r/aws_amplify_domain_association.certificate_settings panic, diff and validation fixes #16421

	name: Copyright Checks

	on:
	push:
	branches:
	- main
	- "release/**"
	pull_request:
	paths-ignore:
	- .ci/**
	- .github/**
	- .teamcity/**
	- .release/**
	- infrastructure/repository/labels-service.tf
	- .goreleaser.yml

	## NOTE: !!!
	## When changing these workflows, ensure that the following is updated:
	## - Documentation: docs/continuous-integration.md
	## - Documentation: docs/makefile-cheat-sheet.md
	## - Makefile: ./GNUmakefile

	jobs:
	copywrite:
	name: add headers check
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
	- uses: actions/setup-go@41dfa10bad2bb2ae585af6ee5bb4d7d973ad74ed # v5.1.0
	with:
	go-version-file: go.mod
	# See also: https://github.com/actions/setup-go/issues/54
	- name: go env
	run: \|
	echo "GOCACHE=$(go env GOCACHE)" >> $GITHUB_ENV
	- uses: actions/cache@6849a6489940f00c2f30c0fb92c6274307ccb58a # v4.1.2
	continue-on-error: true
	timeout-minutes: 2
	with:
	path: ${{ env.GOCACHE }}
	key: ${{ runner.os }}-GOCACHE-${{ hashFiles('go.sum') }}-${{ hashFiles('internal/**') }}
	- uses: actions/cache@6849a6489940f00c2f30c0fb92c6274307ccb58a # v4.1.2
	continue-on-error: true
	timeout-minutes: 2
	with:
	path: ~/go/pkg/mod
	key: ${{ runner.os }}-go-pkg-mod-${{ hashFiles('go.sum') }}
	- run: go install github.com/hashicorp/copywrite@latest
	- run: copywrite headers
	- name: Check for Git Differences
	run: \|
	git diff --compact-summary --exit-code \|\| \
	(echo; echo "Unexpected difference in directories after adding copyright headers. Run 'copywrite headers' command and commit."; exit 1)

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