[gentoo-portage-dev] Question about PDEPEND

[gentoo-portage-dev] Question about PDEPEND

[Pacho Ramos]

Hello

During today's review session with Petteri (due bug #284528) PDEPEND
question appeared about what really does it. I replied that it contains
dependencies that need to be installed after the package (as is shown in
http://devmanual.gentoo.org/general-concepts/dependencies/index.html )
but he told me that PDEPEND is really the same as RDEPEND with cycle
breaking. He also suggested me to ask portage devs about what it really
doing PDEPEND.

Now, after the session, I rechecked devmanual page and noticed that
"after" is in cursive (sorry for didn't noticing it before), also
googled a bit and found posts like:
http://blog.flameeyes.eu/2008/10/18/blurring-the-separation-between-rdepend-and-pdepend
http://help.lockergnome.com/linux/gentoo-dev-PDEPEND-behaviour--ftopict483842.html

that clearly show PDEPEND is not simply "merge depends after the
package".

Then, if possible, I would highly appreciate a summary about what really
does PDEPEND. Of course, as I know portage devs are overloaded, if you
don't have time to reply, no problem at all :-)

Thanks a lot

Re: [gentoo-portage-dev] Question about PDEPEND

[Zac Medico]

Pacho Ramos wrote:
> but he told me that PDEPEND is really the same as RDEPEND with cycle
> breaking.

This is good description. It's handled the same as RDEPEND except
when it can't due to circular dependencies. That means that it's
installed before, just like RDEPEND, except when resolution of
circular dependencies requires it to be installed after.
-- 
Thanks,
Zac

Re: [gentoo-portage-dev] Question about PDEPEND

[Pacho Ramos]

El mar, 08-12-2009 a las 11:31 -0800, Zac Medico escribió:
> Pacho Ramos wrote:
> > but he told me that PDEPEND is really the same as RDEPEND with cycle
> > breaking.
> 
> This is good description. It's handled the same as RDEPEND except
> when it can't due to circular dependencies. That means that it's
> installed before, just like RDEPEND, except when resolution of
> circular dependencies requires it to be installed after.

Fine, thanks a lot =)

[gentoo-portage-dev] Re: Question about PDEPEND

[Duncan]

Zac Medico posted on Tue, 08 Dec 2009 11:31:12 -0800 as excerpted:

> Pacho Ramos wrote:
>> but he told me that PDEPEND is really the same as RDEPEND with cycle
>> breaking.
> 
> This is good description. It's handled the same as RDEPEND except when
> it can't due to circular dependencies. That means that it's installed
> before, just like RDEPEND, except when resolution of circular
> dependencies requires it to be installed after.

Thanks.  That had confused me too, and Petteri and your definition neatly 
breaks the confusion dependency cycle. =:^)

-- 
Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master."  Richard Stallman