linux-kernel - Re: [PATCH v5 1/2] check-uapi: Introduce check-uapi.sh

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Date:   Thu, 13 Apr 2023 19:03:22 +0200
From:   Nicolas Schier <nicolas@...sle.eu>
To:     John Moon <quic_johmoo@...cinc.com>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Arnd Bergmann <arnd@...db.de>,
        Bjorn Andersson <andersson@...nel.org>,
        Todd Kjos <tkjos@...gle.com>,
        Matthias Maennich <maennich@...gle.com>,
        Giuliano Procida <gprocida@...gle.com>,
        kernel-team@...roid.com, libabigail@...rceware.org,
        Jordan Crouse <jorcrous@...zon.com>,
        Trilok Soni <quic_tsoni@...cinc.com>,
        Satya Durga Srinivasu Prabhala <quic_satyap@...cinc.com>,
        Elliot Berman <quic_eberman@...cinc.com>,
        Guru Das Srinagesh <quic_gurus@...cinc.com>
Subject: Re: [PATCH v5 1/2] check-uapi: Introduce check-uapi.sh

On Mon, Apr 10, 2023 at 07:03:05PM +0900 Masahiro Yamada wrote:
[...]
> [2] Be careful!
> 
> 
> While testing the patch submissions of this,
> I messed up my repository multiple times.
> 
> The script takes some time because it builds many objects
> internally.
> 
> However, once this script starts running, you must not hit Ctrl-C.
> If you do it, your repository will be sprinkled with a ton
> of untracked files.
> 
> Apply this patch, and run "./scripts/check-uapi.sh -p v6.0"
> and hit Ctrl-C.
> 
> Repeat it a couple of times, and "git status" will show you
> something horrible.
> 
> 
> You will never know when git is checking out a commit
> because this script hides it by 'git checkout --quiet'.
> 
> 
> So, this tool should show a caveat at least.
> 
> 
> 'git checkout' should not be hidden, or
> maybe a caveat message should be shown.
> 
> 
> CAVEAT
> This tool runs 'git checkout' a couple of times internally.
> If you interrupt it, your worktree might be messed up.

John, did you consider using git export for obtaining a source tree that
can be used for headers_install and the following comparison, instead of
git stash+checkout?  AFACS the script does not depend on any other git
functionality than providing a specific version of the source tree.  I am
pretty sure that leaving the original working copy in its original state
is supporting the script's popularity.

Kind regards,
Nicolas