Gentoo Archives: gentoo-dev

From: Brian Harring <ferringb@×××××.com>
To: gentoo-dev@l.g.o
Subject: Re: [gentoo-dev] New PDEPEND behaviour.
Date: Wed, 25 Jul 2007 12:36:20
Message-Id: 20070725123248.GA17517@seldon
In Reply to: [gentoo-dev] New PDEPEND behaviour. by "Piotr Jaroszyński"
1 On Wed, Jul 25, 2007 at 02:08:39PM +0200, Piotr Jaroszy??ski wrote:
2 > Hello,
3 >
4 > As a result of bug #180045 PDEPENDs can be now merged even before the package
5 > that pulls them. Zmedico says that's intended behaviour and PDEPEND is really
6 > a RDEPEND, but with a ability to resolve circular deps:
7 > circular DEPEND <-> RDEPEND can't be resolved while circular DEPEND <->
8 > PDEPEND can.
9 > Random behaviour occurs when there is a circular RDEPEND <-> PDEPEND, e.g. bug
10 > #186517.
11 >
12 > We need to update docs or harass zmedico to force PDEPEND to be pulled as soon
13 > as possible but not before the pkg that pulls it.
15 PDEPEND (just like RDEPEND), can, and always has been *able* to be
16 satisfied prior to the node that requires it- the name may suck, but
17 it's better then BREAK_RDEPEND_CYCLES, thus PDEPEND; it's never been
18 viewed as a literal "it must be post" however. Semi curious when the
19 ebuild manpage picked up that description also- would expect its just
20 a bad choice of words.
22 If in doubt, suggest you do some experiments with earlier portage
23 versions, explicitly trying to force a node that is PDEPEND'd upon to
24 come prior- ought to occur fine. Basically, you're arguing based upon
25 *most* PDEPEND'd nodes dep'ing on the original PDEPENDer (a cycle,
26 thus with PDEPEND breaking it, the PDEPEND target coming first due to
27 resolution rules) - not on rules of PDEPEND.
29 Either way, proposing that PDEPEND (a cycle breaking RDEPEND), be
30 literal post is likely going trigger some fun fallout with the
31 existing consumers of it. Suggest you investigate those before
32 pushing this idea further.
34 On the offchance there isn't nasty fallout from your proposal, still
35 view it as -1 for the change.
37 ~harring