refactor: do not alter resources from state in middlewares

pkg/middlewares/aws_iam_policy_attachment_defaults.go

@@ -19,9 +19,12 @@ func NewAwsIamPolicyAttachmentDefaults() AwsIamPolicyAttachmentDefaults {
 }
 
 func (m AwsIamPolicyAttachmentDefaults) Execute(remoteResources, resourcesFromState *[]resource.Resource) error {
+	newRemoteResources := make([]resource.Resource, 0)
+
 	for _, remoteResource := range *remoteResources {
 		// Ignore all resources other than iam policy attachment
 		if remoteResource.TerraformType() != aws.AwsIamPolicyAttachmentResourceType {
+			newRemoteResources = append(newRemoteResources, remoteResource)
 			continue
 		}
 
@@ -34,20 +37,29 @@ func (m AwsIamPolicyAttachmentDefaults) Execute(remoteResources, resourcesFromSt
 		}
 
 		if existInState {
+			newRemoteResources = append(newRemoteResources, remoteResource)
 			continue
 		}
 
+		isIgnored := false
 		for _, id := range ignoredIamPolicyAttachmentIds {
 			if remoteResource.TerraformId() == id {
-				*resourcesFromState = append(*resourcesFromState, remoteResource)
-
-				logrus.WithFields(logrus.Fields{
-					"id":   remoteResource.TerraformId(),
-					"type": remoteResource.TerraformType(),
-				}).Debug("Ignoring default iam policy attachment as it is not managed by IaC")
+				isIgnored = true
 			}
 		}
+
+		if !isIgnored {
+			newRemoteResources = append(newRemoteResources, remoteResource)
+			continue
+		}
+
+		logrus.WithFields(logrus.Fields{
+			"id":   remoteResource.TerraformId(),
+			"type": remoteResource.TerraformType(),
+		}).Debug("Ignoring default iam policy attachment as it is not managed by IaC")
 	}
 
+	*remoteResources = newRemoteResources
+
 	return nil
 }

pkg/middlewares/aws_iam_role_defaults.go

@@ -21,9 +21,12 @@ func NewAwsIamRoleDefaults() AwsIamRoleDefaults {
 }
 
 func (m AwsIamRoleDefaults) Execute(remoteResources, resourcesFromState *[]resource.Resource) error {
+	newRemoteResources := make([]resource.Resource, 0)
+
 	for _, remoteResource := range *remoteResources {
 		// Ignore all resources other than iam role
 		if remoteResource.TerraformType() != aws.AwsIamRoleResourceType {
+			newRemoteResources = append(newRemoteResources, remoteResource)
 			continue
 		}
 
@@ -36,20 +39,29 @@ func (m AwsIamRoleDefaults) Execute(remoteResources, resourcesFromState *[]resou
 		}
 
 		if existInState {
+			newRemoteResources = append(newRemoteResources, remoteResource)
 			continue
 		}
 
+		isIgnored := false
 		for _, id := range ignoredIamRoleIds {
 			if remoteResource.TerraformId() == id {
-				*resourcesFromState = append(*resourcesFromState, remoteResource)
-
-				logrus.WithFields(logrus.Fields{
-					"id":   remoteResource.TerraformId(),
-					"type": remoteResource.TerraformType(),
-				}).Debug("Ignoring default iam role as it is not managed by IaC")
+				isIgnored = true
 			}
 		}
+
+		if !isIgnored {
+			newRemoteResources = append(newRemoteResources, remoteResource)
+			continue
+		}
+
+		logrus.WithFields(logrus.Fields{
+			"id":   remoteResource.TerraformId(),
+			"type": remoteResource.TerraformType(),
+		}).Debug("Ignoring default iam policy attachment as it is not managed by IaC")
 	}
 
+	*remoteResources = newRemoteResources
+
 	return nil
 }

pkg/middlewares/aws_iam_role_policy_defaults.go

@@ -20,9 +20,12 @@ func NewAwsIamRolePolicyDefaults() AwsIamRolePolicyDefaults {
 }
 
 func (m AwsIamRolePolicyDefaults) Execute(remoteResources, resourcesFromState *[]resource.Resource) error {
+	newRemoteResources := make([]resource.Resource, 0)
+
 	for _, remoteResource := range *remoteResources {
 		// Ignore all resources other than role policy
 		if remoteResource.TerraformType() != aws.AwsIamRolePolicyResourceType {
+			newRemoteResources = append(newRemoteResources, remoteResource)
 			continue
 		}
 
@@ -35,20 +38,29 @@ func (m AwsIamRolePolicyDefaults) Execute(remoteResources, resourcesFromState *[
 		}
 
 		if existInState {
+			newRemoteResources = append(newRemoteResources, remoteResource)
 			continue
 		}
 
+		isIgnored := false
 		for _, id := range ignoredIamRolePolicyIds {
 			if remoteResource.TerraformId() == id {
-				*resourcesFromState = append(*resourcesFromState, remoteResource)
-
-				logrus.WithFields(logrus.Fields{
-					"id":   remoteResource.TerraformId(),
-					"type": remoteResource.TerraformType(),
-				}).Debug("Ignoring default iam role policy as it is not managed by IaC")
+				isIgnored = true
 			}
 		}
+
+		if !isIgnored {
+			newRemoteResources = append(newRemoteResources, remoteResource)
+			continue
+		}
+
+		logrus.WithFields(logrus.Fields{
+			"id":   remoteResource.TerraformId(),
+			"type": remoteResource.TerraformType(),
+		}).Debug("Ignoring default iam role policy as it is not managed by IaC")
 	}
 
+	*remoteResources = newRemoteResources
+
 	return nil
 }

pkg/middlewares/aws_security_group_defaults.go

@@ -16,9 +16,12 @@ func NewAwsSecurityGroupDefaults() AwsSecurityGroupDefaults {
 }
 
 func (m AwsSecurityGroupDefaults) Execute(remoteResources, resourcesFromState *[]resource.Resource) error {
+	newRemoteResources := make([]resource.Resource, 0)
+
 	for _, remoteResource := range *remoteResources {
 		// Ignore all resources other than iam role
 		if remoteResource.TerraformType() != aws.AwsSecurityGroupResourceType {
+			newRemoteResources = append(newRemoteResources, remoteResource)
 			continue
 		}
 
@@ -31,16 +34,17 @@ func (m AwsSecurityGroupDefaults) Execute(remoteResources, resourcesFromState *[
 		}
 
 		if existInState || *remoteResource.(*aws.AwsSecurityGroup).Name != "default" {
+			newRemoteResources = append(newRemoteResources, remoteResource)
 			continue
 		}
 
-		*resourcesFromState = append(*resourcesFromState, remoteResource)
-
 		logrus.WithFields(logrus.Fields{
 			"id":   remoteResource.TerraformId(),
 			"type": remoteResource.TerraformType(),
 		}).Debug("Ignoring default aws security group as it is not managed by IaC")
 	}
 
+	*remoteResources = newRemoteResources
+
 	return nil
 }

pkg/middlewares/aws_security_group_defaults_test.go

@@ -50,7 +50,7 @@ func TestAwsSecurityGroupDefaults_Execute(t *testing.T) {
 			diff.Changelog{
 				{
 					Type: "delete",
-					Path: []string{"1"},
+					Path: []string{"0"},
 					From: &aws.AwsSecurityGroup{
 						Id:   "test",
 						Name: &dummySecurityGroupName,