genegraph.sink.fetch

compressed?

(compressed? target-file)
Return true if target file has been compressed

fetch-all-remote-assets

(fetch-all-remote-assets remote-assets)

fetch-data

(fetch-data url-str target-file opts)
retrieve file from remote url and store in data directory
used to stage imports from external sources. Currently supports only
http and ftp

get-ftp

(get-ftp url target-file & opts)

get-http

(get-http url target-file opts)
Retrieve, store, and (if necessary) decompress location at url and store 
at target-file 

unzip-target

(unzip-target file-name)
Unzip downloaded file if it is compressed; save in same location sans
extension

zip-exts