Package archiver implements the pipeline to efficiently archive file sets to an isolated server as fast as possible.
Downloader is a high level interface to an isolatedclient.Client.
Downloader provides functionality to download full isolated trees.
New returns a Downloader instance.
ctx will be used for logging.
FetchIsolated downloads an entire isolated tree into a specified output directory.
Returns a list of paths relative to outputDir for all downloaded files.
Note that this method is not thread-safe and it does not flush the Downloader's directory cache.