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cloudformation.go
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cloudformation.go
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//go:generate mockgen -source=$GOFILE -destination=cloudformation_mock.go -package=$GOPACKAGE -write_package_comment=false
package client
import (
"context"
"strings"
"time"
"github.com/aws/aws-sdk-go-v2/service/cloudformation"
"github.com/aws/aws-sdk-go-v2/service/cloudformation/types"
)
const CloudFormationWaitNanoSecTime = time.Duration(4500000000000)
type ICloudFormation interface {
DeleteStack(ctx context.Context, stackName *string, retainResources []string) error
DescribeStacks(ctx context.Context, stackName *string) ([]types.Stack, error)
ListStackResources(ctx context.Context, stackName *string) ([]types.StackResourceSummary, error)
ListStacks(ctx context.Context, stackStatusFilter []types.StackStatus) ([]types.StackSummary, error)
}
var _ ICloudFormation = (*CloudFormation)(nil)
type CloudFormation struct {
client *cloudformation.Client
waiter *cloudformation.StackDeleteCompleteWaiter
}
func NewCloudFormation(client *cloudformation.Client, waiter *cloudformation.StackDeleteCompleteWaiter) *CloudFormation {
return &CloudFormation{
client,
waiter,
}
}
func (c *CloudFormation) DeleteStack(ctx context.Context, stackName *string, retainResources []string) error {
input := &cloudformation.DeleteStackInput{
StackName: stackName,
RetainResources: retainResources,
}
if _, err := c.client.DeleteStack(ctx, input); err != nil {
return &ClientError{
ResourceName: stackName,
Err: err,
}
}
if err := c.waitDeleteStack(ctx, stackName); err != nil {
return &ClientError{
ResourceName: stackName,
Err: err,
}
}
return nil
}
func (c *CloudFormation) DescribeStacks(ctx context.Context, stackName *string) ([]types.Stack, error) {
var nextToken *string
stacks := []types.Stack{}
for {
select {
case <-ctx.Done():
return stacks, &ClientError{
ResourceName: stackName,
Err: ctx.Err(),
}
default:
}
// If a stackName is nil, then return all stacks
input := &cloudformation.DescribeStacksInput{
NextToken: nextToken,
StackName: stackName,
}
output, err := c.client.DescribeStacks(ctx, input)
if err != nil && strings.Contains(err.Error(), "does not exist") {
return stacks, nil
}
if err != nil {
return stacks, &ClientError{
ResourceName: stackName,
Err: err,
}
}
if len(stacks) == 0 && len(output.Stacks) == 0 {
return stacks, nil
}
stacks = append(stacks, output.Stacks...)
nextToken = output.NextToken
if nextToken == nil {
break
}
}
return stacks, nil
}
func (c *CloudFormation) waitDeleteStack(ctx context.Context, stackName *string) error {
input := &cloudformation.DescribeStacksInput{
StackName: stackName,
}
err := c.waiter.Wait(ctx, input, CloudFormationWaitNanoSecTime)
if err != nil && !strings.Contains(err.Error(), "waiter state transitioned to Failure") {
return err // return non wrapping error because wrap in public callers
}
return nil
}
func (c *CloudFormation) ListStackResources(ctx context.Context, stackName *string) ([]types.StackResourceSummary, error) {
var nextToken *string
stackResourceSummaries := []types.StackResourceSummary{}
for {
select {
case <-ctx.Done():
return stackResourceSummaries, &ClientError{
ResourceName: stackName,
Err: ctx.Err(),
}
default:
}
input := &cloudformation.ListStackResourcesInput{
StackName: stackName,
NextToken: nextToken,
}
output, err := c.client.ListStackResources(ctx, input)
if err != nil {
return stackResourceSummaries, &ClientError{
ResourceName: stackName,
Err: err,
}
}
stackResourceSummaries = append(stackResourceSummaries, output.StackResourceSummaries...)
nextToken = output.NextToken
if nextToken == nil {
break
}
}
return stackResourceSummaries, nil
}
func (c *CloudFormation) ListStacks(ctx context.Context, stackStatusFilter []types.StackStatus) ([]types.StackSummary, error) {
var nextToken *string
stackSummaries := []types.StackSummary{}
for {
select {
case <-ctx.Done():
return stackSummaries, &ClientError{
Err: ctx.Err(),
}
default:
}
input := &cloudformation.ListStacksInput{
StackStatusFilter: stackStatusFilter,
NextToken: nextToken,
}
output, err := c.client.ListStacks(ctx, input)
if err != nil {
return stackSummaries, &ClientError{
Err: err,
}
}
if len(stackSummaries) == 0 && len(output.StackSummaries) == 0 {
return stackSummaries, nil
}
stackSummaries = append(stackSummaries, output.StackSummaries...)
nextToken = output.NextToken
if nextToken == nil {
break
}
}
return stackSummaries, nil
}