Un-revert a snap

[Didier Roche]

Le 27/10/2016 à 09:18, YC Cheng a écrit :
> I found the following command works:
>
> snap revert --revision 29
>
> as expected.

Indeed,
you will notice though that any new data which have been produced after
the revert by revision 20 will not be available to the new revision 29,
which may not be the expected outcome.
(So, the 2 commands are not equivalent)


>
> We still need a command to list all revision of a snap install in the
> system (we can get that from 'df', but still better to get all info
> from a command) ?
+1, as we had "snappy list -v" in 15.04.

Didier
>
> YC
>
> 2016-10-27 14:38 GMT+08:00 Didier Roche <didrocks at ubuntu.com
> <mailto:didrocks at ubuntu.com>>:
>
>     Le 27/10/2016 à 08:32, YC Cheng a écrit :
>>     I think we need a way to just Un-revert from rev 20 to rev 29
>>     without remove rev 29.
>>
>>     Shall we fire a bug for that if we don't have such method exists
>>     now ?
>
>     I think it's not that easy considering the associated data. You
>     need to swap them to restart from the latest version of data from
>     rev 20 to copy to 29. Explicitely removing that version makes
>     sense in that context. Have an unrevert command won't convey that
>     notion.
>
>     Didier
>
>>
>>
>>     2016-10-27 14:13 GMT+08:00 Didier Roche <didrocks at ubuntu.com
>>     <mailto:didrocks at ubuntu.com>>:
>>
>>         Le 27/10/2016 à 03:01, Marcos Alano a écrit :
>>         > Hello guys,
>>
>>         Hey Marcos,
>>         >
>>         >
>>         > Sorry if I'm in the wrong mailing list. That's the only one
>>         about snap i
>>         > could found. The question is: how I revert-revert
>>         (un-revert) a snap? I
>>         > can install a snap:
>>         >
>>         > (sudo snap install hello) after thatr I can upgrade a snap
>>         (snap refresh
>>         > hello --channel=beta hello) and finally revert (sudo snap
>>         revert hello).
>>         > But after that if I try to re-upgrade I just can't:
>>         >
>>         > $ sudo snap refresh --beta hello
>>         >
>>         > error: cannot refresh "hello": snap "hello" has no updates
>>         available
>>         >
>>         > I'm doing something wrong?
>>
>>         You are not doing it wrong :) The revert command "blacklists"
>>         this
>>         particular snap revisions on purpose, so that you don't
>>         reupdate to it.
>>         However, there is a way to get back to it! You can remove
>>         explicitely
>>         that revision (without removing the current snap). Data
>>         associated to
>>         the reverted revision will be cleaned up as well.
>>         Then, you can refresh.
>>
>>         In a concrete example with the hello snap:
>>         20 is the revision in the stable channel, 29 corresponds to
>>         the revision
>>         in the beta channel.
>>
>>         # Install and update
>>         $ snap install hello
>>         $ snap list hello
>>         Name   Version  Rev  Developer  Notes
>>         hello         2.10     20   canonical  -
>>         $ snap refresh hello --beta
>>         $ snap list hello
>>         Name   Version  Rev  Developer  Notes
>>         hello         2.10.1   29   canonical  -
>>
>>         # Revert
>>         $ snap revert hello
>>         $ snap list hello
>>         Name   Version  Rev  Developer  Notes
>>         hello         2.10     20   canonical  -
>>
>>         # Remove reverted version (and associated data)
>>         $ snap remove hello --revision=29
>>         hello removed
>>         $ snap list hello
>>         Name   Version  Rev  Developer  Notes
>>         hello         2.10     20   canonical  -
>>
>>         # Reupdate
>>         $ snap refresh hello --beta
>>         $ snap list hello
>>         Name   Version  Rev  Developer  Notes
>>         hello         2.10.1   29   canonical  -
>>
>>         I hope that answer your questions :)
>>         Cheers,
>>         Didier
>>
>>
>>         --
>>         Snapcraft mailing list
>>         Snapcraft at lists.snapcraft.io
>>         <mailto:Snapcraft at lists.snapcraft.io>
>>         Modify settings or unsubscribe at:
>>         https://lists.ubuntu.com/mailman/listinfo/snapcraft
>>         <https://lists.ubuntu.com/mailman/listinfo/snapcraft>
>>
>>
>>
>>
>
>
>     --
>     Snapcraft mailing list
>     Snapcraft at lists.snapcraft.io <mailto:Snapcraft at lists.snapcraft.io>
>     Modify settings or unsubscribe at:
>     https://lists.ubuntu.com/mailman/listinfo/snapcraft
>     <https://lists.ubuntu.com/mailman/listinfo/snapcraft>
>
>
>
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/snapcraft/attachments/20161027/14330d9a/attachment.html>