we can do so with a slight change in
> > > the suggestion:
> > >
> > > >
> > >>
> > > > Kconfig
> > > > */Kconfig*
> > > > Kbuild
> > > > Makefile
> > > */Makefile
> > > > *.mak
> > > > *.mk
> > > > scripts/*
> > > >
> > > >
> > > > may satisfy your needs mostly.
> > > >
> > >
> > > I have tried the following in the Kernel root:
> > >
> > > $ find . |grep Makefile |grep -v Makefile$
> > > ./arch/arm/mach-s3c/Makefile.s3c64xx
> > > ./arch/mips/Makefile.postlink
> > > ./arch/powerpc/Makefile.postlink
> > > ./arch/um/Makefile-os-Linux
> > > ./arch/um/Makefile-skas
> > > ./arch/um/scripts/Makefile.rules
> > > ./arch/x86/Makefile_32.cpu
> > > ./arch/x86/Makefile.um
> > > ./arch/x86/Makefile.postlink
> > > ./arch/riscv/Makefile.postlink
> > > ./drivers/firmware/efi/libstub/Makefile.zboot
> > > ./drivers/usb/serial/Makefile-keyspan_pda_fw
> > > [...]
> > >
> > > $ find . |grep Kbuild |grep -v Kbuild$
> > > ./arch/mips/Kbuild.platforms
> > > ./scripts/Kbuild.include
> > >
> > > Which leads to an honest question:
> > > Don't we want to show changes on those files before C files, for example?
> > >
> > > If so, we need something like:
> > >
> > > # build system
> > > Kconfig*
> > > */Kconfig*
> > > Kbuild*
> > > */Kbuild*
> > > Makefile*
> > > */Makefile*
> > > *.mak
> > > *.mk
> > > scripts/*
> > >
> > > It would get rid of "foo-Makefile-bar" case but still match
> > > "Makefile-bar" case, which seems to be used around.
> > >
> > > Is that ok?
> > >
> > > Thanks!
> > > Leo
> > >
> > >
> > 
> > 
> > -- 
> > Best Regards
> > Masahiro Yamada
> > 


RFCv6 patch at:
https://lore.kernel.org/all/20231211221338.127407-1-leobras@redhat.com/