Add AwsRouteInvalidInstanceDetector

detector/aws_route_invalid_instance.go

@@ -0,0 +1,64 @@
+package detector
+
+import (
+	"fmt"
+
+	"github.com/hashicorp/hcl/hcl/ast"
+	"github.com/wata727/tflint/issue"
+)
+
+type AwsRouteInvalidInstanceDetector struct {
+	*Detector
+	IssueType string
+	Target    string
+	DeepCheck bool
+	instances map[string]bool
+}
+
+func (d *Detector) CreateAwsRouteInvalidInstanceDetector() *AwsRouteInvalidInstanceDetector {
+	return &AwsRouteInvalidInstanceDetector{
+		Detector:  d,
+		IssueType: issue.ERROR,
+		Target:    "aws_route",
+		DeepCheck: true,
+		instances: map[string]bool{},
+	}
+}
+
+func (d *AwsRouteInvalidInstanceDetector) PreProcess() {
+	resp, err := d.AwsClient.DescribeInstances()
+	if err != nil {
+		d.Logger.Error(err)
+		d.Error = true
+		return
+	}
+
+	for _, reservation := range resp.Reservations {
+		for _, instance := range reservation.Instances {
+			d.instances[*instance.InstanceId] = true
+		}
+	}
+}
+
+func (d *AwsRouteInvalidInstanceDetector) Detect(file string, item *ast.ObjectItem, issues *[]*issue.Issue) {
+	instanceToken, err := hclLiteralToken(item, "instance_id")
+	if err != nil {
+		d.Logger.Error(err)
+		return
+	}
+	instance, err := d.evalToString(instanceToken.Text)
+	if err != nil {
+		d.Logger.Error(err)
+		return
+	}
+
+	if !d.instances[instance] {
+		issue := &issue.Issue{
+			Type:    d.IssueType,
+			Message: fmt.Sprintf("\"%s\" is invalid instance ID.", instance),
+			Line:    instanceToken.Pos.Line,
+			File:    file,
+		}
+		*issues = append(*issues, issue)
+	}
+}

detector/aws_route_invalid_instance_test.go

@@ -0,0 +1,98 @@
+package detector
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/service/ec2"
+	"github.com/golang/mock/gomock"
+	"github.com/k0kubun/pp"
+	"github.com/wata727/tflint/config"
+	"github.com/wata727/tflint/issue"
+	"github.com/wata727/tflint/mock"
+)
+
+func TestDetectAwsRouteInvalidInstance(t *testing.T) {
+	cases := []struct {
+		Name     string
+		Src      string
+		Response []*ec2.Instance
+		Issues   []*issue.Issue
+	}{
+		{
+			Name: "instance id is invalid",
+			Src: `
+resource "aws_route" "foo" {
+    instance_id = "i-1234abcd"
+}`,
+			Response: []*ec2.Instance{
+				{
+					InstanceId: aws.String("i-5678abcd"),
+				},
+				{
+					InstanceId: aws.String("i-abcd1234"),
+				},
+			},
+			Issues: []*issue.Issue{
+				{
+					Type:    "ERROR",
+					Message: "\"i-1234abcd\" is invalid instance ID.",
+					Line:    3,
+					File:    "test.tf",
+				},
+			},
+		},
+		{
+			Name: "instance id is valid",
+			Src: `
+resource "aws_route" "foo" {
+    instance_id = "i-1234abcd"
+}`,
+			Response: []*ec2.Instance{
+				{
+					InstanceId: aws.String("i-1234abcd"),
+				},
+				{
+					InstanceId: aws.String("i-abcd1234"),
+				},
+			},
+			Issues: []*issue.Issue{},
+		},
+	}
+
+	for _, tc := range cases {
+		c := config.Init()
+		c.DeepCheck = true
+
+		awsClient := c.NewAwsClient()
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		ec2mock := mock.NewMockEC2API(ctrl)
+		ec2mock.EXPECT().DescribeInstances(&ec2.DescribeInstancesInput{}).Return(&ec2.DescribeInstancesOutput{
+			Reservations: []*ec2.Reservation{
+				{
+					Instances: tc.Response,
+				},
+			},
+		}, nil)
+		awsClient.Ec2 = ec2mock
+
+		var issues = []*issue.Issue{}
+		err := TestDetectByCreatorName(
+			"CreateAwsRouteInvalidInstanceDetector",
+			tc.Src,
+			"",
+			c,
+			awsClient,
+			&issues,
+		)
+		if err != nil {
+			t.Fatalf("\nERROR: %s", err)
+		}
+
+		if !reflect.DeepEqual(issues, tc.Issues) {
+			t.Fatalf("\nBad: %s\nExpected: %s\n\ntestcase: %s", pp.Sprint(issues), pp.Sprint(tc.Issues), tc.Name)
+		}
+	}
+}

detector/aws_route_invalid_vpc_peering_connection.go

@@ -42,13 +42,11 @@ func (d *AwsRouteInvalidVpcPeeringConnectionDetector) Detect(file string, item *
 	vpcPeeringConnectionToken, err := hclLiteralToken(item, "vpc_peering_connection_id")
 	if err != nil {
 		d.Logger.Error(err)
-		d.Error = true
 		return
 	}
 	vpcPeeringConnection, err := d.evalToString(vpcPeeringConnectionToken.Text)
 	if err != nil {
 		d.Logger.Error(err)
-		d.Error = true
 		return
 	}
 

detector/detector.go

@@ -70,6 +70,7 @@ var detectors = map[string]string{
 	"aws_route_invalid_egress_only_gateway":           "CreateAwsRouteInvalidEgressOnlyGatewayDetector",
 	"aws_route_invalid_nat_gateway":                   "CreateAwsRouteInvalidNatGatewayDetector",
 	"aws_route_invalid_vpc_peering_connection":        "CreateAwsRouteInvalidVpcPeeringConnectionDetector",
+	"aws_route_invalid_instance":                      "CreateAwsRouteInvalidInstanceDetector",
 }
 
 func NewDetector(templates map[string]*ast.File, state *state.TFState, tfvars []*ast.File, c *config.Config) (*Detector, error) {

docs/README.md

@@ -60,6 +60,7 @@ Report these issues if you have specified invalid resource ID, name, etc. All is
     - aws_route_invalid_egress_only_gateway
     - aws_route_invalid_nat_gateway
     - aws_route_invalid_vpc_peering_connection
+    - aws_route_invalid_instance
 
 ### Duplicate Resource Issue
 Report these issues if you have specified resource ID, name, etc that already existed and must be unique. All issues are reported as ERROR. These issues are reported when enabled deep check. For example, it happens when resources with the same name is already created. Please check the actual resources again.