/
repo_backend_s3.go
87 lines (81 loc) · 1.94 KB
/
repo_backend_s3.go
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package versions
import (
"context"
"fmt"
"io"
"net/url"
"os"
"github.com/aws/aws-sdk-go-v2/service/s3"
"github.com/qonto/upgrade-manager/internal/infra/aws"
"helm.sh/helm/v3/pkg/repo"
)
type S3HelmRepoBackend struct {
s3client aws.S3Api
bucketUrl *url.URL
}
// Retrieve a file from an S3 backend based on its full url (s3 bucketname + path)
func (h *S3HelmRepoBackend) getFile(ctx context.Context, url *url.URL) (io.ReadCloser, error) {
if url.Scheme != "s3" {
return nil, fmt.Errorf("wrong scheme to get file from s3 url %s, , expected: %s, got: %s", "s3", url, url.Scheme)
}
var bucketKey string
if url.Path != "" && url.Path[0:1] == "/" {
bucketKey = url.Path[1:]
}
f, err := h.s3client.GetObject(ctx, &s3.GetObjectInput{
Bucket: &url.Host,
Key: &bucketKey,
},
)
if err != nil {
return nil, err
}
return f.Body, nil
}
// Retrieve the index.yaml file from the helm chart repository and return them
// in chronological order
func (h *S3HelmRepoBackend) getIndexFile() (*repo.IndexFile, error) {
var index *repo.IndexFile
indexUrl, err := url.Parse(h.bucketUrl.String() + "/index.yaml")
if err != nil {
return index, err
}
ctx, cancel := context.WithTimeout(context.Background(), DefaultTimeout)
defer cancel()
body, err := h.getFile(ctx, indexUrl)
if err != nil {
return index, err
}
raw, err := io.ReadAll(body)
if err != nil {
return nil, err
}
index, err = byteSliceToIndexFile(raw)
if err != nil {
return index, err
}
index.SortEntries()
if err := body.Close(); err != nil {
return index, err
}
return index, nil
}
func byteSliceToIndexFile(data []byte) (*repo.IndexFile, error) {
f, err := os.CreateTemp(os.TempDir(), "*.yaml")
if err != nil {
return nil, err
}
err = os.WriteFile(f.Name(), data, 0o600)
if err != nil {
return nil, err
}
idx, err := repo.LoadIndexFile(f.Name())
if err != nil {
return nil, err
}
err = os.Remove(f.Name())
if err != nil {
return nil, err
}
return idx, err
}