[Refactor]: samples-go to fix linter errors

.golangci.yml

@@ -10,9 +10,6 @@ linters:
     # make sure all errors returned by functions are handled
     - errcheck
 
-    # find unused code
-    - deadcode
-
     # show how code can be simplified
     - gosimple
 
@@ -35,12 +32,6 @@ linters:
     # find unused variables, functions, structs, types, etc.
     - unused
 
-    # find unused struct fields
-    - structcheck
-
-    # find unused global variables
-    - varcheck
-
     # parse and typecheck code
     - typecheck
 

S3-Keploy/bucket/bucket.go

@@ -1,3 +1,4 @@
+// Package bucket contains bucket struct and its methods
 package bucket
 
 import (
@@ -11,27 +12,27 @@ import (
 	"github.com/aws/aws-sdk-go-v2/service/s3/types"
 )
 
-type BucketBasics struct {
+type Basics struct {
 	S3Client *s3.Client
 }
 
-func (basics BucketBasics) ListAllBuckets() (buckets []string) {
+func (basics Basics) ListAllBuckets() (buckets []string) {
 	result, err := basics.S3Client.ListBuckets(context.TODO(), &s3.ListBucketsInput{})
 	if err != nil {
 		fmt.Printf("Couldn't list buckets for your account. Here's why: %v\n", err)
 		return
 	}
 	if len(result.Buckets) == 0 {
 		return append(buckets, "You don't have any buckets!")
-	} else {
-		for _, bucket := range result.Buckets {
-			buckets = append(buckets, *bucket.Name)
-		}
+	}
+
+	for _, bucket := range result.Buckets {
+		buckets = append(buckets, *bucket.Name)
 	}
 	return buckets
 }
 
-func (basics BucketBasics) DeleteOneBucket(bucket string) (message string) {
+func (basics Basics) DeleteOneBucket(bucket string) (message string) {
 	var msg string
 	_, err := basics.S3Client.DeleteBucket(context.TODO(), &s3.DeleteBucketInput{
 		Bucket: aws.String(bucket)})
@@ -43,7 +44,7 @@ func (basics BucketBasics) DeleteOneBucket(bucket string) (message string) {
 	return msg
 }
 
-func (basics BucketBasics) CreateOneBucket(bucket string) (message string) {
+func (basics Basics) CreateOneBucket(bucket string) (message string) {
 
 	_, err := basics.S3Client.CreateBucket(context.TODO(), &s3.CreateBucketInput{
 		Bucket: aws.String(bucket),
@@ -61,29 +62,35 @@ func (basics BucketBasics) CreateOneBucket(bucket string) (message string) {
 	return msg
 }
 
-func (basic BucketBasics) UploadFile(fileName string, bucketName string) (message string) {
+func (basics Basics) UploadFile(fileName string, bucketName string) (message string) {
 	file, err := os.Open(fileName)
 	if err != nil {
 		log.Printf("Couldn't open file %v to upload. Here's why: %v\n", fileName, err)
 		return "File " + fileName + " not uploaded"
-	} else {
-		defer file.Close()
-		_, err = basic.S3Client.PutObject(context.TODO(), &s3.PutObjectInput{
-			Bucket: aws.String(bucketName),
-			Key:    aws.String(fileName),
-			Body:   file,
-		})
+	}
+
+	defer func() {
+		err = file.Close()
 		if err != nil {
-			log.Printf("Couldn't upload file %v to %v:%v. Here's why: %v\n",
-				fileName, bucketName, fileName, err)
-			return "File " + fileName + " not uploaded"
+			log.Println(err)
 		}
-		return "File " + fileName + " uploaded successfully"
+	}()
+
+	_, err = basics.S3Client.PutObject(context.TODO(), &s3.PutObjectInput{
+		Bucket: aws.String(bucketName),
+		Key:    aws.String(fileName),
+		Body:   file,
+	})
+	if err != nil {
+		log.Printf("Couldn't upload file %v to %v:%v. Here's why: %v\n",
+			fileName, bucketName, fileName, err)
+		return "File " + fileName + " not uploaded"
 	}
+	return "File " + fileName + " uploaded successfully"
 }
 
-func (basic BucketBasics) DeleteAllObjects(bucketName string) (message string) {
-	result, err := basic.S3Client.ListObjectsV2(context.TODO(), &s3.ListObjectsV2Input{
+func (basics Basics) DeleteAllObjects(bucketName string) (message string) {
+	result, err := basics.S3Client.ListObjectsV2(context.TODO(), &s3.ListObjectsV2Input{
 		Bucket: aws.String(bucketName),
 	})
 	if err != nil {
@@ -97,19 +104,19 @@ func (basic BucketBasics) DeleteAllObjects(bucketName string) (message string) {
 	for _, key := range objectKeys {
 		objectIds = append(objectIds, types.ObjectIdentifier{Key: aws.String(key)})
 	}
-	_, err = basic.S3Client.DeleteObjects(context.TODO(), &s3.DeleteObjectsInput{
+	_, err = basics.S3Client.DeleteObjects(context.TODO(), &s3.DeleteObjectsInput{
 		Bucket: aws.String(bucketName),
 		Delete: &types.Delete{Objects: objectIds},
 	})
 	if err != nil {
 		return "Couldn't delete objects from bucket " + bucketName + " . Here's why: " + err.Error() + "\n"
-	} else {
-		return "All objects deleted successfully"
 	}
+
+	return "All objects deleted successfully"
 }
 
-func (basic BucketBasics) GetAllObjects(bucketName string) []types.Object {
-	result, err := basic.S3Client.ListObjectsV2(context.TODO(), &s3.ListObjectsV2Input{
+func (basics Basics) GetAllObjects(bucketName string) []types.Object {
+	result, err := basics.S3Client.ListObjectsV2(context.TODO(), &s3.ListObjectsV2Input{
 		Bucket: aws.String(bucketName),
 	})
 	var contents []types.Object

S3-Keploy/config/config.go

@@ -1,3 +1,4 @@
+// Package config implements the configuration function
 package config
 
 import (
@@ -9,14 +10,14 @@ import (
 	"github.com/aws/aws-sdk-go-v2/service/s3"
 )
 
-func Configuration() (awsService bucket.BucketBasics) {
+func Configuration() (awsService bucket.Basics) {
 	cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithRegion("ap-south-1"))
 	if err != nil {
 		fmt.Printf("error: %v", err)
 		return
 	}
 
-	awsService = bucket.BucketBasics{
+	awsService = bucket.Basics{
 		S3Client: s3.NewFromConfig(cfg),
 	}
 

S3-Keploy/main.go

@@ -1,8 +1,10 @@
+// Package main starts the application
 package main
 
 import (
 	"S3-Keploy/config"
 	"S3-Keploy/routes"
+	"log"
 
 	"github.com/gofiber/fiber/v2"
 )
@@ -14,5 +16,8 @@ func main() {
 
 	routes.Register(app, awsService)
 
-	app.Listen(":3000")
+	err := app.Listen(":3000")
+	if err != nil {
+		log.Fatal(err)
+	}
 }

S3-Keploy/routes/routes.go

@@ -1,3 +1,4 @@
+// Package routes implements the router function
 package routes
 
 import (
@@ -11,7 +12,7 @@ type Bucket struct {
 	BucketName string `json:"name"`
 }
 
-func Register(app *fiber.App, awsService bucket.BucketBasics) {
+func Register(app *fiber.App, awsService bucket.Basics) {
 	app.Get("/list", func(c *fiber.Ctx) error {
 		return c.JSON(fiber.Map{
 			"buckets": awsService.ListAllBuckets(),