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options_s3.go
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options_s3.go
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package localstack
import (
"fmt"
"os"
"path"
"path/filepath"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/johanhugg/gnomock"
)
// WithS3Files sets up S3 service running in localstack with the contents of
// `path` directory. The first level children of `path` must be directories,
// their names will be used to create buckets. Below them, all the files in any
// other directories, these files will be uploaded as-is.
//
// For example, if you put your test files in testdata/my-bucket/dir/, Gnomock
// will create "my-bucket" for you, and pull "dir" with all its contents into
// this bucket.
//
// This function does nothing if you don't provide localstack.S3 as one of the
// services in WithServices.
func WithS3Files(path string) Option {
return func(p *P) {
p.S3Path = path
}
}
func (p *P) initS3(c *gnomock.Container) error {
if p.S3Path == "" {
return nil
}
s3Endpoint := fmt.Sprintf("http://%s/", c.Address(APIPort))
config := &aws.Config{
Region: aws.String("us-east-1"),
Endpoint: aws.String(s3Endpoint),
S3ForcePathStyle: aws.Bool(true),
Credentials: credentials.NewStaticCredentials("a", "b", "c"),
}
sess, err := session.NewSession(config)
if err != nil {
return fmt.Errorf("can't create s3 session: %w", err)
}
svc := s3.New(sess)
buckets, err := p.createBuckets(svc)
if err != nil {
return fmt.Errorf("can't create buckets: %w", err)
}
err = p.uploadFiles(svc, buckets)
if err != nil {
return err
}
return nil
}
func (p *P) createBuckets(svc *s3.S3) ([]string, error) {
files, err := os.ReadDir(p.S3Path)
if err != nil {
return nil, fmt.Errorf("can't read s3 initial files: %w", err)
}
buckets := []string{}
// create buckets from top-level folders under `path`
for _, f := range files {
if !f.IsDir() {
continue
}
bucket := f.Name()
err := p.createBucket(svc, bucket)
if err != nil {
return nil, fmt.Errorf("can't create bucket '%s': %w", bucket, err)
}
buckets = append(buckets, bucket)
}
return buckets, nil
}
func (p *P) createBucket(svc *s3.S3, bucket string) error {
input := &s3.CreateBucketInput{Bucket: aws.String(bucket)}
if _, err := svc.CreateBucket(input); err != nil {
return fmt.Errorf("can't create bucket '%s': %w", bucket, err)
}
return nil
}
func (p *P) uploadFiles(svc *s3.S3, buckets []string) error {
for _, bucket := range buckets {
bucket := bucket
err := filepath.Walk(
path.Join(p.S3Path, bucket),
func(fPath string, file os.FileInfo, err error) error {
if err != nil {
return fmt.Errorf("error reading input file '%s': %w", fPath, err)
}
if file.IsDir() {
return nil
}
err = p.uploadFile(svc, bucket, fPath)
if err != nil {
return err
}
return nil
},
)
if err != nil {
return fmt.Errorf("error uploading input dir: %w", err)
}
}
return nil
}
func (p *P) uploadFile(svc *s3.S3, bucket, file string) (err error) {
inputFile, err := os.Open(file) //nolint:gosec
if err != nil {
return fmt.Errorf("can't open file '%s': %w", file, err)
}
defer func() {
closeErr := inputFile.Close()
if err == nil && closeErr != nil {
err = closeErr
}
}()
localPath := path.Join(p.S3Path, bucket)
key := file[len(localPath):]
input := &s3.PutObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
Body: inputFile,
}
_, err = svc.PutObject(input)
if err != nil {
return fmt.Errorf("can't upload file '%s' to bucket '%s': %w", file, bucket, err)
}
return nil
}