select default region from config file

cmd/localstackpopulator.go

@@ -42,8 +42,9 @@ var lspop = &cobra.Command{
 			"me-south-1", "me-central-1", "sa-east-1", "us-gov-east-1", "us-gov-west-1"}
 
 		var sessions []*session.Session
-
-		for i := 0; i < 4; i++ {
+		sessDef, err := getSession(profile, pop.GetDefaultAWSRegion())
+		sessions = append(sessions, sessDef)
+		for i := 1; i < 4; i++ {
 			gofakeit.Seed(0)
 			sess, err := getSession(profile, regions[gofakeit.Number(0, len(regions)-1)])
 			if err != nil {

cmd/root.go

@@ -10,6 +10,7 @@ import (
 	"github.com/one2nc/cloud-lens/internal/color"
 	"github.com/one2nc/cloud-lens/internal/config"
 	"github.com/one2nc/cloud-lens/internal/view"
+	pop "github.com/one2nc/cloud-lens/populator"
 	"github.com/rs/zerolog"
 	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
@@ -28,7 +29,7 @@ var (
 
 func init() {
 	rootCmd.PersistentFlags().StringVarP(&profile, "profile", "p", "default", "Read aws profile")
-	rootCmd.PersistentFlags().StringVarP(&region, "region", "r", "ap-south-1", "Read aws region")
+	rootCmd.PersistentFlags().StringVarP(&region, "region", "r", "", "Read aws region")
 }
 
 func Execute() {
@@ -53,10 +54,15 @@ func run(cmd *cobra.Command, args []string) {
 
 	//TODO profiles and regions should under aws
 	profiles := readAndValidateProfile()
-	regions := readAndValidateRegion()
+	if profiles[0] == "default" && len(region) == 0 {
+		region = pop.GetDefaultAWSRegion()
+	} else {
+		region = "ap-south-1"
+	}
 
+	regions := readAndValidateRegion()
 	//TODO Move this in the AWS folder
-	sess, err := config.GetSession(profiles[0], regions[0])
+	sess, err := config.GetSession(profiles[0], pop.GetDefaultAWSRegion())
 	if err != nil {
 		panic(fmt.Sprintf("aws session init failed -- %v", err))
 	}

populator/populator.go

@@ -2,11 +2,14 @@ package pop
 
 import (
 	"bytes"
+	"context"
 	"fmt"
 	"io/ioutil"
 	"log"
+	"os"
 	"strconv"
 
+	"github.com/aws/aws-sdk-go-v2/config"
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/aws/session"
 	"github.com/aws/aws-sdk-go/service/ec2"
@@ -670,3 +673,13 @@ func CreateLambdaFunction(sessions []*session.Session) error {
 	}
 	return nil
 }
+
+func GetDefaultAWSRegion() string {
+	cfg, err := config.LoadDefaultConfig(context.TODO())
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "failed to load AWS SDK config: %v\n", err)
+		os.Exit(1)
+	}
+	region := cfg.Region
+	return region
+}