version: use `$BTRFS_AUTO_SNAPSHOT_VERSION` #43

	on: [push, pull_request]

	name: 'Trigger: Push action'

	jobs:
	lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	# TODO: running in alpine now, because `shfmt`
	# of the current ubuntu instance lacks `--keep-padding`.
	# Once ubuntu is upgraded to 24.04 or so, get rid of the
	# containers.
	- run: \|
	docker run -v $(pwd):/x -w /x -i --rm alpine <<EOF
	apk add shellcheck shfmt make
	make lint
	EOF
	- run: git diff --exit-code

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