Bug 646622

Summary:	sys-apps/portage: add egencache option to generate QA report for changed dependencies
Product:	Portage Development	Reporter:	Zac Medico <zmedico>
Component:	Tools	Assignee:	Portage team <dev-portage>
Status:	CONFIRMED ---
Severity:	normal	CC:	josef64, sam, tsmksubc
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	All
See Also:	https://bugs.gentoo.org/show_bug.cgi?id=645550 https://bugs.gentoo.org/show_bug.cgi?id=646458 https://bugs.gentoo.org/show_bug.cgi?id=873781
Whiteboard:
Package list:		Runtime testing required:	---

Description Zac Medico gentoo-dev

2018-02-05 01:13:48 UTC

When egencache is generating metadata, is it already compares the previous cache entry to the new one. So, it has a perfect opportunity to generate a QA report for changed dependencies. The report might simply consist of raw dependency metadata which is intended for analysis by other tools.

Classes of dependency changes that cause problems are enumerated here:

https://wiki.gentoo.org/wiki/Project:Portage/Changed_Deps

Comment 1 Zac Medico gentoo-dev

2018-02-05 03:26:33 UTC

This could also be implemented as a tool that creates and compares dumps of the metadata cache. The advantage of separating this from egencache is that the tool can run on a separate machine from egencache, operating on snapshots of the rsync tree.

It might also be useful to blame specific commits, but that would be much more expensive because it involves generating metadata cache separately for each commit in which a dependency change may have occurred (could use git bisect).

Comment 2 Zac Medico gentoo-dev

2018-02-06 08:59:24 UTC

The gentoo-repo-qa-bot commits are a convenient data source:

https://github.com/gentoo-mirror/gentoo/commits?author=gentoo-repo-qa-bot