refactor upload into 's3helper' package

main.go

@@ -1,75 +1,19 @@
 package main
 
 import (
+	"backup-tool/s3helper"
 	"context"
-	"github.com/joho/godotenv"
 	"log"
 	"os"
 
-	"github.com/minio/minio-go/v7"
-	"github.com/minio/minio-go/v7/pkg/credentials"
-)
-
-const (
-	ENDPOINT   = "s3.us-west-004.backblazeb2.com"
-	BUCKETNAME = "ducimon-db-backups"
+	"github.com/joho/godotenv"
 )
 
 func main() {
 
-	ctx := context.Background()
 	accessKeyID, secretAccessKey := getCredentials()
-	client := createClient(accessKeyID, secretAccessKey)
-	verifyBucket(client, ctx)
-	absolutePath, basename := validateUploadFile()
+	s3helper.UploadFile(context.Background(), accessKeyID, secretAccessKey)
 
-	_, err := client.FPutObject(ctx, BUCKETNAME, "test", absolutePath, minio.PutObjectOptions{})
-	if err != nil {
-		log.Fatalln(err)
-	}
-
-	log.Printf("upload of %s complete\n", basename)
-}
-
-func validateUploadFile() (string, string) {
-	if len(os.Args) < 2 {
-		log.Fatalln("upload file not specified")
-	}
-
-	file, err := os.Stat(os.Args[1])
-	if err != nil {
-		log.Fatalln(err)
-	}
-
-	if file.IsDir() {
-		log.Fatalln("upload of directories is not supported")
-	}
-
-	return os.Args[1], file.Name()
-}
-
-func verifyBucket(client *minio.Client, ctx context.Context) {
-	exists, err := client.BucketExists(ctx, BUCKETNAME)
-	if err != nil {
-		log.Fatalln(err)
-	}
-
-	if !exists {
-		log.Fatalf("bucket %s does not exist\n", BUCKETNAME)
-	}
-}
-
-func createClient(accessKeyID string, secretAccessKey string) *minio.Client {
-	// Initialize minio client object.
-	minioClient, err := minio.New(ENDPOINT, &minio.Options{
-		Creds:  credentials.NewStaticV4(accessKeyID, secretAccessKey, ""),
-		Secure: true,
-	})
-	if err != nil {
-		log.Fatalln(err)
-	}
-
-	return minioClient
 }
 
 func getCredentials() (string, string) {

s3helper/s3helper.go

@@ -0,0 +1,72 @@
+package s3helper
+
+import (
+	"context"
+	"log"
+	"os"
+
+	"github.com/minio/minio-go/v7"
+	"github.com/minio/minio-go/v7/pkg/credentials"
+)
+
+const (
+	ENDPOINT   = "s3.us-west-004.backblazeb2.com"
+	BUCKETNAME = "ducimon-db-backups"
+)
+
+func UploadFile(ctx context.Context, accessKeyID, secretAccessKey) error {
+
+	client := createClient(accessKeyID, secretAccessKey)
+	verifyBucket(client, ctx)
+	absolutePath, basename := validateUploadFile()
+	_, err := client.FPutObject(ctx, BUCKETNAME, "test", absolutePath, minio.PutObjectOptions{})
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	log.Printf("upload of %s complete\n", basename)
+
+	return nil
+}
+
+func createClient(accessKeyID string, secretAccessKey string) *minio.Client {
+	// Initialize minio client object.
+	minioClient, err := minio.New(ENDPOINT, &minio.Options{
+		Creds:  credentials.NewStaticV4(accessKeyID, secretAccessKey, ""),
+		Secure: true,
+	})
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	return minioClient
+}
+
+func verifyBucket(client *minio.Client, ctx context.Context) {
+	exists, err := client.BucketExists(ctx, BUCKETNAME)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	if !exists {
+		log.Fatalf("bucket %s does not exist\n", BUCKETNAME)
+	}
+}
+
+func validateUploadFile() (string, string) {
+	if len(os.Args) < 2 {
+		log.Fatalln("upload file not specified")
+	}
+
+	file, err := os.Stat(os.Args[1])
+
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	if file.IsDir() {
+		log.Fatalln("upload of directories is not supported")
+	}
+
+	return os.Args[1], file.Name()
+}