Update `validator.yml` to fix maintenance issues (dependencies, disk space, error throwing) #1


	name: Check for Windows line endings
	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	check-line-endings:
	runs-on: ubuntu-latest

	steps:

	- name: Checkout
	uses: actions/checkout@v2
	with:
	# make sure to download directly from the PR's repo, whether that is this repo or a fork
	# By default github generates a merge commit for each PR in this repo, but only for the one branch under test
	# but `git-annex` needs access to two branches: the current branch and `git-annex`
	# this might be subtly buggy since it is testing the remote version, not the merged version
	#
	# if this is not a pull request, this will fall back to its default behaviour.
	repository: ${{github.event.pull_request.head.repo.full_name}}
	ref: ${{ github.event.pull_request.head.ref }}

	- name: Install dos2unix
	run: \|
	# the easy way to do this: convert everything to unix and ask git if that changed anything
	sudo apt-get install -y dos2unix

	- name: Check line endings
	run: \|
	# the easy way to do this: convert everything to unix and ask git if that changed anything

	find ./ -path ./.git -prune -o -type f -print0 \| xargs -0 dos2unix -q
	# this version is safer, but more maintenance:
	#find ./ -path ./.git -prune -o -type f $ ! -name ".nii" -a ! -name ".nii.gz" $ -print0 \| xargs -0 dos2unix -q

	git diff --stat --exit-code
	if [ "$?" -ne 0 ]; then
	echo "error: Windows line endings found."
	exit 1
	fi

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