Core24 Snap Classic: Unnecessary Plugs and layout

[whitenoisedev]

Hello,

The past week we tried to use the new core24 base for Obsidian.
Obsidian is classic confined app but meta/snap.yaml produced didn't make much sense to me.
In particular, given that the app has direct access to OS, plugs and (probably) layout are unnecessary.

name: obsidian
title: Obsidian
version: 1.13.4
summary: Obsidian
description: Obsidian
architectures:
- amd64
base: core24
apps:
  obsidian:
    command: command.sh
    plugs:
    - desktop
    - desktop-legacy
    - home
    - x11
    - wayland
    - unity7
    - network
    - gsettings
    - audio-playback
    - pulseaudio
    - opengl
    - browser-support
confinement: classic
grade: stable
environment:
  TMPDIR: $XDG_RUNTIME_DIR
plugs:
  gtk-3-themes:
    interface: content
    target: $SNAP/data-dir/themes
    default-provider: gtk-common-themes
  icon-themes:
    interface: content
    target: $SNAP/data-dir/icons
    default-provider: gtk-common-themes
  sound-themes:
    interface: content
    target: $SNAP/data-dir/sounds
    default-provider: gtk-common-themes
  gnome-46-2404:
    interface: content
    target: $SNAP/gnome-platform
    default-provider: gnome-46-2404
  gpu-2404:
    interface: content
    target: $SNAP/gpu-2404
    default-provider: mesa-2404
  browser-support:
    interface: browser-support
    allow-sandbox: true
layout:
  /usr/lib/x86_64-linux-gnu/webkit2gtk-4.0:
    bind: $SNAP/gnome-platform/usr/lib/x86_64-linux-gnu/webkit2gtk-4.0
  /usr/lib/x86_64-linux-gnu/webkit2gtk-4.1:
    bind: $SNAP/gnome-platform/usr/lib/x86_64-linux-gnu/webkit2gtk-4.1
  /usr/share/xml/iso-codes:
    bind: $SNAP/gnome-platform/usr/share/xml/iso-codes
  /usr/share/libdrm:
    bind: $SNAP/gpu-2404/libdrm
  /usr/share/drirc.d:
    symlink: $SNAP/gpu-2404/drirc.d

Now, the app installs and works fine. However, the submission to snapcraft failed on these ground.

We manually removed from meta/snap.yaml all the plugs and all the layouts, the app still worked fine and it was accepted by snapcraft.

So I believe, the plugs and layout should not be added for classically confined snaps.