ci(lint): add prealloc

.golangci.yml

@@ -17,6 +17,7 @@ linters:
     - unused
     - stylecheck
     - errorlint
+    - prealloc
 
 issues:
   exclude:

internal/schemautil/common.go

@@ -51,12 +51,14 @@ func StringSliceToInterfaceSlice(s []string) []interface{} {
 }
 
 func SetTagsTerraformProperties(t map[string]string) []map[string]interface{} {
-	var tags []map[string]interface{}
+	tags := make([]map[string]interface{}, len(t))
+	var i int
 	for k, v := range t {
-		tags = append(tags, map[string]interface{}{
+		tags[i] = map[string]interface{}{
 			"key":   k,
 			"value": v,
-		})
+		}
+		i++
 	}
 
 	return tags

internal/schemautil/service.go

@@ -793,9 +793,9 @@ func copyServicePropertiesFromAPIResponseToTerraform(
 }
 
 func FlattenServiceComponents(r *aiven.Service) []map[string]interface{} {
-	var components []map[string]interface{}
+	components := make([]map[string]interface{}, len(r.Components))
 
-	for _, c := range r.Components {
+	for i, c := range r.Components {
 		component := map[string]interface{}{
 			"component":                   c.Component,
 			"host":                        c.Host,
@@ -808,7 +808,7 @@ func FlattenServiceComponents(r *aiven.Service) []map[string]interface{} {
 			"ssl":   PointerValueOrDefault(c.Ssl, true),
 			"usage": c.Usage,
 		}
-		components = append(components, component)
+		components[i] = component
 	}
 
 	return components

internal/schemautil/userconfig/util.go

@@ -78,7 +78,7 @@ func representationToMap(schemaType SchemaType, representation []byte) (map[stri
 
 // TerraformTypes converts schema representation types to Terraform types.
 func TerraformTypes(types []string) ([]string, []string, error) {
-	var terraformTypes, aivenTypes []string
+	var terraformTypes, aivenTypes []string // nolint:prealloc
 
 	for _, typeValue := range types {
 		switch typeValue {

internal/sdkprovider/service/flink/flink_application_version.go

@@ -232,13 +232,13 @@ func resourceFlinkApplicationVersionCreate(ctx context.Context, d *schema.Resour
 
 // expandFlinkApplicationVersionSourcesOrSinks expands the sources or sinks from the Terraform schema to the Aiven API.
 func expandFlinkApplicationVersionSourcesOrSinks(sources []interface{}) []aiven.FlinkApplicationVersionRelation {
-	var result []aiven.FlinkApplicationVersionRelation
-	for _, source := range sources {
+	result := make([]aiven.FlinkApplicationVersionRelation, len(sources))
+	for i, source := range sources {
 		sourceMap := source.(map[string]interface{})
-		result = append(result, aiven.FlinkApplicationVersionRelation{
+		result[i] = aiven.FlinkApplicationVersionRelation{
 			CreateTable:   sourceMap["create_table"].(string),
 			IntegrationID: sourceMap["integration_id"].(string),
-		})
+		}
 	}
 
 	return result
@@ -325,12 +325,12 @@ func resourceFlinkApplicationVersionRead(ctx context.Context, d *schema.Resource
 
 // flattenFlinkApplicationVersionSourcesOrSinks is a helper function to flatten the sources and sinks fields.
 func flattenFlinkApplicationVersionSourcesOrSinks(sources []aiven.FlinkApplicationVersionRelation) []map[string]interface{} {
-	var result []map[string]interface{}
-	for _, source := range sources {
-		result = append(result, map[string]interface{}{
+	result := make([]map[string]interface{}, len(sources))
+	for i, source := range sources {
+		result[i] = map[string]interface{}{
 			"create_table":   source.CreateTable,
 			"integration_id": source.IntegrationID,
-		})
+		}
 	}
 
 	return result

internal/sdkprovider/service/kafka/kafka_connector.go

@@ -135,15 +135,15 @@ func kafkaConnectorConfigNameShouldNotBeEmpty() func(ctx context.Context, oldVal
 }
 
 func flattenKafkaConnectorTasks(r *aiven.KafkaConnector) []map[string]interface{} {
-	var tasks []map[string]interface{}
+	tasks := make([]map[string]interface{}, len(r.Tasks))
 
-	for _, taskS := range r.Tasks {
+	for i, taskS := range r.Tasks {
 		task := map[string]interface{}{
 			"connector": taskS.Connector,
 			"task":      taskS.Task,
 		}
 
-		tasks = append(tasks, task)
+		tasks[i] = task
 	}
 
 	return tasks

internal/sdkprovider/service/kafkatopic/kafka_topic.go

@@ -335,15 +335,16 @@ func resourceKafkaTopicCreate(ctx context.Context, d *schema.ResourceData, m int
 }
 
 func getTags(d *schema.ResourceData) []aiven.KafkaTopicTag {
-	var tags []aiven.KafkaTopicTag
-	for _, tagD := range d.Get("tag").(*schema.Set).List() {
+	tagSet := d.Get("tag").(*schema.Set)
+	tags := make([]aiven.KafkaTopicTag, tagSet.Len())
+	for i, tagD := range tagSet.List() {
 		tagM := tagD.(map[string]interface{})
 		tag := aiven.KafkaTopicTag{
 			Key:   tagM["key"].(string),
 			Value: tagM["value"].(string),
 		}
 
-		tags = append(tags, tag)
+		tags[i] = tag
 	}
 
 	return tags
@@ -463,7 +464,7 @@ func resourceKafkaTopicReadDatasource(ctx context.Context, d *schema.ResourceDat
 }
 
 func flattenKafkaTopicTags(list []aiven.KafkaTopicTag) []map[string]interface{} {
-	var tags []map[string]interface{}
+	tags := make([]map[string]interface{}, 0, len(list))
 	for _, tagS := range list {
 		tags = append(tags, map[string]interface{}{
 			"key":   tagS.Key,

internal/sdkprovider/service/project/project.go

@@ -426,9 +426,9 @@ func contactEmailListForTerraform(d *schema.ResourceData, field string, contactE
 		return nil
 	}
 
-	var results []string
-	for _, contactEmail := range contactEmails {
-		results = append(results, contactEmail.Email)
+	results := make([]string, len(contactEmails))
+	for i, contactEmail := range contactEmails {
+		results[i] = contactEmail.Email
 	}
 
 	return d.Set(field, results)

internal/sdkprovider/service/vpc/aws_privatelink.go

@@ -54,12 +54,14 @@ func ResourceAWSPrivatelink() *schema.Resource {
 func resourceAWSPrivatelinkCreate(ctx context.Context, d *schema.ResourceData, m interface{}) diag.Diagnostics {
 	client := m.(*aiven.Client)
 
-	var principals []string
 	var project = d.Get("project").(string)
 	var serviceName = d.Get("service_name").(string)
 
-	for _, p := range d.Get("principals").(*schema.Set).List() {
-		principals = append(principals, p.(string))
+	var principalsSet = d.Get("principals").(*schema.Set)
+	principals := make([]string, principalsSet.Len())
+
+	for i, p := range principalsSet.List() {
+		principals[i] = p.(string)
 	}
 
 	_, err := client.AWSPrivatelink.Create(
@@ -130,9 +132,11 @@ func resourceAWSPrivatelinkUpdate(ctx context.Context, d *schema.ResourceData, m
 		return diag.FromErr(err)
 	}
 
-	var principals []string
-	for _, p := range d.Get("principals").(*schema.Set).List() {
-		principals = append(principals, p.(string))
+	principalsSet := d.Get("principals").(*schema.Set)
+	principals := make([]string, principalsSet.Len())
+
+	for i, p := range principalsSet.List() {
+		principals[i] = p.(string)
 	}
 
 	_, err = client.AWSPrivatelink.Update(

internal/sdkprovider/service/vpc/azure_privatelink.go

@@ -67,12 +67,14 @@ func ResourceAzurePrivatelink() *schema.Resource {
 func resourceAzurePrivatelinkCreate(ctx context.Context, d *schema.ResourceData, m interface{}) diag.Diagnostics {
 	client := m.(*aiven.Client)
 
-	var subscriptionIDs []string
 	var project = d.Get("project").(string)
 	var serviceName = d.Get("service_name").(string)
 
-	for _, s := range d.Get("user_subscription_ids").(*schema.Set).List() {
-		subscriptionIDs = append(subscriptionIDs, s.(string))
+	var subscriptionIDsSet = d.Get("user_subscription_ids").(*schema.Set)
+	subscriptionIDs := make([]string, subscriptionIDsSet.Len())
+
+	for i, s := range subscriptionIDsSet.List() {
+		subscriptionIDs[i] = s.(string)
 	}
 
 	_, err := client.AzurePrivatelink.Create(
@@ -141,14 +143,16 @@ func resourceAzurePrivatelinkRead(ctx context.Context, d *schema.ResourceData, m
 func resourceAzurePrivatelinkUpdate(ctx context.Context, d *schema.ResourceData, m interface{}) diag.Diagnostics {
 	client := m.(*aiven.Client)
 
-	var subscriptionIDs []string
 	project, serviceName, err := schemautil.SplitResourceID2(d.Id())
 	if err != nil {
 		return diag.FromErr(err)
 	}
 
-	for _, s := range d.Get("user_subscription_ids").(*schema.Set).List() {
-		subscriptionIDs = append(subscriptionIDs, s.(string))
+	var subscriptionIDsSet = d.Get("user_subscription_ids").(*schema.Set)
+	subscriptionIDs := make([]string, subscriptionIDsSet.Len())
+
+	for i, s := range subscriptionIDsSet.List() {
+		subscriptionIDs[i] = s.(string)
 	}
 
 	_, err = client.AzurePrivatelink.Update(