Bump actions/checkout from 3.6.0 to 4.0.0 #126

	# yaml-language-server: $schema=https://json.schemastore.org/github-workflow

	name: "Git commits"

	on: # yamllint disable-line rule:truthy
	pull_request: null
	workflow_call: null
	# Add [skip ci] to commit message to skip CI.

	permissions: {} # yamllint disable-line rule:braces
	#permissions: "read-all"
	#permissions:
	# contents: "read" # Private repositories need read permission

	concurrency:
	group: "${{ github.workflow }}-${{ github.ref }}"
	cancel-in-progress: true

	jobs:
	commit_authors:
	name: "Commit author"
	runs-on: "ubuntu-22.04"
	timeout-minutes: 2
	steps:
	-
	name: "Checkout repository"
	uses: "actions/[email protected]"
	with:
	fetch-depth: 0
	-
	name: "Query commit email addresses from GitHub API"
	env:
	GH_TOKEN: "${{ github.token }}"
	run: \|
	Check_author() {
	local AUTHOR_EMAIL="$1"
	local TOTAL_COUNT
	if [ "${AUTHOR_EMAIL#*@}" = users.noreply.github.com ]; then
	echo "${AUTHOR_EMAIL}: 1"
	return
	fi
	TOTAL_COUNT="$(
	gh api search/users \
	--method GET \
	--raw-field q="\"${AUTHOR_EMAIL}\" in:eml type:user" \
	--jq '."total_count"'
	)"
	echo "${AUTHOR_EMAIL}: ${TOTAL_COUNT}"
	if [ "${TOTAL_COUNT}" != 1 ]; then
	echo "::error::Unknown commit email address: ${AUTHOR_EMAIL}"
	fi
	test "${TOTAL_COUNT}" = 1
	}
	COMMIT_RANGE="${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }}"
	git show --no-patch --pretty="format:%ae" "${COMMIT_RANGE}" \
	\| sort --unique \
	\| while read -r AUTHOR; do Check_author "${AUTHOR}"; done

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