Bug 602964

Summary:	Improve output when visibility prevents subslot-triggered rebuilds
Product:	Portage Development	Reporter:	Andreas K. Hüttel <dilfridge>
Component:	Core	Assignee:	Portage team <dev-portage>
Status:	RESOLVED FIXED
Severity:	normal	CC:	esigra, josef64, redwolfe
Priority:	Normal	Keywords:	InVCS
Version:	unspecified
Hardware:	All
OS:	Linux
See Also:	https://bugs.gentoo.org/show_bug.cgi?id=452732
Whiteboard:
Package list:		Runtime testing required:	---
Bug Depends on:
Bug Blocks:	155723, 611328

Description Andreas K. Hüttel archtester

2016-12-17 21:37:04 UTC

I've recently had lots of trouble getting my system to update cleanly. With --ignore-built-slot-operator-deps=yes everything worked fine, without both boost and parts of Qt got tangled into a mess of conflicting up- and downgrade suggestions. 

After a lot of try-and-error I found the reason. I had a package installed where
* the installed version had been removed from the tree
* all other (newer) versions were locally package.masked
* and a rebuild was due

It would be nice if such a situation were expressed more clearly in the output. 

Now I only found it because this was one of the packages trying to trigger a Qt downgrade, and I checked them all in turn...

[Interestingly in both cases with and without --ignore-built-slot-operator-deps=yes autounmask did not suggest anything about the package. Only when I tried to rebuild it manually by listing it on the command line...]

Comment 1 Zac Medico gentoo-dev

2016-12-18 10:35:19 UTC

It shouldn't be too difficult to identify and highlight these packages in the slot conflict output. That will be a vast improvement over the current situation.

Comment 2 Zac Medico gentoo-dev

2016-12-18 14:06:39 UTC

I've posted this patch for review:

https://archives.gentoo.org/gentoo-portage-dev/message/553e19a6126d6989453d9ac359650809
https://github.com/gentoo/portage/pull/77

Comment 3 Zac Medico gentoo-dev

2016-12-19 05:20:20 UTC

This is in the master branch:

https://gitweb.gentoo.org/proj/portage.git/commit/?id=ddbe020d9385f8b70e4ec6f085d3afa7271949d7

Comment 4 Zac Medico gentoo-dev

2017-01-04 22:21:22 UTC

We could extend this to include information about other issues found in the depgraph _slot_operator_trigger_reinstalls and _slot_operator_update_probe methods. For example:

* _slot_operator_trigger_reinstalls will not call _slot_operator_update_probe if the package depth is greater than the current --deep setting

* _slot_operator_update_probe will not trigger a rebuild if it can't find an available package that satisfies the check_reverse_dependencies function

Comment 5 Zac Medico gentoo-dev

2017-02-13 17:28:40 UTC

*** Bug 607244 has been marked as a duplicate of this bug. ***

Comment 6 Zac Medico gentoo-dev

2017-05-20 18:09:03 UTC

Fixed in portage-2.3.5.