| // Copyright 2019 The Vanadium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package gerrit |
| |
| import ( |
| "errors" |
| "fmt" |
| "io" |
| "io/ioutil" |
| "net/http" |
| "net/url" |
| "os" |
| "path" |
| "path/filepath" |
| |
| "fuchsia.googlesource.com/jiri" |
| ) |
| |
| var ( |
| // ErrCloneBundleNotAvailable will be returned from FetchCloneBundle |
| // if clone.bundle file does not exist or cannot be fetched from remote. |
| ErrCloneBundleNotAvailable = errors.New("git clone bundle not available") |
| ) |
| |
| const ( |
| bundleFile = "clone.bundle" |
| ) |
| |
| // FetchCloneBundle fetches git clone.bundle file from remote and save it to |
| // dir/clone.bundle . If if clone.bundle file does not exist or cannot be fetched |
| // from remote, ErrCloneBundleNotAvailable will be returned. |
| func FetchCloneBundle(jirix *jiri.X, remote, dir string) (string, error) { |
| bundleURL, err := url.Parse(remote) |
| if err != nil { |
| return "", err |
| } |
| bundleURL.Path = path.Join(bundleURL.Path, bundleFile) |
| if bundleURL.Scheme != "https" { |
| // sso is not supported. |
| return "", ErrCloneBundleNotAvailable |
| } |
| |
| downloadPath := filepath.Join(dir, bundleFile) |
| if err := fetchFileToLocal(bundleURL.String(), downloadPath); err != nil { |
| jirix.Logger.Debugf("fetch clone.bundle for %q failed due to error: %v", bundleURL.String(), err) |
| return "", ErrCloneBundleNotAvailable |
| } |
| return downloadPath, nil |
| } |
| |
| func fetchFileToLocal(remoteURL, local string) error { |
| client := &http.Client{} |
| req, err := http.NewRequest("GET", remoteURL, nil) |
| if err != nil { |
| return err |
| } |
| resp, err := client.Do(req) |
| if err != nil { |
| return err |
| } |
| if resp.StatusCode != http.StatusOK { |
| return fmt.Errorf("fetch failed due to Status code: %v", resp.StatusCode) |
| } |
| defer resp.Body.Close() |
| |
| tempFile, err := ioutil.TempFile("", "clone.bundle.*") |
| if err != nil { |
| return fmt.Errorf("create temp file failed due to error: %v", err) |
| } |
| defer tempFile.Close() |
| defer os.Remove(tempFile.Name()) |
| |
| _, err = io.Copy(tempFile, resp.Body) |
| if err != nil { |
| return fmt.Errorf("save remote data to local failed due to error: %v", err) |
| } |
| tempFile.Close() |
| if err := os.Rename(tempFile.Name(), local); err != nil { |
| return fmt.Errorf("failed to move %q to %q due to error: %v", tempFile.Name(), local, err) |
| } |
| return nil |
| } |