[chore] apply unkeyed literal initialization prevention

.checkapi.yaml

@@ -67,3 +67,7 @@ ignored_functions:
   - ^Test.*
   - ^Benchmark.*
   - ^Fuzz.*
+
+unkeyed_literal_initialization:
+  enabled: true
+  limit: 1 # this limit will increase over time to 5.

connector/datadogconnector/config.go

@@ -15,6 +15,8 @@ var _ component.Config = (*Config)(nil)
 type Config struct {
 	// Traces defines the Traces specific configuration
 	Traces datadogconfig.TracesConnectorConfig `mapstructure:"traces"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 // Validate checks if the configuration is valid

connector/exceptionsconnector/config.go

@@ -13,10 +13,14 @@ import (
 type Dimension struct {
 	Name    string  `mapstructure:"name"`
 	Default *string `mapstructure:"default"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type Exemplars struct {
 	Enabled bool `mapstructure:"enabled"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 // Config defines the configuration options for exceptionsconnector

connector/exceptionsconnector/connector_metrics_test.go

@@ -124,21 +124,21 @@ func newTestMetricsConnector(mcon consumer.Metrics, defaultNullValue *string, lo
 	cfg := &Config{
 		Dimensions: []Dimension{
 			// Set nil defaults to force a lookup for the attribute in the span.
-			{stringAttrName, nil},
-			{intAttrName, nil},
-			{doubleAttrName, nil},
-			{boolAttrName, nil},
-			{mapAttrName, nil},
-			{arrayAttrName, nil},
-			{nullAttrName, defaultNullValue},
+			{Name: stringAttrName},
+			{Name: intAttrName},
+			{Name: doubleAttrName},
+			{Name: boolAttrName},
+			{Name: mapAttrName},
+			{Name: arrayAttrName},
+			{Name: nullAttrName, Default: defaultNullValue},
 			// Add a default value for an attribute that doesn't exist in a span
-			{notInSpanAttrName0, stringp("defaultNotInSpanAttrVal")},
+			{Name: notInSpanAttrName0, Default: stringp("defaultNotInSpanAttrVal")},
 			// Leave the default value unset to test that this dimension should not be added to the metric.
-			{notInSpanAttrName1, nil},
+			{Name: notInSpanAttrName1},
 
 			// Exception specific dimensions
-			{exceptionTypeKey, nil},
-			{exceptionMessageKey, nil},
+			{Name: exceptionTypeKey},
+			{Name: exceptionMessageKey},
 		},
 		Exemplars: Exemplars{
 			Enabled: true,

connector/servicegraphconnector/config.go

@@ -62,4 +62,7 @@ type StoreConfig struct {
 	MaxItems int `mapstructure:"max_items"`
 	// TTL is the time to live for items in the store.
 	TTL time.Duration `mapstructure:"ttl"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }

connector/spanmetricsconnector/config.go

@@ -107,22 +107,30 @@ type HistogramConfig struct {
 type ExemplarsConfig struct {
 	Enabled         bool `mapstructure:"enabled"`
 	MaxPerDataPoint *int `mapstructure:"max_per_data_point"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type ExponentialHistogramConfig struct {
 	MaxSize int32 `mapstructure:"max_size"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type ExplicitHistogramConfig struct {
 	// Buckets is the list of durations representing explicit histogram buckets.
 	Buckets []time.Duration `mapstructure:"buckets"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type EventsConfig struct {
 	// Enabled is a flag to enable events.
 	Enabled bool `mapstructure:"enabled"`
 	// Dimensions defines the list of dimensions to add to the events metric.
 	Dimensions []Dimension `mapstructure:"dimensions"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 var _ xconfmap.Validator = (*Config)(nil)

exporter/awss3exporter/config.go

@@ -73,6 +73,8 @@ const (
 type ResourceAttrsToS3 struct {
 	// S3Prefix indicates the mapping of the key (directory) prefix used for writing into the bucket to a specific resource attribute value.
 	S3Prefix string `mapstructure:"s3_prefix"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 // Config contains the main configuration options for the s3 exporter

exporter/cassandraexporter/config.go

@@ -23,13 +23,19 @@ type Config struct {
 type Replication struct {
 	Class             string `mapstructure:"class"`
 	ReplicationFactor int    `mapstructure:"replication_factor"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type Compression struct {
 	Algorithm string `mapstructure:"algorithm"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type Auth struct {
 	UserName string              `mapstructure:"username"`
 	Password configopaque.String `mapstructure:"password"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }

exporter/elasticsearchexporter/config.go

@@ -129,27 +129,42 @@ type TelemetrySettings struct {
 
 	LogFailedDocsInput          bool          `mapstructure:"log_failed_docs_input"`
 	LogFailedDocsInputRateLimit time.Duration `mapstructure:"log_failed_docs_input_rate_limit"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type LogstashFormatSettings struct {
 	Enabled         bool   `mapstructure:"enabled"`
 	PrefixSeparator string `mapstructure:"prefix_separator"`
 	DateFormat      string `mapstructure:"date_format"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type DynamicIndexSetting struct {
 	// Enabled enables dynamic index routing.
 	//
 	// Deprecated: [v0.122.0] This config is now ignored. Dynamic index routing is always done by default.
 	Enabled bool `mapstructure:"enabled"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type DynamicIDSettings struct {
 	Enabled bool `mapstructure:"enabled"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type DynamicPipelineSettings struct {
 	Enabled bool `mapstructure:"enabled"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 // AuthenticationSettings defines user authentication related settings.
@@ -164,6 +179,9 @@ type AuthenticationSettings struct {
 	//
 	// https://www.elastic.co/guide/en/elasticsearch/reference/current/security-api-create-api-key.html
 	APIKey configopaque.String `mapstructure:"api_key"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 // DiscoverySettings defines Elasticsearch node discovery related settings.
@@ -183,6 +201,9 @@ type DiscoverySettings struct {
 	// Interval instructs the exporter to renew the list of Elasticsearch URLs
 	// with the given interval. URLs will not be updated if Interval is <=0.
 	Interval time.Duration `mapstructure:"interval"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 // FlushSettings defines settings for configuring the write buffer flushing
@@ -194,6 +215,9 @@ type FlushSettings struct {
 
 	// Interval configures the max age of a document in the send buffer.
 	Interval time.Duration `mapstructure:"interval"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 // RetrySettings defines settings for the HTTP request retries in the Elasticsearch exporter.
@@ -235,6 +259,9 @@ type MappingsSettings struct {
 	//
 	// If unspecified, all mapping modes are allowed.
 	AllowedModes []string `mapstructure:"allowed_modes"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type MappingMode int

exporter/honeycombmarkerexporter/config.go

@@ -56,6 +56,9 @@ type Marker struct {
 type Rules struct {
 	// LogConditions is the list of ottllog conditions that determine a match
 	LogConditions []string `mapstructure:"log_conditions"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 var _ component.Config = (*Config)(nil)

exporter/loadbalancingexporter/config.go

@@ -54,6 +54,8 @@ type Config struct {
 // Protocol holds the individual protocol-specific settings. Only OTLP is supported at the moment.
 type Protocol struct {
 	OTLP otlpexporter.Config `mapstructure:"otlp"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 // ResolverSettings defines the configurations for the backend resolver
@@ -62,11 +64,15 @@ type ResolverSettings struct {
 	DNS         *DNSResolver         `mapstructure:"dns"`
 	K8sSvc      *K8sSvcResolver      `mapstructure:"k8s"`
 	AWSCloudMap *AWSCloudMapResolver `mapstructure:"aws_cloud_map"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 // StaticResolver defines the configuration for the resolver providing a fixed list of backends
 type StaticResolver struct {
 	Hostnames []string `mapstructure:"hostnames"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 // DNSResolver defines the configuration for the DNS resolver
@@ -75,6 +81,8 @@ type DNSResolver struct {
 	Port     string        `mapstructure:"port"`
 	Interval time.Duration `mapstructure:"interval"`
 	Timeout  time.Duration `mapstructure:"timeout"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 // K8sSvcResolver defines the configuration for the DNS resolver
@@ -83,6 +91,8 @@ type K8sSvcResolver struct {
 	Ports           []int32       `mapstructure:"ports"`
 	Timeout         time.Duration `mapstructure:"timeout"`
 	ReturnHostnames bool          `mapstructure:"return_hostnames"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type AWSCloudMapResolver struct {

exporter/logicmonitorexporter/config.go

@@ -34,6 +34,8 @@ type Config struct {
 type APIToken struct {
 	AccessID  string              `mapstructure:"access_id"`
 	AccessKey configopaque.String `mapstructure:"access_key"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type MappingOperation string
@@ -58,6 +60,8 @@ func (mop *MappingOperation) UnmarshalText(in []byte) error {
 type LogsConfig struct {
 	// Operation to be performed for resource mapping. Valid values are `and`, `or`.
 	ResourceMappingOperation MappingOperation `mapstructure:"resource_mapping_op"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 func (c *Config) Validate() error {

exporter/prometheusremotewriteexporter/config.go

@@ -62,11 +62,17 @@ type Config struct {
 type CreatedMetric struct {
 	// Enabled if true the _created metrics could be exported
 	Enabled bool `mapstructure:"enabled"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type TargetInfo struct {
 	// Enabled if false the target_info metric is not generated by the exporter
 	Enabled bool `mapstructure:"enabled"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 // RemoteWriteQueue allows to configure the remote write queue.
@@ -82,6 +88,9 @@ type RemoteWriteQueue struct {
 	// NumWorkers configures the number of workers used by
 	// the collector to fan out remote write requests.
 	NumConsumers int `mapstructure:"num_consumers"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 // TODO(jbd): Add capacity, max_samples_per_send to QueueConfig.

exporter/rabbitmqexporter/config.go

@@ -38,6 +38,8 @@ type RoutingConfig struct {
 
 type AuthConfig struct {
 	Plain PlainAuth `mapstructure:"plain"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type PlainAuth struct {

extension/azureauthextension/config.go

@@ -31,24 +31,32 @@ type Config struct {
 	Workload         *WorkloadIdentity `mapstructure:"workload_identity"`
 	ServicePrincipal *ServicePrincipal `mapstructure:"service_principal"`
 	UseDefault       bool              `mapstructure:"use_default"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type ManagedIdentity struct {
 	// if left empty, then it is system managed
 	ClientID string `mapstructure:"client_id"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type WorkloadIdentity struct {
 	ClientID           string `mapstructure:"client_id"`
 	TenantID           string `mapstructure:"tenant_id"`
 	FederatedTokenFile string `mapstructure:"federated_token_file"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type ServicePrincipal struct {
 	TenantID              string `mapstructure:"tenant_id"`
 	ClientID              string `mapstructure:"client_id"`
 	ClientSecret          string `mapstructure:"client_secret"`
 	ClientCertificatePath string `mapstructure:"client_certificate_path"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 var _ component.Config = (*Config)(nil)

extension/encoding/awscloudwatchmetricstreamsencodingextension/config.go

@@ -24,6 +24,9 @@ type Config struct {
 	//
 	// See https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-cloudwatch-metricstream.html#cfn-cloudwatch-metricstream-outputformat
 	Format string `mapstructure:"format"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 func (cfg *Config) Validate() error {

extension/encoding/awslogsencodingextension/config.go

@@ -36,6 +36,9 @@ type Config struct {
 	Format string `mapstructure:"format"`
 
 	VPCFlowLogConfig VPCFlowLogConfig `mapstructure:"vpc_flow_log"`
+
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 type VPCFlowLogConfig struct {
@@ -45,6 +48,8 @@ type VPCFlowLogConfig struct {
 	//
 	// See https://docs.aws.amazon.com/vpc/latest/userguide/flow-logs-s3-path.html.
 	FileFormat string `mapstructure:"file_format"`
+	// prevent unkeyed literal initialization
+	_ struct{}
 }
 
 func (cfg *Config) Validate() error {