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Bug 791856 - sys-apps/portage: package moves not applied with FEATURS=binpkg-multi-instance when any package instance for the same CPV already exists: Cannot update binary: Destination exists
Summary: sys-apps/portage: package moves not applied with FEATURS=binpkg-multi-instanc...
Status: CONFIRMED
Alias: None
Product: Portage Development
Classification: Unclassified
Component: Binary packages support (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Portage team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2021-05-24 16:58 UTC by William Throwe
Modified: 2021-05-24 17:41 UTC (History)
0 users

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Runtime testing required: ---

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Description William Throwe 2021-05-24 16:58:28 UTC 
After every --sync I get the error

!!! Cannot update binary: Destination exists.
!!! app-emacs/emacs-common-gentoo-1.6-r3 -> app-emacs/emacs-common-1.6-r3

Looking at these packages, I have

/var/cache/packages/app-emacs/emacs-common:
emacs-common-1.6-1.xpak     emacs-common-1.6-r3-1.xpak  emacs-common-1.8-1.xpak
emacs-common-1.6-r1-1.xpak  emacs-common-1.6-r4-1.xpak

/var/cache/packages/app-emacs/emacs-common-gentoo:
emacs-common-gentoo-1.6-r3-2.xpak


It looks like (from this and from looking at the source) portage is using the CPV string to identify packages to move, but with FEATURES="binpkg-multi-instance" multiple packages can share the same CPV.
Comment 1 Zac Medico gentoo-dev 2021-05-24 17:36:06 UTC 
It's questionable whether you'd even want to bother to apply these updates, since the packages can be older that what you currently have installed.
Comment 2 Zac Medico gentoo-dev 2021-05-24 17:41:08 UTC 
It's not desirable that it skips application of the update and then it will not try to apply it again until the corresponding file timestamp in profiles/updates changes again.