linux-kernel - Re: [RFC][PATCH 5/9] perf trace: Add Perl scripting support

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Date:	Tue, 6 Oct 2009 15:00:59 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Tom Zanussi <tzanussi@...il.com>
Cc:	linux-kernel@...r.kernel.org, fweisbec@...il.com,
	rostedt@...dmis.org, lizf@...fujitsu.com, hch@...radead.org
Subject: Re: [RFC][PATCH 5/9] perf trace: Add Perl scripting support


* Tom Zanussi <tzanussi@...il.com> wrote:

>  	OPT_BOOLEAN('v', "verbose", &verbose,
>  		    "be more verbose (show symbol address, etc)"),
> +	OPT_BOOLEAN('p', "perl", &do_perl,
> +		    "send output to a Perl script"),
>  	OPT_STRING('s', "script", &script_name, "file",
>  		    "script file name"),

I dont think we want to use up primary option letters one per language. 
If Perl takes 'p' then what will Python use, 'P'? How about PHP, PEARL 
and PostScript then? ;-)

I think it's better to make the language specification part of the 
-s/--script option, via two methods:

Explicit:

  -s Perl::my_script.pl
  -s pl::my_script.pl
  -s Python::my_script.py
  -s Bash::my_script.sh

Implicit, based on the script extension:

  -s my_script.pl       # maps to the Perl generator
  -s my_script.py       # maps to the Python generator
  -s my_script.sh       # maps to the Bash generator

I think we also want to have a 'perf -s *' kind of thing to get a list 
of all available language modules.

	Ingo
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