refactor(rest-plugin): make it more modular #3664

	name: Lint Commit Messages
	on:
	pull_request:
	types: ['opened', 'edited', 'reopened', 'synchronize']
	push:
	branches:
	- staging

	jobs:
	commitlint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0
	- name: Install CommitLint and Dependencies
	run: npm install @commitlint/config-conventional @commitlint/cli
	- name: Lint Commits
	run: \|
	# Only run for PR's and simply succeed the bors staging branch
	if [ ! ${{ github.ref }} = "refs/heads/staging" ]; then
	first_commit=${{ github.event.pull_request.base.sha }}
	last_commit=${{ github.event.pull_request.head.sha }}
	# Ensure code-review commits don't get merged
	sed "s/code-review-rule': \[0/code-review-rule': [2/g" -i commitlint.config.js
	npx commitlint --from $first_commit --to $last_commit -V

	git log --pretty=format:%s $first_commit..$last_commit > ./subjects
	duplicates="$(cat ./subjects \| sort \| uniq -D)"
	if [ "$duplicates" != "" ]; then
	echo -e "Duplicate commits found:\n$duplicates" >&2
	exit 1
	fi
	fi

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