fix: check err before using file object #40

	name: CI

	on: [push, pull_request]

	jobs:
	check:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	with:
	fetch-depth: 0

	- name: Set up Go
	uses: actions/setup-go@v2
	with:
	go-version: 1.17

	- name: Test
	run: \|
	./test.sh

	- name: Run GoReleaser
	uses: goreleaser/goreleaser-action@v2
	with:
	args: build --snapshot
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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