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Flutter Extensions

Scope

This extension enables easy creation of snaps that target flutter, specifically the flutter desktop configuration.

An extension variant per each flutter channel available shall be available that reproduces the setup required to target a given flutter channel, these channels are:

  • flutter-stable (ideally, the default).
  • flutter-beta
  • flutter-dev
  • flutter-master

Under the hood, these extensions shall setup the run time part of the extension leveraging the use of the gnome-3-28 extension as it is the GNOME stack that the flutter desktop integration currently targets.

Use of the flutter plugin is optional, the plugin just drives the build for flutter project sources.

Using the extension

As a Snapcraft snap author, given a snap with an application foo, the following snippet would enable use of the flutter-master extension:

apps:
  foo:
    command: foo
    extension: [flutter-master]

Differences with the GNOME extension

This extension has many similarities to the GNOME one. To reduce cognitive load for a flutter developer working on other platforms and wanting to create a snap, a new extension name was decided upon.

This extension shall use the same list of plugs as used for the GNOME extensions.

Where it is different is in the use of layouts, as the layouts related to gjs and webkit are not required.

In addition to the command-chain generating part, a new part shall be added flutter-extension and it shall setup flutter will the following commands:

flutter channel master
flutter config --enable-linux-desktop
flutter upgrade
flutter doctor