Flatpak support

[cfergeau]

I did some work to create a flatpak from the .deb package. I followed these instructions https://v2.tauri.app/distribute/flatpak/
The .yml file below generates a flatpak I can install and run, but it get permission denials when trying to access USB devices. I haven't been able to investigate/fix that yet.

$ cat dev.zmk.studio.yml 
id: dev.zmk.Studio

runtime: org.gnome.Platform
runtime-version: '46'
sdk: org.gnome.Sdk

command: app
finish-args:
  - --socket=wayland # Permission needed to show the window
  - --socket=fallback-x11 # Permission needed to show the window
  - --device=all # need access to serial devices (keyboard)
  - --allow=bluetooth
  - --share=ipc

modules:
  - name: binary
    buildsystem: simple
    sources:
      - type: file
        url: https://github.com/zmkfirmware/zmk-studio/releases/download/v0.2.3/zmk-studio_0.2.3_amd64.deb
        sha256: f96f69fdca822359e52b804af8523cc2c9674ec74ee0e2d2a9b45ea9bfc62e05
        only-arches: [x86_64] #This source is only used on x86_64 Computers
    build-commands:
      - ar -x *.deb
      - tar -xf data.tar.gz
      - 'install -Dm755 usr/bin/app /app/bin/app'
      - install -Dm644 usr/share/applications/app.desktop /app/share/applications/dev.zmk.Studio.desktop
      - sed -i 's/Icon=app/Icon=dev.zmk.Studio/' /app/share/applications/dev.zmk.Studio.desktop
      - install -Dm644 usr/share/icons/hicolor/128x128/apps/app.png /app/share/icons/hicolor/128x128/apps/dev.zmk.Studio.png
      - install -Dm644 usr/share/icons/hicolor/32x32/apps/app.png /app/share/icons/hicolor/32x32/apps/dev.zmk.Studio.png
      - install -Dm644 usr/share/icons/hicolor/256x256@2/apps/app.png /app/share/icons/hicolor/256x256@2/apps/dev.zmk.Studio.png

$ flatpak-builder --force-clean --user --install-deps-from=flathub --repo=repo builddir dev.zmk.studio.yml
[...]

$ flatpak build-bundle repo zmkstudio.flatpak dev.zmk.Studio --runtime-repo=https://flathub.org/repo/flathub.flatpakrepo
[...]

$ flatpak install ./zmkstudio.flatpak
[...]

$ flatpak run dev.zmk.Studio

[petejohanson]

Thanks for creating the issue. The way Tauri suggests doing this may sorta work, but is really, AFAICT, not-ideal since it's not actually building the flatpack. This would limit the flatpak to x86_64 only. and also probably disqualify this from actually getting submitted to flathub. Will need to consider the time investment needed to "do this right", which I think is worthwhile.

[cfergeau]

I found this tauri/flatpak application on flathub which is using tauri build, it's probably possible to reuse some of what it's doing
https://github.com/flathub/io.github.vemonet.EmojiMart/blob/master/io.github.vemonet.EmojiMart.yml

[cfergeau]

probably disqualify this from actually getting submitted to flathub

This apparently is not a problem, Volaris is doing exactly this (download the .deb and generate the flatpak from its content) and is distributed on flathub.
With that said, I agree it would be cleaner to generate the flatpak directly from the git source code or from a source tarball.