linux-kernel - Re: [PATCH v2] scripts/setlocalversion: make git describe output more reliable

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Date:   Mon, 21 Sep 2020 11:35:30 +0200
From:   Nico Schottelius <nico-linuxsetlocalversion@...ottelius.org>
To:     Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:     Nico Schottelius <nico-linuxsetlocalversion@...ottelius.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Brian Norris <briannorris@...omium.org>,
        Bhaskar Chowdhury <unixbhaskar@...il.com>,
        Guenter Roeck <linux@...ck-us.net>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] scripts/setlocalversion: make git describe output
 more reliable


Hey Rasmus,

Rasmus Villemoes <linux@...musvillemoes.dk> writes:
>> So I suggest you introduce something on the line of:
>>
>> ...
>> num_chars=12
>> ...
>> --abbrev=$num_chars
>
> I considered that, but it becomes quite ugly since it needs to get into
> the awk script (as a 13, though perhaps we could get awk to do the +1, I
> don't really speak awk), where we'd then need to use " instead of ' and
> then escape the $ that are to be interpreted by awk and not the shell.

No need for that, awk can read (and use) environment variables...

> So I think it's more readable with hardcoding and comments explaining
> why they are there; should anyone ever want to change 12.

... so that in practice you only need to change 13 to var+1 and 12 to $var.

Cheers,

Nico


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