terraform-provider-google/google/provider.go

package google

import (
	"encoding/json"
	"fmt"

	"github.com/hashicorp/terraform/helper/mutexkv"
	"github.com/hashicorp/terraform/helper/schema"
	"github.com/hashicorp/terraform/terraform"
)

// Global MutexKV
var mutexKV = mutexkv.NewMutexKV()

// Provider returns a terraform.ResourceProvider.
func Provider() terraform.ResourceProvider {
	return &schema.Provider{
		Schema: map[string]*schema.Schema{
			"credentials": &schema.Schema{
				Type:     schema.TypeString,
				Optional: true,
				DefaultFunc: schema.MultiEnvDefaultFunc([]string{
					"GOOGLE_CREDENTIALS",
					"GOOGLE_CLOUD_KEYFILE_JSON",
					"GCLOUD_KEYFILE_JSON",
				}, nil),
				ValidateFunc: validateCredentials,
			},

			"project": &schema.Schema{
				Type:     schema.TypeString,
				Optional: true,
				DefaultFunc: schema.MultiEnvDefaultFunc([]string{
					"GOOGLE_PROJECT",
					"GCLOUD_PROJECT",
					"CLOUDSDK_CORE_PROJECT",
				}, nil),
			},

			"region": &schema.Schema{
				Type:     schema.TypeString,
				Required: true,
				DefaultFunc: schema.MultiEnvDefaultFunc([]string{
					"GOOGLE_REGION",
					"GCLOUD_REGION",
					"CLOUDSDK_COMPUTE_REGION",
				}, nil),
			},
		},

		DataSourcesMap: map[string]*schema.Resource{
			"google_dns_managed_zone":          dataSourceDnsManagedZone(),
			"google_client_config":             dataSourceGoogleClientConfig(),
			"google_compute_network":           dataSourceGoogleComputeNetwork(),
			"google_compute_subnetwork":        dataSourceGoogleComputeSubnetwork(),
			"google_compute_zones":             dataSourceGoogleComputeZones(),
			"google_compute_instance_group":    dataSourceGoogleComputeInstanceGroup(),
			"google_container_engine_versions": dataSourceGoogleContainerEngineVersions(),
			"google_iam_policy":                dataSourceGoogleIamPolicy(),
			"google_storage_object_signed_url": dataSourceGoogleSignedUrl(),
		},

		ResourcesMap: map[string]*schema.Resource{
			"google_bigquery_dataset":                      resourceBigQueryDataset(),
			"google_bigquery_table":                        resourceBigQueryTable(),
			"google_bigtable_instance":                     resourceBigtableInstance(),
			"google_bigtable_table":                        resourceBigtableTable(),
			"google_compute_autoscaler":                    resourceComputeAutoscaler(),
			"google_compute_address":                       resourceComputeAddress(),
			"google_compute_backend_bucket":                resourceComputeBackendBucket(),
			"google_compute_backend_service":               resourceComputeBackendService(),
			"google_compute_disk":                          resourceComputeDisk(),
			"google_compute_snapshot":                      resourceComputeSnapshot(),
			"google_compute_firewall":                      resourceComputeFirewall(),
			"google_compute_forwarding_rule":               resourceComputeForwardingRule(),
			"google_compute_global_address":                resourceComputeGlobalAddress(),
			"google_compute_global_forwarding_rule":        resourceComputeGlobalForwardingRule(),
			"google_compute_health_check":                  resourceComputeHealthCheck(),
			"google_compute_http_health_check":             resourceComputeHttpHealthCheck(),
			"google_compute_https_health_check":            resourceComputeHttpsHealthCheck(),
			"google_compute_image":                         resourceComputeImage(),
			"google_compute_instance":                      resourceComputeInstance(),
			"google_compute_instance_group":                resourceComputeInstanceGroup(),
			"google_compute_instance_group_manager":        resourceComputeInstanceGroupManager(),
			"google_compute_instance_template":             resourceComputeInstanceTemplate(),
			"google_compute_network":                       resourceComputeNetwork(),
			"google_compute_network_peering":               resourceComputeNetworkPeering(),
			"google_compute_project_metadata":              resourceComputeProjectMetadata(),
			"google_compute_project_metadata_item":         resourceComputeProjectMetadataItem(),
			"google_compute_region_backend_service":        resourceComputeRegionBackendService(),
			"google_compute_region_instance_group_manager": resourceComputeRegionInstanceGroupManager(),
			"google_compute_route":                         resourceComputeRoute(),
			"google_compute_router":                        resourceComputeRouter(),
			"google_compute_router_interface":              resourceComputeRouterInterface(),
			"google_compute_router_peer":                   resourceComputeRouterPeer(),
			"google_compute_shared_vpc":                    resourceComputeSharedVpc(),
			"google_compute_ssl_certificate":               resourceComputeSslCertificate(),
			"google_compute_subnetwork":                    resourceComputeSubnetwork(),
			"google_compute_target_http_proxy":             resourceComputeTargetHttpProxy(),
			"google_compute_target_https_proxy":            resourceComputeTargetHttpsProxy(),
			"google_compute_target_pool":                   resourceComputeTargetPool(),
			"google_compute_url_map":                       resourceComputeUrlMap(),
			"google_compute_vpn_gateway":                   resourceComputeVpnGateway(),
			"google_compute_vpn_tunnel":                    resourceComputeVpnTunnel(),
			"google_container_cluster":                     resourceContainerCluster(),
			"google_container_node_pool":                   resourceContainerNodePool(),
			"google_dns_managed_zone":                      resourceDnsManagedZone(),
			"google_dns_record_set":                        resourceDnsRecordSet(),
			"google_sourcerepo_repository":                 resourceSourceRepoRepository(),
			"google_spanner_instance":                      resourceSpannerInstance(),
			"google_spanner_database":                      resourceSpannerDatabase(),
			"google_sql_database":                          resourceSqlDatabase(),
			"google_sql_database_instance":                 resourceSqlDatabaseInstance(),
			"google_sql_user":                              resourceSqlUser(),
			"google_project":                               resourceGoogleProject(),
			"google_project_iam_policy":                    resourceGoogleProjectIamPolicy(),
			"google_project_iam_binding":                   resourceGoogleProjectIamBinding(),
			"google_project_iam_member":                    resourceGoogleProjectIamMember(),
			"google_project_services":                      resourceGoogleProjectServices(),
			"google_pubsub_topic":                          resourcePubsubTopic(),
			"google_pubsub_subscription":                   resourcePubsubSubscription(),
			"google_runtimeconfig_config":                  resourceRuntimeconfigConfig(),
			"google_runtimeconfig_variable":                resourceRuntimeconfigVariable(),
			"google_service_account":                       resourceGoogleServiceAccount(),
			"google_storage_bucket":                        resourceStorageBucket(),
			"google_storage_bucket_acl":                    resourceStorageBucketAcl(),
			"google_storage_bucket_object":                 resourceStorageBucketObject(),
			"google_storage_object_acl":                    resourceStorageObjectAcl(),
		},

		ConfigureFunc: providerConfigure,
	}
}

func providerConfigure(d *schema.ResourceData) (interface{}, error) {
	credentials := d.Get("credentials").(string)
	config := Config{
		Credentials: credentials,
		Project:     d.Get("project").(string),
		Region:      d.Get("region").(string),
	}

	if err := config.loadAndValidate(); err != nil {
		return nil, err
	}

	return &config, nil
}

func validateCredentials(v interface{}, k string) (warnings []string, errors []error) {
	if v == nil || v.(string) == "" {
		return
	}
	creds := v.(string)
	var account accountFile
	if err := json.Unmarshal([]byte(creds), &account); err != nil {
		errors = append(errors,
			fmt.Errorf("credentials are not valid JSON '%s': %s", creds, err))
	}

	return
}