How about an option to disbale headers? (was Re: Patch for "doveadm -f table" nit)

[Steffen Kaiser]

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On Thu, 19 Mar 2015, Gedalya wrote:
> On 03/18/2015 08:49 PM, Timo Sirainen wrote:
>> There's no reason why flow and pager should write headers to stderr because 
>> it would always result only in a mess. But instead of changing table 
>> headers to write to stdout, I think a better fix would be to make tab 
>> formatter write headers to stderr. Including headers in stdout makes it 
>> more difficult to write scripts that access the actual data. For example 
>> now you can do "doveadm who -1 | sort" and the output will work. If headers 
>> were written to stdout you'd have to make it more complicated. Also you can 
>> now easily specify what you want to do with the headers, 2>/dev/null if you 
>> don't care about them or 2>&1 if you want to include them in stdout (which 
>> works even after |sort).

doveadm .... 2> /dev/null
will suppress headers _and_ error messages

>> So, I'll add in my v2.3 TODO that tab formatter should write to stderr..
>
> I've been using "-f flow fetch text | sed s/^text=//" when training 
> spamassasin. Couldn't find a straightforward 'fetch raw message'. Seems 
> unnecessarily awkward. Moving headers to stderr would help this, though.
>

How about a formatter option to enable/disable headers at all? Like,

who -H
ps h
ps --headers

Most probably it useful for scripts only, so add an option to suppress all
headers will fit most case.

- -- 
Steffen Kaiser
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