Snap package file too big

[charlesschaefer]

I've tried to build a snap package for my tauri 2 app, following the instructions we have in the docs (https://v2.tauri.app/distribute/snapcraft/), but my final snap package has 3GB, while my app has only 17MB after a regular build.

Is there anything I can do to avoid that to happen?

Here's my repo with the snapcraft.yml file: https://github.com/charlesschaefer/addiction-tracker

[FabianLars]

Hey, thanks for the report. I just updated the template in the docs and since i used your app to test it, i still have the app specific config for you to try:

name: addiction-tracker
base: core22
version: '0.0.4'
summary: An app to help with your addiction # 79 char long summary
description: |
  Addiction tracker helps you to stop your addiction by giving you more consciousness over how you 
  use substances and the triggers and emotions related to the use.

grade: stable
confinement: strict

layout:
  /usr/libexec/webkit2gtk-4.1:
    symlink: $SNAP/usr/libexec/webkit2gtk-4.1
  /usr/lib/x86_64-linux-gnu/webkit2gtk-4.1:
    symlink: $SNAP/usr/lib/x86_64-linux-gnu/webkit2gtk-4.1
  /usr/lib/aarch64-linux-gnu/webkit2gtk-4.1:
    symlink: $SNAP/usr/lib/aarch64-linux-gnu/webkit2gtk-4.1
  /usr/lib/webkit2gtk-4.1/injected-bundle:
    symlink: $SNAP/usr/lib/webkit2gtk-4.1/injected-bundle

apps:
  addiction-tracker:
    command: usr/bin/addiction-tracker
    desktop: usr/share/applications/addiction-tracker.desktop
    plugs:
      - wayland
      - x11
      

package-repositories:
  - type: apt
    components: [main]
    suites: [noble]
    key-id: 78E1918602959B9C59103100F1831DDAFC42E99D
    url: https://ppa.launchpad.net/snappy-dev/snapcraft-daily/ubuntu

parts:
  build-app:
    plugin: dump
    build-snaps:
      - node/20/stable
      - rustup/latest/stable
    build-packages:
      - libwebkit2gtk-4.1-dev
      - build-essential
      - curl
      - wget
      - file
      - libxdo-dev
      - libssl-dev
      - libayatana-appindicator3-dev
      - librsvg2-dev
      - dpkg
    stage-packages:
      - libwebkit2gtk-4.1-0
      - libayatana-appindicator3-1
      - libglu1-mesa
      - freeglut3
    source: .
    override-build: |
      set -eu
      npm install
      npm run tauri build -- --bundles deb
      dpkg -x src-tauri/target/release/bundle/deb/*.deb $SNAPCRAFT_PART_INSTALL/
      sed -i -e "s|Icon=addiction-tracker|Icon=/usr/share/icons/hicolor/32x32/apps/addiction-tracker.png|g" $SNAPCRAFT_PART_INSTALL/usr/share/applications/addiction-tracker.desktop

The snap instructions didn't see much use yet so please reach out again if you spot more issues ❤️

[FabianLars]

Ah and yes, it will still be 100mb or so but that's how snap files work, they contain most of the system dependencies they require to run (similar to AppImages)

[charlesschaefer]

That's great. Thank you so much for your help. I was wondering why the file had the build phase inside override-pull, but didn't know snapcraft sufficiently to change that.

I had to change the app section to change from /bin/addiction-tracker to /usr/bin/addiction-tracker. And now it is working, with a final snap with around 125MB.

Thanks for your help. I'll change that file in the documentation and create a PR to the docs repository.

[charlesschaefer]

Oh, I was able to build the snap, but trying to run one specific part of the app where the user can choose a file to "upload" to the app, I got the errors below:

(addiction-tracker:343280): GLib-GIO-WARNING **: 16:51:47.762: Error creating IO channel for /proc/self/mountinfo: Permission denied (g-file-error-quark, 2)

(addiction-tracker:343280): Gtk-WARNING **: 16:51:47.801: Could not find the icon 'user-home-symbolic-ltr'. The 'hicolor' theme
was not found either, perhaps you need to install it.
You can get a copy from:
	https://icon-theme.freedesktop.org/releases

(addiction-tracker:343280): Gtk-WARNING **: 16:51:47.801: Could not load a pixbuf from /org/gtk/libgtk/icons/16x16/status/image-missing.png.
This may indicate that pixbuf loaders or the mime database could not be found.
**
Gtk:ERROR:../../../../gtk/gtkiconhelper.c:494:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /org/gtk/libgtk/icons/16x16/status/image-missing.png: Unrecognized image file format (gdk-pixbuf-error-quark, 3)
Bail out! Gtk:ERROR:../../../../gtk/gtkiconhelper.c:494:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /org/gtk/libgtk/icons/16x16/status/image-missing.png: Unrecognized image file format (gdk-pixbuf-error-quark, 3)
[1]    343280 IOT instruction  snap run addiction-tracker

To solve this problem, I needed to add the gnome extension on my "app" part, and add :desktop, :home and :unity7 plugs. Now it is working as expected.

This is my final file:

name: addiction-tracker
base: core22
version: '0.0.7'
summary: An app to help with your addiction # 79 char long summary
description: |
  Addiction tracker helps you to stop your addiction by giving you more consciousness over how you 
  use substances and the triggers and emotions related to the use.

grade: stable
confinement: strict

layout:
  /usr/libexec/webkit2gtk-4.1:
    symlink: $SNAP/usr/libexec/webkit2gtk-4.1
  /usr/lib/x86_64-linux-gnu/webkit2gtk-4.1:
    symlink: $SNAP/usr/lib/x86_64-linux-gnu/webkit2gtk-4.1
  /usr/lib/aarch64-linux-gnu/webkit2gtk-4.1:
    symlink: $SNAP/usr/lib/aarch64-linux-gnu/webkit2gtk-4.1
  /usr/lib/webkit2gtk-4.1/injected-bundle:
    symlink: $SNAP/usr/lib/webkit2gtk-4.1/injected-bundle

apps:
  addiction-tracker:
    extensions:
      - gnome
    command: usr/bin/addiction-tracker
    desktop: usr/share/applications/addiction-tracker.desktop
    plugs: 
      - wayland
      - x11
      - home
      - desktop
      - unity7

package-repositories:
  - type: apt
    components: [main]
    suites: [noble]
    key-id: 78E1918602959B9C59103100F1831DDAFC42E99D
    url: https://ppa.launchpad.net/snappy-dev/snapcraft-daily/ubuntu

parts:
  build-app:
    plugin: dump
    build-snaps:
      - node/20/stable
      - rustup/latest/stable
    build-packages:
      - libwebkit2gtk-4.1-dev
      - build-essential
      - curl
      - wget
      - file
      - libxdo-dev
      - libssl-dev
      - libayatana-appindicator3-dev
      - librsvg2-dev
      - dpkg
    stage-packages:
      - libwebkit2gtk-4.1-0
      - libayatana-appindicator3-1
      - libglu1-mesa
      - freeglut3
    source: .
    override-build: |
      set -eu
      rustup default stable
      npm install
      npm run tauri build -- --bundles deb
      dpkg -x src-tauri/target/x86_64-unknown-linux-gnu/release/bundle/deb/*.deb $SNAPCRAFT_PART_INSTALL/
      sed -i -e "s|Icon=addiction-tracker|Icon=/usr/share/icons/hicolor/32x32/apps/addiction-tracker.png|g" $SNAPCRAFT_PART_INSTALL/usr/share/applications/addiction-tracker.desktop
slots:
  dbus-daemon:
    interface: dbus
    bus: session
    name: com.addictiontracker

[FabianLars]

Thanks for reporting back! I didn't investigate the plugs and extensions that much so i assume other apps may need even more, but those seem essential enough for tauri apps so i'll take another look and see if we should add them to the instructions.