Bug 275898

Summary:	sys-apps/portage: emerge -N should not upgrade if possible
Product:	Portage Development	Reporter:	Sebastian Luther (few) <SebastianLuther>
Component:	Core	Assignee:	Portage team <dev-portage>
Status:	CONFIRMED ---
Severity:	normal	CC:	esigra, gentoo-bugs
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Bug Depends on:
Bug Blocks:	155723

Description Sebastian Luther (few) 2009-06-30 07:52:12 UTC

deps:
A: || ( A-1 A-2 )
B: B-1
B-1: u? ( C )
@randomset: A B

status:
installed are A-1, B-1[-u]

USE="u" emerge -N @randomset

actual result:
	A-2, B-1[u], C get installed
expected result:
	A-1 is left as it is, B-1[u], C get installed

solution: prefer installed packages over highest visible for -N (and not -u)
new problem:

deps:
A: || ( A-1 A-2 )
B: B-1
B-1: u? ( A-2 )
@randomset: A B

status:
installed are A-1, B-1[-u]

USE="u" emerge -N @randomset

2 possible outcomes:

1) B is handled first:
leads to B-1[u] and A-2 installed

2) A is handled first
leads to A-1 and A-2 pulled into the graph, since A selects the installed A-1 and B-1[u] selects A-2.

solution:
Don't pull installed packages into the graph, but process their deps.

Is this possible with the current implementation? If not, it's bug 1343.

Comment 1 Sebastian Luther (few) 2009-06-30 12:33:57 UTC

Everyone interested in this should have a look at bug 275945.

Comment 2 Brian Dolbec (RETIRED) gentoo-dev

2015-03-04 22:20:49 UTC

Sebastian, what's the status of this bug.  Is it still relevant with all the subslot and EAPI changes?