Gentoo Solution to Nanny Terminal Problem

[Richard Yao]

On 07/05/2012 12:18 PM, Sean wrote:
> 
> On 06/07/2012, at 1:21 AM, Richard Yao wrote:
> 
>> On 07/05/2012 10:58 AM, Sean wrote:
>>>
>>> On 05/07/2012, at 10:02 PM, Richard Yao wrote:
>>>>
>>>> The second is the e-file command, which will query that database for
>>>> whatever follows it. For example, if I want to find out which package
>>>> installs repoman, I can do `e-file repoman`. I can also do `e-file
>>>> /usr/bin/repoman`.
>>>>
>>>> if FreeBSD had an equivalent to this command, this command, then I
>>>> imagine that calls for Ubuntu/Fedora features should cease. Gentoo users
>>>> seem to be happy with e-file.
>>>>
>>>
>>>
>>> 0:55 Fri 06-Jul sean at queen [~] pkg_info -W bash
>>> /usr/local/bin/bash was installed by package bash-4.2.28
>>>
>>> 0:57 Fri 06-Jul sean at queen [~] pkg_info -W /usr/local/sbin/sendmail 
>>> /usr/local/sbin/sendmail was installed by package postfix-2.9.3,1
>>
>> Does that tell you about packages that are not installed?
>>
> 
> No, but that wasn't part of your description. Or if it was, I missed it and go me for publicly putting my foot in my mouth :)
> 
> And if it's going down the path of every package/port there's questions (at least to me...) - is it all possible ports/packages including options (and that's a big 'how?'), or just the defaults? Considering how dynamic ports are with options rather than being broken up into pieces, it gets ugly fast - which port has /usr/local/bin/ndb_config? ok, yes, mysql*-server, but only if WITH_NDB - it's not default. Maybe that should be a mysql*-server-ndb port, but it's not, and it's far from alone there ... PHP was at one time the poster child for compiling everything in via options rather than using modules and I'm very grateful for the maintainers for sorting out that mess as much as they have. But it's also another example of non-default options making notable changes; what if you're looking for the mod_php setup? Searching for mod_php won't work if you just use defaults; it's a non-default option for the php5* package. Same with php-fpm. 
> 
> It's an effective solution for the default packages and certainly works well on that basis, but the current ports aren't always amenable to peeling out the required information in a variety of cases. 
> 
> This is not to say it's a bad idea - it's not, by any means. Quite the reverse really. It's just the boundaries and limits really need to be clear or its diving down a rabbit hole... (shuffle/split the ports to make this easier? Does pkg-ng make it easier to find this sort of information? Punt on it and say caveat emptor?)
> 
> Gentoo's ebuilds can be just as dynamic - how does Gentoo deal with it?

That information is recorded in /var/db/pkg. The cron job reads that on
Gentoo. As for what it will find, it only will find things that has been
installed on end user systems that are running the cron job. If an
option or port is not used, then it will not find it. That has only
happened to me once on Gentoo. Apparently, no one runing the cron job
used mtree and the package had been broken for a while.

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