package artifact import ( "context" "fmt" "io/ioutil" "net/http" "gitlab.com/slon/shad-go/distbuild/pkg/build" "gitlab.com/slon/shad-go/distbuild/pkg/tarstream" ) // Download artifact from remote cache into local cache. func Download(ctx context.Context, endpoint string, c *Cache, artifactID build.ID) error { dir, commit, abort, err := c.Create(artifactID) if err != nil { return err } defer abort() req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint+"/artifact?id="+artifactID.String(), nil) if err != nil { return err } rsp, err := http.DefaultClient.Do(req) if err != nil { return err } defer rsp.Body.Close() if rsp.StatusCode != http.StatusOK { errStr, _ := ioutil.ReadAll(rsp.Body) return fmt.Errorf("download: %s", errStr) } if err := tarstream.Receive(dir, rsp.Body); err != nil { return err } return commit() }