Add the linting command

Author: RyanSiu1995

Makefile

@@ -1,5 +1,17 @@
 build:
 	go build -ldflags="-s -w"
 
-tests:
+.PHONY: test
+test:
 	go test -count=1 ./...
+
+format-lint:
+	errors=$$(gofmt -l .); if [ "$${errors}" != "" ]; then echo "Format Lint Error Files:\n$${errors}"; exit 1; fi
+
+import-lint:
+	errors=$$(goimports -l .); if [ "$${errors}" != "" ]; then echo "Import Lint Error Files:\n$${errors}"; exit 1; fi
+
+style-lint:
+	errors=$$(golint ./...); if [ "$${errors}" != "" ]; then echo "Style Lint Error Files:\n$${errors}"; exit 1; fi
+
+lint: format-lint import-lint style-lint

gcb-visualizer.go

@@ -2,9 +2,10 @@ package main
 
 import (
 	"fmt"
+	"os"
+
 	"github.com/RyanSiu1995/gcb-visualizer/cmd"
 	log "github.com/sirupsen/logrus"
-	"os"
 )
 
 func init() {

internal/utils/cloudbuild_test.go

@@ -3,7 +3,6 @@ package util
 import (
 	"bytes"
 	"fmt"
-	"gopkg.in/yaml.v2"
 	"io/ioutil"
 	"os"
 	"path"
@@ -14,6 +13,7 @@ import (
 	graphviz "github.com/goccy/go-graphviz"
 	"github.com/goccy/go-graphviz/cgraph"
 	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v2"
 )
 
 var supportedFormat = []string{".yaml", ".yml", ".json"}