Golang ObjectList.Elem方法代碼示例

func parseRestartPolicy(final **structs.RestartPolicy, list *ast.ObjectList) error {
	list = list.Elem()
	if len(list.Items) > 1 {
		return fmt.Errorf("only one 'restart' block allowed")
	}

	// Get our job object
	obj := list.Items[0]

	var m map[string]interface{}
	if err := hcl.DecodeObject(&m, obj.Val); err != nil {
		return err
	}

	var result structs.RestartPolicy
	dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
		DecodeHook:       mapstructure.StringToTimeDurationHookFunc(),
		WeaklyTypedInput: true,
		Result:           &result,
	})
	if err != nil {
		return err
	}
	if err := dec.Decode(m); err != nil {
		return err
	}

	*final = &result
	return nil
}

func parseUpdate(result *structs.UpdateStrategy, list *ast.ObjectList) error {
	list = list.Elem()
	if len(list.Items) > 1 {
		return fmt.Errorf("only one 'update' block allowed per job")
	}

	// Get our resource object
	o := list.Items[0]

	var m map[string]interface{}
	if err := hcl.DecodeObject(&m, o.Val); err != nil {
		return err
	}

	// Check for invalid keys
	valid := []string{
		"stagger",
		"max_parallel",
	}
	if err := checkHCLKeys(o.Val, valid); err != nil {
		return err
	}

	dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
		DecodeHook:       mapstructure.StringToTimeDurationHookFunc(),
		WeaklyTypedInput: true,
		Result:           result,
	})
	if err != nil {
		return err
	}
	return dec.Decode(m)
}

func parseTelemetry(result **Telemetry, list *ast.ObjectList) error {
	list = list.Elem()
	if len(list.Items) > 1 {
		return fmt.Errorf("only one 'telemetry' block allowed")
	}

	// Get our telemetry object
	listVal := list.Items[0].Val

	// Check for invalid keys
	valid := []string{
		"statsite_address",
		"statsd_address",
		"disable_hostname",
	}
	if err := checkHCLKeys(listVal, valid); err != nil {
		return err
	}

	var m map[string]interface{}
	if err := hcl.DecodeObject(&m, listVal); err != nil {
		return err
	}

	var telemetry Telemetry
	if err := mapstructure.WeakDecode(m, &telemetry); err != nil {
		return err
	}
	*result = &telemetry
	return nil
}

func parseLocalDisk(result **structs.LocalDisk, list *ast.ObjectList) error {
	list = list.Elem()
	if len(list.Items) > 1 {
		return fmt.Errorf("only one 'local_disk' block allowed")
	}

	// Get our local_disk object
	obj := list.Items[0]

	// Check for invalid keys
	valid := []string{
		"sticky",
		"disk",
	}
	if err := checkHCLKeys(obj.Val, valid); err != nil {
		return err
	}

	var m map[string]interface{}
	if err := hcl.DecodeObject(&m, obj.Val); err != nil {
		return err
	}

	var localDisk structs.LocalDisk
	if err := mapstructure.WeakDecode(m, &localDisk); err != nil {
		return err
	}
	*result = &localDisk

	return nil
}

func parseAtlas(result **AtlasConfig, list *ast.ObjectList) error {
	list = list.Elem()
	if len(list.Items) > 1 {
		return fmt.Errorf("only one 'atlas' block allowed")
	}

	// Get our atlas object
	listVal := list.Items[0].Val

	// Check for invalid keys
	valid := []string{
		"infrastructure",
		"token",
		"join",
		"endpoint",
	}
	if err := checkHCLKeys(listVal, valid); err != nil {
		return err
	}

	var m map[string]interface{}
	if err := hcl.DecodeObject(&m, listVal); err != nil {
		return err
	}

	var atlas AtlasConfig
	if err := mapstructure.WeakDecode(m, &atlas); err != nil {
		return err
	}
	*result = &atlas
	return nil
}

func parseAdvertise(result **AdvertiseAddrs, list *ast.ObjectList) error {
	list = list.Elem()
	if len(list.Items) > 1 {
		return fmt.Errorf("only one 'advertise' block allowed")
	}

	// Get our advertise object
	listVal := list.Items[0].Val

	// Check for invalid keys
	valid := []string{
		"http",
		"rpc",
		"serf",
	}
	if err := checkHCLKeys(listVal, valid); err != nil {
		return err
	}

	var m map[string]interface{}
	if err := hcl.DecodeObject(&m, listVal); err != nil {
		return err
	}

	var advertise AdvertiseAddrs
	if err := mapstructure.WeakDecode(m, &advertise); err != nil {
		return err
	}
	*result = &advertise
	return nil
}

func parseResources(result *structs.Resources, list *ast.ObjectList) error {
	list = list.Elem()
	if len(list.Items) == 0 {
		return nil
	}
	if len(list.Items) > 1 {
		return fmt.Errorf("only one 'resource' block allowed per task")
	}

	// Get our resource object
	o := list.Items[0]

	// We need this later
	var listVal *ast.ObjectList
	if ot, ok := o.Val.(*ast.ObjectType); ok {
		listVal = ot.List
	} else {
		return fmt.Errorf("resource: should be an object")
	}

	var m map[string]interface{}
	if err := hcl.DecodeObject(&m, o.Val); err != nil {
		return err
	}
	delete(m, "network")

	if err := mapstructure.WeakDecode(m, result); err != nil {
		return err
	}

	// Parse the network resources
	if o := listVal.Filter("network"); len(o.Items) > 0 {
		if len(o.Items) > 1 {
			return fmt.Errorf("only one 'network' resource allowed")
		}

		var r structs.NetworkResource
		var m map[string]interface{}
		if err := hcl.DecodeObject(&m, o.Items[0].Val); err != nil {
			return err
		}
		if err := mapstructure.WeakDecode(m, &r); err != nil {
			return err
		}

		var networkObj *ast.ObjectList
		if ot, ok := o.Items[0].Val.(*ast.ObjectType); ok {
			networkObj = ot.List
		} else {
			return fmt.Errorf("resource: should be an object")
		}
		if err := parsePorts(networkObj, &r); err != nil {
			return err
		}

		result.Networks = []*structs.NetworkResource{&r}
	}

	return nil
}

func parseTLSConfig(result **config.TLSConfig, list *ast.ObjectList) error {
	list = list.Elem()
	if len(list.Items) > 1 {
		return fmt.Errorf("only one 'tls' block allowed")
	}

	// Get the TLS object
	listVal := list.Items[0].Val

	valid := []string{
		"http",
		"rpc",
		"verify_server_hostname",
		"ca_file",
		"cert_file",
		"key_file",
	}

	if err := checkHCLKeys(listVal, valid); err != nil {
		return err
	}

	var m map[string]interface{}
	if err := hcl.DecodeObject(&m, listVal); err != nil {
		return err
	}

	var tlsConfig config.TLSConfig
	if err := mapstructure.WeakDecode(m, &tlsConfig); err != nil {
		return err
	}
	*result = &tlsConfig
	return nil
}

func parseTelemetry(result **Telemetry, list *ast.ObjectList) error {
	list = list.Elem()
	if len(list.Items) > 1 {
		return fmt.Errorf("only one 'telemetry' block allowed")
	}

	// Get our telemetry object
	listVal := list.Items[0].Val

	// Check for invalid keys
	valid := []string{
		"statsite_address",
		"statsd_address",
		"disable_hostname",
		"collection_interval",
		"publish_allocation_metrics",
		"publish_node_metrics",
		"datadog_address",
		"circonus_api_token",
		"circonus_api_app",
		"circonus_api_url",
		"circonus_submission_interval",
		"circonus_submission_url",
		"circonus_check_id",
		"circonus_check_force_metric_activation",
		"circonus_check_instance_id",
		"circonus_check_search_tag",
		"circonus_check_display_name",
		"circonus_check_tags",
		"circonus_broker_id",
		"circonus_broker_select_tag",
	}
	if err := checkHCLKeys(listVal, valid); err != nil {
		return err
	}

	var m map[string]interface{}
	if err := hcl.DecodeObject(&m, listVal); err != nil {
		return err
	}

	var telemetry Telemetry
	if err := mapstructure.WeakDecode(m, &telemetry); err != nil {
		return err
	}
	if telemetry.CollectionInterval != "" {
		if dur, err := time.ParseDuration(telemetry.CollectionInterval); err != nil {
			return fmt.Errorf("error parsing value of %q: %v", "collection_interval", err)
		} else {
			telemetry.collectionInterval = dur
		}
	}
	*result = &telemetry
	return nil
}

func parseConsulConfig(result **config.ConsulConfig, list *ast.ObjectList) error {
	list = list.Elem()
	if len(list.Items) > 1 {
		return fmt.Errorf("only one 'consul' block allowed")
	}

	// Get our Consul object
	listVal := list.Items[0].Val

	// Check for invalid keys
	valid := []string{
		"address",
		"auth",
		"auto_advertise",
		"ca_file",
		"cert_file",
		"checks_use_advertise",
		"client_auto_join",
		"client_service_name",
		"key_file",
		"server_auto_join",
		"server_service_name",
		"ssl",
		"timeout",
		"token",
		"verify_ssl",
	}

	if err := checkHCLKeys(listVal, valid); err != nil {
		return err
	}

	var m map[string]interface{}
	if err := hcl.DecodeObject(&m, listVal); err != nil {
		return err
	}

	consulConfig := config.DefaultConsulConfig()
	dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
		DecodeHook:       mapstructure.StringToTimeDurationHookFunc(),
		WeaklyTypedInput: true,
		Result:           &consulConfig,
	})
	if err != nil {
		return err
	}
	if err := dec.Decode(m); err != nil {
		return err
	}

	*result = consulConfig
	return nil
}

func parseConstraints(result *[]*structs.Constraint, list *ast.ObjectList) error {
	for _, o := range list.Elem().Items {
		var m map[string]interface{}
		if err := hcl.DecodeObject(&m, o.Val); err != nil {
			return err
		}
		m["LTarget"] = m["attribute"]
		m["RTarget"] = m["value"]
		m["Operand"] = m["operator"]

		// If "version" is provided, set the operand
		// to "version" and the value to the "RTarget"
		if constraint, ok := m[structs.ConstraintVersion]; ok {
			m["Operand"] = structs.ConstraintVersion
			m["RTarget"] = constraint
		}

		// If "regexp" is provided, set the operand
		// to "regexp" and the value to the "RTarget"
		if constraint, ok := m[structs.ConstraintRegex]; ok {
			m["Operand"] = structs.ConstraintRegex
			m["RTarget"] = constraint
		}

		if value, ok := m[structs.ConstraintDistinctHosts]; ok {
			enabled, err := parseBool(value)
			if err != nil {
				return fmt.Errorf("distinct_hosts should be set to true or false; %v", err)
			}

			// If it is not enabled, skip the constraint.
			if !enabled {
				continue
			}

			m["Operand"] = structs.ConstraintDistinctHosts
		}

		// Build the constraint
		var c structs.Constraint
		if err := mapstructure.WeakDecode(m, &c); err != nil {
			return err
		}
		if c.Operand == "" {
			c.Operand = "="
		}

		*result = append(*result, &c)
	}

	return nil
}

func parseServer(result **ServerConfig, list *ast.ObjectList) error {
	list = list.Elem()
	if len(list.Items) > 1 {
		return fmt.Errorf("only one 'server' block allowed")
	}

	// Get our server object
	obj := list.Items[0]

	// Value should be an object
	var listVal *ast.ObjectList
	if ot, ok := obj.Val.(*ast.ObjectType); ok {
		listVal = ot.List
	} else {
		return fmt.Errorf("client value: should be an object")
	}

	// Check for invalid keys
	valid := []string{
		"enabled",
		"bootstrap_expect",
		"data_dir",
		"protocol_version",
		"num_schedulers",
		"enabled_schedulers",
		"node_gc_threshold",
		"heartbeat_grace",
		"start_join",
		"retry_join",
		"retry_max",
		"retry_interval",
		"rejoin_after_leave",
		"encrypt",
	}
	if err := checkHCLKeys(listVal, valid); err != nil {
		return err
	}

	var m map[string]interface{}
	if err := hcl.DecodeObject(&m, listVal); err != nil {
		return err
	}

	var config ServerConfig
	if err := mapstructure.WeakDecode(m, &config); err != nil {
		return err
	}

	*result = &config
	return nil
}

func parsePeriodic(result **structs.PeriodicConfig, list *ast.ObjectList) error {
	list = list.Elem()
	if len(list.Items) > 1 {
		return fmt.Errorf("only one 'periodic' block allowed per job")
	}

	// Get our resource object
	o := list.Items[0]

	var m map[string]interface{}
	if err := hcl.DecodeObject(&m, o.Val); err != nil {
		return err
	}

	// Check for invalid keys
	valid := []string{
		"enabled",
		"cron",
		"prohibit_overlap",
	}
	if err := checkHCLKeys(o.Val, valid); err != nil {
		return err
	}

	// Enabled by default if the periodic block exists.
	if value, ok := m["enabled"]; !ok {
		m["Enabled"] = true
	} else {
		enabled, err := parseBool(value)
		if err != nil {
			return fmt.Errorf("periodic.enabled should be set to true or false; %v", err)
		}
		m["Enabled"] = enabled
	}

	// If "cron" is provided, set the type to "cron" and store the spec.
	if cron, ok := m["cron"]; ok {
		m["SpecType"] = structs.PeriodicSpecCron
		m["Spec"] = cron
	}

	// Build the constraint
	var p structs.PeriodicConfig
	if err := mapstructure.WeakDecode(m, &p); err != nil {
		return err
	}
	*result = &p
	return nil
}

func parseArtifacts(result *[]*structs.TaskArtifact, list *ast.ObjectList) error {
	for _, o := range list.Elem().Items {
		// Check for invalid keys
		valid := []string{
			"source",
			"options",
			"destination",
		}
		if err := checkHCLKeys(o.Val, valid); err != nil {
			return err
		}

		var m map[string]interface{}
		if err := hcl.DecodeObject(&m, o.Val); err != nil {
			return err
		}

		delete(m, "options")

		// Default to downloading to the local directory.
		if _, ok := m["destination"]; !ok {
			m["destination"] = "local/"
		}

		var ta structs.TaskArtifact
		if err := mapstructure.WeakDecode(m, &ta); err != nil {
			return err
		}

		var optionList *ast.ObjectList
		if ot, ok := o.Val.(*ast.ObjectType); ok {
			optionList = ot.List
		} else {
			return fmt.Errorf("artifact should be an object")
		}

		if oo := optionList.Filter("options"); len(oo.Items) > 0 {
			options := make(map[string]string)
			if err := parseArtifactOption(options, oo); err != nil {
				return multierror.Prefix(err, "options: ")
			}
			ta.GetterOptions = options
		}

		*result = append(*result, &ta)
	}

	return nil
}

func parseVaultConfig(result **config.VaultConfig, list *ast.ObjectList) error {
	list = list.Elem()
	if len(list.Items) > 1 {
		return fmt.Errorf("only one 'vault' block allowed")
	}

	// Get our Vault object
	listVal := list.Items[0].Val

	// Check for invalid keys
	valid := []string{
		"address",
		"allow_unauthenticated",
		"enabled",
		"task_token_ttl",
		"ca_file",
		"ca_path",
		"cert_file",
		"key_file",
		"tls_server_name",
		"tls_skip_verify",
		"token",
	}

	if err := checkHCLKeys(listVal, valid); err != nil {
		return err
	}

	var m map[string]interface{}
	if err := hcl.DecodeObject(&m, listVal); err != nil {
		return err
	}

	vaultConfig := config.DefaultVaultConfig()
	dec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
		DecodeHook:       mapstructure.StringToTimeDurationHookFunc(),
		WeaklyTypedInput: true,
		Result:           &vaultConfig,
	})
	if err != nil {
		return err
	}
	if err := dec.Decode(m); err != nil {
		return err
	}

	*result = vaultConfig
	return nil
}