script.sh

#!/bin/sh -e

setup_git() {
	if [ -n "${GITHUB_WORKSPACE}" ]; then
		git config --global --add safe.directory "${GITHUB_WORKSPACE}" || exit 1
		git config --global --add safe.directory "${GITHUB_WORKSPACE}/${INPUT_WORKDIR}" || exit 1
		cd "${GITHUB_WORKSPACE}/${INPUT_WORKDIR}" || exit 1
	fi
}

setup_reviewdog() {
	export REVIEWDOG_GITHUB_API_TOKEN="${INPUT_GITHUB_TOKEN}"
	TEMP_PATH="$(mktemp -d)"
	PATH="${TEMP_PATH}:$PATH"
	echo '::group::🐶 Installing reviewdog ... https://github.com/reviewdog/reviewdog'
	curl -sfL https://raw.githubusercontent.com/reviewdog/reviewdog/master/install.sh | sh -s -- -b "${TEMP_PATH}" "${REVIEWDOG_VERSION}" 2>&1
	echo '::endgroup::'
}

setup_erblint() {
	echo '::group:: Installing erb-lint with extensions ... https://github.com/Shopify/erb-lint'
	# if 'gemfile' erb-lint version selected
	if [ "$INPUT_ERBLINT_VERSION" = "gemfile" ]; then
		# if Gemfile.lock is here
		if [ -f 'Gemfile.lock' ]; then
			# grep for erb-lint version
			ERBLINT_GEMFILE_VERSION=$(ruby -ne 'print $& if /^\s{4}erb_lint\s\(\K.*(?=\))/' Gemfile.lock)
			# if erb-lint version found, then pass it to the gem install
			# left it empty otherwise, so no version will be passed
			if [ -n "$ERBLINT_GEMFILE_VERSION" ]; then
				ERBLINT_VERSION=$ERBLINT_GEMFILE_VERSION
			else
				printf "Cannot get the erb-lint's version from Gemfile.lock. The latest version will be installed."
			fi
		else
			printf 'Gemfile.lock not found. The latest version will be installed.'
		fi
	else
		# set desired erb-lint version
		ERBLINT_VERSION=$INPUT_ERBLINT_VERSION
	fi
	gem install -N erb_lint --version "${ERBLINT_VERSION}"
	echo '::endgroup::'
}

setup_bundler() {
	if [ "${INPUT_USE_BUNDLER}" = "false" ]; then
		BUNDLE_EXEC=""
	else
		BUNDLE_EXEC="bundle exec "
	fi
}

run_linter() {
	echo '::group:: Running erb-lint with reviewdog 🐶 ...'
	${BUNDLE_EXEC}erblint --lint-all --format compact |
		reviewdog \
			-efm="%f:%l:%c: %m" \
			-reporter="${INPUT_REPORTER}" \
			-filter-mode="${INPUT_FILTER_MODE}" \
			-level="${INPUT_LEVEL}"
	echo '::endgroup::'
}

setup_git
setup_reviewdog
setup_erblint
setup_bundler
run_linter