[gentoo-user] Re: q-reinitialize script in portage-utils-0.10

[Nikos Chantziaras]

On 06/06/12 22:45, Mick wrote:
> On Wednesday 06 Jun 2012 20:30:19 Nikos Chantziaras wrote:
>> On 06/06/12 21:30, Mick wrote:
>>> Latest stable portage told me this:
>>>    * Messages for package app-portage/portage-utils-0.10:
>>>
>>>    * /etc/portage/postsync.d/q-reinitialize has been installed for
>>>    convenience * If you wish for it to be automatically run at the end of
>>>    every --sync: *    # chmod +x /etc/portage/postsync.d/q-reinitialize
>>>    * Normally this should only take a few seconds to run but file systems
>>>    * such as ext3 can take a lot longer.  To disable, simply do:
>>>    *    # chmod -x /etc/portage/postsync.d/q-reinitialize
>>>
>>> but it did not tell me *why* and I don't understand what "Reinitialize
>>> ebuild cache" mean.
>>>
>>> In case this makes any odds, I am using eix.  Do I need the above script?
>>
>> The q tool has it's own database. q-reinitialize updates it. It takes
>> 0.1 seconds to complete, so you can just activate it and forget about
>> it. You can also execute it manually to see how fast it is.
>
> Thanks Nikos, is this a database to be used by the q tools, or for some other
> purpose?

It's used only by q.


> I am trying to understand if I will be duplicating what eix does.

It's not the same as eix.  It's a bit similar to equery, except it's 
blindingly fast.  Compare for example the speed of:

   equery belong /bin/bash

vs:

   qfile /bin/bash

q is orders of magnitude faster.  I have both though, since some things 
can be done with the one but not with the other.