package--download-one-archive
package--download-one-archive is a compiled Lisp function in `package.el
'.
(package--download-one-archive ARCHIVE FILE)
Retrieve an archive file FILE from ARCHIVE, and cache it.
ARCHIVE should be a cons cell of the form (NAME . LOCATION),
similar to an entry in `package-alist'. Save the cached copy to
"archives/NAME/archive-contents" in `package-user-dir'.