func prepareRepo(cacheKey string) (string, error) {
path, err := ioutil.TempDir("", "repo-"+cacheKey)
if err != nil {
return "", err
}
res, err := http.Get(blobstoreCacheURL(cacheKey))
if err != nil {
return "", err
}
defer res.Body.Close()
if res.StatusCode == 404 {
return path, initRepo(path)
}
if res.StatusCode != 200 {
return "", fmt.Errorf("unexpected error %d retrieving cached repo", res.StatusCode)
}
r := tar.NewReader(res.Body)
if err := archiver.Untar(path, r); err != nil {
return "", err
}
if err := writeRepoHook(path); err != nil {
return "", err
}
return path, nil
}
func restoreBlobstoreCache(tempDir, path string) error {
cachePath := tempDir + "/" + path
res, err := http.Get("http://blobstore.discoverd/cache/" + path + ".tar")
if err != nil {
return err
}
defer res.Body.Close()
if res.StatusCode == 200 {
// cache hit
r := tar.NewReader(res.Body)
archiver.Untar(cachePath, r)
}
return nil
}
func restoreBlobstoreCache(tempDir, path string) error {
cachePath := filepath.Join(tempDir, path)
res, err := http.Get(blobstoreCacheURL(path))
if err != nil {
return err
}
defer res.Body.Close()
if res.StatusCode == 200 {
// cache hit
r := tar.NewReader(res.Body)
return archiver.Untar(cachePath, r)
}
return nil
}