terraform-provider-google/google/resource_compute_forwarding_rule.go

// ----------------------------------------------------------------------------
//
//     ***     AUTO GENERATED CODE    ***    AUTO GENERATED CODE     ***
//
// ----------------------------------------------------------------------------
//
//     This file is automatically generated by Magic Modules and manual
//     changes will be clobbered when the file is regenerated.
//
//     Please read more about how to change this file in
//     .github/CONTRIBUTING.md.
//
// ----------------------------------------------------------------------------

package google

import (
	"fmt"
	"log"
	"reflect"
	"strings"
	"time"

	"github.com/hashicorp/terraform/helper/schema"
	"github.com/hashicorp/terraform/helper/validation"
	"google.golang.org/api/compute/v1"
)

func resourceComputeForwardingRule() *schema.Resource {
	return &schema.Resource{
		Create: resourceComputeForwardingRuleCreate,
		Read:   resourceComputeForwardingRuleRead,
		Update: resourceComputeForwardingRuleUpdate,
		Delete: resourceComputeForwardingRuleDelete,

		Importer: &schema.ResourceImporter{
			State: resourceComputeForwardingRuleImport,
		},

		Timeouts: &schema.ResourceTimeout{
			Create: schema.DefaultTimeout(240 * time.Second),
			Update: schema.DefaultTimeout(240 * time.Second),
			Delete: schema.DefaultTimeout(240 * time.Second),
		},

		Schema: map[string]*schema.Schema{
			"name": {
				Type:     schema.TypeString,
				Required: true,
				ForceNew: true,
			},
			"ip_address": {
				Type:     schema.TypeString,
				Computed: true,
				Optional: true,
				ForceNew: true,
			},
			"ip_protocol": {
				Type:             schema.TypeString,
				Computed:         true,
				Optional:         true,
				ForceNew:         true,
				ValidateFunc:     validation.StringInSlice([]string{"TCP", "UDP", "ESP", "AH", "SCTP", "ICMP", ""}, false),
				DiffSuppressFunc: caseDiffSuppress,
			},
			"all_ports": {
				Type:     schema.TypeBool,
				Optional: true,
				ForceNew: true,
			},
			"backend_service": {
				Type:             schema.TypeString,
				Optional:         true,
				ForceNew:         true,
				DiffSuppressFunc: compareSelfLinkOrResourceName,
			},
			"description": {
				Type:     schema.TypeString,
				Optional: true,
				ForceNew: true,
			},
			"ip_version": {
				Type:         schema.TypeString,
				Optional:     true,
				Deprecated:   "ipVersion is not used for regional forwarding rules. Please remove this field if you are using it.",
				ForceNew:     true,
				ValidateFunc: validation.StringInSlice([]string{"IPV4", "IPV6", ""}, false),
			},
			"load_balancing_scheme": {
				Type:         schema.TypeString,
				Optional:     true,
				ForceNew:     true,
				ValidateFunc: validation.StringInSlice([]string{"INTERNAL", "EXTERNAL", ""}, false),
				Default:      "EXTERNAL",
			},
			"network": {
				Type:             schema.TypeString,
				Computed:         true,
				Optional:         true,
				ForceNew:         true,
				DiffSuppressFunc: compareSelfLinkOrResourceName,
			},
			"network_tier": {
				Type:         schema.TypeString,
				Computed:     true,
				Optional:     true,
				ForceNew:     true,
				ValidateFunc: validation.StringInSlice([]string{"PREMIUM", "STANDARD", ""}, false),
			},
			"port_range": {
				Type:             schema.TypeString,
				Optional:         true,
				ForceNew:         true,
				DiffSuppressFunc: portRangeDiffSuppress,
			},
			"ports": {
				Type:     schema.TypeSet,
				Optional: true,
				ForceNew: true,
				MaxItems: 5,
				Elem: &schema.Schema{
					Type: schema.TypeString,
				},
				Set: schema.HashString,
			},
			"region": {
				Type:             schema.TypeString,
				Computed:         true,
				Optional:         true,
				ForceNew:         true,
				DiffSuppressFunc: compareSelfLinkOrResourceName,
			},
			"service_label": {
				Type:         schema.TypeString,
				Optional:     true,
				ForceNew:     true,
				ValidateFunc: validateGCPName,
			},
			"subnetwork": {
				Type:             schema.TypeString,
				Computed:         true,
				Optional:         true,
				ForceNew:         true,
				DiffSuppressFunc: compareSelfLinkOrResourceName,
			},
			"target": {
				Type:             schema.TypeString,
				Optional:         true,
				DiffSuppressFunc: compareSelfLinkRelativePaths,
			},
			"creation_timestamp": {
				Type:     schema.TypeString,
				Computed: true,
			},
			"service_name": {
				Type:     schema.TypeString,
				Computed: true,
			},
			"project": {
				Type:     schema.TypeString,
				Optional: true,
				Computed: true,
				ForceNew: true,
			},
			"self_link": {
				Type:     schema.TypeString,
				Computed: true,
			},
		},
	}
}

func resourceComputeForwardingRuleCreate(d *schema.ResourceData, meta interface{}) error {
	config := meta.(*Config)

	obj := make(map[string]interface{})
	descriptionProp, err := expandComputeForwardingRuleDescription(d.Get("description"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("description"); !isEmptyValue(reflect.ValueOf(descriptionProp)) && (ok || !reflect.DeepEqual(v, descriptionProp)) {
		obj["description"] = descriptionProp
	}
	IPAddressProp, err := expandComputeForwardingRuleIPAddress(d.Get("ip_address"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("ip_address"); !isEmptyValue(reflect.ValueOf(IPAddressProp)) && (ok || !reflect.DeepEqual(v, IPAddressProp)) {
		obj["IPAddress"] = IPAddressProp
	}
	IPProtocolProp, err := expandComputeForwardingRuleIPProtocol(d.Get("ip_protocol"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("ip_protocol"); !isEmptyValue(reflect.ValueOf(IPProtocolProp)) && (ok || !reflect.DeepEqual(v, IPProtocolProp)) {
		obj["IPProtocol"] = IPProtocolProp
	}
	backendServiceProp, err := expandComputeForwardingRuleBackendService(d.Get("backend_service"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("backend_service"); !isEmptyValue(reflect.ValueOf(backendServiceProp)) && (ok || !reflect.DeepEqual(v, backendServiceProp)) {
		obj["backendService"] = backendServiceProp
	}
	ipVersionProp, err := expandComputeForwardingRuleIpVersion(d.Get("ip_version"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("ip_version"); !isEmptyValue(reflect.ValueOf(ipVersionProp)) && (ok || !reflect.DeepEqual(v, ipVersionProp)) {
		obj["ipVersion"] = ipVersionProp
	}
	loadBalancingSchemeProp, err := expandComputeForwardingRuleLoadBalancingScheme(d.Get("load_balancing_scheme"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("load_balancing_scheme"); !isEmptyValue(reflect.ValueOf(loadBalancingSchemeProp)) && (ok || !reflect.DeepEqual(v, loadBalancingSchemeProp)) {
		obj["loadBalancingScheme"] = loadBalancingSchemeProp
	}
	nameProp, err := expandComputeForwardingRuleName(d.Get("name"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("name"); !isEmptyValue(reflect.ValueOf(nameProp)) && (ok || !reflect.DeepEqual(v, nameProp)) {
		obj["name"] = nameProp
	}
	networkProp, err := expandComputeForwardingRuleNetwork(d.Get("network"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("network"); !isEmptyValue(reflect.ValueOf(networkProp)) && (ok || !reflect.DeepEqual(v, networkProp)) {
		obj["network"] = networkProp
	}
	portRangeProp, err := expandComputeForwardingRulePortRange(d.Get("port_range"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("port_range"); !isEmptyValue(reflect.ValueOf(portRangeProp)) && (ok || !reflect.DeepEqual(v, portRangeProp)) {
		obj["portRange"] = portRangeProp
	}
	portsProp, err := expandComputeForwardingRulePorts(d.Get("ports"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("ports"); !isEmptyValue(reflect.ValueOf(portsProp)) && (ok || !reflect.DeepEqual(v, portsProp)) {
		obj["ports"] = portsProp
	}
	subnetworkProp, err := expandComputeForwardingRuleSubnetwork(d.Get("subnetwork"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("subnetwork"); !isEmptyValue(reflect.ValueOf(subnetworkProp)) && (ok || !reflect.DeepEqual(v, subnetworkProp)) {
		obj["subnetwork"] = subnetworkProp
	}
	targetProp, err := expandComputeForwardingRuleTarget(d.Get("target"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("target"); !isEmptyValue(reflect.ValueOf(targetProp)) && (ok || !reflect.DeepEqual(v, targetProp)) {
		obj["target"] = targetProp
	}
	allPortsProp, err := expandComputeForwardingRuleAllPorts(d.Get("all_ports"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("all_ports"); !isEmptyValue(reflect.ValueOf(allPortsProp)) && (ok || !reflect.DeepEqual(v, allPortsProp)) {
		obj["allPorts"] = allPortsProp
	}
	networkTierProp, err := expandComputeForwardingRuleNetworkTier(d.Get("network_tier"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("network_tier"); !isEmptyValue(reflect.ValueOf(networkTierProp)) && (ok || !reflect.DeepEqual(v, networkTierProp)) {
		obj["networkTier"] = networkTierProp
	}
	serviceLabelProp, err := expandComputeForwardingRuleServiceLabel(d.Get("service_label"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("service_label"); !isEmptyValue(reflect.ValueOf(serviceLabelProp)) && (ok || !reflect.DeepEqual(v, serviceLabelProp)) {
		obj["serviceLabel"] = serviceLabelProp
	}
	regionProp, err := expandComputeForwardingRuleRegion(d.Get("region"), d, config)
	if err != nil {
		return err
	} else if v, ok := d.GetOkExists("region"); !isEmptyValue(reflect.ValueOf(regionProp)) && (ok || !reflect.DeepEqual(v, regionProp)) {
		obj["region"] = regionProp
	}

	url, err := replaceVars(d, config, "https://www.googleapis.com/compute/v1/projects/{{project}}/regions/{{region}}/forwardingRules")
	if err != nil {
		return err
	}

	log.Printf("[DEBUG] Creating new ForwardingRule: %#v", obj)
	res, err := sendRequestWithTimeout(config, "POST", url, obj, d.Timeout(schema.TimeoutCreate))
	if err != nil {
		return fmt.Errorf("Error creating ForwardingRule: %s", err)
	}

	// Store the ID now
	id, err := replaceVars(d, config, "{{name}}")
	if err != nil {
		return fmt.Errorf("Error constructing id: %s", err)
	}
	d.SetId(id)

	project, err := getProject(d, config)
	if err != nil {
		return err
	}
	op := &compute.Operation{}
	err = Convert(res, op)
	if err != nil {
		return err
	}

	waitErr := computeOperationWaitTime(
		config.clientCompute, op, project, "Creating ForwardingRule",
		int(d.Timeout(schema.TimeoutCreate).Minutes()))

	if waitErr != nil {
		// The resource didn't actually create
		d.SetId("")
		return fmt.Errorf("Error waiting to create ForwardingRule: %s", waitErr)
	}

	log.Printf("[DEBUG] Finished creating ForwardingRule %q: %#v", d.Id(), res)

	return resourceComputeForwardingRuleRead(d, meta)
}

func resourceComputeForwardingRuleRead(d *schema.ResourceData, meta interface{}) error {
	config := meta.(*Config)

	url, err := replaceVars(d, config, "https://www.googleapis.com/compute/v1/projects/{{project}}/regions/{{region}}/forwardingRules/{{name}}")
	if err != nil {
		return err
	}

	res, err := sendRequest(config, "GET", url, nil)
	if err != nil {
		return handleNotFoundError(err, d, fmt.Sprintf("ComputeForwardingRule %q", d.Id()))
	}

	project, err := getProject(d, config)
	if err != nil {
		return err
	}
	if err := d.Set("project", project); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}

	if err := d.Set("creation_timestamp", flattenComputeForwardingRuleCreationTimestamp(res["creationTimestamp"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("description", flattenComputeForwardingRuleDescription(res["description"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("ip_address", flattenComputeForwardingRuleIPAddress(res["IPAddress"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("ip_protocol", flattenComputeForwardingRuleIPProtocol(res["IPProtocol"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("backend_service", flattenComputeForwardingRuleBackendService(res["backendService"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("ip_version", flattenComputeForwardingRuleIpVersion(res["ipVersion"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("load_balancing_scheme", flattenComputeForwardingRuleLoadBalancingScheme(res["loadBalancingScheme"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("name", flattenComputeForwardingRuleName(res["name"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("network", flattenComputeForwardingRuleNetwork(res["network"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("port_range", flattenComputeForwardingRulePortRange(res["portRange"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("ports", flattenComputeForwardingRulePorts(res["ports"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("subnetwork", flattenComputeForwardingRuleSubnetwork(res["subnetwork"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("target", flattenComputeForwardingRuleTarget(res["target"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("all_ports", flattenComputeForwardingRuleAllPorts(res["allPorts"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("network_tier", flattenComputeForwardingRuleNetworkTier(res["networkTier"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("service_label", flattenComputeForwardingRuleServiceLabel(res["serviceLabel"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("service_name", flattenComputeForwardingRuleServiceName(res["serviceName"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("region", flattenComputeForwardingRuleRegion(res["region"], d)); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}
	if err := d.Set("self_link", ConvertSelfLinkToV1(res["selfLink"].(string))); err != nil {
		return fmt.Errorf("Error reading ForwardingRule: %s", err)
	}

	return nil
}

func resourceComputeForwardingRuleUpdate(d *schema.ResourceData, meta interface{}) error {
	config := meta.(*Config)

	d.Partial(true)

	if d.HasChange("target") {
		obj := make(map[string]interface{})
		targetProp, err := expandComputeForwardingRuleTarget(d.Get("target"), d, config)
		if err != nil {
			return err
		} else if v, ok := d.GetOkExists("target"); !isEmptyValue(reflect.ValueOf(v)) && (ok || !reflect.DeepEqual(v, targetProp)) {
			obj["target"] = targetProp
		}

		url, err := replaceVars(d, config, "https://www.googleapis.com/compute/v1/projects/{{project}}/regions/{{region}}/forwardingRules/{{name}}/setTarget")
		if err != nil {
			return err
		}
		res, err := sendRequestWithTimeout(config, "POST", url, obj, d.Timeout(schema.TimeoutUpdate))
		if err != nil {
			return fmt.Errorf("Error updating ForwardingRule %q: %s", d.Id(), err)
		}

		project, err := getProject(d, config)
		if err != nil {
			return err
		}
		op := &compute.Operation{}
		err = Convert(res, op)
		if err != nil {
			return err
		}

		err = computeOperationWaitTime(
			config.clientCompute, op, project, "Updating ForwardingRule",
			int(d.Timeout(schema.TimeoutUpdate).Minutes()))

		if err != nil {
			return err
		}

		d.SetPartial("target")
	}

	d.Partial(false)

	return resourceComputeForwardingRuleRead(d, meta)
}

func resourceComputeForwardingRuleDelete(d *schema.ResourceData, meta interface{}) error {
	config := meta.(*Config)

	url, err := replaceVars(d, config, "https://www.googleapis.com/compute/v1/projects/{{project}}/regions/{{region}}/forwardingRules/{{name}}")
	if err != nil {
		return err
	}

	var obj map[string]interface{}
	log.Printf("[DEBUG] Deleting ForwardingRule %q", d.Id())
	res, err := sendRequestWithTimeout(config, "DELETE", url, obj, d.Timeout(schema.TimeoutDelete))
	if err != nil {
		return handleNotFoundError(err, d, "ForwardingRule")
	}

	project, err := getProject(d, config)
	if err != nil {
		return err
	}
	op := &compute.Operation{}
	err = Convert(res, op)
	if err != nil {
		return err
	}

	err = computeOperationWaitTime(
		config.clientCompute, op, project, "Deleting ForwardingRule",
		int(d.Timeout(schema.TimeoutDelete).Minutes()))

	if err != nil {
		return err
	}

	log.Printf("[DEBUG] Finished deleting ForwardingRule %q: %#v", d.Id(), res)
	return nil
}

func resourceComputeForwardingRuleImport(d *schema.ResourceData, meta interface{}) ([]*schema.ResourceData, error) {
	config := meta.(*Config)
	if err := parseImportId([]string{"projects/(?P<project>[^/]+)/regions/(?P<region>[^/]+)/forwardingRules/(?P<name>[^/]+)", "(?P<project>[^/]+)/(?P<region>[^/]+)/(?P<name>[^/]+)", "(?P<name>[^/]+)"}, d, config); err != nil {
		return nil, err
	}

	// Replace import id for the resource id
	id, err := replaceVars(d, config, "{{name}}")
	if err != nil {
		return nil, fmt.Errorf("Error constructing id: %s", err)
	}
	d.SetId(id)

	return []*schema.ResourceData{d}, nil
}

func flattenComputeForwardingRuleCreationTimestamp(v interface{}, d *schema.ResourceData) interface{} {
	return v
}

func flattenComputeForwardingRuleDescription(v interface{}, d *schema.ResourceData) interface{} {
	return v
}

func flattenComputeForwardingRuleIPAddress(v interface{}, d *schema.ResourceData) interface{} {
	return v
}

func flattenComputeForwardingRuleIPProtocol(v interface{}, d *schema.ResourceData) interface{} {
	return v
}

func flattenComputeForwardingRuleBackendService(v interface{}, d *schema.ResourceData) interface{} {
	if v == nil {
		return v
	}
	return ConvertSelfLinkToV1(v.(string))
}

func flattenComputeForwardingRuleIpVersion(v interface{}, d *schema.ResourceData) interface{} {
	return v
}

func flattenComputeForwardingRuleLoadBalancingScheme(v interface{}, d *schema.ResourceData) interface{} {
	return v
}

func flattenComputeForwardingRuleName(v interface{}, d *schema.ResourceData) interface{} {
	return v
}

func flattenComputeForwardingRuleNetwork(v interface{}, d *schema.ResourceData) interface{} {
	if v == nil {
		return v
	}
	return ConvertSelfLinkToV1(v.(string))
}

func flattenComputeForwardingRulePortRange(v interface{}, d *schema.ResourceData) interface{} {
	return v
}

func flattenComputeForwardingRulePorts(v interface{}, d *schema.ResourceData) interface{} {
	if v == nil {
		return v
	}
	return schema.NewSet(schema.HashString, v.([]interface{}))
}

func flattenComputeForwardingRuleSubnetwork(v interface{}, d *schema.ResourceData) interface{} {
	if v == nil {
		return v
	}
	return ConvertSelfLinkToV1(v.(string))
}

func flattenComputeForwardingRuleTarget(v interface{}, d *schema.ResourceData) interface{} {
	if v == nil {
		return v
	}
	return ConvertSelfLinkToV1(v.(string))
}

func flattenComputeForwardingRuleAllPorts(v interface{}, d *schema.ResourceData) interface{} {
	return v
}

func flattenComputeForwardingRuleNetworkTier(v interface{}, d *schema.ResourceData) interface{} {
	return v
}

func flattenComputeForwardingRuleServiceLabel(v interface{}, d *schema.ResourceData) interface{} {
	return v
}

func flattenComputeForwardingRuleServiceName(v interface{}, d *schema.ResourceData) interface{} {
	return v
}

func flattenComputeForwardingRuleRegion(v interface{}, d *schema.ResourceData) interface{} {
	if v == nil {
		return v
	}
	return NameFromSelfLinkStateFunc(v)
}

func expandComputeForwardingRuleDescription(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	return v, nil
}

func expandComputeForwardingRuleIPAddress(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	return v, nil
}

func expandComputeForwardingRuleIPProtocol(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	return v, nil
}

func expandComputeForwardingRuleBackendService(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	// This method returns a full self link from a partial self link.
	if v == nil || v.(string) == "" {
		// It does not try to construct anything from empty.
		return "", nil
	} else if strings.HasPrefix(v.(string), "https://") {
		// Anything that starts with a URL scheme is assumed to be a self link worth using.
		return v, nil
	} else if strings.HasPrefix(v.(string), "projects/") {
		// If the self link references a project, we'll just stuck the compute v1 prefix on it.
		return "https://www.googleapis.com/compute/v1/" + v.(string), nil
	} else if strings.HasPrefix(v.(string), "regions/") || strings.HasPrefix(v.(string), "zones/") {
		// For regional or zonal resources which include their region or zone, just put the project in front.
		url, err := replaceVars(d, config, "https://www.googleapis.com/compute/v1/projects/{{project}}/")
		if err != nil {
			return nil, err
		}
		return url + v.(string), nil
	}
	// Anything else is assumed to be a regional resource, with a partial link that begins with the resource name.
	// This isn't very likely - it's a last-ditch effort to extract something useful here.  We can do a better job
	// as soon as MultiResourceRefs are working since we'll know the types that this field is supposed to point to.
	url, err := replaceVars(d, config, "https://www.googleapis.com/compute/v1/projects/{{project}}/regions/{{region}}/")
	if err != nil {
		return nil, err
	}
	return url + v.(string), nil
}

func expandComputeForwardingRuleIpVersion(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	return v, nil
}

func expandComputeForwardingRuleLoadBalancingScheme(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	return v, nil
}

func expandComputeForwardingRuleName(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	return v, nil
}

func expandComputeForwardingRuleNetwork(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	f, err := parseGlobalFieldValue("networks", v.(string), "project", d, config, true)
	if err != nil {
		return nil, fmt.Errorf("Invalid value for network: %s", err)
	}
	return f.RelativeLink(), nil
}

func expandComputeForwardingRulePortRange(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	return v, nil
}

func expandComputeForwardingRulePorts(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	return v.(*schema.Set).List(), nil
}

func expandComputeForwardingRuleSubnetwork(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	f, err := parseRegionalFieldValue("subnetworks", v.(string), "project", "region", "zone", d, config, true)
	if err != nil {
		return nil, fmt.Errorf("Invalid value for subnetwork: %s", err)
	}
	return f.RelativeLink(), nil
}

func expandComputeForwardingRuleTarget(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	// This method returns a full self link from a partial self link.
	if v == nil || v.(string) == "" {
		// It does not try to construct anything from empty.
		return "", nil
	} else if strings.HasPrefix(v.(string), "https://") {
		// Anything that starts with a URL scheme is assumed to be a self link worth using.
		return v, nil
	} else if strings.HasPrefix(v.(string), "projects/") {
		// If the self link references a project, we'll just stuck the compute v1 prefix on it.
		return "https://www.googleapis.com/compute/v1/" + v.(string), nil
	} else if strings.HasPrefix(v.(string), "regions/") || strings.HasPrefix(v.(string), "zones/") {
		// For regional or zonal resources which include their region or zone, just put the project in front.
		url, err := replaceVars(d, config, "https://www.googleapis.com/compute/v1/projects/{{project}}/")
		if err != nil {
			return nil, err
		}
		return url + v.(string), nil
	}
	// Anything else is assumed to be a regional resource, with a partial link that begins with the resource name.
	// This isn't very likely - it's a last-ditch effort to extract something useful here.  We can do a better job
	// as soon as MultiResourceRefs are working since we'll know the types that this field is supposed to point to.
	url, err := replaceVars(d, config, "https://www.googleapis.com/compute/v1/projects/{{project}}/regions/{{region}}/")
	if err != nil {
		return nil, err
	}
	return url + v.(string), nil
}

func expandComputeForwardingRuleAllPorts(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	return v, nil
}

func expandComputeForwardingRuleNetworkTier(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	return v, nil
}

func expandComputeForwardingRuleServiceLabel(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	return v, nil
}

func expandComputeForwardingRuleRegion(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
	f, err := parseGlobalFieldValue("regions", v.(string), "project", d, config, true)
	if err != nil {
		return nil, fmt.Errorf("Invalid value for region: %s", err)
	}
	return f.RelativeLink(), nil
}