Added data source for aws_efs_file_system, heavily based off of resource_aws_efs_file_systems read method.

builtin/providers/aws/data_source_aws_efs_file_system.go

@@ -0,0 +1,110 @@
+package aws
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/service/efs"
+	"github.com/hashicorp/terraform/helper/schema"
+)
+
+func dataSourceAwsEfsFileSystem() *schema.Resource {
+	return &schema.Resource{
+		Read: dataSourceAwsEfsFileSystemRead,
+
+		Schema: map[string]*schema.Schema{
+			"creation_token": {
+				Type:         schema.TypeString,
+				Optional:     true,
+				Computed:     true,
+				ValidateFunc: validateMaxLength(64),
+			},
+			"id": {
+				Type:     schema.TypeString,
+				Optional: true,
+				Computed: true,
+			},
+			"performance_mode": {
+				Type:     schema.TypeString,
+				Optional: true,
+				Computed: true,
+			},
+			"tags": tagsSchema(),
+		},
+	}
+}
+
+func dataSourceAwsEfsFileSystemRead(d *schema.ResourceData, meta interface{}) error {
+	efsconn := meta.(*AWSClient).efsconn
+	efsCreationToken := d.Get("creation_token").(string)
+	efsFileSystemId := d.Get("id").(string)
+
+	describeEfsOpts := &efs.DescribeFileSystemsInput{}
+	switch {
+	case efsCreationToken != "":
+		describeEfsOpts.CreationToken = aws.String(efsCreationToken)
+	case efsFileSystemId != "":
+		describeEfsOpts.FileSystemId = aws.String(efsFileSystemId)
+	}
+
+	describeResp, err := efsconn.DescribeFileSystems(describeEfsOpts)
+	if err != nil {
+		return fmt.Errorf("Error retrieving EFS: {{err}}", err)
+	}
+	if len(describeResp.FileSystems) != 1 {
+		return fmt.Errorf("Search returned %d results, please revise so only one is returned", len(describeResp.FileSystems))
+	}
+
+	d.SetId(*describeResp.FileSystems[0].FileSystemId)
+
+	tags := make([]*efs.Tag, 0)
+	var marker string
+	for {
+		params := &efs.DescribeTagsInput{
+			FileSystemId: aws.String(d.Id()),
+		}
+		if marker != "" {
+			params.Marker = aws.String(marker)
+		}
+
+		tagsResp, err := efsconn.DescribeTags(params)
+		if err != nil {
+			return fmt.Errorf("Error retrieving EC2 tags for EFS file system (%q): %s",
+				d.Id(), err.Error())
+		}
+
+		for _, tag := range tagsResp.Tags {
+			tags = append(tags, tag)
+		}
+
+		if tagsResp.NextMarker != nil {
+			marker = *tagsResp.NextMarker
+		} else {
+			break
+		}
+	}
+
+	err = d.Set("tags", tagsToMapEFS(tags))
+	if err != nil {
+		return err
+	}
+
+	var fs *efs.FileSystemDescription
+	for _, f := range describeResp.FileSystems {
+		if d.Id() == *f.FileSystemId {
+			fs = f
+			break
+		}
+	}
+	if fs == nil {
+		log.Printf("[WARN] EFS (%s) not found, removing from state", d.Id())
+		d.SetId("")
+		return nil
+	}
+
+	d.Set("creation_token", fs.CreationToken)
+	d.Set("performance_mode", fs.PerformanceMode)
+
+	return nil
+}

builtin/providers/aws/data_source_aws_efs_file_system_test.go

@@ -0,0 +1,75 @@
+package aws
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/hashicorp/terraform/helper/resource"
+	"github.com/hashicorp/terraform/terraform"
+)
+
+func TestAccDataSourceAwsEfsFileSystem(t *testing.T) {
+	resource.Test(t, resource.TestCase{
+		PreCheck:  func() { testAccPreCheck(t) },
+		Providers: testAccProviders,
+		Steps: []resource.TestStep{
+			resource.TestStep{
+				Config: testAccDataSourceAwsEfsFileSystemConfig,
+				Check: resource.ComposeTestCheckFunc(
+					testAccDataSourceAwsEfsFileSystemCheck("data.aws_efs_file_system.by_creation_token"),
+					testAccDataSourceAwsEfsFileSystemCheck("data.aws_efs_file_system.by_id"),
+				),
+			},
+		},
+	})
+}
+
+func testAccDataSourceAwsEfsFileSystemCheck(name string) resource.TestCheckFunc {
+	return func(s *terraform.State) error {
+		rs, ok := s.RootModule().Resources[name]
+		if !ok {
+			return fmt.Errorf("root module has no resource called %s", name)
+		}
+
+		efsRs, ok := s.RootModule().Resources["aws_efs_file_system.test"]
+		if !ok {
+			return fmt.Errorf("can't find aws_efs_file_system.test in state")
+		}
+
+		attr := rs.Primary.Attributes
+
+		if attr["creation_token"] != efsRs.Primary.Attributes["creation_token"] {
+			return fmt.Errorf(
+				"creation_token is %s; want %s",
+				attr["creation_token"],
+				efsRs.Primary.Attributes["creation_token"],
+			)
+		}
+
+		if attr["id"] != efsRs.Primary.Attributes["id"] {
+			return fmt.Errorf(
+				"file_system_id is %s; want %s",
+				attr["id"],
+				efsRs.Primary.Attributes["id"],
+			)
+		}
+
+		return nil
+	}
+}
+
+const testAccDataSourceAwsEfsFileSystemConfig = `
+provider "aws" {
+  region = "us-west-2"
+}
+
+resource "aws_efs_file_system" "test" {}
+
+data "aws_efs_file_system" "by_creation_token" {
+  creation_token = "${aws_efs_file_system.test.creation_token}"
+}
+
+data "aws_efs_file_system" "by_id" {
+  id = "${aws_efs_file_system.test.id}"
+}
+`

builtin/providers/aws/provider.go

@@ -169,6 +169,7 @@ func Provider() terraform.ResourceProvider {
 			"aws_ecs_cluster":              dataSourceAwsEcsCluster(),
 			"aws_ecs_container_definition": dataSourceAwsEcsContainerDefinition(),
 			"aws_ecs_task_definition":      dataSourceAwsEcsTaskDefinition(),
+			"aws_efs_file_system":          dataSourceAwsEfsFileSystem(),
 			"aws_eip":                      dataSourceAwsEip(),
 			"aws_elb_hosted_zone_id":       dataSourceAwsElbHostedZoneId(),
 			"aws_elb_service_account":      dataSourceAwsElbServiceAccount(),