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Message-ID: <ZO2NVLipjlzIh0YS@bergen.fjasle.eu>
Date:   Tue, 29 Aug 2023 08:16:52 +0200
From:   Nicolas Schier <nicolas@...sle.eu>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Randy Dunlap <rdunlap@...radead.org>,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        linux-arm-kernel@...ts.infradead.org,
        linuxppc-dev@...ts.ozlabs.org, linux-riscv@...ts.infradead.org,
        linux-s390@...r.kernel.org, linux-kbuild@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH v2 0/2] kbuild: Show Kconfig fragments in "help"

On Mon 28 Aug 2023 16:17:07 GMT, Michael Ellerman wrote:
> Masahiro Yamada <masahiroy@...nel.org> writes:
> > On Sat, Aug 26, 2023 at 4:55 AM Kees Cook <keescook@...omium.org> wrote:
> >>
> >> Hi,
> >>
> >> This is my series to show *.config targets in the "help" target so these
> >> various topics can be more easily discoverd.
> >>
> >> v2:
> >>  - split .fragment from .config to hide "internal" fragments
> >
> > Please do not do this churn.
> 
> That was my idea :}
> 
> > Like Randy, I did not get "why" part quiet well,
> > but if you are eager about this,
> > you can show help message only when the following
> > ("# Help:" prefix for example) is found in the first line.
> >
> > # Help: blah blah
> > # other comment
> 
> I did think of that, but wasn't sure how to do it in make.

Something like this should do it:

	@grep -Hnm1 -e '^# Help:' $(foreach f, $(sort $(notdir $(call configfiles,*.config))), $(firstword $(call configfiles,$(f)))) | \
	 while read loc dummy helptext; do \
		tmp="$${loc%:#}"; file="$${tmp%:*}"; line="$${tmp##*:}"; \
		[ "$${line}" = "1" ] && \
		  printf "  %-25s - %s\\n" "$${file##*/}" "$${helptext}"; \
	 done

but this neither beautiful nor elegant it likes to be improved.

Kind regards,
Nicolas

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