pin flutter SDK version via git submodule #673

	name: CI

	on: [push, pull_request]

	jobs:
	check:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v3

	- name: Checkout flutter submodule
	# We can't do a depth-1 clone, because we need the most recent tag
	# so that Flutter knows its version and sees the constraint in our
	# pubspec is satisfied. It's uncommon for flutter/flutter to go
	# more than 100 commits between tags. Fetch 1000 for good measure.
	# This is also why we don't use the `with submodules` in the
	# `checkout` action.
	run: \|
	git submodule update --init --depth 1000

	- name: Add vendored flutter to PATH
	run: \|
	echo vendor/flutter/bin >> "$GITHUB_PATH"

	- name: Run setup
	run: tools/setup-vendor-flutter

	- name: Display version (Temporary)
	run: \|
	flutter --version

	- name: Download Flutter SDK artifacts (flutter precache)
	run: flutter precache --universal

	- name: Download our dependencies (flutter pub get)
	run: flutter pub get

	- name: Run tools/check
	run: TERM=dumb tools/check --all --verbose

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