Golang ast.ObjectList類代碼示例

func parseImport(result *File, list *ast.ObjectList) error {
	list = list.Children()
	if len(list.Items) == 0 {
		return nil
	}

	// Go through each object and turn it into an actual result.
	collection := make([]*Import, 0, len(list.Items))
	seen := make(map[string]struct{})
	for _, item := range list.Items {
		key := item.Keys[0].Token.Value().(string)

		// Make sure we haven't already found this import
		if _, ok := seen[key]; ok {
			return fmt.Errorf("import '%s' defined more than once", key)
		}
		seen[key] = struct{}{}

		// Check for invalid keys
		if err := checkHCLKeys(item.Val, nil); err != nil {
			return multierror.Prefix(err, fmt.Sprintf(
				"import '%s':", key))
		}

		collection = append(collection, &Import{
			Source: key,
		})
	}

	result.Imports = collection
	return nil
}

func parseFoundations(result *Infrastructure, list *ast.ObjectList) error {
	list = list.Children()
	if len(list.Items) == 0 {
		return nil
	}

	// Go through each object and turn it into an actual result.
	collection := make([]*Foundation, 0, len(list.Items))
	seen := make(map[string]struct{})
	for _, item := range list.Items {
		n := item.Keys[0].Token.Value().(string)

		// Make sure we haven't already found this
		if _, ok := seen[n]; ok {
			return fmt.Errorf("foundation '%s' defined more than once", n)
		}
		seen[n] = struct{}{}

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

		var f Foundation
		f.Name = n
		f.Config = m

		collection = append(collection, &f)
	}

	// Set the results
	result.Foundations = collection
	return nil
}

func (j *Job) parseGroups(list *ast.ObjectList) error {
	list = list.Children()
	if len(list.Items) == 0 {
		return nil
	}

	seen := make(map[string]struct{})
	for _, item := range list.Items {
		n := item.Keys[0].Token.Value().(string)

		// Make sure we haven't already found this
		if _, ok := seen[n]; ok {
			return fmt.Errorf("group '%s' defined more than once", n)
		}
		seen[n] = struct{}{}

		// We need this later
		obj, ok := item.Val.(*ast.ObjectType)
		if !ok {
			return fmt.Errorf("group '%s': should be an object", n)
		}

		// Build the group with the basic decode
		tg := &TaskGroup{}
		tg.Name = TaskGroupName(n)
		if err := tg.parse(obj); err != nil {
			return maskAny(err)
		}

		j.Groups = append(j.Groups, tg)
	}

	return nil
}

// parse a list of tasks
func (tasks *parseTaskList) parseTasks(list *ast.ObjectList, anonymousGroup bool) error {
	list = list.Children()
	if len(list.Items) == 0 {
		return nil
	}

	// Get all the maps of keys to the actual object
	seen := make(map[string]struct{})
	for _, item := range list.Items {
		n := item.Keys[0].Token.Value().(string)
		if _, ok := seen[n]; ok {
			return fmt.Errorf("task '%s' defined more than once", n)
		}
		seen[n] = struct{}{}
		obj, ok := item.Val.(*ast.ObjectType)
		if !ok {
			return fmt.Errorf("task '%s': should be an object", n)
		}

		t := &parseTask{}
		t.Name = TaskName(n)
		if err := t.parse(obj, anonymousGroup); err != nil {
			return maskAny(err)
		}

		*tasks = append(*tasks, t)
	}

	return nil
}

// LoadOutputsHcl recurses into the given HCL object and turns
// it into a mapping of outputs.
func loadOutputsHcl(list *ast.ObjectList) ([]*Output, error) {
	list = list.Children()
	if len(list.Items) == 0 {
		return nil, nil
	}

	// Go through each object and turn it into an actual result.
	result := make([]*Output, 0, len(list.Items))
	for _, item := range list.Items {
		n := item.Keys[0].Token.Value().(string)

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

		rawConfig, err := NewRawConfig(config)
		if err != nil {
			return nil, fmt.Errorf(
				"Error reading config for output %s: %s",
				n,
				err)
		}

		result = append(result, &Output{
			Name:      n,
			RawConfig: rawConfig,
		})
	}

	return result, nil
}

func parsePorts(networkObj *ast.ObjectList, nw *structs.NetworkResource) error {
	portsObjList := networkObj.Filter("port")
	knownPortLabels := make(map[string]bool)
	for _, port := range portsObjList.Items {
		if len(port.Keys) == 0 {
			return fmt.Errorf("ports must be named")
		}
		label := port.Keys[0].Token.Value().(string)
		if !reDynamicPorts.MatchString(label) {
			return errPortLabel
		}
		l := strings.ToLower(label)
		if knownPortLabels[l] {
			return fmt.Errorf("found a port label collision: %s", label)
		}
		var p map[string]interface{}
		var res structs.Port
		if err := hcl.DecodeObject(&p, port.Val); err != nil {
			return err
		}
		if err := mapstructure.WeakDecode(p, &res); err != nil {
			return err
		}
		res.Label = label
		if res.Value > 0 {
			nw.ReservedPorts = append(nw.ReservedPorts, res)
		} else {
			nw.DynamicPorts = append(nw.DynamicPorts, res)
		}
		knownPortLabels[l] = true
	}
	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 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 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 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 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 loadConfigOutputs(hclConfig *ast.ObjectList) ([]*tfcfg.Output, error) {
	hclConfig = hclConfig.Children()
	result := make([]*tfcfg.Output, 0, len(hclConfig.Items))

	if len(hclConfig.Items) == 0 {
		return result, nil
	}

	for _, item := range hclConfig.Items {
		n := item.Keys[0].Token.Value().(string)

		if _, ok := item.Val.(*ast.ObjectType); !ok {
			return nil, fmt.Errorf("output '%s': should be a block", n)
		}

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

		rawConfig, err := tfcfg.NewRawConfig(config)
		if err != nil {
			return nil, fmt.Errorf(
				"error reading output config %s: %s", n, err,
			)
		}

		result = append(result, &tfcfg.Output{
			Name:      n,
			RawConfig: rawConfig,
		})
	}

	return result, 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
}