Merge pull request #1530 from snyk/feat/handle_gcp_missing_creds

Catch missing credentials error for GCP

Author: sundowndev-snyk

pkg/remote/google/init.go

@@ -28,6 +28,12 @@ func Init(version string, alerter *alerter.Alerter,
 	if err != nil {
 		return err
 	}
+
+	err = provider.CheckCredentialsExist()
+	if err != nil {
+		return err
+	}
+
 	err = provider.Init()
 	if err != nil {
 		return err

pkg/remote/google/provider.go

@@ -1,8 +1,11 @@
 package google
 
 import (
+	"context"
+	"errors"
 	"os"
 
+	asset "cloud.google.com/go/asset/apiv1"
 	"github.com/snyk/driftctl/pkg/output"
 	"github.com/snyk/driftctl/pkg/remote/google/config"
 	"github.com/snyk/driftctl/pkg/remote/terraform"
@@ -62,3 +65,13 @@ func (p *GCPTerraformProvider) GetConfig() config.GCPTerraformConfig {
 		Zone:    os.Getenv("CLOUDSDK_COMPUTE_ZONE"),
 	}
 }
+
+func (p *GCPTerraformProvider) CheckCredentialsExist() error {
+	client, err := asset.NewClient(context.Background())
+	if err != nil {
+		return errors.New("Please use a Service Account to authenticate on GCP.\n" +
+			"For more information: https://cloud.google.com/docs/authentication/production")
+	}
+	_ = client.Close()
+	return nil
+}