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Precompiled binaries
-----------------
See [the wiki](https://gitlab.com/Remmina/Remmina/wikis/home#for-users-with-a-distro-that-supports-flatpak-including-ubuntu) for instructions. The recipe here is always pointed to the `master` branch. The recipe in [the flathub repository](https://github.com/flathub/org.remmina.Remmina/blob/master/org.remmina.Remmina.json) is pointed to the latest tagged release. Files except the JSON file in this directory is used for automatic builds.
Build instructions
------------------
0. Update fluthub shared modules
From time to time update the shared-modules provided by flathub
```shell
git submodule update --remote --merge
```
1. Install `flatpak` and `flatpak-builder` ([instructions]). Remmina
Flatpak manifest recommends the latest version of `flatpak-builder`.
[instructions]: http://flatpak.org/getting.html
2. Enable the Flatpak repository maintained by Flathub:
```shell
flatpak --user remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
```
3. Build Remmina:
```shell
git submodule init -- shared-modules/
git submodule update -- shared-modules/
flatpak-builder --user --sandbox --install-deps-from=flathub --repo=repo/ appdir/ org.remmina.Remmina.json
```
Remmina will be built in `appdir/` folder and the result will be exported
to a local Flatpak repository in `repo/` folder.
4. Enable the local repository:
```shell
flatpak --user remote-add --no-gpg-verify --if-not-exists my-repo repo/
```
5. Install Remmina from your repository:
```shell
flatpak --user install my-repo org.remmina.Remmina
```
6. Launch Remmina
```shell
flatpak run org.remmina.Remmina
```
Limitations
-----------
Several Remmina features are not enabled in Flatpak build:
* SPICE USB redirection uses a small suid wrapper
(`spice-client-glib-usb-acl-helper`) which is inhibited by Flatpak
`bubblewrap` sandboxing. Therefore, this feature is not enabled.
* Telepathy DBus activation would require some more files exported outside of
Flatpak. Hence, Telepathy plugin is not compiled.
* File transfers of some plugins (SFTP, SPICE drag and drop...) are limited to
the files located in the user home directory (see below).
Security considerations
-----------------------
* Remmina's Flatpak sandbox is configured to give access to the user home
directory. You can share more folders or remove them by using the command
`flatpak override --[no]filesystem=<folder>`.
* Because Xephyr version `1.17.0` and later don't work fine with `GtkSocket`
(see downstream and upstream bugs), Remmina's Flatpak bundles an out of date
version of Xephyr (`1.16.4`) for the XDMCP plugin.
- https://gitlab.com/Remmina/Remmina/issues/366
- https://bugs.freedesktop.org/show_bug.cgi?id=91700
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