Flutter plugin breaks during precache

[bepri]

Bug Description

Currently, the Flutter plugin installs Flutter using an undocumented git-based method, which breaks due to what appear to be some internal forks to git in Flutter:

 :: + flutter precache --linux
::    Woah! You appear to be trying to run flutter as root.
::    We strongly recommend running the flutter tool without superuser privileges.
::   /
:: 📎
:: fatal: Not a valid object name origin/master

(note the last line especially)

The issue here is that we clone with -b stable, which means only the stable branch is present locally. Cloning the master branch instead gets us further, but still fails due to what appears to be the Flutter repository using a placeholder "0.0.0" version in that branch.

However, there is a Flutter snap, which does not appear to have any of these troubles.

We could, alternatively, rename the local remote stable to master as a workaround.

To Reproduce

Attempt to build anything with the Flutter plugin

Environment

Any version of Snapcraft

snapcraft.yaml

name: flutter-hello
version: "1.0"
summary: simple flutter application
description: build a flutter application using core22
base: core22
confinement: strict

apps:
  flutter-hello:
    command: "flutter_hello"
    extensions: [gnome]

parts:
  hello:
    source: .
    plugin: flutter

Relevant log output

:: + flutter precache --linux
::    Woah! You appear to be trying to run flutter as root.
::    We strongly recommend running the flutter tool without superuser privileges.
::   /
:: 📎
:: fatal: Not a valid object name origin/master

Additional context

No response

[syncronize-issues-to-jira]

Thank you for reporting your feedback to us!

The internal ticket has been created: https://warthogs.atlassian.net/browse/CRAFT-4149.

This message was autogenerated

[munch-software]

Good day, is there any workaround for this issue in the meantime?

I have tried building without the Flutter plugin and tried to do things manually on the override-build step but run into all sorts of errors during runtime.

[mr-cal]

Hi @munch-software, unfortunately we don't have a workaround, but we're planning to fix this ASAP - it should be resolved this week.

[bepri]

Relevant upstream issue: flutter/flutter#163198