linux-kernel - Re: [PATCH] kconfig: merge_config: avoid false positive matches from comment lines

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Date:   Fri, 2 Nov 2018 23:44:51 +0100
From:   Petr Vorel <petr.vorel@...il.com>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     linux-kbuild@...r.kernel.org, Nasser <afshin.nasser@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kconfig: merge_config: avoid false positive matches from
 comment lines

Hi Masahiro,

> The current SED_CONFIG_EXP could match to comment lines in config
> fragment files, especially when CONFIG_PREFIX_ is empty. For example,
> Buildroot uses empty prefixing; starting symbols with BR2_ is just
> convention.

> Make the sed expression more robust against false positives from
> comment lines. The new sed expression matches to config options
> followed by '=' or ' is not set'.

> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> ---
Reviewed-by: Petr Vorel <petr.vorel@...il.com>

> -SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)[= ].*/\2/p"
> +SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)\(=.*\| is not set$\)/\2/p"

Good idea, thanks!


Kind regards,
Petr