Bump actions/checkout from 4 to 6 #3

	name: Update CITATION.cff metadata

	on:
	push:
	paths-ignore:
	- CITATION.cff

	permissions:
	contents: write

	jobs:
	update-citation:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout repository
	uses: actions/checkout@v6

	- name: Update or add commit and date-released fields
	run: \|
	COMMIT_HASH="${GITHUB_SHA}"
	TODAY="$(date -u +'%Y-%m-%d')"

	# Update or add commit field
	if grep -q "^commit:" CITATION.cff; then
	sed -i "s/^commit:.*/commit: ${COMMIT_HASH}/" CITATION.cff
	else
	echo "commit: ${COMMIT_HASH}" >> CITATION.cff
	fi

	# Update or add date-released field
	if grep -q "^date-released:" CITATION.cff; then
	sed -i "s/^date-released:.*/date-released: ${TODAY}/" CITATION.cff
	else
	echo "date-released: ${TODAY}" >> CITATION.cff
	fi

	- name: Commit changes
	run: \|
	git config user.name "github-actions[bot]"
	git config user.email "github-actions[bot]@users.noreply.github.com"

	git add CITATION.cff

	if ! git diff --cached --quiet; then
	git commit -m "Update CITATION.cff commit and date-released [skip ci]"
	git push
	else
	echo "No changes to commit"
	fi

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