Create a Flatpak package for my Qt app

odelaune

Hello, I try to create a Flatpak package for my application

Here is what I did so far

flatpak remote-add --user --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
flatpak install --user org.kde.Sdk
(select 5.15-21.08 as runtime version)
mkdir app repo
touch org.flatpak.myapp

here is the content of org.flatpak.myapp

{
    "app-id": "org.flatpak.myApp",
    "runtime": "org.kde.Platform",
    "runtime-version": "5.15-21.08",
    "sdk": "org.kde.Sdk",
    "command": "myApp",
    "finish-args": [
        "--share=ipc",
        "--socket=x11",
        "--socket=wayland",
        "--filesystem=host",
        "--device=dri"
    ],
    "modules": [
        {
            "name": "myApp",
            "buildsystem": "cmake-ninja",
            "config-opts": ["-DCMAKE_BUILD_TYPE=RelWithDebInfo"],
            "sources": [
                {
                    "type": "dir",
                    "path": "../"
                }
            ]
        }
    ]
}

then I try to create the Flatpak using

flatpak-builder --user --ccache --repo=repo --subject="Build of MyApp software `date`" --force-clean app org.flatpak.myapp

But I get a basic error:

Emptying app dir 'app'
Downloading sources
Starting build of org.flatpak.myapp
Cache miss, checking out last cache hit
========================================================================
Building module myapp in $HOME/myapp/flatpak/.flatpak-builder/build/myapp-1
========================================================================
-- The CXX compiler identification is GNU 11.3.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /run/ccache/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
CMake Error at /usr/lib/x86_64-linux-gnu/cmake/Qt5/Qt5Config.cmake:28 (find_package):
  Could not find a package configuration file provided by
  "Qt5WebEngineWidgets" with any of the following names:

    Qt5WebEngineWidgetsConfig.cmake
    qt5webenginewidgets-config.cmake

  Add the installation prefix of "Qt5WebEngineWidgets" to CMAKE_PREFIX_PATH
  or set "Qt5WebEngineWidgets_DIR" to a directory containing one of the above
  files.  If "Qt5WebEngineWidgets" provides a separate development package or
  SDK, be sure it has been installed.
Call Stack (most recent call first):
  src/CMakeLists.txt:14 (find_package)


-- Configuring incomplete, errors occurred!
See also "/run/build/myapp/CMakeFiles/CMakeOutput.log".
Error: module myapp: Le processus fils s’est terminé avec le code 1

Note that cmake has no problem to find Qt5WebEngineWidgets when I cmake/compile myapp in the classical way (withtout Flatpak).

Do you know how to solve that?

odelaune

OK, it seems that QtWebEngine is not part of KDE Flatpak SDK. So, here is what I did

flatpak install --user flathub io.qt.qtwebengine.BaseApp//5.15-21.08

and I added two lines in the manifest org.flatpak.myapp ("base" and "base-version"):

{
    "app-id": "org.flatpak.myapp",
    "runtime": "org.kde.Platform",
    "runtime-version": "5.15-21.08",
    "sdk": "org.kde.Sdk",
    "base": "io.qt.qtwebengine.BaseApp",
    "base-version": "5.15-21.08",
    "command": "myapp",
    "finish-args": [
        "--share=ipc",
        "--socket=x11",
        "--socket=wayland",
        "--filesystem=host",
        "--device=dri"
    ],
    "modules": [
        {
            "name": "myapp",
            "buildsystem": "cmake-ninja",
            "config-opts": ["-DCMAKE_BUILD_TYPE=RelWithDebInfo"],
            "sources": [
                {
                    "type": "dir",
                    "path": "../"
                }
            ]
        }
    ]
}