Add workflow to check for new tagged version in miekg/dns and create PR into zmap/dns #10

	name: Sync miekg/dns with zmap/dns

	on:
	# Only for testing
	pull_request:
	# branches: [github-action-when-upstream-tagged]
	schedule:
	- cron: '0 0 * * *' # This will run the action daily
	workflow_dispatch: # Allows manual trigger


	jobs:
	sync-fork:
	runs-on: ubuntu-latest
	steps:
	- name: Check out code
	uses: actions/checkout@v2

	- name: Set up Git user name and email
	run: \|
	git config --global user.name 'GitHub Actions'
	git config --global user.email '[email protected]'

	- name: Fetch upstream changes
	run: \|
	git remote add upstream https://github.com/miekg/dns.git
	git fetch upstream

	- name: Check for changes
	id: check-changes
	run: \|
	if [ $(git rev-list --count HEAD..upstream/master) -gt 0 ]; then
	echo "::set-output name=changes::true"
	else
	echo "::set-output name=changes::false"
	fi

	- name: Create pull request
	if: steps.check-changes.outputs.changes == 'true'
	run: \|
	git checkout -b sync-$(date +'%Y-%m-%d')
	git merge upstream/master --no-edit
	git push origin sync-$(date +'%Y-%m-%d')
	gh pr create --title "Sync with upstream" --body "Automated PR to sync with upstream." --base master --head sync-$(date +'%Y-%m-%d\nDon't forget to tag the new version so it is picked up by users')
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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