Unable to install flatpakref on Ubuntu artful

The GNOME Software Flatpak plugin is not installed by default.
Does installing the `gnome-software-plugin-flatpak` package fix this for you?

You're right that I didn't have that plugin package installed. I installed it and double clicking the package still presents the same error. Apologies I omitted the screenshot in my initial report.

I installed `gnome-software-plugin-flatpak`.

I had to download the `flatpakref` file, then double click it via the file manager, which caused GNOME Software to spit assorted errors and claims of something going wrong. I was however presented with an Install button which when clicked prompted for a password and then dumped me back at an Install button.

I then searched GNOME Software for 'Pithos' and it found an entry where the source was flathub. I was able to install it by clicking the Install button.

I doubt what I've described is how the installation flatpaks is intended to work. Can someone confirm the intended experience so we can identify what might not be working correctly in Ubuntu?

Status changed to 'Confirmed' because the bug affects multiple users.

I killed gnome-software and tried again, got the same experience Martin did.

Did you restart GNOME Software after installing the plugin? And with that I mean kill it completely, even its background process.

Screenshots showing me trying to install the pithos flatpak.

I did 'sudo killall gnome-software'

I had the same error. So I installed gnome-software-plugin-flatpak and flatpak :

$ sudo add-apt-repository ppa:alexlarsson/flatpak && sudo apt update
$ sudo apt install flatpak

But still had the same error. I rebooted and had the install button (with the other error Martin noticed too on #3). Unfortunately that doesn't worked too. I had an other error (the third...) that I attached. Note the installation work from command line.

Is this still an issue on Ubuntu 18.04 with gnome-software-plugin-flatpak installed?

On Ubuntu 18.04 daily with flatpak 0.11.3, gnome-software-plugin-flatpak 3.28.0 I have not been able to reproduce this issue. I did have a separate issue, which looks like a bug in cleanups between versions of gnome-software as removing all apps, remotes and caches resolved the issue - I have reported this upstream https://gitlab.gnome.org/GNOME/gnome-software/issues/328.

On Ubuntu 17.10, with flatpak 0.8.9 (which I am in the process of SRU'ing - bug 1752381) and gnome-software-plugin-flatpak 3.26.1 I am able to reproduce the issue - "failed to get related refs: using origin io.github.GnomeMpv-origin: Remote "io.github.GnomeMpv-origin" not found".

This appears to be an issue with gnome-software-plugin-flatpak, not flatpak itself - I have spoken to hugsie and kalev upstream and they confirmed this. It was also stated that "flatpakrefs in 3.26.1 are known buggy." and "I'd suggest retesting with 3.28.0 or 3.26.7" - 3.28.0 appears to have resolved the issue, 3.26.7 probably needs a SRU? Therefore I am marking this bug as invalid for flatpak.

Furthermore I have added a test for installing flatpakref's with gnome-software to the test plan for future flatpak releases https://wiki.ubuntu.com/Process/Merges/TestPlan/flatpak once this bug has been resolved.

Could you split the cache upgrade issue into a separate Launchpad bug?

We'll keep using this bug to track the clean install issue that only affects Ubuntu 17.10.

@jbicha, sure reported an issue here to track the potential cache upgrade issue with 3.28 https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1756098

For those wondering: I should've realized this much earlier, the importance being 'Low' is not some sort of anti-Flatpak conspiracy, it's because the bug satisfies the criteria for Low importance as per: https://wiki.ubuntu.com/Bugs/Importance

'Bugs that affect unusual end-user configurations or uncommon hardware
Bugs that affect a non-essential aspect and limited scope of the application
Non-ideal default configuration'

Though I think there's a case to make this higher importance:

'A bug that has a moderate impact on a core application' (Medium)
'Has a severe impact on a small portion of Ubuntu users (estimated)' (High)
'Renders essential features or functionality of the application or dependencies broken or ineffective' (High) - some would consider installing Flatpaks from their software center an 'essential feature', even if Flatpak and the plugin in question are in universe not main. (High)

Ok, I'll give you medium. Enjoy!

This bug seems to have been re-introduced in Ubuntu 18.04 (GNOME Software 3.28.1-0ubuntu4), should I file a new bug or re-open this one?

@Ad20000, Are you using flatpak version 0.11.4 or 0.11.5 from the PPA ? There was a regression which I found and reported here https://github.com/flatpak/flatpak/issues/1632 where flatpakref's could crash gnome-software. It has since been fixed and released in 0.11.6.

I'm using 0.11.3-3 from the repositories, does 0.11.6 need to be SRU'd? Since this is a new upstream microrelease that should be acceptable, if someone wants to follow the process for making that happen: https://wiki.ubuntu.com/StableReleaseUpdates#Procedure

@Ads20000, Yup I'm preparing an SRU for the next microrelease, you can track in bug 1767215. I am able to use flatpakref's with 0.11.3-3, if you are still having an issue please report upstream :-) (I have also seen issues discussed as different browsers acting differently, or the browser associating mime types itself - causing issues, wonder if that is the case here).

Strange, installing Flatpaks seems to work fine in 0.11.3-3 now (with gnome-software 3.28.1-0ubuntu4.18.04.1 (the new version is a patch for snaps from bionic-proposed, nothing to do with Flatpak I don't think)). Glad that an Ubuntu dev is on it with keeping Flatpak up to date! :D