linux-kernel - Re: [PATCH] perf tools: Speed up the perf build time by simplifying the perf --version string generation

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Message-ID: <20121030094852.GA21705@gmail.com>
Date:	Tue, 30 Oct 2012 10:48:52 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...radead.org>
Cc:	linux-kernel@...r.kernel.org, Andrew Vagin <avagin@...nvz.org>,
	Borislav Petkov <bp@...64.org>,
	David Howells <dhowells@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Stephane Eranian <eranian@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH] perf tools: Speed up the perf build time by simplifying
 the perf --version string generation


* Ingo Molnar <mingo@...nel.org> wrote:

> Does -l work?
> 
> Alternatively, please replace:
> 
>   git tag --list "v[0-9].[0-9]*" | tail -1
> 
> with:
> 
>   git tag | tail -1 | grep -E "v[0-9].[0-9]*"
> 
> which is just as fast.

make that:

    git tag 2>/dev/null | tail -1 | grep -E "v[0-9].[0-9]*"

this will work silently even if Git is not installed.

Thanks,

	Ingo
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