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| Flatpak is a solution for creating sandboxed software builds for GNU/Linux systems. You can find more information [http://flatpak.org/ here].
| | The development information of this page has been moved [https://develop.kde.org/docs/build/flatpak/ here]. |
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| = KDE Runtime =
| | The usage information of this page has been moved [https://userbase.kde.org/Tutorials/Flatpak here]. |
| KDE Software approach to Flatpak is still not ready. Nevertheless, it's being shaped up. If you're interested in helping, please send an e-mail to [mailto:[email protected] [email protected]]. | |
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| The idea behind flatpak is that your applications will depend on a runtime. KDE provides a runtime with Qt and all KDE Frameworks 5 (except for the 4th tier) to make sure it's easily adaptable for any KDE Application and possibly most Qt-based applications as well. | |
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| This runtime can be added by following these instructions:
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| <syntaxhighlight lang="bash">
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| flatpak remote-add kde --from https://distribute.kde.org/kderuntime.flatpakrepo
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| flatpak install kde org.kde.Platform
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| flatpak install kde org.kde.Sdk
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| </syntaxhighlight>
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| {{ Warning | Do NOT use this in production, it's work in progress and it doesn't enable important safety features. It might also eat your pet or first-born.}}
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| = Test an application =
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| <syntaxhighlight lang="bash">
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| flatpak remote-add kdeapps --from https://distribute.kde.org/kdeapps.flatpakrepo
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| flatpak install kdeapps org.kde.okular
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| </syntaxhighlight>
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| {{ Warning | Do NOT use this in production, it's work in progress and it doesn't enable important safety features. It might also eat your pet or first-born.}}
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| = Compile your application =
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| Now you get to compile your favorite application. If you want to see how it's done, you can see some of the ones that have already been built. You can find it [https://cgit.kde.org/flatpak-kde-applications.git/tree/ here].
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| To compile an applications, you should create a json file similar to the ones in the previous link. Then you'd just need to trigger the build and get it into a repository. For testing, I recommend just creating a local one (to publish an rsync will be required).
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| <syntaxhighlight lang="bash">
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| mkdir app repo
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| flatpak-builder --ccache --repo=repo --subject="Build of AWESOMEAPP `date`" app org.kde.AWESOMEAPP.json
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| </syntaxhighlight>
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| This will do everything required and create a repository in ./repo. To test the application we add the repository (called remotes), we install the application and then we run it:
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| <syntaxhighlight lang="bash">
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| flatpak remote-add awesomeapp repo --no-gpg-verify
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| flatpak install awesomeapp org.kde.AWESOMEAPP
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| flatpak run org.kde.AWESOMEAPP
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| </syntaxhighlight>
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| Now you will see that some things don't work and you'll have the privilege to start fixing things!
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| {{ Note | All flatpak commands (such as <code>remote-add</code> and <code>install</code>) accept a <code>--user</code> option to install things at the user level, without being prompted for the sudo password every time. }}
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| = Contribute! =
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| In the following repositories you'll find the code in charge of packaging the runtime (Qt 5 and KF5) and then several (but not all, yet) KDE Applications.
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| * Runtime: https://cgit.kde.org/flatpak-kde-runtime.git/
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| * Applications: https://cgit.kde.org/flatpak-kde-applications.git/
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| = Flatpak portals =
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| Portals are high-level session bus APIs that provide selective access to resources to sandboxed applications. The implicit expectation of portals is that the user will always be involved in granting or rejecting a portal request, thus most portal APIs will lead to user interaction in the form of dialogs.
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| Since such dialogs must fit into the user experience of the desktop shell, the portal APIs are implemented by a generic frontend called [https://github.com/flatpak/xdg-desktop-portal xdg-desktop-portal] which calls out to desktop-specific implementations that provide the actual UI. The bus name through which the portal APIs are available is org.freedesktop.portal.Desktop, with the object path /org/freedesktop/portal/desktop implementing the various portal interfaces.
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| {{ Note | You can find more information about flatpak portals [https://github.com/flatpak/flatpak/wiki/Portals here]. }}
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| == KDE implementation of portals ==
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| Currently there is some basic implementation of FileChooser, AppChooser and Notifications portal, which you can find here under [https://github.com/grulja/xdg-desktop-portal-kde xdg-desktop-portal-kde]. To force Qt applications, which are running in sandbox, call flatpak portal frontend instead of e.g. displaying a file dialog we implemented a [https://github.com/grulja/flatpak-platform-plugin platform plugin]. This plugin basically just replaces file dialog and openURI with DBus calls. If you want to test KDE flatpak portals, you can use this [https://github.com/grulja/flatpak-portal-test-kde simple test app].
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The development information of this page has been moved here.
The usage information of this page has been moved here.
