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getGlobalConfigS3.go
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getGlobalConfigS3.go
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package truss
import (
"os"
"path"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/credentials/stscreds"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/aws/aws-sdk-go/service/s3/s3manager"
)
// GetGlobalConfigS3Input input for GetGlobalConfigS3
type GetGlobalConfigS3Input struct {
Bucket string
Region string
Key string
Role string
Dir string
}
// GetGlobalConfigS3 fetch global config from S3 and put it in home dir
func GetGlobalConfigS3(input *GetGlobalConfigS3Input) (string, error) {
sess, _ := session.NewSession(&aws.Config{
Region: aws.String(input.Region)},
)
if input.Role != "" {
sess.Config.Credentials = stscreds.NewCredentials(sess, input.Role)
}
dir := input.Dir
file, err := os.Create(path.Join(dir, ".truss.yaml"))
if err != nil {
return "", err
}
defer file.Close()
downloader := s3manager.NewDownloader(sess)
_, err = downloader.Download(file,
&s3.GetObjectInput{
Bucket: aws.String(input.Bucket),
Key: &input.Key,
})
return file.Name(), err
}