// Returns the resulting file or in case of extraction the destination
// directory (for logging).
static Try<string> fetchThroughCache(
const FetcherInfo::Item& item,
const Option<string>& cacheDirectory,
const string& sandboxDirectory,
const Option<string>& frameworksHome)
{
if (cacheDirectory.isNone() || cacheDirectory.get().empty()) {
return Error("Cache directory not specified");
}
if (!item.has_cache_filename() || item.cache_filename().empty()) {
// This should never happen if this program is used by the Mesos
// slave and could then be a CHECK. But other uses are possible.
return Error("No cache file name for: " + item.uri().value());
}
CHECK_NE(FetcherInfo::Item::BYPASS_CACHE, item.action())
<< "Unexpected fetcher action selector";
if (item.action() == FetcherInfo::Item::DOWNLOAD_AND_CACHE) {
LOG(INFO) << "Downloading into cache";
Try<Nothing> mkdir = os::mkdir(cacheDirectory.get());
if (mkdir.isError()) {
return Error("Failed to create fetcher cache directory '" +
cacheDirectory.get() + "': " + mkdir.error());
}
Try<string> downloaded = download(
item.uri().value(),
path::join(cacheDirectory.get(), item.cache_filename()),
frameworksHome);
if (downloaded.isError()) {
return Error(downloaded.error());
}
}
return fetchFromCache(item, cacheDirectory.get(), sandboxDirectory);
}
// Returns the resulting file or in case of extraction the destination
// directory (for logging).
static Try<string> fetch(
const FetcherInfo::Item& item,
const Option<string>& cacheDirectory,
const string& sandboxDirectory,
const Option<string>& frameworksHome)
{
LOG(INFO) << "Fetching URI '" << item.uri().value() << "'";
if (item.action() == FetcherInfo::Item::BYPASS_CACHE) {
return fetchBypassingCache(
item.uri(),
sandboxDirectory,
frameworksHome);
}
return fetchThroughCache(
item,
cacheDirectory,
sandboxDirectory,
frameworksHome);
}